/* ─── CSS Variables ──────────────────────────────────────────────── */
:root {
    /* Light theme (default override when [data-theme="light"]) */
    --bg:              #f5f6fb;
    --bg-secondary:    #f8fafc;
    --card-bg:         #ffffff;
    --text:            #0f172a;
    --text-secondary:  #1f2937;
    --text-muted:      #64748b;
    --border:          #e5e7eb;
    --border-light:    #e2e8f0;
    --header-bg:       #ffffff;
    --sidebar-bg:      #f8fafc;
    --workspace-bg:    linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    --pill-bg:         #e4e7ef;
    --pill-btn-active: #ffffff;
    --search-bg:       #fdfdff;
    --search-border:   #d9deeb;
    --accordion-bg:    #ffffff;
    --accordion-fold:  #eef2ff;
    --accordion-fold-text: #312e81;
    --accordion-domain: #eff6ff;
    --accordion-domain-text: #1e3a8a;
    --accordion-uniprot: #f8fafc;
    --accordion-uniprot-text: #0f172a;
    --accordion-hover: #f8fafc;
    --stat-card-bg:    #ffffff;
    --stat-item-bg:    #f8fafc;
    --stat-title:      #0f172a;
    --stat-label:      #475569;
    --ghost-bg:        #e2e8f0;
    --ghost-color:     #1e293b;
    --ghost-hover:     #cbd5f5;
    --download-bg:     #e7eaf3;
    --download-color:  #1f2937;
    --clear-bg:        #f1f4fb;
    --clear-color:     #1d3a8a;
    --list-header:     #1f2937;
    --traj-bg:         rgba(240, 240, 240, 0.98);
    --traj-color:      #333;
    --traj-border:     #ddd;
    --traj-btn-bg:     #e5e7eb;
    --traj-btn-border: #d1d5db;
    --traj-btn-color:  #374151;
    --traj-slider-bg:  #d1d5db;
    --traj-thumb:      #374151;
    --traj-label:      #374151;
    --traj-select-bg:  #f3f4f6;
    --traj-select-border: #d1d5db;
    --traj-select-color: #374151;
    --traj-frame:      #666;
    --input-bg:        #ffffff;
    --input-color:     #0f172a;
    --primary:         #2563eb;
    --primary-dark:    #1d4ed8;
    --dark-card:       #0f172a;
    --light-card-bg:   #ffffff;
    --light-card-shadow: 0px 20px 40px rgba(15, 23, 42, 0.08);
    --uniprot-controls-border: #e0e0e0;
}

[data-theme="dark"] {
    --bg:              #0a0f1e;
    --bg-secondary:    #0f172a;
    --card-bg:         #1a2540;
    --text:            #e2e8f0;
    --text-secondary:  #cbd5e1;
    --text-muted:      #94a3b8;
    --border:          #1e293b;
    --border-light:    #253347;
    --header-bg:       #0f172a;
    --sidebar-bg:      #0f172a;
    --workspace-bg:    linear-gradient(180deg, #0a0f1e 0%, #0d1529 100%);
    --pill-bg:         #1a2540;
    --pill-btn-active: #253659;
    --search-bg:       #152035;
    --search-border:   #253347;
    --accordion-bg:    #1a2540;
    --accordion-fold:  #1a2d50;
    --accordion-fold-text: #93c5fd;
    --accordion-domain: #162444;
    --accordion-domain-text: #60a5fa;
    --accordion-uniprot: #152035;
    --accordion-uniprot-text: #cbd5e1;
    --accordion-hover: #1e3058;
    --stat-card-bg:    #1a2540;
    --stat-item-bg:    #152035;
    --stat-title:      #e2e8f0;
    --stat-label:      #94a3b8;
    --ghost-bg:        #1e293b;
    --ghost-color:     #e2e8f0;
    --ghost-hover:     #263a5c;
    --download-bg:     #1e293b;
    --download-color:  #e2e8f0;
    --clear-bg:        #162444;
    --clear-color:     #93c5fd;
    --list-header:     #e2e8f0;
    --traj-bg:         rgba(15, 25, 50, 0.97);
    --traj-color:      #e2e8f0;
    --traj-border:     #253347;
    --traj-btn-bg:     #1e293b;
    --traj-btn-border: #334155;
    --traj-btn-color:  #e2e8f0;
    --traj-slider-bg:  #334155;
    --traj-thumb:      #60a5fa;
    --traj-label:      #94a3b8;
    --traj-select-bg:  #1e293b;
    --traj-select-border: #334155;
    --traj-select-color: #e2e8f0;
    --traj-frame:      #94a3b8;
    --input-bg:        #152035;
    --input-color:     #e2e8f0;
    --primary:         #3b82f6;
    --primary-dark:    #2563eb;
    --dark-card:       #060c1a;
    --light-card-bg:   #121e35;
    --light-card-shadow: 0px 20px 40px rgba(0, 0, 0, 0.35);
    --uniprot-controls-border: #253347;
}

