/* style.css - Blender Lab Viewer */

:root {
    --bg-base: #0a0c10;
    --bg-surface: #12161f;
    --bg-surface-elevated: #1a202c;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(79, 142, 247, 0.4);
    --text-primary: #f0f4fc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-glow: rgba(59, 130, 246, 0.2);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --font-ui: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
}

#app {
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
}

/* Top Navigation Bar */
#top-bar {
    height: 52px;
    background-color: rgba(15, 18, 26, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 20;
    position: relative;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(6, 182, 212, 0.15));
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}

.brand-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: #fff;
}

/* Project Selector */
.project-selector-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0 10px;
    transition: all 0.2s ease;
}

.project-selector-wrapper:hover {
    border-color: var(--border-highlight);
    background-color: rgba(26, 32, 44, 0.9);
}

#project-select {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 20px 6px 6px;
    outline: none;
    cursor: pointer;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
    max-width: 220px;
}

.select-chevron {
    position: absolute;
    right: 8px;
    pointer-events: none;
    color: var(--text-muted);
}

/* Segmented View Mode Switcher - Floating Capsule on Desktop & Mobile */
.view-modes {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 3px;
    background-color: rgba(15, 20, 30, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 3px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    max-width: calc(100vw - 32px);
    width: auto;
}

.mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 18px;
    cursor: pointer;
    transition: all 0.18s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap;
}

.mode-btn:hover {
    color: var(--text-primary);
}

.mode-btn.active {
    background-color: var(--accent-blue);
    color: #fff;
    box-shadow: 0 1px 6px rgba(59, 130, 246, 0.35);
}

/* Milestone Archive Dropdown inside Segmented Pill */
.archive-select-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.archive-select {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 18px;
    cursor: pointer;
    outline: none;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.archive-select:hover {
    color: var(--text-primary);
}

.archive-select.active {
    background-color: var(--accent-blue);
    color: #fff;
    box-shadow: 0 1px 6px rgba(59, 130, 246, 0.35);
}

.archive-select option {
    background-color: #12161f;
    color: var(--text-primary);
}

.mode-text-full {
    display: inline;
}

.action-label-text {
    display: inline;
}

/* Actions Group */
.actions-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    line-height: 1;
    min-height: 32px;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.action-btn:hover {
    border-color: var(--accent-blue);
    background-color: rgba(59, 130, 246, 0.12);
}

.download-btn {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(6, 182, 212, 0.18));
    border-color: rgba(59, 130, 246, 0.45);
    color: #fff;
}

.download-btn:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(6, 182, 212, 0.3));
    border-color: var(--accent-cyan);
    box-shadow: 0 2px 10px rgba(6, 182, 212, 0.25);
}

.hud-presets {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.preset-buttons {
    display: flex;
    gap: 6px;
}

.preset-btn {
    flex: 1;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 10px;
    font-weight: 600;
    padding: 5px 6px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.preset-btn:hover {
    color: #fff;
    border-color: var(--border-highlight);
}

.preset-btn.active {
    background-color: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
}

.hud-toggles {
    margin-top: 10px;
    font-size: 11px;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
}

.toggle-label input {
    cursor: pointer;
    accent-color: var(--accent-blue);
}

.hud-downloads {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.hud-btn {
    flex: 1;
    text-align: center;
    text-decoration: none;
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 600;
    padding: 7px 8px;
    border-radius: 6px;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.hud-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-highlight);
    background-color: rgba(255, 255, 255, 0.05);
}

.hud-btn-primary {
    background-color: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.4);
    color: #93c5fd;
}

.hud-btn-primary:hover {
    background-color: rgba(59, 130, 246, 0.3);
    border-color: var(--accent-blue);
    color: #fff;
}

.hud-btn-video {
    background-color: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.4);
    color: #67e8f9;
}

.hud-btn-video:hover {
    background-color: rgba(6, 182, 212, 0.3);
    border-color: var(--accent-cyan);
    color: #fff;
}

/* Main Viewport */
#viewport-container {
    flex: 1;
    position: relative;
    width: 100%;
    height: calc(100vh - 56px);
}

