studio.css

/* ==========================================================================
   CarboxMol — Crystallographic Workbench Stylesheet
   Version: 0.4.5
   Author: Suleiman M Hajizadeh & Garib N Murshudov
   ========================================================================== */

:root {
    --bg-main: #080c15;
    --bg-panel: #0c1525;
    --bg-card: rgba(20, 30, 50, 0.75);
    --bg-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(255, 255, 255, 0.10);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-cyan: #06b6d4;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-green: #22c55e;
    --accent-amber: #f59e0b;
    --accent-rose: #f43f5e;
    --accent-red: #ef4444;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Roboto Mono', monospace;
    --font-ui: 'Inter', -apple-system, sans-serif;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.7);
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.35);
    --glow-purple: 0 0 20px rgba(139, 92, 246, 0.35);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    flex-direction: column;
}

/* ─── Top Studio Navbar ──────────────────────────────────────────────────────── */

.studio-header {
    height: 42px;
    min-height: 42px;
    background: rgba(10, 16, 30, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(56, 189, 248, 0.22);
    box-shadow: 0 1px 0 rgba(6, 182, 212, 0.12), 0 4px 16px rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    gap: 8px;
    flex-wrap: nowrap;
    z-index: 9000;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    position: relative;
}
.studio-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(6, 182, 212, 0.35) 20%,
        rgba(59, 130, 246, 0.25) 50%,
        rgba(139, 92, 246, 0.2) 80%,
        transparent 100%);
    pointer-events: none;
}
.studio-header::-webkit-scrollbar {
    display: none;
}

.studio-header-group {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    flex-wrap: nowrap;
}

.studio-header-left {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.studio-header-center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 1 1 auto;
    min-width: 0;
}

.studio-header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    flex-shrink: 0;
    margin-left: auto;
}

.studio-pill-group {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 1px 3px;
    gap: 2px;
    flex-shrink: 0;
}

.studio-pill-group .btn-studio {
    border-radius: 4px;
    padding: 2px 5px;
    font-size: 10px;
    font-weight: 600;
    height: 24px;
    line-height: 1;
    background: transparent;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    color: #cbd5e1;
    white-space: nowrap;
    transition: all 0.15s ease;
}

.studio-pill-group .btn-studio:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

/* ─── Workbench Options & Panels Select & Controls ────────────────────────────── */
/* ─── Workbench Options Hub & Command Palette ───────────────────────────────── */
.workbench-hub-anchor {
    position: relative;
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.workbench-hub-trigger {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.85));
    border: 1px solid rgba(56, 189, 248, 0.4);
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 11.5px;
    font-weight: 600;
    color: #f8fafc;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(56, 189, 248, 0.1);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    user-select: none;
}

.workbench-hub-trigger:hover {
    border-color: rgba(56, 189, 248, 0.8);
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(14, 116, 144, 0.2));
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35), 0 0 14px rgba(56, 189, 248, 0.25);
    transform: translateY(-1px);
    color: #ffffff;
}

.workbench-hub-trigger.active,
.workbench-hub-trigger[aria-expanded="true"] {
    background: linear-gradient(135deg, rgba(14, 116, 144, 0.3), rgba(30, 41, 59, 0.95));
    border-color: rgba(56, 189, 248, 0.9);
    box-shadow: 0 0 16px rgba(56, 189, 248, 0.35), 0 2px 8px rgba(0, 0, 0, 0.5);
    color: #38bdf8;
}

.hub-trigger-icon {
    display: inline-flex;
    align-items: center;
    color: #38bdf8;
    font-size: 12px;
}

.hub-trigger-label {
    letter-spacing: 0.1px;
    white-space: nowrap;
}

.hub-chevron {
    font-size: 9px;
    color: #94a3b8;
    transition: transform 0.2s ease;
    margin-left: 2px;
}

.workbench-hub-trigger.active .hub-chevron,
.workbench-hub-trigger[aria-expanded="true"] .hub-chevron {
    transform: rotate(180deg);
    color: #38bdf8;
}

/* ─── Compact Options Dropdown Menu ────────────────────────────────────────── */
.workbench-hub-dropdown {
    position: fixed;
    top: 54px;
    width: 290px;
    max-width: calc(100vw - 20px);
    z-index: 100000;
    pointer-events: auto;
}

.hub-dropdown-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 99999;
}

.hub-dropdown-menu {
    position: relative;
    z-index: 100000;
    background: rgba(12, 18, 33, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(56, 189, 248, 0.35);
    border-radius: 10px;
    box-shadow: 0 16px 40px -4px rgba(0, 0, 0, 0.75), 0 0 16px rgba(56, 189, 248, 0.12);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: hubFadeScale 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes hubFadeScale {
    from {
        opacity: 0;
        transform: translateY(-4px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Compact Search Bar */
.hub-search-bar {
    position: relative;
    display: flex;
    align-items: center;
    padding: 7px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 23, 42, 0.6);
}

.hub-search-bar .hub-search-icon {
    position: absolute;
    left: 17px;
    font-size: 11px;
    color: #64748b;
    pointer-events: none;
}

.hub-search-bar input {
    width: 100%;
    height: 28px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(56, 189, 248, 0.22);
    border-radius: 6px;
    padding: 3px 24px 3px 26px;
    font-size: 11.5px;
    color: #f8fafc;
    outline: none;
    font-family: var(--font-sans);
    transition: all 0.16s ease;
}

.hub-search-bar input:focus {
    border-color: #38bdf8;
    background: rgba(0, 0, 0, 0.6);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.hub-search-bar .hub-search-clear {
    position: absolute;
    right: 14px;
    background: transparent;
    border: none;
    color: #94a3b8;
    font-size: 10.5px;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 3px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.hub-search-bar .hub-search-clear:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

/* Menu Items List */
.hub-menu-list {
    display: flex;
    flex-direction: column;
    padding: 4px;
    gap: 1.5px;
    max-height: 380px;
    overflow-y: auto;
}

.hub-menu-list::-webkit-scrollbar {
    width: 4px;
}

.hub-menu-list::-webkit-scrollbar-thumb {
    background: rgba(56, 189, 248, 0.25);
    border-radius: 4px;
}

.hub-menu-label {
    font-size: 9.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #64748b;
    padding: 6px 8px 3px;
}

.hub-menu-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    margin: 4px 6px;
}

.hub-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 6px;
    background: transparent;
    border: 1px solid transparent;
    color: #e2e8f0;
    cursor: pointer;
    text-align: left;
    width: 100%;
    transition: all 0.14s ease;
    font-family: var(--font-sans);
    user-select: none;
}

.hub-item:hover,
.hub-item:focus-visible,
.hub-item.hub-selected {
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.35);
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.12);
    color: #ffffff;
    outline: none;
}

.hub-item-icon {
    font-size: 11.5px;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

.hub-item-title {
    font-size: 11.5px;
    font-weight: 500;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #f1f5f9;
    flex: 1;
}

.hub-item:hover .hub-item-title {
    color: #38bdf8;
}

.hub-item-badge {
    font-size: 9px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
    padding: 1px 5px;
    border-radius: 4px;
    flex-shrink: 0;
}

.hub-item-shortcut {
    flex-shrink: 0;
}

.hub-item-shortcut kbd {
    background: rgba(56, 189, 248, 0.12);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 9px;
    font-family: var(--font-mono);
    color: #38bdf8;
    font-weight: 600;
}

/* Compact 1-line Footer */
.hub-menu-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5px 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(10, 16, 30, 0.7);
    font-size: 9.5px;
    color: #64748b;
    font-family: var(--font-mono);
}

.hub-menu-footer span {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.hub-menu-footer kbd {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 3px;
    padding: 0 3px;
    font-size: 8.5px;
    color: #cbd5e1;
}

/* ─── Segmented Dock Controller & Quick Navigation Strip ─────────────────────── */
.studio-dock-controller {
    display: inline-flex;
    align-items: center;
    background: rgba(14, 23, 42, 0.7);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 6px;
    padding: 1px 3px;
    gap: 2px;
    flex-shrink: 0;
}

.studio-options-pill-group {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 6px;
    padding: 1px 3px;
    gap: 2px;
    flex-shrink: 0;
}

.dock-ctrl-btn, .opt-dock-toggle-btn {
    border-radius: 4px !important;
    padding: 2px 6px !important;
    font-size: 10px !important;
    font-weight: 700 !important;
    height: 24px !important;
    line-height: 1 !important;
    gap: 4px !important;
    transition: all 0.15s ease;
    color: #94a3b8 !important;
    background: transparent !important;
    border: 1px solid transparent !important;
    display: inline-flex;
    align-items: center;
}

.dock-ctrl-btn.active, .opt-dock-toggle-btn.active {
    background: rgba(56, 189, 248, 0.2) !important;
    border-color: rgba(56, 189, 248, 0.5) !important;
    color: #38bdf8 !important;
}

.dock-ctrl-btn:hover, .opt-dock-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: rgba(255, 255, 255, 0.2) !important;
    color: #ffffff !important;
}

#btn-top-toggle-split {
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 2px 6px !important;
    font-size: 11px !important;
    height: 24px !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

#btn-top-toggle-split i {
    transition: all 0.2s ease;
    color: #64748b;
    font-size: 11px;
}

#btn-top-toggle-split.active {
    background: rgba(34, 197, 94, 0.22) !important;
    border-color: rgba(34, 197, 94, 0.6) !important;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.25) !important;
}

#btn-top-toggle-split.active i {
    color: #4ade80 !important;
    filter: drop-shadow(0 0 4px rgba(74, 222, 128, 0.5));
}

#btn-top-toggle-split:hover i {
    color: #4ade80 !important;
}

.studio-quick-modules {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 1px 3px;
}

.studio-quick-tools {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 1px 3px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ─── Modern Trilingual Flag Language Selector ─────────────────────────────── */
.studio-lang-flags {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 6px;
    padding: 1px 3px;
    gap: 2px;
    flex-shrink: 0;
}

.lang-flag-btn {
    border-radius: 4px !important;
    padding: 2px 5px !important;
    font-size: 10px !important;
    font-weight: 700 !important;
    height: 24px !important;
    line-height: 1 !important;
    gap: 4px !important;
    color: #94a3b8 !important;
    background: transparent !important;
    border: 1px solid transparent !important;
    display: inline-flex !important;
    align-items: center !important;
    cursor: pointer;
    transition: all 0.15s ease;
}

.lang-flag-btn .lang-flag-svg {
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
}