/* ─── Base ───────────────────────────────────────────────────────── */
body {
    margin: 0;
    font-family: "Inter", Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* ─── Header ─────────────────────────────────────────────────────── */
.app-header {
    height: 64px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 50;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.brand {
    font-weight: 800;
    letter-spacing: 0.06em;
    font-size: 1.2rem;
    color: var(--primary);
    text-transform: uppercase;
    font-variant-numeric: tabular-nums;
}

.header-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.header-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-left: 14px;
    text-decoration: none;
    transition: color 0.2s ease;
}

.header-links a:hover {
    color: var(--text);
}

.theme-toggle-btn {
    margin-left: 16px;
    background: var(--ghost-bg);
    color: var(--ghost-color);
    border: none;
    border-radius: 10px;
    padding: 6px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
    font-family: inherit;
    white-space: nowrap;
}

.theme-toggle-btn:hover {
    background: var(--ghost-hover);
}

/* ─── Layout ─────────────────────────────────────────────────────── */
.app-shell {
    flex: 1;
    display: flex;
    min-height: 0;
    overflow: hidden;
}

.app-shell > * {
    min-width: 0;
}

.sidebar {
    width: 320px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    padding: 22px 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    height: calc(100vh - 64px);
    overflow: hidden;
    min-height: 0;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.layout-card,
.list-card {
    background: var(--card-bg);
    border-radius: 18px;
    box-shadow: 0px 12px 24px rgba(15, 23, 42, 0.06);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: background 0.25s ease;
}

[data-theme="dark"] .layout-card,
[data-theme="dark"] .list-card {
    box-shadow: 0px 12px 24px rgba(0, 0, 0, 0.3);
}

/* ─── Pill Toggle ────────────────────────────────────────────────── */
.pill-toggle {
    background: var(--pill-bg);
    border-radius: 16px;
    padding: 4px;
    display: flex;
    gap: 4px;
    border: 1px solid var(--border-light);
}

.view-btn {
    flex: 1;
    border: none;
    border-radius: 10px;
    background: transparent;
    padding: 10px 0;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.view-btn.active {
    background: var(--pill-btn-active);
    color: var(--text);
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.15), inset 0 0 0 1px var(--border-light);
}

.view-btn:focus-visible {
    outline: 2px solid var(--primary);
}

/* ─── Search ─────────────────────────────────────────────────────── */
.search-row {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--search-border);
    border-radius: 16px;
    padding: 8px 12px;
    background: var(--search-bg);
}

.search-row input {
    border: none;
    outline: none;
    flex: 1;
    font-size: 0.9rem;
    font-family: inherit;
    background: transparent;
    color: var(--text);
}

.search-row input::placeholder {
    color: var(--text-muted);
}

.search-icon,
.search-icon-btn {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    flex-shrink: 0;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    outline: none;
}
.search-icon-btn:hover,
.search-icon-btn:focus,
.search-icon-btn:active {
    background: none;
    outline: none;
    box-shadow: none;
}

/* ─── Buttons ────────────────────────────────────────────────────── */
.ghost-btn,
.ghost-icon {
    border: none;
    background: var(--ghost-bg);
    color: var(--ghost-color);
    border-radius: 10px;
    padding: 6px 10px;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s;
    font-weight: 600;
}

.ghost-btn:hover,
.ghost-icon:hover {
    background: var(--ghost-hover);
    transform: translateY(-1px);
}

.ghost-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    font-size: 0.9rem;
}

.primary-actions {
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.primary-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.primary-btn {
    flex: 1;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 16px;
    padding: 11px;
    font-size: 0.96rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.primary-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.download-btn {
    width: 56px;
    min-height: 48px;
    border-radius: 16px;
    border: none;
    background: var(--download-bg);
    color: var(--download-color);
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.download-btn:hover {
    background: var(--ghost-hover);
    transform: translateY(-1px);
}

