:root {
    --bg-gray: #ececec;
    --glass-bg: rgba(255, 255, 255, 0.4);
    --border-gap: 10px;
    --radius: 24px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-gray: #1a1a1a;
        --glass-bg: rgba(0, 0, 0, 0.4);
    }
}

[data-theme="dark"] {
    --bg-gray: #1a1a1a;
    --glass-bg: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
    --bg-gray: #ececec;
    --glass-bg: rgba(255, 255, 255, 0.4);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --text-color: #e0e0e0;
        --text-muted: #aaa;
        --border-color: rgba(255, 255, 255, 0.1);
    }
}

[data-theme="dark"] {
    --text-color: #e0e0e0;
    --text-muted: #aaa;
    --border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
    --text-color: #333;
    --text-muted: #666;
    --border-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-gray) 0%, var(--bg-gray) 100%);
    width: 100dvw;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) body {
        background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    }
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
}

[data-theme="light"] body {
    background: linear-gradient(135deg, #f0f0f0 0%, #e5e5e5 100%);
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100dvw;
    height: 100dvh;
    background: linear-gradient(135deg, #f0f0f0 0%, #e5e5e5 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s ease, visibility 0.3s ease, background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .loading-overlay {
        background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    }
}

[data-theme="dark"] .loading-overlay {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
}

[data-theme="light"] .loading-overlay {
    background: linear-gradient(135deg, #f0f0f0 0%, #e5e5e5 100%);
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top-color: #333;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
    transition: border-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .loading-spinner {
        border: 4px solid rgba(255, 255, 255, 0.1);
        border-top-color: #fff;
    }
}

[data-theme="dark"] .loading-spinner {
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: #fff;
}

[data-theme="light"] .loading-spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top-color: #333;
}

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

.loading-text {
    font-size: 16px;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .loading-text {
        color: #aaa;
    }
}

[data-theme="dark"] .loading-text {
    color: #aaa;
}

[data-theme="light"] .loading-text {
    color: #666;
}

.glass-frame {
    position: relative;
    width: 100%;
    flex: 1;
    min-height: 0;
    max-height: 100%;
    padding: var(--border-gap);
    background: transparent;
    border: none;
    display: flex;
    transition: background 0.3s ease;
    overflow: hidden;
}
.glass-frame.dragover {
    background: rgba(255, 255, 255, 0.3);
    outline: 4px dashed rgba(0,0,0,0.1);
    outline-offset: -30px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .glass-frame.dragover {
        background: rgba(0, 0, 0, 0.3);
        outline: 4px dashed rgba(255, 255, 255, 0.1);
    }
}

[data-theme="dark"] .glass-frame.dragover {
    background: rgba(0, 0, 0, 0.3);
    outline: 4px dashed rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .glass-frame.dragover {
    background: rgba(255, 255, 255, 0.3);
    outline: 4px dashed rgba(0,0,0,0.1);
}

.inner-content {
    flex: 1;
    min-height: 0;
    background: transparent;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: row;
    gap: var(--border-gap);
}

@media (max-width: 767px) {
    .inner-content {
        flex-direction: column;
    }
    
    .ship-name-display {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .content-main {
        border-radius: 0;
    }
}

.model-viewer-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    border-radius: var(--radius);
    overflow: hidden;
    background: #fdfdfd;
    position: relative;
}

.content-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: #fdfdfd;
    border-radius: 0;
    overflow: hidden;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    min-height: 0;
    transition: background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .content-main {
        background: #0f0f0f;
    }
}

[data-theme="dark"] .content-main {
    background: #0f0f0f;
}

[data-theme="light"] .content-main {
    background: #fdfdfd;
}

.model-loading-spinner {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
}

.model-loading-spinner.show {
    opacity: 1;
    visibility: visible;
}

.model-spinner-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.model-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(59, 130, 246, 0.2);
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

.model-loading-progress {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    font-weight: 600;
    color: #3b82f6;
    user-select: none;
    pointer-events: none;
}

@keyframes spinner-rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.ship-name-display {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius) var(--radius) 0 0;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: none;
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
    transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
    cursor: pointer;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .ship-name-display {
        background: rgba(0, 0, 0, 0.7);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        color: #e0e0e0;
    }
}