.lang-flag-btn .lang-flag-code {
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.lang-flag-btn:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: #ffffff !important;
}

.lang-flag-btn.active {
    background: rgba(56, 189, 248, 0.2) !important;
    border-color: rgba(56, 189, 248, 0.5) !important;
    color: #38bdf8 !important;
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.2) !important;
}

.opt-separator {
    width: 1px;
    height: 14px;
    background: rgba(255, 255, 255, 0.14);
    margin: 0 2px;
    flex-shrink: 0;
}

.opt-panel-btn {
    transition: all 0.15s ease;
    white-space: nowrap !important;
    border-radius: 4px !important;
    padding: 2px 5px !important;
    font-size: 10px !important;
    font-weight: 600 !important;
    height: 25px !important;
    gap: 3px !important;
    line-height: 1 !important;
    background: transparent;
    border: 1px solid transparent;
}

.opt-panel-btn i {
    font-size: 10px !important;
}

.opt-panel-btn:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: rgba(255, 255, 255, 0.2) !important;
    color: #ffffff !important;
}

.opt-panel-btn.active {
    background: rgba(56, 189, 248, 0.15) !important;
    border-color: rgba(56, 189, 248, 0.45) !important;
    color: #38bdf8 !important;
}

/* Pulsing highlight for navigated section */
@keyframes sectionHighlightPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.8);
        border-color: rgba(56, 189, 248, 1);
        transform: scale(1);
    }
    30% {
        box-shadow: 0 0 20px 4px rgba(56, 189, 248, 0.5);
        border-color: #38bdf8;
        transform: scale(1.01);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(56, 189, 248, 0);
        border-color: var(--border-color);
        transform: scale(1);
    }
}

.section-highlight-pulse {
    animation: sectionHighlightPulse 1.6s cubic-bezier(0.16, 1, 0.3, 1) 1;
}

.studio-brand {
    display: flex;
    align-items: center;
    gap: 5px;
    flex-shrink: 0;
    text-decoration: none;
    cursor: pointer;
}

.studio-brand-logo-wrap {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    overflow: hidden;
    background: transparent;
    transition: transform 0.2s ease;
}

.studio-brand:hover .studio-brand-logo-wrap {
    transform: scale(1.05);
}

.brand-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.brand-title {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: background 0.3s ease;
}
.studio-brand:hover .brand-title {
    background: linear-gradient(135deg, #ffffff 0%, #38bdf8 80%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-badge {
    background: rgba(255, 255, 255, 0.06);
    color: #94a3b8;
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 8.5px;
    font-weight: 700;
    padding: 1px 4px;
    border-radius: 3px;
    font-family: var(--font-mono);
    letter-spacing: 0.3px;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    height: 17px;
    line-height: 15px;
}

.nav-cross-icon {
    width: 12px;
    height: 12px;
    vertical-align: middle;
    border-radius: 2px;
    flex-shrink: 0;
}

.studio-nav-cross-links {
    padding: 1px 3px;
    gap: 2px;
}

.studio-nav-cross-links .btn-studio {
    padding: 2px 5px !important;
    font-size: 10px !important;
    height: 25px !important;
    gap: 3px !important;
    border-radius: 4px !important;
}

.studio-loader-bar {
    display: flex;
    align-items: center;
    gap: 3px;
    margin-left: 2px;
}

.loader-input-wrap {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1px 6px;
    height: 25px;
    transition: all 0.2s ease;
}

.loader-input-wrap:focus-within {
    border-color: #38bdf8;
    box-shadow: 0 0 0 1px #38bdf8;
}

.loader-input-wrap i {
    font-size: 10px;
    margin-right: 3px;
    color: #64748b;
}

.loader-input-wrap input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 700;
    width: 76px !important;
    padding: 2px 2px !important;
    height: 21px !important;
    text-transform: uppercase;
}

.loader-input-wrap input::placeholder {
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 400;
    text-transform: none;
}

.chip-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.chip-btn:hover, .chip-btn.active {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.studio-actions-bar {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-studio {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 10.5px;
    font-weight: 600;
    padding: 3px 6px;
    border-radius: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 25px;
    line-height: 1;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-studio:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.btn-studio.primary {
    background: linear-gradient(135deg, #0284c7, #0369a1);
    border: 1px solid rgba(2, 132, 199, 0.6);
    color: #fff;
    box-shadow: 0 2px 8px rgba(2, 132, 199, 0.35);
}

.btn-studio.primary:hover {
    background: linear-gradient(135deg, #0369a1, #0284c7);
    border-color: #0ea5e9;
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.5);
    transform: translateY(-1px);
}

#btn-studio-load {
    padding: 2px 7px !important;
    font-size: 10.5px !important;
    height: 25px !important;
    gap: 3px !important;
    font-weight: 600 !important;
}

#btn-studio-clear {
    padding: 2px 5px !important;
    font-size: 10px !important;
    height: 25px !important;
}

.studio-quick-tools .btn-studio {
    padding: 2px 6px !important;
    font-size: 10.5px !important;
    height: 25px !important;
    gap: 3px !important;
}

.studio-quick-tools .btn-studio i {
    font-size: 10px !important;
}

#btn-studio-goto-atom {
    padding: 2px 6px !important;
    font-size: 10.5px !important;
    height: 25px !important;
    gap: 3px !important;
    font-weight: 600 !important;
}

#btn-studio-goto-atom i {
    font-size: 10px !important;
}

.header-kbd {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 3px !important;
    padding: 0 3px !important;
    font-size: 8px !important;
    font-family: var(--font-mono);
    color: #94a3b8;
    font-weight: 600;
    line-height: 13px !important;
    height: 14px !important;
    display: inline-flex;
    align-items: center;
    margin-left: 2px !important;
}

.btn-studio.icon-only {
    padding: 2px 5px !important;
    font-size: 10.5px !important;
    height: 25px !important;
    width: 25px !important;
    justify-content: center !important;
}

.studio-lang-selector-wrap {
    padding: 1px 4px !important;
    height: 25px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 3px !important;
    background: rgba(0, 0, 0, 0.35) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    border-radius: 4px !important;
}

.studio-lang-selector-wrap i {
    font-size: 10px !important;
    color: #94a3b8;
}

.studio-lang-select {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 10px !important;
    font-weight: 700;
    cursor: pointer;
    padding: 1px 1px !important;
    height: 21px !important;
}

#badge-ligand-count {
    border-radius: 8px;
    font-size: 8.5px;
    padding: 0 3px;
    font-weight: 700;
}

.pwa-install-btn {
    padding: 2px 6px !important;
    font-size: 10.5px !important;
    height: 25px !important;
}

.pwa-standalone-badge {
    padding: 2px 6px;
    font-size: 10px;
    height: 25px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* ─── Main Studio Grid ───────────────────────────────────────────────────────── */

.studio-main {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
    width: 100%;
    min-height: 0;
}

/* Left Inspector Panel */
.studio-sidebar-left {
    width: 320px;
    min-width: 280px;
    max-width: 340px;
    flex-shrink: 0;
    background: linear-gradient(180deg, rgba(12, 21, 37, 0.98) 0%, rgba(10, 17, 32, 0.98) 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.07);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 12px;
    gap: 10px;
    z-index: 10;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), width 0.3s ease, margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
}

.studio-main.collapsed-left .studio-sidebar-left {
    margin-left: -340px;
    width: 0;
    min-width: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}

/* Right Measurements Panel */
.studio-sidebar-right {
    width: 320px;
    min-width: 280px;
    max-width: 340px;
    flex-shrink: 0;
    background: linear-gradient(180deg, rgba(12, 21, 37, 0.98) 0%, rgba(10, 17, 32, 0.98) 100%);
    border-left: 1px solid rgba(255, 255, 255, 0.07);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 12px;
    gap: 10px;
    z-index: 10;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), width 0.3s ease, margin-right 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
}

.studio-main.collapsed-right .studio-sidebar-right {
    margin-right: -340px;
    width: 0;
    min-width: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}

/* Header Keyboard Badges */
.header-kbd {
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 9px;
    font-family: var(--font-mono);
    color: #94a3b8;
    margin-left: 4px;
}

/* Drawer Headers & Mobile Close Controls */
.mobile-only {
    display: none !important;
}

@media screen and (max-width: 1024px) {
    .mobile-only {
        display: flex !important;
    }
}

.sidebar-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin: -12px -12px 10px -12px;
    background: rgba(15, 23, 42, 0.96);
    position: sticky;
    top: -12px;
    z-index: 25;
}

.drawer-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary, #f8fafc);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.3px;
}

.btn-close-drawer {
    width: 32px !important;
    height: 32px !important;
    min-height: 32px !important;
    padding: 0 !important;
    border-radius: 6px !important;
    background: rgba(255, 255, 255, 0.06) !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    color: #94a3b8 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    transition: all 0.2s ease;
}
.btn-close-drawer:hover {
    background: rgba(239, 68, 68, 0.25) !important;
    color: #ef4444 !important;
    border-color: rgba(239, 68, 68, 0.5) !important;
}

/* Studio Drawer Overlay Backdrop for Mobile & Tablet */
.studio-drawer-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(4, 9, 20, 0.68);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1040;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
}

@media screen and (max-width: 1024px) {
    .studio-drawer-backdrop.active {
        display: block;
        opacity: 1;
        pointer-events: auto;
    }
}

/* Floating Dock Buttons */
.floating-dock-btn {
    position: absolute;
    z-index: 15;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #94a3b8;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
}

.floating-dock-btn:hover {
    background: #1e293b;
    border-color: #64748b;
    color: #fff;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
}

.floating-dock-btn.dock-left {
    top: 50%;
    left: 10px;
    transform: translateY(-50%);
    width: 32px;
    height: 36px;
}
.floating-dock-btn.dock-left:hover {
    transform: translateY(-50%) scale(1.15);
}

.floating-dock-btn.dock-right {
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    width: 32px;
    height: 36px;
}
.floating-dock-btn.dock-right:hover {
    transform: translateY(-50%) scale(1.15);
}

.floating-dock-btn.dock-bottom {
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 42px;
    height: 28px;
    font-size: 11px;
}
.floating-dock-btn.dock-bottom:hover {
    transform: translateX(-50%) scale(1.15);
}