.clear-btn {
    width: 100%;
    border: none;
    border-radius: 16px;
    padding: 12px;
    background: var(--clear-bg);
    color: var(--clear-color);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.clear-btn:hover {
    background: var(--ghost-hover);
    transform: translateY(-1px);
}

button {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 0.9em;
    flex: 1;
}

button:hover {
    background-color: var(--primary-dark);
}

button:disabled {
    background-color: #94a3b8;
    cursor: not-allowed;
}

/* ─── List Card & Accordion ──────────────────────────────────────── */
.list-card {
    flex: 1;
    min-height: 0;
    margin-bottom: 35px;
}

.list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    color: var(--list-header);
    margin-bottom: 12px;
}



.filter-toggle-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: 1px solid transparent;
    background: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.filter-toggle-btn:hover {
    color: var(--text);
}
.filter-toggle-btn.active {
    color: var(--accent, #4f8ef7);
}

.conf-filter-panel {
    background: var(--stat-item-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 12px 12px;
    margin-top: 8px;
}

.conf-filter-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.82rem;
    color: var(--stat-label);
    margin-bottom: 8px;
}

.conf-filter-label strong {
    color: var(--text);
}

.conf-filter-max {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.conf-filter-slider {
    width: 100%;
    accent-color: var(--accent, #4f8ef7);
    cursor: pointer;
}

.conf-filter-hint {
    margin: 6px 0 0;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
}

.muted {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.accordion-wrapper {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding-right: 6px;
    padding-bottom: 22px;
    margin-right: -6px;
}

.accordion {
    margin-top: 6px;
}

.accordion-item {
    border-radius: 14px;
    border: 1px solid var(--border-light);
    margin-bottom: 10px;
    overflow: hidden;
    background-color: var(--accordion-bg);
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.05);
    transition: background 0.25s ease, border-color 0.25s ease;
}

[data-theme="dark"] .accordion-item {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.accordion-header {
    cursor: pointer;
    padding: 12px 14px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
}

.accordion-header:hover {
    background-color: var(--accordion-hover);
}

.accordion-header.level-fold {
    background-color: var(--accordion-fold);
    color: var(--accordion-fold-text);
}

.accordion-header.level-domain {
    background-color: var(--accordion-domain);
    color: var(--accordion-domain-text);
    padding-left: 24px;
}

.accordion-header.level-uniprot {
    background-color: var(--accordion-uniprot);
    color: var(--accordion-uniprot-text);
    padding-left: 32px;
}

.uniprot-title {
    flex: 1;
}

.accordion-content {
    display: none;
    padding: 0 8px;
    border-top: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.35s ease;
}

.accordion-content.open {
    display: block;
    padding: 8px 12px;
    max-height: 10000px;
    opacity: 1;
    overflow-y: auto;
    transition: max-height 0.45s ease, opacity 0.35s ease 0.1s, padding 0.35s ease;
}

.accordion-content label {
    display: block;
    padding: 3px 0;
    color: var(--text);
}

.accordion-content.level-fold,
.accordion-content.level-fold.open {
    padding: 0;
}

.accordion-content.level-domain {
    padding: 0;
}

.accordion-content.level-domain.open {
    padding: 8px 12px;
}

.arrow {
    transition: transform 0.3s ease;
    display: inline-block;
}

/* ─── Workspace ──────────────────────────────────────────────────── */
.workspace {
    flex: 1;
    height: calc(100vh - 64px);
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--workspace-bg);
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

/* ─── Stats Sidebar ──────────────────────────────────────────────── */
.stats-sidebar {
    width: 320px;
    border-left: 1px solid var(--border);
    background: var(--sidebar-bg);
    padding: 24px 20px;
    overflow-y: auto;
    height: calc(100vh - 64px);
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: background 0.25s ease, border-color 0.25s ease;
}

/* ─── Viewer Grid ────────────────────────────────────────────────── */
.viewer-grid {
    flex: 1;
    display: grid;
    grid-template-rows: repeat(2, 1fr);
    gap: 0;
    min-height: 0;
    height: 100%;
    padding: 0;
}

.viewer-card {
    border-radius: 0;
    padding: 14px 18px;
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 0;
    min-width: 0;
}

.light-card {
    background: var(--light-card-bg);
    color: var(--text);
    box-shadow: var(--light-card-shadow);
    transition: background 0.25s ease, color 0.25s ease;
}

[data-theme="dark"] .light-card {
    background: var(--dark-card);
    color: #e2e8f0;
    box-shadow: none;
}