#canvas-3d {
    width: 100%;
    height: 100%;
}

#canvas-3d canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* 2D Render Overlay for High-Res Cycles Stills */
#render-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 12, 16, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    padding: 60px 20px 20px;
    box-sizing: border-box;
}

.render-overlay-bar {
    position: absolute;
    top: 16px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 12;
}

.render-caption {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(15, 20, 30, 0.85);
    backdrop-filter: blur(12px);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.render-close-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.render-close-btn:hover {
    border-color: var(--accent-blue);
    background-color: rgba(59, 130, 246, 0.2);
    color: #fff;
}

.render-image-wrapper {
    max-width: min(92vw, 1280px);
    max-height: min(78vh, 820px);
    display: flex;
    align-items: center;
    justify-content: center;
}

#render-overlay img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    object-fit: contain;
}

/* HUD Overlay - Unified Floating Capsule on Desktop */
#hud {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 240px;
    max-height: calc(100vh - 84px);
    background-color: rgba(15, 20, 30, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 14px 16px;
    z-index: 15;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    font-size: 12px;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    overflow-y: auto;
}

#hud.collapsed {
    max-height: 36px;
    width: auto;
    padding: 6px 14px;
    border-radius: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.hud-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    user-select: none;
}

.hud-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

#hud.collapsed .hud-header {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

#hud.collapsed #hud-content {
    display: none;
}

#hud-project-name {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 13px;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.status-pill {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
}

.status-ready {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.hud-stats {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-label {
    color: var(--text-muted);
    font-size: 11px;
}

.stat-val {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 11px;
}

.stat-val.stat-good {
    color: #10b981;
    font-weight: 700;
}

.stat-val.stat-warn {
    color: #f59e0b;
    font-weight: 700;
}

.stat-val.stat-bad {
    color: #ef4444;
    font-weight: 700;
}

/* Loading Overlay */
#loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 12, 16, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 30;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-blue);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#loading-text {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

#loading-bar-wrapper {
    width: 200px;
    height: 4px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

#loading-bar {
    width: 0%;
    height: 100%;
    background-color: var(--accent-blue);
    transition: width 0.2s ease;
}

/* Toast */
#toast {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 13px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    z-index: 40;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translate(-50%, 10px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* Scene Groups Outliner - Unified Floating Capsule on Desktop */
#outliner {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 250px;
    max-height: calc(100vh - 84px);
    background-color: rgba(15, 20, 30, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 12px;
    z-index: 15;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

#outliner.collapsed {
    max-height: 36px;
    width: auto;
    padding: 6px 14px;
    border-radius: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

#outliner.collapsed .outliner-header {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

#outliner.collapsed #outliner-tree {
    display: none;
}

.outliner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.outliner-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.panel-icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    width: 24px;
    height: 24px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    line-height: 1;
    transition: all 0.2s ease;
}

.panel-icon-btn:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.08);
}

.outliner-collapse-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    line-height: 1;
}

.outliner-collapse-btn:hover {
    color: #fff;
    background-color: var(--bg-surface-elevated);
}

.outliner-tree {
    overflow-y: auto;
    max-height: calc(100vh - 180px);
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-right: 4px;
}

.outliner-tree::-webkit-scrollbar {
    width: 4px;
}
.outliner-tree::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 2px;
}

.tree-group-box {
    background: rgba(30, 41, 59, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 7px;
    overflow: hidden;
    margin-bottom: 5px;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.tree-group-box.is-open {
    border-color: rgba(255, 255, 255, 0.13);
    background: rgba(30, 41, 59, 0.6);
}

.tree-group-box.is-collapsed {
    border-color: rgba(255, 255, 255, 0.05);
}

.tree-children {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: max-height 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
    max-height: 800px;
    opacity: 1;
}

.tree-group-box.is-collapsed .tree-children {
    max-height: 0;
    opacity: 0;
    pointer-events: none;
}

.tree-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5px 8px;
    font-size: 11px;
    transition: all 0.15s ease;
    cursor: pointer;
    user-select: none;
    border-left: 3px solid transparent;
}