/* Zen Fullscreen Mode */
body.zen-mode .studio-header {
    margin-top: -65px;
    opacity: 0;
    pointer-events: none;
    transition: margin-top 0.3s ease, opacity 0.2s ease;
}
body.zen-mode .studio-sequence-footer {
    margin-bottom: -160px;
    opacity: 0;
    pointer-events: none;
    transition: margin-bottom 0.3s ease, opacity 0.2s ease;
}
body.zen-mode .studio-main .studio-sidebar-left {
    margin-left: -340px;
    width: 0;
    min-width: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}
body.zen-mode .studio-main .studio-sidebar-right {
    margin-right: -340px;
    width: 0;
    min-width: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}

/* Central 3D Canvas */
.studio-viewport-center {
    flex: 1 1 0%;
    min-width: 0;
    position: relative;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(ellipse at 25% 25%, rgba(6, 182, 212, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 75% 75%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
        radial-gradient(circle at center, #1a2540 0%, #090d16 100%);
    overflow: hidden;
    container-type: inline-size;
    container-name: viewport;
}

#studio-3dmol-canvas {
    flex: 1;
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
}

/* ─── Inspector Section Modules ─────────────────────────────────────────────── */

.studio-section {
    background: linear-gradient(145deg, rgba(20, 30, 52, 0.85), rgba(15, 25, 45, 0.75));
    border-radius: var(--radius-md);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.09);
    padding: 12px 14px;
    margin-bottom: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.studio-section:hover {
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: 0 8px 20px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255, 255, 255, 0.07);
    transform: translateY(-1px);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    cursor: pointer;
    user-select: none;
    padding: 3px 6px;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease, color 0.15s ease;
}

.section-header:hover {
    background: rgba(255, 255, 255, 0.05);
}

.section-collapse-chevron {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    margin-left: 6px;
    font-size: 10px;
    color: var(--text-muted);
    transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1), color 0.15s ease;
}

.section-header:hover .section-collapse-chevron {
    color: #cbd5e1;
}

.studio-section.collapsed {
    padding-top: 7px;
    padding-bottom: 7px;
    margin-bottom: 6px;
    background: rgba(15, 23, 42, 0.65);
    border-color: rgba(255, 255, 255, 0.08);
}

.studio-section.collapsed .section-header {
    margin-bottom: 0;
}

.studio-section.collapsed .section-collapse-chevron {
    transform: rotate(-90deg);
}

.studio-section.collapsed > *:not(.section-header) {
    display: none !important;
}

/* ── Ultra-Sleek Scrollbars for Laptop / Desktop Displays ── */
.studio-sidebar-left::-webkit-scrollbar,
.studio-sidebar-right::-webkit-scrollbar,
.pair-list-wrap::-webkit-scrollbar,
.active-measure-list::-webkit-scrollbar,
#studio-refinement-block::-webkit-scrollbar,
.studio-main::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

.studio-sidebar-left::-webkit-scrollbar-track,
.studio-sidebar-right::-webkit-scrollbar-track,
.pair-list-wrap::-webkit-scrollbar-track,
.active-measure-list::-webkit-scrollbar-track,
#studio-refinement-block::-webkit-scrollbar-track,
.studio-main::-webkit-scrollbar-track {
    background: transparent;
}

.studio-sidebar-left::-webkit-scrollbar-thumb,
.studio-sidebar-right::-webkit-scrollbar-thumb,
.pair-list-wrap::-webkit-scrollbar-thumb,
.active-measure-list::-webkit-scrollbar-thumb,
#studio-refinement-block::-webkit-scrollbar-thumb,
.studio-main::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

.studio-sidebar-left::-webkit-scrollbar-thumb:hover,
.studio-sidebar-right::-webkit-scrollbar-thumb:hover,
.pair-list-wrap::-webkit-scrollbar-thumb:hover,
.active-measure-list::-webkit-scrollbar-thumb:hover,
#studio-refinement-block::-webkit-scrollbar-thumb:hover,
.studio-main::-webkit-scrollbar-thumb:hover {
    background: rgba(56, 189, 248, 0.5);
}

.section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: #e2e8f0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.section-title i {
    color: #94a3b8;
}

.section-badge {
    background: rgba(255, 255, 255, 0.07);
    font-size: 10px;
    font-family: var(--font-mono);
    padding: 2px 7px;
    border-radius: 4px;
    color: var(--accent-cyan);
    border: 1px solid rgba(6, 182, 212, 0.2);
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* Pair Select & Card List */
.pair-list-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 160px;
    overflow-y: auto;
}

.pair-card-item {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 12px;
}

.pair-card-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.18);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.pair-card-item.active {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(37, 51, 72, 0.9));
    border-color: rgba(100, 116, 139, 0.6);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.pair-card-top {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    color: #fff;
    margin-bottom: 3px;
}

.pair-card-bottom {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Protonation Model Pills */
.pill-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.studio-pill {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 7px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all 0.2s;
}

.studio-pill:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* ─── Operational Controls Active State (Neutral, Clean Slate) ──────────── */
.studio-pill.active {
    background: linear-gradient(135deg, #1e293b, #253348);
    border-color: #475569;
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.studio-pill.active i {
    color: #e2e8f0;
}

/* ─── Scientific Parameters: Protonation Models (Acid-Base Chemistry) ───── */
.studio-pill#pill-anionic.active {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.55);
    color: #fca5a5;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.3), inset 0 1px 0 rgba(239, 68, 68, 0.1);
}
.studio-pill#pill-anionic.active i {
    color: #ef4444;
}

.studio-pill#pill-ash.active {
    background: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.55);
    color: #67e8f9;
    box-shadow: 0 0 12px rgba(6, 182, 212, 0.3), inset 0 1px 0 rgba(6, 182, 212, 0.1);
}
.studio-pill#pill-ash.active i {
    color: #06b6d4;
}

.studio-pill#pill-glh.active {
    background: rgba(34, 197, 94, 0.15);
    border-color: rgba(34, 197, 94, 0.55);
    color: #86efac;
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.3), inset 0 1px 0 rgba(34, 197, 94, 0.1);
}
.studio-pill#pill-glh.active i {
    color: #22c55e;
}

.studio-pill#pill-lbhb.active {
    background: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.55);
    color: #fcd34d;
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.3), inset 0 1px 0 rgba(245, 158, 11, 0.1);
}
.studio-pill#pill-lbhb.active i {
    color: #f59e0b;
}

/* ─── Scientific Parameters: Electron Density Map Channels ──────────────── */
.studio-pill#btn-studio-2fofc.active {
    background: rgba(56, 189, 248, 0.15);
    border-color: rgba(56, 189, 248, 0.6);
    color: #38bdf8;
    box-shadow: 0 0 14px rgba(56, 189, 248, 0.35);
}

.studio-pill#btn-studio-fofc-pos.active {
    background: rgba(74, 222, 128, 0.15);
    border-color: rgba(74, 222, 128, 0.6);
    color: #4ade80;
    box-shadow: 0 0 14px rgba(74, 222, 128, 0.3);
}

.studio-pill#btn-studio-fofc-neg.active {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.6);
    color: #ef4444;
    box-shadow: 0 0 14px rgba(239, 68, 68, 0.3);
}

#btn-studio-trimap.active {
    background: linear-gradient(135deg, #1e293b, #253348);
    border-color: #475569;
    color: #f8fafc;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Density Map Sliders */
.density-control-row {
    margin-bottom: 10px;
}

.density-control-label {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.density-slider-studio {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
    outline: none;
}

.density-slider-studio::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-cyan);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(6, 182, 212, 0.8);
}

.density-slider-studio.pos::-webkit-slider-thumb {
    background: #22c55e;
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.8);
}
.density-slider-studio.pos::-moz-range-thumb {
    background: #22c55e;
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.8);
}

.density-slider-studio.neg::-webkit-slider-thumb {
    background: #ef4444;
    box-shadow: 0 0 6px rgba(239, 68, 68, 0.8);
}
.density-slider-studio.neg::-moz-range-thumb {
    background: #ef4444;
    box-shadow: 0 0 6px rgba(239, 68, 68, 0.8);
}

/* Crystallographic 3D Measurements */
.measure-header-actions {
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-measure-action {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-measure-action:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

.btn-measure-action.danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
}

.btn-measure-action.active {
    background: rgba(168, 85, 247, 0.35) !important;
    border-color: rgba(168, 85, 247, 0.8) !important;
    color: #f5f3ff !important;
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.5);
}

.metal-site-pill {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.metal-site-pill:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.3);
}

.metal-site-pill.selected {
    border-width: 1.5px !important;
    background: rgba(30, 41, 59, 0.95) !important;
    box-shadow: 0 0 10px currentColor !important;
}

.measure-tabs,
.measure-mode-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
}

.measure-tab {
    flex: 1;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 7px 4px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.measure-tab:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.measure-tab.active,
.measure-tab[data-mode="dist"].active,
.measure-tab[data-mode="angle"].active,
.measure-tab[data-mode="dihedral"].active {
    background: #1e293b;
    border-color: #475569;
    color: #fff;
    box-shadow: none;
}

.measure-hint-box {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.measure-hint-box:hover {
    border-color: rgba(255, 255, 255, 0.16);
    background: rgba(15, 23, 42, 0.85);
}

.measure-hint-icon {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.06);
    color: #94a3b8;
    font-size: 11px;
    flex-shrink: 0;
    margin-top: 1px;
    box-shadow: none;
}

#studio-measure-hint {
    font-size: 11.5px;
    color: #cbd5e1;
    line-height: 1.45;
    font-weight: 500;
}

.measure-presets {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.measure-preset-chip {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 600;
    padding: 3px 7px;
    border-radius: 5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.measure-preset-chip:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.28);
    transform: translateY(-1px);
}

.measure-preset-chip.active-preset {
    background: #1e293b;
    border-color: #475569;
    color: #fff;
    box-shadow: none;
}

.active-measure-list {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 180px;
    overflow-y: auto;
}

.measure-card-item {
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 11px;
    transition: all 0.2s ease;
}

.measure-card-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.measure-card-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: 4px;
    text-transform: uppercase;
}

.measure-card-badge.dist {
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-cyan);
    border: 1px solid rgba(6, 182, 212, 0.35);
}

.measure-card-badge.angle {
    background: rgba(168, 85, 247, 0.2);
    color: var(--accent-purple);
    border: 1px solid rgba(168, 85, 247, 0.35);
}

.measure-card-badge.dihedral {
    background: rgba(244, 63, 94, 0.2);
    color: #fb7185;
    border: 1px solid rgba(244, 63, 94, 0.35);
}