.dark-card {
    background: var(--dark-card);
    color: #e2e8f0;
    box-shadow: 0px 24px 50px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .dark-card {
    background: var(--light-card-bg);
    color: var(--text);
    box-shadow: var(--light-card-shadow);
}

.viewer-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 6px;
}

.viewer-card-header h2 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: inherit;
}

.viewer-card-header p {
    margin: 2px 0 0 0;
    color: var(--text-muted);
    font-size: 0.88rem;
}

.light-card .viewer-card-header p {
    color: var(--text-muted);
}

.dark-card .viewer-card-header p {
    color: rgba(226, 232, 240, 0.8);
}

[data-theme="light"] .dark-card .viewer-card-header p {
    color: var(--text-muted);
}

.viewer-card-actions {
    display: flex;
    gap: 8px;
}

.viewer-stage {
    flex: 1;
    position: relative;
    min-height: 0;
    height: 100%;
    border-radius: 0;
    background: var(--light-card-bg);
    overflow: hidden;
    box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.25);
}

.dark-card .viewer-stage {
    background: #080e1e;
    box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.1);
}

.viewer {
    width: 100%;
    height: 100%;
    border: none;
    background: transparent;
}

.viewer,
.viewer canvas {
    width: 100%;
    height: 100%;
}

.viewer canvas {
    display: block;
}

.dark-viewer {
    background: #080e1e;
    border-color: rgba(148, 163, 184, 0.2);
}

.viewer-stage:fullscreen,
.viewer-stage:-webkit-full-screen,
.viewer-stage:-moz-full-screen,
.viewer-stage:-ms-fullscreen {
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    max-height: 100vh !important;
    flex: none !important;
}

.viewer-stage:fullscreen .viewer,
.viewer-stage:-webkit-full-screen .viewer,
.viewer-stage:-moz-full-screen .viewer,
.viewer-stage:-ms-fullscreen .viewer {
    width: 100% !important;
    height: 100% !important;
}

/* ─── Stats Cards ────────────────────────────────────────────────── */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}

.stats-card {
    background: var(--stat-card-bg);
    border-radius: 18px;
    padding: 18px;
    box-shadow: 0px 12px 28px rgba(15, 23, 42, 0.08);
    border: 1px solid var(--border-light);
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.3s ease, background 0.25s ease;
    margin-bottom: 16px;
    display: none;
}

[data-theme="dark"] .stats-card {
    box-shadow: 0px 12px 28px rgba(0, 0, 0, 0.3);
}

.stats-card.visible {
    display: block !important;
    opacity: 1;
    transform: translateY(0);
}

.stats-card h3 {
    margin: 0 0 12px 0;
    font-size: 1rem;
    color: var(--stat-title);
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.stat-item {
    background: var(--stat-item-bg);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: background 0.25s ease;
}

.stat-item span {
    font-size: 0.8rem;
    color: var(--stat-label);
}

.stat-item strong {
    font-size: 1rem;
    color: var(--text);
}

.small-text {
    font-size: 0.85rem !important;
    word-break: break-word;
    color: var(--text-secondary);
}

/* ─── Stats Info Button & Popover ───────────────────────────────── */
.stats-info-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1.5px solid var(--stat-label);
    background: none;
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--stat-label);
    padding: 0;
    line-height: 1;
    flex: none;
    transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.stats-info-btn:hover {
    border-color: var(--accent, #4f8ef7);
    color: var(--accent, #4f8ef7);
    background: rgba(79, 142, 247, 0.1);
}

.stats-info-popover {
    position: absolute;
    z-index: 1100;
    background: var(--stat-card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 18px 14px;
    width: 300px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.22);
    pointer-events: auto;
}

.stats-info-popover h4 {
    margin: 0 0 10px;
    font-size: 0.95rem;
    color: var(--stat-title);
}

.stats-info-popover p.panel-desc {
    margin: 0 0 12px;
    font-size: 0.82rem;
    color: var(--stat-label);
    line-height: 1.45;
}

.stats-info-popover dl {
    margin: 0;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 5px 10px;
    font-size: 0.82rem;
}
.stats-info-popover dt {
    font-weight: 600;
    color: var(--stat-title);
    white-space: nowrap;
}
.stats-info-popover dd {
    margin: 0;
    color: var(--stat-label);
    line-height: 1.4;
}