.tree-row:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.tree-row.parent-row {
    background-color: rgba(30, 41, 59, 0.85);
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.tree-row.parent-row.group-hidden .tree-name {
    opacity: 0.6;
}

.tree-row.child-row {
    padding-left: 18px;
    color: var(--text-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.02);
}

.tree-branch-line {
    display: inline-block;
    width: 6px;
    height: 1px;
    background: rgba(255, 255, 255, 0.15);
    margin-right: 2px;
}

.tree-row.selected-group-row {
    background: rgba(245, 158, 11, 0.22) !important;
    border-left: 3px solid #f59e0b !important;
    color: #fbbf24;
}

.tree-row.selected-group-row .tree-label {
    color: #fbbf24;
    font-weight: 600;
}

.tree-label {
    display: flex;
    align-items: center;
    gap: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-chevron-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    margin-right: 2px;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), color 0.15s ease, background-color 0.15s ease;
}

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

.tree-group-box.is-collapsed .tree-chevron-btn svg {
    transform: rotate(-90deg);
}

.chevron-svg {
    display: block;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.group-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
    font-size: 9px;
    font-weight: 600;
    line-height: 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    margin-left: 4px;
    letter-spacing: 0;
}

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

.tree-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-muted);
    transition: all 0.15s;
    line-height: 1;
}

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

.tree-btn.eye-btn {
    color: var(--text-muted);
}

.tree-btn.eye-btn:hover {
    color: #38bdf8;
}

.tree-btn.hidden-eye {
    color: #ef4444;
    opacity: 0.6;
}

.tree-row.item-hidden {
    opacity: 0.45;
}

.tree-row.item-hidden .tree-name {
    text-decoration: line-through;
    text-decoration-color: rgba(239, 68, 68, 0.5);
}

.tree-children.parent-hidden .tree-row.child-row {
    opacity: 0.35;
}

.tree-children.parent-hidden .tree-btn.eye-btn {
    opacity: 0.25;
    pointer-events: none;
}

.hidden {
    display: none !important;
}

.icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.tree-svg {
    width: 13px;
    height: 13px;
    display: block;
}

.tree-row:hover .icon-wrap,
.tree-row.selected-group-row .icon-wrap {
    color: currentColor;
}

.panel-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 700;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    line-height: 1;
    transition: all 0.2s ease;
}

.panel-toggle-btn:hover {
    color: #fff;
    background-color: var(--bg-surface-elevated);
}

.hud-title-group {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

/* ==========================================================================
   Mobile & Tablet Responsiveness System
   ========================================================================== */

@media (max-width: 900px) {
    #hud {
        width: 220px;
        right: 14px;
    }
    #outliner {
        width: 230px;
        left: 14px;
    }
}

@media (max-width: 768px) {
    /* Full height dynamic viewport */
    body, html, #app {
        height: 100%;
        height: -webkit-fill-available;
        height: 100dvh;
    }

    /* Single-Row Seamless Top Bar */
    #top-bar {
        height: 50px;
        padding: 0 12px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        background-color: rgba(15, 18, 26, 0.94);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        position: relative;
        z-index: 30;
    }

    .brand {
        gap: 8px;
    }

    .brand-logo {
        width: 26px;
        height: 26px;
    }

    .brand-title {
        font-size: 14px;
    }

    .project-selector-wrapper {
        max-width: 140px;
        height: 30px;
        padding: 0 6px;
        border-radius: 15px;
    }

    #project-select {
        font-size: 11px;
        padding: 3px 18px 3px 4px;
        max-width: 110px;
    }

    .actions-group {
        gap: 6px;
    }

    .action-label-text {
        display: none;
    }

    .action-btn {
        min-height: 32px;
        min-width: 32px;
        padding: 0;
        justify-content: center;
        border-radius: 8px;
    }

    /* Floating View Mode Switcher */
    .view-modes {
        position: absolute;
        top: 14px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 20;
        background: rgba(15, 20, 30, 0.88);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 24px;
        padding: 3px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
        max-width: calc(100vw - 24px);
        width: auto;
    }