.measure-card-val {
    font-family: var(--font-mono);
    font-weight: 700;
    color: #fff;
    font-size: 11.5px;
}

.measure-card-atoms {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 130px;
}

.measure-card-del {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 10px;
    transition: all 0.2s ease;
}

.measure-card-del:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
}

.measure-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
    font-family: var(--font-mono);
}

.measure-table th {
    text-align: left;
    color: var(--text-muted);
    padding: 4px 6px;
    border-bottom: 1px solid var(--border-color);
}

.measure-table td {
    padding: 5px 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* ─── Bottom Sequence Navigator Ribbon ──────────────────────────────────────── */

/* ─── Bottom Multi-Chain Sequence Navigator Ribbon ─────────────────────────── */

.studio-sequence-ribbon {
    height: 72px;
    background: linear-gradient(180deg, rgba(8, 13, 24, 0.98) 0%, rgba(10, 15, 28, 0.99) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 12px;
    z-index: 50;
    overflow: hidden;
}

.seq-toolbar-left {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
    padding-right: 12px;
}

.seq-chain-nav-wrap {
    display: flex;
    align-items: center;
    gap: 4px;
    max-width: 380px;
}

.seq-chain-quick-select {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--border-color);
    color: var(--accent-cyan);
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-mono);
    padding: 3px 6px;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.seq-chain-quick-select:hover {
    border-color: var(--accent-cyan);
    background: rgba(15, 23, 42, 0.95);
}

.seq-chain-scroll-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 20px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    cursor: pointer;
    font-size: 10px;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.seq-chain-scroll-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: var(--accent-cyan);
}

.seq-chain-tabs {
    display: flex;
    gap: 4px;
    align-items: center;
    max-width: 420px;
    overflow-x: auto;
    scrollbar-width: none;
    scroll-behavior: smooth;
}

.seq-chain-tabs::-webkit-scrollbar {
    display: none;
}

.seq-chain-tab {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-mono);
    cursor: pointer;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
}

.seq-chain-tab:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.seq-chain-tab.active {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.3), rgba(59, 130, 246, 0.3));
    border-color: var(--accent-cyan);
    color: #fff;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.35);
}

.chain-badge {
    display: inline-block;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 9px;
    font-weight: 800;
    line-height: 1.1;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.chain-badge.protein {
    background: rgba(52, 211, 153, 0.2);
    color: #34d399;
    border: 1px solid rgba(52, 211, 153, 0.45);
}

.chain-badge.rna {
    background: rgba(56, 189, 248, 0.2);
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.45);
}

.chain-badge.dna {
    background: rgba(168, 85, 247, 0.2);
    color: #c084fc;
    border: 1px solid rgba(168, 85, 247, 0.45);
}

.seq-filter-group {
    display: flex;
    gap: 4px;
    align-items: center;
}

.seq-filter-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
}

.seq-filter-btn:hover {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
}

.seq-filter-btn.active {
    background: rgba(167, 139, 250, 0.2);
    border-color: var(--accent-purple);
    color: #c4b5fd;
}

.seq-jump-wrap {
    display: none;
}

.seq-meta-stats {
    display: flex;
    gap: 8px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.seq-residues-container {
    display: flex;
    align-items: center;
    gap: 3px;
    overflow-x: auto;
    padding: 6px 0;
    height: 100%;
    flex: 1;
    scrollbar-width: thin;
}

.seq-item {
    width: 24px;
    height: 52px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    font-family: var(--font-mono);
    padding: 3px 0;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    flex-shrink: 0;
}

.seq-item:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

/* Biochemical Amino Acid Color System */
.seq-item.acidic {
    background: rgba(236, 72, 153, 0.12);
    border-color: rgba(236, 72, 153, 0.45);
    color: #f472b6;
}

.seq-item.asp {
    background: rgba(52, 211, 153, 0.16);
    border-color: rgba(52, 211, 153, 0.55);
    color: #34d399;
}

.seq-item.glu {
    background: rgba(167, 139, 250, 0.16);
    border-color: rgba(167, 139, 250, 0.55);
    color: #a78bfa;
}

.seq-item.basic {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.4);
    color: #60a5fa;
}

.seq-item.polar {
    background: rgba(20, 184, 166, 0.12);
    border-color: rgba(20, 184, 166, 0.4);
    color: #2dd4bf;
}

.seq-item.hydrophobic {
    background: rgba(245, 158, 11, 0.10);
    border-color: rgba(245, 158, 11, 0.35);
    color: #fbbf24;
}

.seq-item.aromatic {
    background: rgba(139, 92, 246, 0.12);
    border-color: rgba(139, 92, 246, 0.4);
    color: #c084fc;
}

.seq-item.special {
    background: rgba(148, 163, 184, 0.08);
    border-color: rgba(148, 163, 184, 0.3);
    color: #cbd5e1;
}

.seq-item.nucleic-rna {
    background: rgba(56, 189, 248, 0.16);
    border-color: rgba(56, 189, 248, 0.55);
    color: #38bdf8;
}

.seq-item.nucleic-dna {
    background: rgba(168, 85, 247, 0.16);
    border-color: rgba(168, 85, 247, 0.55);
    color: #c084fc;
}

.seq-item.active-pair {
    background: rgba(245, 158, 11, 0.40) !important;
    border-color: var(--accent-amber) !important;
    color: #fff !important;
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.8) !important;
    font-weight: 800 !important;
    transform: translateY(-2px);
}

.seq-letter {
    font-size: 11px;
    font-weight: 800;
}

.seq-num {
    font-size: 8px;
    color: var(--text-muted);
}


/* ─── Viewport HUD Info Strip ──────────────────────────────────────────────── */

.viewport-hud-strip {
    position: absolute;
    bottom: 10px;
    left: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    z-index: 10;
    pointer-events: none;
}

.hud-pill {
    pointer-events: auto;
    background: rgba(9, 13, 22, 0.78);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.09);
    padding: 4px 9px;
    border-radius: 6px;
    font-size: 11px;
    font-family: var(--font-ui);
    color: #e2e8f0;
    display: flex;
    align-items: center;
    gap: 5px;
    line-height: 1;
    box-shadow: 0 2px 8px rgba(0,0,0,0.45);
}

/* Atom Pick Status Badge — shown top-right of viewport when picking atoms */
.hud-pick-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(9, 13, 22, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(245, 158, 11, 0.45);
    border-radius: 6px;
    padding: 5px 10px;
    color: #fde68a;
    font-family: var(--font-mono);
    font-size: 11px;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 10;
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.2);
    pointer-events: none;
}

.overlay-pill {
    pointer-events: auto;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-family: var(--font-mono);
    color: #fff;
    display: flex;
    align-items: center;
    gap: 6px;
}

.overlay-pill strong {
    color: var(--accent-cyan);
}

/* ─── Viewport Control Toolbar (right side, vertical strip) ──────────────── */

.viewport-ctrl-toolbar {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    z-index: 10;
    pointer-events: none; /* toolbar itself transparent */
}

.vp-ctrl-btn {
    pointer-events: auto;
    width: 30px;
    height: 30px;
    background: rgba(9, 13, 22, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 7px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    outline: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.vp-ctrl-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff;
    transform: scale(1.06);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.vp-ctrl-btn:active {
    transform: scale(0.95);
}

.vp-ctrl-btn.active {
    background: rgba(56, 189, 248, 0.22) !important;
    border-color: rgba(56, 189, 248, 0.6) !important;
    color: #38bdf8 !important;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.3) !important;
}

.vp-ctrl-help-btn {
    color: #94a3b8;
    border-color: rgba(255, 255, 255, 0.12);
}

.vp-ctrl-help-btn:hover,
.vp-ctrl-help-btn.active {
    background: #1e293b !important;
    border-color: #475569 !important;
    color: #fff !important;
    box-shadow: none !important;
}

.vp-ctrl-divider {
    width: 18px;
    height: 1px;
    background: rgba(255,255,255,0.12);
    margin: 2px 0;
}

/* ─── Mouse / Keyboard Help Overlay ──────────────────────────────────────── */

.vp-help-overlay {
    position: absolute;
    top: 10px;
    right: 48px; /* sits to the left of the toolbar */
    width: 240px;
    background: rgba(7, 11, 20, 0.94);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.65), 0 0 20px rgba(6, 182, 212, 0.1);
    z-index: 11;
    overflow: hidden;
    pointer-events: auto;
    animation: helpSlideIn 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes helpSlideIn {
    from { opacity: 0; transform: translateX(10px) scale(0.97); }
    to   { opacity: 1; transform: translateX(0) scale(1); }
}

.vp-help-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px 8px;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    font-size: 12px;
    font-weight: 700;
    color: #e2e8f0;
    letter-spacing: 0.3px;
    background: rgba(6, 182, 212, 0.08);
}

.vp-help-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 13px;
    padding: 2px 4px;
    border-radius: 4px;
    transition: color 0.15s, background 0.15s;
    outline: none;
}

.vp-help-close:hover {
    color: #fff;
    background: rgba(255,255,255,0.1);
}

.vp-help-body {
    padding: 10px 12px 12px;
}

.vp-help-section-title {
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-cyan);
    margin-bottom: 6px;
}

.vp-help-row {
    display: grid;
    grid-template-columns: 100px 1fr;
    align-items: center;
    gap: 6px;
    padding: 3px 0;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.vp-help-row:last-child {
    border-bottom: none;
}

.vp-help-key {
    font-size: 10px;
    font-family: var(--font-ui);
    color: #94a3b8;
    display: flex;
    align-items: center;
    gap: 4px;
}

.vp-help-key i {
    font-size: 9px;
    color: #64748b;
}

.vp-help-key kbd {
    display: inline-block;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 9.5px;
    font-family: var(--font-mono);
    color: #e2e8f0;
    box-shadow: 0 1px 0 rgba(255,255,255,0.1);
    line-height: 1.4;
}

.vp-help-desc {
    font-size: 10px;
    color: #cbd5e1;
    font-family: var(--font-ui);
}

/* Measurement mode: crosshair cursor on canvas */
#studio-3dmol-canvas.measuring-mode {
    cursor: crosshair;
}


/* Toast Notifications */
.studio-toast {
    position: fixed;
    bottom: 80px;
    right: 20px;
    background: rgba(10, 16, 30, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(6, 182, 212, 0.1);
    z-index: 999;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: toastSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

@keyframes toastSlideIn {
    from { transform: translateX(60px) scale(0.95); opacity: 0; }
    to { transform: translateX(0) scale(1); opacity: 1; }
}