/* ─── Hover Infobar ──────────────────────────────────────────────── */
.hover-infobar {
    position: absolute;
    bottom: 8px;
    right: 10px;
    pointer-events: none;
    background: rgba(15, 23, 42, 0.82);
    color: #f8fafc;
    padding: 4px 10px;
    border-radius: 5px;
    font-size: 0.8em;
    font-family: monospace;
    letter-spacing: 0.03em;
    opacity: 0;
    transition: opacity 0.08s ease;
    z-index: 250;
}

.hover-infobar.visible {
    opacity: 1;
}

/* ─── Right Panel (legacy) ───────────────────────────────────────── */
.right-panel {
    width: 20%;
    background-color: var(--card-bg);
    border-left: 1px solid var(--border);
    padding: 20px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
    overflow-y: auto;
}

.right-panel h2 {
    font-size: 1em;
    margin-top: 0;
    margin-bottom: 15px;
    color: #1e3a8a;
    font-weight: 600;
}

/* ─── Viewer Overlay Controls ────────────────────────────────────── */
.viewer-animation-cluster {
    position: absolute;
    top: 18px;
    left: 18px;
    display: flex;
    gap: 8px;
    z-index: 100;
    align-items: flex-start;
}

.viewer-button-cluster {
    position: absolute;
    top: 18px;
    right: 18px;
    display: flex;
    gap: 8px;
    z-index: 100;
    align-items: flex-start;
}

/* ─── Superposition Controls ─────────────────────────────────────── */
.superposition-controls {
    background: rgba(10, 15, 30, 0.97);
    backdrop-filter: blur(10px);
    padding: 10px 12px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    min-width: 200px;
    max-width: 220px;
    color: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.85em;
    position: relative;
}

.superposition-controls.collapsed {
    min-width: 40px;
    max-width: 40px;
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
}

.super-toggle-btn {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0;
    border-radius: 4px;
    cursor: pointer;
    color: #1e3a8a;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: all 0.2s;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.super-toggle-btn:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
    transform: translateY(-1px);
}

.superposition-controls.collapsed .super-toggle-btn {
    display: flex;
}

.superposition-controls.collapsed .super-toggle-btn .toggle-text {
    display: none;
}

.superposition-controls:not(.collapsed) .super-toggle-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    padding: 0;
    width: 30px;
    height: 30px;
    font-size: 0.9em;
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
}

.super-content {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.superposition-controls.collapsed .super-content {
    display: none;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
}

.superposition-controls:not(.collapsed) .super-content {
    display: block;
    opacity: 1;
    max-height: 1000px;
}

.super-header {
    margin-bottom: 10px;
    padding-bottom: 8px;
    padding-right: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 600;
    font-size: 0.9em;
}

.super-options {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85em;
}

.super-options label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: white;
}

.super-options select {
    padding: 4px 8px;
    border-radius: 4px;
    background: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
    cursor: pointer;
    font-size: 0.85em;
}

/* ─── Fullscreen Button ──────────────────────────────────────────── */
.fullscreen-btn {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0;
    border-radius: 4px;
    cursor: pointer;
    color: #1e3a8a;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: all 0.2s;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.fullscreen-btn:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
    transform: translateY(-1px);
}

/* ─── Trajectory Controls ────────────────────────────────────────── */
.trajectory-controls {
    background: rgba(10, 15, 30, 0.97);
    backdrop-filter: blur(10px);
    padding: 10px 12px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    min-width: 200px;
    max-width: 240px;
    color: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.85em;
    position: relative;
    z-index: 100;
}

.trajectory-controls.collapsed {
    min-width: 40px;
    max-width: 40px;
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
}

.traj-toggle-btn {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0;
    border-radius: 4px;
    cursor: pointer;
    color: #1e3a8a;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: all 0.2s;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.traj-toggle-btn:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
    transform: translateY(-1px);
}

.trajectory-controls.collapsed .traj-toggle-btn {
    display: flex;
}

.trajectory-controls:not(.collapsed) .traj-toggle-btn {
    position: absolute;
    top: 6px;
    left: 6px;
    width: 30px;
    height: 30px;
    font-size: 0.9em;
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: white;
    box-shadow: none;
}

.traj-toggle-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.traj-toggle-btn.disabled:hover {
    transform: none;
}

.traj-content {
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.8em;
}

.trajectory-controls.collapsed .traj-content {
    display: none;
    opacity: 0;
}

.trajectory-controls:not(.collapsed) .traj-content {
    display: block;
    opacity: 1;
    padding-top: 28px;
}

.traj-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--traj-border);
}

.traj-type {
    font-weight: 600;
    font-size: 0.9em;
    color: var(--traj-color);
}