    .mode-text-full {
        display: none;
    }

    .mode-text-short {
        display: inline;
        font-size: 11px;
        font-weight: 600;
    }

    .mode-btn {
        padding: 6px 14px;
        min-height: 32px;
        border-radius: 18px;
    }

    /* Viewport Area */
    #viewport-container {
        height: auto;
        flex: 1;
        min-height: 0;
        position: relative;
        touch-action: none;
        overscroll-behavior: none;
    }

    /* Outliner on Mobile */
    #outliner {
        position: absolute;
        z-index: 22;
        transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
    }

    #outliner.collapsed {
        bottom: 16px;
        left: 16px;
        top: auto;
        right: auto;
        width: auto;
        max-height: 38px;
        padding: 6px 14px;
        border-radius: 20px;
        background: rgba(15, 20, 30, 0.88);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
    }

    #outliner.collapsed .outliner-header {
        margin: 0;
        padding: 0;
        border: none;
    }

    #outliner.collapsed #outliner-tree {
        display: none;
    }

    #outliner:not(.collapsed) {
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        width: 100%;
        max-height: 60vh;
        border-radius: 20px 20px 0 0;
        padding: 16px;
        background: rgba(15, 20, 30, 0.96);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-bottom: none;
        box-shadow: 0 -12px 36px rgba(0, 0, 0, 0.7);
    }

    #outliner:not(.collapsed) .outliner-tree {
        max-height: calc(60vh - 60px);
    }

    .tree-row {
        min-height: 38px;
        padding: 8px 12px;
        font-size: 13px;
    }

    .tree-btn {
        min-width: 32px;
        min-height: 32px;
        font-size: 13px;
    }

    .tree-chevron-btn {
        min-width: 32px;
        min-height: 32px;
        padding: 6px;
    }

    .group-count-badge {
        padding: 1px 7px;
        font-size: 10px;
        line-height: 16px;
    }

    .panel-icon-btn {
        min-width: 32px;
        min-height: 32px;
    }

    /* HUD on Mobile */
    #hud {
        position: absolute;
        z-index: 21;
        transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
    }

    #hud.collapsed {
        bottom: 16px;
        right: 16px;
        top: auto;
        left: auto;
        width: auto;
        max-height: 38px;
        padding: 6px 14px;
        border-radius: 20px;
        background: rgba(15, 20, 30, 0.88);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
    }

    #hud.collapsed .hud-header {
        margin: 0;
        padding: 0;
        border: none;
    }

    #hud.collapsed #hud-content {
        display: none;
    }

    #hud.collapsed #hud-project-name {
        max-width: 120px;
        font-size: 11px;
    }

    #hud:not(.collapsed) {
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        width: 100%;
        max-height: 65vh;
        border-radius: 20px 20px 0 0;
        padding: 18px 16px;
        background: rgba(15, 20, 30, 0.96);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-bottom: none;
        box-shadow: 0 -12px 36px rgba(0, 0, 0, 0.7);
        overflow-y: auto;
    }

    .preset-btn {
        min-height: 38px;
        font-size: 12px;
    }

    .hud-btn {
        min-height: 40px;
        font-size: 12px;
    }

    /* 2D Preview Overlay */
    #render-overlay img {
        max-width: 95%;
        max-height: 75%;
    }
}

@media (max-width: 420px) {
    .brand-title {
        font-size: 13px;
    }

    .project-selector-wrapper {
        max-width: 115px;
    }

    #project-select {
        max-width: 90px;
    }

    .mode-btn {
        padding: 5px 10px;
        font-size: 10px;
    }

    #hud.collapsed #hud-project-name {
        max-width: 85px;
    }
}

/* ==========================================================================
   Animation Panel
   ========================================================================== */

#anim-badge {
    display: none;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.06em;
    background: linear-gradient(90deg, rgba(59,130,246,0.25), rgba(6,182,212,0.25));
    border: 1px solid rgba(6,182,212,0.4);
    color: var(--accent-cyan);
    border-radius: 4px;
    padding: 1px 5px;
    margin-left: 6px;
    vertical-align: middle;
}