/* ─── Studio Empty Welcome State ─────────────────────────────────────────── */

.studio-empty-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at center, rgba(20, 30, 50, 0.92) 0%, rgba(8, 12, 21, 0.98) 100%);
    z-index: 15;
    padding: 24px;
    text-align: center;
    transition: opacity 0.3s ease;
    overflow-y: auto;
}

.empty-state-card {
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(10, 16, 30, 0.98));
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 32px 36px;
    box-shadow:
        0 24px 60px rgba(0, 0, 0, 0.75),
        0 0 0 1px rgba(6, 182, 212, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 580px;
    width: 100%;
    position: relative;
    overflow: hidden;
}
.empty-state-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.4), rgba(139, 92, 246, 0.3), transparent);
    pointer-events: none;
}

.empty-brand-icon {
    width: 140px;
    height: 140px;
    margin: 0 auto 12px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    overflow: hidden;
    background: transparent;
    border: none;
    filter: drop-shadow(0 0 24px rgba(6, 182, 212, 0.45));
    animation: pulseLogoGlow 3.5s infinite ease-in-out;
}

@keyframes pulseLogoGlow {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 18px rgba(6, 182, 212, 0.4)); }
    50% { transform: scale(1.04); filter: drop-shadow(0 0 28px rgba(34, 211, 238, 0.75)); }
}

.empty-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.empty-title {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 6px 0;
    letter-spacing: -0.5px;
}

.empty-desc {
    font-size: 12.5px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 18px 0;
}

.empty-fetch-row {
    display: flex;
    gap: 8px;
    width: 100%;
    max-width: 460px;
    margin-bottom: 12px;
}

.empty-input-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 12px;
    flex: 1;
    transition: border-color 0.2s;
}

.empty-input-wrap:focus-within {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

.empty-input-wrap input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-size: 13px;
    font-family: var(--font-mono);
    width: 100%;
    padding: 9px 0;
}

.empty-input-wrap input::placeholder {
    color: var(--text-muted);
}

.empty-dropzone-hint {
    font-size: 11.5px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: rgba(6, 182, 212, 0.04);
    border: 1.5px dashed rgba(6, 182, 212, 0.35);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    width: 100%;
    max-width: 480px;
    margin-bottom: 16px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.empty-dropzone-hint:hover {
    background: rgba(6, 182, 212, 0.12);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 4px 18px rgba(6, 182, 212, 0.25);
}

.empty-dropzone-hint.drag-active {
    background: rgba(6, 182, 212, 0.22) !important;
    border-color: #22d3ee !important;
    border-style: solid !important;
    box-shadow: 0 0 24px rgba(34, 211, 238, 0.6) !important;
    transform: scale(1.02);
}

.empty-dropzone-hint code {
    background: rgba(255, 255, 255, 0.08);
    padding: 1px 4px;
    border-radius: 3px;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

.btn-sample-chip {
    transition: all 0.2s ease;
}

.btn-sample-chip:hover {
    background: rgba(6, 182, 212, 0.2) !important;
    border-color: var(--accent-cyan) !important;
    transform: translateY(-1px);
}

/* ─── Scientific Citation & Authors Card ─────────────────────────────────── */

.empty-author-reference-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    width: 100%;
    text-align: left;
}

.author-reference-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-amber);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-bottom: 6px;
}

.authors-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 10px;
}

@media (max-width: 600px) {
    .authors-grid {
        grid-template-columns: 1fr;
    }
}

.author-item {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    flex-shrink: 0;
    margin-top: 2px;
}

.author-avatar.mrc {
    background: rgba(167, 139, 250, 0.15);
    color: var(--accent-purple);
}

.author-info {
    display: flex;
    flex-direction: column;
    font-size: 11px;
    line-height: 1.35;
}

.author-info strong {
    color: #fff;
    font-size: 11.5px;
}

.author-affil {
    color: var(--text-secondary);
    font-size: 10px;
}

.author-dept {
    color: var(--text-muted);
    font-size: 9.5px;
}

.reference-publication-row {
    display: flex;
    gap: 6px;
    font-size: 10.5px;
    color: #cbd5e1;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 8px;
    line-height: 1.4;
}

.ref-text {
    font-style: italic;
    color: #94a3b8;
}

/* ─── Sequence Ribbon Stepper Controls ───────────────────────────────────── */

.seq-top-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.seq-bottom-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.seq-stepper-wrap {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1px;
}

.seq-step-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 3px 6px;
    font-size: 10px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.15s;
}

.seq-step-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.seq-step-input-wrap input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    width: 60px;
    text-align: center;
    padding: 2px 0;
}

.seq-step-input-wrap input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

/* ─── Enterprise "Go to Atom" Navigator Modal Dialog ─────────────────────── */

.studio-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: modalFadeIn 0.2s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.goto-atom-card {
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 620px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 20px rgba(6, 182, 212, 0.2);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalSlideUp 0.25s ease;
}

@keyframes modalSlideUp {
    from { transform: translateY(20px) scale(0.97); }
    to { transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
}

.modal-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-title {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
}

.modal-hotkey {
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.15s;
}

.modal-close-btn:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.modal-body {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.goto-grid {
    display: flex;
    gap: 10px;
}

.goto-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.goto-field label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.goto-select {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-family: var(--font-mono);
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.goto-select:focus {
    border-color: var(--accent-cyan);
}

.goto-search-wrap {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 10px;
}

.goto-search-wrap:focus-within {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.25);
}

.goto-search-wrap input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-size: 12px;
    font-family: var(--font-mono);
    padding: 8px 0;
    width: 100%;
}

.goto-res-list-container {
    max-height: 160px;
    overflow-y: auto;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 4px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 4px;
}

.goto-res-item {
    padding: 6px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: #cbd5e1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.12s;
}

.goto-res-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.goto-res-item.selected {
    background: #1e293b;
    border-color: #64748b;
    color: #fff;
    font-weight: 700;
}

.goto-preview-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.goto-preview-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.goto-preview-row strong {
    color: #fff;
}

.goto-meta-row {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 6px;
}

.goto-meta-row strong {
    color: #cbd5e1;
}

.modal-actions-row {
    display: flex;
    gap: 10px;
    margin-top: 4px;
}

/* ─── Language Selector ─────────────────────────────────────────────────────── */
.studio-lang-selector-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 3px 8px;
    transition: all 0.2s ease;
}

.studio-lang-selector-wrap:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

.studio-lang-select {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 11.5px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-sans);
}

.studio-lang-select option {
    background: #0f172a;
    color: #fff;
    padding: 6px;
}

/* ─── RTL (Hebrew - עברית) Layout Adaptations ─────────────────────────────── */
html[dir="rtl"] body {
    direction: rtl;
    text-align: right;
}

html[dir="rtl"] .studio-actions-bar {
    margin-right: auto;
    margin-left: 0;
}

html[dir="rtl"] .section-header .section-badge,
html[dir="rtl"] .goto-meta-row,
html[dir="rtl"] .seq-meta-stats {
    direction: ltr;
}

html[dir="rtl"] .seq-stepper-wrap {
    flex-direction: row-reverse;
}

html[dir="rtl"] .measure-table th,
html[dir="rtl"] .measure-table td {
    text-align: right;
}

html[dir="rtl"] pre,
html[dir="rtl"] code,
html[dir="rtl"] .font-mono,
html[dir="rtl"] #studio-refinement-block,
html[dir="rtl"] #modal-refine-code-block,
html[dir="rtl"] .overlay-pill,
html[dir="rtl"] .goto-preview-card code {
    direction: ltr;
    text-align: left;
}

/* ─── Crystallographic Refinement & Restraints Suite ──────────────────────── */
.refine-tab {
    transition: all 0.2s ease;
}

.refine-tab:hover {
    background: rgba(255, 255, 255, 0.08) !important;
    color: #fff !important;
}

.refine-tab.active {
    background: rgba(6, 182, 212, 0.18) !important;
    border-color: var(--accent-cyan) !important;
    color: #fff !important;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.25);
}

.refine-modal-card {
    width: 100%;
    max-width: 780px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(6, 182, 212, 0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalScaleIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}



.modal-refine-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.modal-tab {
    flex: 1;
    padding: 8px 12px;
    font-size: 11.5px;
    font-weight: 700;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.modal-tab:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.modal-tab.active {
    background: #1e293b;
    border: 1px solid #475569;
    color: #fff;
    box-shadow: none;
}

.refine-params-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 14px;
}

@media (max-width: 768px) {
    .refine-params-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.refine-param-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.refine-param-item label {
    font-size: 10.5px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.refine-param-item input,
.refine-param-item select {
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    color: #fff;
    font-size: 12px;
    font-family: var(--font-mono);
    outline: none;
    transition: border-color 0.2s ease;
}

.refine-param-item input:focus,
.refine-param-item select:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.25);
}

.refine-param-item select option {
    background: #0f172a;
    color: #fff;
}

.refine-preview-container {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.refine-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border-color);
    font-size: 11px;
}

.refine-preview-actions {
    display: flex;
    gap: 6px;
}

#modal-refine-code-block {
    margin: 0;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.5;
    color: #c4b5fd;
    max-height: 280px;
    overflow-y: auto;
    white-space: pre-wrap;
    background: transparent;
}

/* ─── Launch Refinement Suite Button ─────────────────────────────────────── */
.refine-launch-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    margin-top: 6px;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    text-align: left;
}

.refine-launch-btn:hover {
    background: #334155;
    border-color: #475569;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
    transform: translateY(-1px);
}

.refine-launch-btn:active {
    transform: translateY(0);
}

.refine-launch-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 7px;
    font-size: 13px;
    color: #cbd5e1;
}

.refine-launch-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex: 1;
    min-width: 0;
}

.refine-launch-title {
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.refine-launch-sub {
    font-size: 9.5px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.refine-launch-arrow {
    flex-shrink: 0;
    font-size: 10px;
    color: var(--accent-cyan);
    opacity: 0.7;
    transition: opacity 0.2s, transform 0.2s;
}

.refine-launch-btn:hover .refine-launch-arrow {
    opacity: 1;
    transform: translate(2px, -2px);
}

/* ─── Suite Badge Indicators ──────────────────────────────────────────────── */
.refine-suite-badges {
    display: flex;
    gap: 5px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.rsuite-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.03em;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    cursor: default;
    opacity: 0.6;
}

.rsuite-badge.active {
    opacity: 1;
}

.rsuite-badge.rsuite-xray {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.4);
    color: #fbbf24;
}