.no-trajectory-message {
    padding: 8px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85em;
    font-style: italic;
}

.download-nmd {
    background-color: #059669;
    color: white;
    border: none;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.7em;
    cursor: pointer;
    transition: background-color 0.2s;
}

.download-nmd:hover {
    background-color: #047857;
}

.traj-buttons {
    display: flex;
    gap: 4px;
    margin-bottom: 6px;
}

.traj-buttons button {
    flex: 1;
    padding: 5px 4px;
    background-color: var(--traj-btn-bg);
    border: 1px solid var(--traj-btn-border);
    color: var(--traj-btn-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    font-weight: 500;
    transition: all 0.2s;
}

.traj-buttons button:hover {
    background-color: var(--ghost-hover);
}

.traj-buttons button:active {
    opacity: 0.75;
}

.traj-slider-container {
    margin-bottom: 6px;
}

.traj-slider-container input[type="range"] {
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--traj-slider-bg);
    outline: none;
    -webkit-appearance: none;
    margin-bottom: 3px;
}

.traj-slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--traj-thumb);
    cursor: pointer;
}

.traj-slider-container input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--traj-thumb);
    cursor: pointer;
    border: none;
}

#trajFrame {
    font-size: 0.75em;
    color: var(--traj-frame);
}

.traj-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
    font-size: 0.75em;
    flex-wrap: wrap;
    margin-bottom: 3px;
}

.traj-options label {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--traj-label);
}

.traj-options input[type="checkbox"] {
    cursor: pointer;
}

.traj-options input[type="range"] {
    flex: 1;
    height: 3px;
    background: var(--traj-slider-bg);
    outline: none;
    -webkit-appearance: none;
}

.traj-options input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--traj-thumb);
    cursor: pointer;
}

.traj-options input[type="range"]::-moz-range-thumb {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--traj-thumb);
    cursor: pointer;
    border: none;
}

#trajSpeedValue,
#trajAmplitudeValue {
    display: inline-block;
    min-width: 18px;
    text-align: center;
    font-size: 0.85em;
    color: var(--traj-label);
}

.traj-options select {
    padding: 2px 4px;
    border-radius: 3px;
    background: var(--traj-select-bg);
    color: var(--traj-select-color);
    border: 1px solid var(--traj-select-border);
    cursor: pointer;
    font-size: 0.8em;
}

/* ─── Loading Spinner ────────────────────────────────────────────── */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e0e7ff;
    border-top: 4px solid #1e40af;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.progress-banner {
    background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
    padding: 14px 16px;
    border-radius: 16px;
    border: 1px solid rgba(79, 70, 229, 0.15);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
    margin: 0 0 12px 0;
}

[data-theme="dark"] .progress-banner {
    background: linear-gradient(135deg, #162040 0%, #1a2a55 100%);
    border-color: rgba(96, 165, 250, 0.2);
}

.progress-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.progress-label {
    font-weight: 600;
    color: #1e3a8a;
}

[data-theme="dark"] .progress-label {
    color: #93c5fd;
}

.progress-sub {
    font-size: 0.85em;
    color: #4338ca;
}

[data-theme="dark"] .progress-sub {
    color: #818cf8;
}

.progress-status {
    font-weight: 600;
    color: #312e81;
}

[data-theme="dark"] .progress-status {
    color: #a5b4fc;
}

.progress-bar {
    width: 100%;
    height: 8px;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.15);
    overflow: hidden;
    margin-bottom: 6px;
}

.progress-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, #60a5fa, #3b82f6, #1d4ed8);
    transition: width 0.3s ease;
}

.progress-note {
    font-size: 0.75em;
    color: var(--text-muted);
}

/* ─── Oligomers ──────────────────────────────────────────────────── */
.uniprot-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--uniprot-controls-border);
}

.uniprot-controls button {
    flex: 1;
    padding: 4px 8px;
    font-size: 0.85em;
    background-color: #60a5fa;
}

.uniprot-controls button:hover {
    background-color: #3b82f6;
}

.control-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.oligomers-section {
    margin-top: 6px;
    border-top: 1px solid rgba(255,255,255,0.15);
}

.oligomers-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 600;
    color: #a0c4ff;
    letter-spacing: 0.04em;
    border-radius: 4px;
}

.oligomers-header:hover {
    background: rgba(255,255,255,0.06);
}

.oligomers-body {
    display: none;
    padding-left: 8px;
}

.oligomers-controls {
    margin-bottom: 4px;
}

.oligomers-body.open {
    display: block;
}