.anim-panel {
    border-top: 1px solid var(--border-color);
    padding: 10px 14px 8px;
}

.anim-panel-header {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-cyan);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.anim-clip-name {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 10px;
    font-family: var(--font-mono);
    font-weight: 400;
}

.anim-transport {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
}

.anim-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    flex-shrink: 0;
}

.anim-btn:hover {
    background: rgba(59,130,246,0.15);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.anim-play-btn {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(6,182,212,0.2));
    border-color: rgba(59,130,246,0.4);
    color: var(--accent-cyan);
}

.anim-play-btn:hover {
    background: linear-gradient(135deg, rgba(59,130,246,0.35), rgba(6,182,212,0.35));
    border-color: var(--accent-cyan);
    color: #fff;
}

.anim-time-wrap {
    display: flex;
    align-items: center;
    gap: 3px;
    margin-left: auto;
}

.anim-time {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-primary);
}

.anim-time-dur {
    color: var(--text-muted);
}

.anim-time-sep {
    color: var(--text-muted);
    font-size: 11px;
}

.anim-scrub-wrap {
    margin-bottom: 8px;
}

.anim-scrubber {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    outline: none;
    cursor: pointer;
    accent-color: var(--accent-cyan);
}

.anim-scrubber::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--accent-cyan);
    border: 2px solid var(--bg-base);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(6,182,212,0.5);
}

.anim-scrubber::-moz-range-thumb {
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--accent-cyan);
    border: 2px solid var(--bg-base);
    cursor: pointer;
}

.anim-speed-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.anim-speed-btns {
    display: flex;
    gap: 4px;
}

.anim-speed-btn {
    padding: 2px 7px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-surface-elevated);
    color: var(--text-muted);
    font-size: 10px;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.anim-speed-btn:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.anim-speed-btn.anim-speed-active {
    background: rgba(59,130,246,0.18);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    font-weight: 700;
}

/* ==========================================================================
   MP4 Export Panel
   ========================================================================== */

.mp4-panel {
    border-top: 1px solid var(--border-color);
    padding: 0;
}

.mp4-panel-header {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 14px;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
}

.mp4-panel-header:hover {
    color: var(--text-primary);
}

.mp4-chevron {
    margin-left: auto;
    transition: transform 0.2s;
    color: var(--text-muted);
}

.mp4-panel-body {
    padding: 0 14px 12px;
}

.mp4-panel-body.hidden {
    display: none;
}

.mp4-form {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.mp4-field {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mp4-field .stat-label {
    flex: 0 0 72px;
    font-size: 11px;
}

.mp4-field--groups {
    flex-direction: column;
    align-items: flex-start;
}

.mp4-select {
    flex: 1;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 11px;
    font-family: var(--font-ui);
    padding: 4px 7px;
    outline: none;
    cursor: pointer;
    transition: border-color 0.15s;
}

.mp4-select:focus {
    border-color: var(--accent-blue);
}

.mp4-group-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3px 6px;
    width: 100%;
    max-height: 140px;
    overflow-y: auto;
}

.mp4-group-row {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 10.5px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2px 0;
}

.mp4-group-row--child {
    padding-left: 10px;
    color: var(--text-muted);
}

.mp4-group-row input[type="checkbox"] {
    accent-color: var(--accent-blue);
    width: 12px;
    height: 12px;
    cursor: pointer;
    flex-shrink: 0;
}

.mp4-actions {
    margin-top: 4px;
}

.mp4-status {
    font-size: 11px;
    font-family: var(--font-mono);
    padding: 6px 8px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    margin-top: 4px;
}

.mp4-status--running {
    color: var(--warning);
    border-color: rgba(245,158,11,0.3);
    background: rgba(245,158,11,0.06);
}

.mp4-status--done {
    color: var(--success);
    border-color: rgba(16,185,129,0.3);
    background: rgba(16,185,129,0.06);
}

.mp4-status--error {
    color: var(--danger);
    border-color: rgba(239,68,68,0.3);
    background: rgba(239,68,68,0.06);
}

.mp4-dl-link {
    color: var(--accent-cyan);
    text-decoration: underline;
    cursor: pointer;
}