.rsuite-badge.rsuite-xray.active {
    background: rgba(245, 158, 11, 0.2);
    box-shadow: 0 0 8px rgba(245, 158, 11, 0.25);
}

.rsuite-badge.rsuite-cryoem {
    background: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.4);
    color: var(--accent-cyan);
}

.rsuite-badge.rsuite-cryoem.active {
    background: rgba(6, 182, 212, 0.2);
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.25);
}

.rsuite-badge.rsuite-pipeline {
    background: rgba(168, 85, 247, 0.1);
    border-color: rgba(168, 85, 247, 0.4);
    color: #c084fc;
}

.rsuite-badge.rsuite-pipeline.active {
    background: rgba(168, 85, 247, 0.2);
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.25);
}

/* ─── Responsive Media Queries ─────────────────────────────────────────────── */


@media (max-width: 1400px) {
    .studio-sidebar-left {
        width: 300px;
        min-width: 270px;
    }
    .studio-sidebar-right {
        width: 300px;
        min-width: 270px;
    }
}

@media (max-width: 1200px) {
    .studio-sidebar-left {
        width: 280px;
        min-width: 250px;
    }
    .studio-sidebar-right {
        width: 280px;
        min-width: 250px;
    }
    .loader-input-wrap input {
        width: 140px;
    }
}

@media (max-width: 980px) {
    .studio-sequence-ribbon {
        height: auto;
        min-height: auto;
        flex-direction: column;
        padding: 8px 12px;
        gap: 6px;
    }
    .seq-ribbon-header {
        flex-wrap: wrap;
    }
    .seq-bottom-controls {
        flex-wrap: wrap;
        gap: 6px;
    }
}

@media (max-width: 640px) {
    .studio-header {
        padding: 8px 10px;
    }
    .studio-brand .brand-title {
        font-size: 13px;
    }
    .loader-input-wrap input {
        width: 110px;
        font-size: 11px;
    }
    .btn-studio {
        padding: 5px 8px;
        font-size: 11px;
    }
}

/* ─── Automated Geometric Signatures Grid ─────────────────────────────────── */

.geom-telemetry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 4px;
}

.geom-telemetry-card {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    transition: all 0.2s ease;
}

.geom-telemetry-card:hover {
    border-color: rgba(6, 182, 212, 0.4);
    background: rgba(15, 23, 42, 0.85);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.geom-telemetry-card.full-span {
    grid-column: span 2;
}

.geom-telemetry-label {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.geom-telemetry-val {
    font-size: 14px;
    font-family: var(--font-mono);
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.2px;
}

.geom-telemetry-val.highlight-dist {
    color: var(--accent-amber);
    text-shadow: 0 0 10px rgba(245, 158, 11, 0.35);
}

.geom-telemetry-val.highlight-dihedral {
    color: #f43f5e;
    text-shadow: 0 0 10px rgba(244, 63, 94, 0.35);
}

.geom-telemetry-sub {
    font-size: 9.5px;
    color: #64748b;
    font-family: var(--font-mono);
}

.geom-telemetry-sidechains {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
}

.geom-chi-tag {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
}

/* ─── Keyboard Shortcuts Modal Dialog ─────────────────────────────────────── */

.shortcuts-modal-card {
    max-width: 680px;
    width: 90%;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(6, 182, 212, 0.35);
    border-radius: 12px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8), 0 0 30px rgba(6, 182, 212, 0.2);
}

.shortcuts-modal-body {
    padding: 16px 20px 24px;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 16px;
}

.shortcuts-col h4 {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 11px;
    color: #cbd5e1;
    gap: 8px;
}

.shortcut-item kbd {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 0 rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--accent-amber);
    flex-shrink: 0;
}

/* ─── Electron Density Deck Styles ────────────────────────────────────────── */

.density-focus-card {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(56, 189, 248, 0.28);
    border-radius: 6px;
    padding: 7px 9px;
    margin-bottom: 9px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    transition: border-color 0.2s ease;
}

.density-focus-card:hover {
    border-color: rgba(56, 189, 248, 0.5);
}

.density-chan-btn {
    padding: 6px 7px !important;
    text-align: left;
    font-size: 10px;
    transition: all 0.2s ease;
}

.density-chan-btn.active {
    border-color: rgba(56, 189, 248, 0.6);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.25);
}

#btn-studio-fofc-pos.active {
    border-color: rgba(34, 197, 94, 0.6);
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.25);
}

#btn-studio-fofc-neg.active {
    border-color: rgba(239, 68, 68, 0.6);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.25);
}

.density-preset-btn,
.density-diff-preset-btn,
.density-pos-preset-btn,
.density-neg-preset-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.density-preset-btn:hover,
.density-diff-preset-btn:hover,
.density-pos-preset-btn:hover,
.density-neg-preset-btn:hover {
    background: rgba(255, 255, 255, 0.09);
    color: #fff;
}

.density-preset-btn.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: #38bdf8;
    color: #38bdf8;
    font-weight: 700;
}

.density-diff-preset-btn.active,
.density-pos-preset-btn.active {
    background: rgba(34, 197, 94, 0.2);
    border-color: #22c55e;
    color: #22c55e;
    font-weight: 700;
}

.density-neg-preset-btn.active {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
    color: #ef4444;
    font-weight: 700;
}

.density-scope-btn {
    flex: 1;
    padding: 4px 6px;
    font-size: 10px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.density-scope-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
}

.density-scope-btn.active {
    background: #1e293b;
    border-color: #475569;
    color: #fff;
    box-shadow: none;
}

/* Crystallographic Electron Density Data Source Bar & Chips */
.density-source-card {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 6px;
    padding: 6px 8px;
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.density-source-card:hover {
    border-color: rgba(56, 189, 248, 0.45);
}

.source-chip {
    padding: 3px 8px;
    font-size: 10px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.source-chip:hover {
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.35);
    color: #fff;
}

.source-chip.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: #38bdf8;
    color: #38bdf8;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.25);
}

.density-pdb-redo-link {
    color: #38bdf8;
    text-decoration: none;
    transition: color 0.15s ease;
}

.density-pdb-redo-link:hover {
    color: #7dd3fc;
    text-decoration: underline;
}

/* Floating Carbox Precision Contour Level HUD Badge */
.floating-contour-hud {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid var(--accent-cyan);
    border-radius: 24px;
    padding: 7px 18px;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.7), 0 0 20px rgba(6, 182, 212, 0.45);
    z-index: 90;
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Floating Rotation Pivot Indicator */
.floating-pivot-badge {
    position: absolute;
    top: 22px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(11, 17, 33, 0.94);
    border: 1px solid var(--accent-cyan);
    border-radius: 24px;
    padding: 6px 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.7), 0 0 16px rgba(56, 189, 248, 0.4);
    z-index: 90;
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Distance / Density Separation Control */
.measure-density-control {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(15, 23, 42, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 6px 10px;
    margin: 8px 0;
    font-size: 11px;
    color: var(--text-muted);
    transition: all 0.2s ease;
}
.measure-density-control:hover {
    border-color: rgba(56, 189, 248, 0.3);
    background: rgba(15, 23, 42, 0.9);
}
.measure-density-control span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}
.measure-density-control input[type="checkbox"] {
    accent-color: var(--accent-cyan);
    cursor: pointer;
    width: 14px;
    height: 14px;
}

/* ─── Ligand Interactions & Binding Pocket Modal & HUD Styles ─────────────── */

.ligand-modal-card {
    max-width: 950px;
    width: 92vw;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(16, 185, 129, 0.35);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 30px rgba(16, 185, 129, 0.2);
}

.ligand-modal-body {
    padding: 16px 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.ligand-controls-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding: 10px 14px;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
}

.ligand-select-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ligand-select-wrap label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.ligand-select {
    background: #0f172a;
    color: #f8fafc;
    border: 1px solid rgba(16, 185, 129, 0.4);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ligand-select:focus {
    border-color: #10b981;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.ligand-actions-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.interaction-filter-chips {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.int-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.int-chip:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.int-chip.active {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.35);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.chip-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.ligand-table-container {
    max-height: 380px;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.4);
}

.ligand-contacts-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.ligand-contacts-table th {
    position: sticky;
    top: 0;
    background: #0f172a;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 10px;
    letter-spacing: 0.5px;
    padding: 10px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: left;
    z-index: 10;
}

.ligand-contacts-table td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.ligand-contacts-table tr:hover td {
    background: rgba(255, 255, 255, 0.04);
}

.int-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
}

.dist-badge {
    font-family: var(--font-mono);
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
}

/* ─── External Biological & Crystallographic Database Registry ──────────── */
.db-registry-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 4px;
}

.db-item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-size: 11px;
}

.db-item-row:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(6, 182, 212, 0.4);
    transform: translateX(2px);
}

.db-item-info {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
}

.db-icon-badge {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    font-weight: 700;
    flex-shrink: 0;
}

.db-icon-rcsb { background: rgba(59, 130, 246, 0.2); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.4); }
.db-icon-pdbe { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.4); }
.db-icon-pdbj { background: rgba(244, 63, 94, 0.2); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.4); }
.db-icon-af { background: rgba(168, 85, 247, 0.2); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.4); }
.db-icon-uniprot { background: rgba(245, 158, 11, 0.2); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.4); }
.db-icon-chem { background: rgba(6, 182, 212, 0.2); color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.4); }
.db-icon-iucr { background: rgba(236, 72, 153, 0.2); color: #f472b6; border: 1px solid rgba(236, 72, 153, 0.4); }

.db-name {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.db-id-code {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-size: 10.5px;
    font-weight: 700;
    margin-left: 4px;
}

.db-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.db-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    background: rgba(6, 182, 212, 0.12);
    color: var(--accent-cyan);
    border: 1px solid rgba(6, 182, 212, 0.3);
    text-decoration: none;
    transition: all 0.2s ease;
}

.db-link-btn:hover {
    background: var(--accent-cyan);
    color: #090d16;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

/* ─── .CXL Macro Studio & Cross-Platform Download Hub ────────────────────── */
.cxl-modal-card {
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(168, 85, 247, 0.4);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.85), 0 0 30px rgba(168, 85, 247, 0.25);
    animation: modalSlideUp 0.25s ease;
}

.download-modal-card {
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(16, 185, 129, 0.4);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.85), 0 0 30px rgba(16, 185, 129, 0.25);
    animation: modalSlideUp 0.25s ease;
}

#cxl-editor-textarea::-webkit-scrollbar {
    width: 6px;
}
#cxl-editor-textarea::-webkit-scrollbar-thumb {
    background: rgba(168, 85, 247, 0.4);
    border-radius: 3px;
}
#cxl-editor-textarea:focus {
    border-color: #a855f7;
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.3);
}

/* ─── Ultra-Responsive Adaptations (Mobile, Tablet, Desktop) ─────────────── */

/* 1. Header Toolbar Flow & Wrapping */
.studio-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
}
.studio-header::-webkit-scrollbar {
    display: none;
}

.studio-actions-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Wide Screens (<= 1580px): Collapse secondary link text & dock text */
@media (max-width: 1580px) {
    .studio-header {
        padding: 0 8px;
        gap: 6px;
    }
    .studio-nav-cross-links .btn-studio span {
        display: none !important;
    }
    .dock-ctrl-btn span {
        display: none !important;
    }
    .header-kbd {
        display: none !important;
    }
}

/* Standard Desktop / Laptop (<= 1420px): Collapse Go to Atom text & flag codes */
@media (max-width: 1420px) {
    .studio-header {
        padding: 0 6px;
        gap: 5px;
    }
    .studio-header-group {
        gap: 4px;
    }
    #btn-studio-goto-atom span {
        display: none !important;
    }
    .studio-lang-flags .lang-flag-code {
        display: none !important;
    }
    .loader-input-wrap input {
        width: 65px !important;
    }
    .studio-options-pill-group .btn-studio.icon-only,
    .studio-quick-tools .btn-studio.icon-only {
        width: 23px !important;
        height: 23px !important;
        font-size: 10px !important;
        padding: 1px 3px !important;
    }
}

/* Mid-Size Laptops & Split Views (<= 1260px): Compact branding & buttons */
@media (max-width: 1260px) {
    .brand-title {
        display: none !important;
    }
    .loader-input-wrap input {
        width: 58px !important;
    }
    .studio-header-group {
        gap: 3px;
    }
    .studio-pill-group {
        padding: 1px 2px;
        gap: 1px;
    }
    .studio-options-pill-group .btn-studio.icon-only,
    .studio-quick-tools .btn-studio.icon-only {
        width: 22px !important;
        height: 22px !important;
        font-size: 9.5px !important;
    }
}

/* Tablets & Smaller Displays (<= 1080px): Ultra-compact & touch scrolling */
@media (max-width: 1080px) {
    .brand-badge {
        display: none !important;
    }
    .loader-input-wrap input {
        width: 50px !important;
        font-size: 9.5px !important;
    }
    .studio-header {
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: thin;
        scrollbar-color: rgba(56, 189, 248, 0.35) transparent;
    }
    .studio-header::-webkit-scrollbar {
        height: 3px;
        display: block;
    }
    .studio-header::-webkit-scrollbar-thumb {
        background: rgba(56, 189, 248, 0.4);
        border-radius: 3px;
    }
}

@media (max-width: 600px) {
    .workbench-hub-dropdown {
        width: calc(100vw - 20px) !important;
        max-width: 320px !important;
    }
}

@media (max-width: 768px) {
    .modal-card {
        width: 96vw !important;
        max-height: 92vh !important;
    }
}

/* ─── Reference Structures Gallery Styles ─────────────────────────────────── */
.ref-struct-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
    max-height: 560px;
    overflow-y: auto;
    padding: 6px 4px;
}

.ref-struct-card {
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.ref-struct-card:hover {
    border-color: #64748b;
    background: #1e293b;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.ref-struct-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.ref-struct-pdb-id {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 700;
    color: #f8fafc;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.ref-struct-pdb-id i {
    color: #94a3b8;
}

.ref-struct-res-badge {
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
    border: 1px solid;
    white-space: nowrap;
}

.res-atomic {
    background: rgba(74, 222, 128, 0.12);
    color: #4ade80;
    border-color: rgba(74, 222, 128, 0.35);
}

.res-ultra {
    background: rgba(56, 189, 248, 0.12);
    color: #38bdf8;
    border-color: rgba(56, 189, 248, 0.35);
}

.res-high {
    background: rgba(192, 132, 252, 0.12);
    color: #c084fc;
    border-color: rgba(192, 132, 252, 0.35);
}

.ref-struct-title {
    font-size: 11.5px;
    color: var(--text-muted);
    line-height: 1.4;
    height: 32px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.ref-struct-meta {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 6px;
}

.ref-struct-badge-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    align-items: center;
}

.ref-struct-tag {
    font-size: 9.5px;
    font-family: var(--font-mono);
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.ref-struct-tag.lbhb {
    background: rgba(245, 158, 11, 0.12);
    color: #fcd34d;
    border-color: rgba(245, 158, 11, 0.35);
    font-weight: 600;
}

.ref-struct-tag.anomaly-tag {
    background: rgba(56, 189, 248, 0.1);
    color: #38bdf8;
    border-color: rgba(56, 189, 248, 0.25);
}

.ref-struct-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-top: 4px;
}

.ref-struct-btn {
    width: 100%;
    padding: 6px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.ref-struct-btn:hover {
    background: #1e293b;
    border-color: #475569;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.ref-struct-btn.secondary {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

.ref-struct-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

/* ─── 1D Density Profile & Telemetry Inspector Styles ─────────────────────── */
.density-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 10px;
    margin-bottom: 8px;
}

.density-stat-card {
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.85), rgba(30, 41, 59, 0.7));
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.density-stat-label {
    font-size: 9.5px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.density-stat-val {
    font-family: var(--font-mono);
    font-size: 15px;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.density-stat-val .unit {
    font-size: 10px;
    font-weight: 400;
    color: var(--text-muted);
}

.density-chart-box {
    background: radial-gradient(circle at center, rgba(15, 23, 42, 0.95), rgba(8, 12, 22, 0.98));
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 14px;
    position: relative;
    margin-bottom: 6px;
    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.5), 0 4px 20px rgba(0, 0, 0, 0.3);
}

.density-chart-canvas {
    width: 100%;
    height: 250px;
    display: block;
    cursor: crosshair;
}

.density-verdict-banner {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
}

#btn-studio-density-profile {
    width: 100%;
    margin-top: 6px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
    font-weight: 600;
}

/* ─── Carbox Library Suspicious Atom Audit UI ───────────────────────────── */
#studio-atom-audit-card {
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.suspicious-atom-critical {
    border-color: rgba(239, 68, 68, 0.6) !important;
    background: radial-gradient(circle at top left, rgba(239, 68, 68, 0.15), rgba(15, 23, 42, 0.8)) !important;
    box-shadow: 0 0 16px rgba(239, 68, 68, 0.25) !important;
    animation: atomCriticalPulse 2s infinite ease-in-out;
}

.suspicious-atom-warning {
    border-color: rgba(245, 158, 11, 0.6) !important;
    background: radial-gradient(circle at top left, rgba(245, 158, 11, 0.15), rgba(15, 23, 42, 0.8)) !important;
    box-shadow: 0 0 14px rgba(245, 158, 11, 0.2) !important;
}

@keyframes atomCriticalPulse {
    0%, 100% {
        box-shadow: 0 0 12px rgba(239, 68, 68, 0.2);
    }
    50% {
        box-shadow: 0 0 22px rgba(239, 68, 68, 0.45);
    }
}

.audit-btn-carbox {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(14, 165, 233, 0.1));
    border: 1px solid rgba(56, 189, 248, 0.45);
    color: #38bdf8;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.audit-btn-carbox:hover {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.35), rgba(14, 165, 233, 0.25));
    border-color: rgba(56, 189, 248, 0.7);
    color: #ffffff;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.35);
    transform: translateY(-1px);
}

/* ==========================================================================
   CARBOXMOL MULTI-DEVICE RESPONSIVE ARCHITECTURE & PWA WORKBENCH
   Device Profiles:
   1. Phone (<= 640px)
   2. Tablet (641px - 1024px)
   3. Desktop / Laptop (1025px - 1920px)
   4. TV / 4K Ultra-HD Displays (>= 1921px & min-width: 2560px)
   ========================================================================== */

/* ─── PWA Specific Components ────────────────────────────────────────────── */
.pwa-install-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, #10b981, #059669) !important;
    color: #ffffff !important;
    border: 1px solid rgba(16, 185, 129, 0.4) !important;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.35);
    transition: all 0.2s ease;
    cursor: pointer;
}

.pwa-install-btn:hover {
    background: linear-gradient(135deg, #34d399, #10b981) !important;
    box-shadow: 0 0 16px rgba(16, 185, 129, 0.6);
    transform: translateY(-1px);
}

.pwa-standalone-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border-radius: 6px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.pwa-sync-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid rgba(56, 189, 248, 0.35);
    background: rgba(14, 165, 233, 0.08);
    color: var(--accent-cyan, #38bdf8);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    user-select: none;
}

.pwa-sync-badge:hover {
    background: rgba(14, 165, 233, 0.18);
    border-color: rgba(56, 189, 248, 0.6);
    box-shadow: 0 0 14px rgba(56, 189, 248, 0.3);
    transform: translateY(-1px);
}

@keyframes pwaSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes pwaFadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Unified Mobile & Tablet Drawers (<= 1024px) ────────────────────────── */
@media screen and (max-width: 1024px) {
    .studio-main {
        display: flex !important;
        flex-direction: row !important;
        position: relative !important;
        width: 100vw !important;
        max-width: 100vw !important;
        height: calc(100vh - 48px) !important;
        height: calc(100dvh - 48px) !important;
        overflow: hidden !important;
    }

    .studio-viewport-center {
        flex: 1 1 auto !important;
        width: 100% !important;
        height: 100% !important;
        min-height: 0 !important;
        position: relative !important;
    }

    /* Left Drawer: Discovered Pairs, Protonation, Density, Repr */
    .studio-sidebar-left {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        bottom: 0 !important;
        width: min(340px, 86vw) !important;
        min-width: 0 !important;
        max-width: 86vw !important;
        height: 100% !important;
        height: 100dvh !important;
        z-index: 1050 !important;
        transform: translateX(0);
        margin-left: 0 !important;
        opacity: 1 !important;
        pointer-events: auto !important;
        box-shadow: 4px 0 28px rgba(0, 0, 0, 0.75);
        transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease;
        padding-top: max(12px, env(safe-area-inset-top, 0px)) !important;
        padding-bottom: max(24px, calc(16px + env(safe-area-inset-bottom, 0px))) !important;
        padding-left: max(12px, env(safe-area-inset-left, 0px)) !important;
    }

    .studio-main.collapsed-left .studio-sidebar-left {
        transform: translateX(-105%) !important;
        opacity: 0 !important;
        pointer-events: none !important;
        width: min(340px, 86vw) !important;
        margin-left: 0 !important;
    }

    /* Right Drawer: Live Signatures, Model Validation, Measurements, etc. */
    .studio-sidebar-right {
        position: fixed !important;
        top: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: min(350px, 88vw) !important;
        min-width: 0 !important;
        max-width: 88vw !important;
        height: 100% !important;
        height: 100dvh !important;
        z-index: 1050 !important;
        transform: translateX(0);
        margin-right: 0 !important;
        opacity: 1 !important;
        pointer-events: auto !important;
        box-shadow: -4px 0 28px rgba(0, 0, 0, 0.75);
        transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease;
        padding-top: max(12px, env(safe-area-inset-top, 0px)) !important;
        padding-bottom: max(24px, calc(16px + env(safe-area-inset-bottom, 0px))) !important;
        padding-right: max(12px, env(safe-area-inset-right, 0px)) !important;
    }

    .studio-main.collapsed-right .studio-sidebar-right {
        transform: translateX(105%) !important;
        opacity: 0 !important;
        pointer-events: none !important;
        width: min(350px, 88vw) !important;
        margin-right: 0 !important;
    }
}

/* ─── Profile 1: Phone (<= 640px) ────────────────────────────────────────── */
@media screen and (max-width: 640px) {
    .studio-header {
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        height: calc(48px + env(safe-area-inset-top, 0px));
        min-height: 48px;
        padding: max(4px, env(safe-area-inset-top, 0px)) max(8px, env(safe-area-inset-right, 0px)) 4px max(8px, env(safe-area-inset-left, 0px));
        gap: 6px;
    }

    .studio-header::-webkit-scrollbar {
        display: none;
    }

    .studio-header-left,
    .studio-header-center,
    .studio-header-right {
        flex-shrink: 0;
        gap: 5px;
    }

    .studio-nav-cross-links {
        display: flex !important;
        flex-shrink: 0;
        gap: 4px;
    }

    .studio-nav-cross-links .btn-studio {
        min-height: 34px;
        padding: 4px 8px;
        font-size: 11px;
    }

    .brand-title {
        display: inline !important;
        font-size: 13px !important;
    }

    .brand-logo-img {
        width: 24px;
        height: 24px;
    }

    .studio-loader-bar {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .loader-input-wrap input {
        width: 78px !important;
        min-width: 70px !important;
        height: 36px;
        font-size: 11px !important;
    }

    /* Enforce touch-friendly tap targets for body and drawer controls without blowing up navbar */
    .studio-main .btn-studio,
    .modal-card .btn-studio {
        min-height: 38px;
        padding: 6px 10px;
        font-size: 12px;
    }

    .btn-close-drawer {
        width: 44px !important;
        height: 44px !important;
        min-width: 44px !important;
        min-height: 44px !important;
        font-size: 16px !important;
    }

    .floating-dock-btn {
        width: 38px;
        height: 48px;
        font-size: 14px;
        z-index: 1045;
        border-radius: 8px;
        background: rgba(15, 23, 42, 0.92);
        border: 1px solid rgba(56, 189, 248, 0.45);
        box-shadow: 0 4px 18px rgba(0, 0, 0, 0.65);
    }

    .header-kbd {
        display: none !important;
    }

    .pwa-standalone-badge {
        padding: 2px 6px;
        font-size: 10px;
    }
}

/* ─── Profile 2: Tablet (641px - 1024px) ─────────────────────────────────── */
@media screen and (min-width: 641px) and (max-width: 1024px) {
    .studio-header {
        padding: 5px 10px;
        overflow-x: auto;
        flex-wrap: nowrap;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    .studio-header::-webkit-scrollbar {
        display: none;
    }

    .studio-main .btn-studio,
    .modal-card .btn-studio {
        min-height: 36px;
        padding: 6px 10px;
    }
}

/* ─── Profile 3: Desktop / Laptop (1025px - 1920px) ───────────────────────── */
@media screen and (min-width: 1025px) and (max-width: 1920px) {
    /* Standard high-density crystallographic workstation */
    .studio-main {
        display: flex;
        height: calc(100vh - 48px);
    }
}

/* ─── Profile 4: TV & 4K Ultra-HD Displays (>= 1921px) ───────────────────── */
@media screen and (min-width: 1921px) {
    html {
        font-size: 18px !important;
    }

    .studio-header {
        height: 64px;
        padding: 10px 24px;
    }

    .brand-title {
        font-size: 22px !important;
    }

    .brand-badge {
        font-size: 13px !important;
        padding: 3px 8px;
    }

    .studio-sidebar-left {
        width: 420px !important;
        min-width: 400px !important;
    }

    .studio-sidebar-right {
        width: 460px !important;
        min-width: 440px !important;
    }

    .btn-studio {
        font-size: 14px !important;
        padding: 8px 16px !important;
    }

    .section-title {
        font-size: 16px !important;
    }

    /* High-contrast focus glow for TV Remote & Keyboard D-pad navigation */
    :focus-visible {
        outline: 3px solid #10b981 !important;
        outline-offset: 3px !important;
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.7) !important;
    }
}

@media screen and (min-width: 2560px) {
    html {
        font-size: 21px !important;
    }

    .studio-sidebar-left {
        width: 520px !important;
    }

    .studio-sidebar-right {
        width: 560px !important;
    }
}

/* ─── Crystallographic Viewport Top Bar (CarboxMol Precision Style) ────────── */
.viewport-crystal-topbar {
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    background: rgba(5, 10, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 0 6px;
    z-index: 15;
    pointer-events: auto;
    font-family: var(--font-sans);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.crystal-topbar-left {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    overflow: visible;
}

.crystal-topbar-select {
    background: rgba(15, 23, 42, 0.90);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #e2e8f0;
    font-size: 10px;
    padding: 1px 4px;
    height: 22px;
    line-height: 20px;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    font-weight: 600;
    transition: border-color 0.15s, background 0.15s;
    white-space: nowrap;
    max-width: 95px;
    text-overflow: ellipsis;
}

.crystal-topbar-select:hover {
    border-color: var(--accent-cyan);
    background: rgba(15, 23, 42, 0.98);
}

.crystal-topbar-center {
    flex: 1 1 auto;
    min-width: 0;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 4px;
}

.crystal-topbar-hint {
    font-size: 10px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    opacity: 0.85;
}

.crystal-topbar-right {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.crystal-pdb-badge {
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid rgba(6, 182, 212, 0.35);
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 10px;
    padding: 1px 5px;
    height: 22px;
    line-height: 20px;
    display: inline-flex;
    align-items: center;
    border-radius: 4px;
}

.crystal-sg-badge {
    background: rgba(168, 85, 247, 0.15);
    border: 1px solid rgba(168, 85, 247, 0.35);
    color: #c084fc;
    font-family: var(--font-mono);
    font-size: 10px;
    padding: 1px 5px;
    height: 22px;
    line-height: 20px;
    display: inline-flex;
    align-items: center;
    border-radius: 4px;
}

.crystal-topbar-help-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #f1f5f9;
    font-size: 10px;
    padding: 1px 6px;
    height: 22px;
    border-radius: 4px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: background 0.15s, border-color 0.15s;
}

.crystal-topbar-help-toggle:hover {
    background: rgba(6, 182, 212, 0.2);
    border-color: var(--accent-cyan);
    color: #fff;
}

@container viewport (max-width: 820px) {
    .crystal-topbar-center {
        display: none !important;
    }
}

@media (max-width: 1080px) {
    .crystal-topbar-center {
        display: none !important;
    }
}

.input-highlight-warn {
    border-color: #ef4444 !important;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.45) !important;
    animation: inputWarnShake 0.3s ease-in-out;
}
@keyframes inputWarnShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.crystal-topbar-help-toggle kbd {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
}

/* ─── CarboxMol Crystallographic Controls HUD ────────────────────────────── */
.studio-controls-hud {
    position: absolute;
    top: 46px;
    left: 12px;
    width: 330px;
    max-height: calc(100% - 60px);
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 8px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.75), 0 0 20px rgba(6, 182, 212, 0.12);
    z-index: 25;
    display: flex;
    flex-direction: column;
    font-family: 'JetBrains Mono', 'Fira Code', 'Roboto Mono', monospace, sans-serif;
    font-size: 11px;
    color: #e2e8f0;
    pointer-events: auto;
    animation: studioHudIn 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes studioHudIn {
    from { opacity: 0; transform: translateY(-6px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.studio-hud-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 7px 10px;
    background: rgba(6, 182, 212, 0.12);
    border-bottom: 1px solid rgba(6, 182, 212, 0.2);
    font-weight: 700;
    font-size: 11.5px;
    letter-spacing: 0.3px;
    color: #38bdf8;
}

.studio-hud-title {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.studio-hud-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 13px;
    padding: 2px 4px;
    border-radius: 3px;
    transition: color 0.15s, background 0.15s;
}

.studio-hud-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.studio-hud-scroll {
    overflow-y: auto;
    padding: 8px 10px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.studio-hud-scroll::-webkit-scrollbar {
    width: 4px;
}
.studio-hud-scroll::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
}

.studio-hud-section-label {
    font-weight: 700;
    font-size: 11px;
    color: #facc15;
    margin-bottom: 4px;
    text-transform: lowercase;
    border-bottom: 1px dashed rgba(250, 204, 21, 0.2);
    padding-bottom: 2px;
}

.studio-hud-line {
    padding: 2px 0;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 4px;
}

.studio-hud-k {
    color: #38bdf8;
    font-weight: 600;
}

.studio-hud-kbtn {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.25);
    color: #38bdf8;
    font-family: inherit;
    font-size: 10px;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 3px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.studio-hud-kbtn:hover {
    background: rgba(56, 189, 248, 0.25);
    color: #fff;
}

.studio-hud-v {
    color: #cbd5e1;
    font-size: 10.5px;
}

.studio-hud-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.35);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 10px;
    color: var(--text-muted);
}

.studio-hud-brand {
    color: #94a3b8;
}

.studio-hud-brand span {
    color: var(--accent-cyan);
    font-weight: 600;
}

.studio-hud-fps strong {
    color: #4ade80;
    font-weight: 700;
}