[data-theme="dark"] .ship-name-display {
    background: rgba(0, 0, 0, 0.7);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: #e0e0e0;
}

[data-theme="light"] .ship-name-display {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    color: #333;
}

.ship-name-display.show {
    display: block;
}

.ship-name-display:hover {
    background: rgba(255, 255, 255, 0.98);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .ship-name-display:hover {
        background: rgba(0, 0, 0, 0.8);
    }
}

[data-theme="dark"] .ship-name-display:hover {
    background: rgba(0, 0, 0, 0.8);
}

[data-theme="light"] .ship-name-display:hover {
    background: rgba(255, 255, 255, 0.98);
}

.ship-name-display:active {
    opacity: 0.9;
}

.sidebar {
    width: 300px;
    min-width: 200px;
    max-width: 50%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    display: none;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .sidebar {
        background: rgba(0, 0, 0, 0.7);
    }
}

[data-theme="dark"] .sidebar {
    background: rgba(0, 0, 0, 0.7);
}

[data-theme="light"] .sidebar {
    background: rgba(255, 255, 255, 0.95);
}

.sidebar.show {
    display: flex;
}

.search-box {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    background: rgba(0, 0, 0, 0.02);
    transition: border-color 0.3s ease, background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-box {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(255, 255, 255, 0.02);
    }
}

[data-theme="dark"] .search-box {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .search-box {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    background: rgba(0, 0, 0, 0.02);
}

.search-box input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s ease, background 0.3s ease, color 0.3s ease;
    background: white;
    color: #333;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-box input {
        border: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(255, 255, 255, 0.05);
        color: #e0e0e0;
    }
}

[data-theme="dark"] .search-box input {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #e0e0e0;
}

[data-theme="light"] .search-box input {
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: white;
    color: #333;
}

.search-box input:focus {
    border-color: #333;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-box input:focus {
        border-color: #fff;
    }
}

[data-theme="dark"] .search-box input:focus {
    border-color: #fff;
}

[data-theme="light"] .search-box input:focus {
    border-color: #333;
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 102;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: none;
    transition: background 0.3s ease, border-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-results {
        background: rgba(0, 0, 0, 0.9);
        border: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    }
}

[data-theme="dark"] .search-results {
    background: rgba(0, 0, 0, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .search-results {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.search-results.show {
    display: block;
}

.search-result-item {
    padding: 10px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background 0.2s ease, border-color 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-result-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
}

[data-theme="dark"] .search-result-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .search-result-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.search-result-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-result-item:hover {
        background: rgba(255, 255, 255, 0.05);
    }
}

[data-theme="dark"] .search-result-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .search-result-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.3s ease, filter 0.3s ease;
    position: absolute;
    top: 0;
    left: 0;
}

.search-result-icon.loaded {
    opacity: 1;
    background: transparent;
}

.search-result-info {
    flex: 1;
    min-width: 0;
}

.search-result-name {
    font-size: 14px;
    color: #333;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-result-name {
        color: #e0e0e0;
    }
}

[data-theme="dark"] .search-result-name {
    color: #e0e0e0;
}

[data-theme="light"] .search-result-name {
    color: #333;
}

.search-result-path {
    font-size: 12px;
    color: #999;
    margin-top: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-result-path {
        color: #aaa;
    }
}

[data-theme="dark"] .search-result-path {
    color: #aaa;
}

[data-theme="light"] .search-result-path {
    color: #999;
}

.breadcrumb {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    font-size: 12px;
    background: rgba(0, 0, 0, 0.02);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: #666;
    cursor: pointer;
    transition: color 0.2s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .breadcrumb-item {
        color: #aaa;
    }
}

[data-theme="dark"] .breadcrumb-item {
    color: #aaa;
}

[data-theme="light"] .breadcrumb-item {
    color: #666;
}

.breadcrumb-item:hover {
    color: #000;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .breadcrumb-item:hover {
        color: #fff;
    }
}

[data-theme="dark"] .breadcrumb-item:hover {
    color: #fff;
}

[data-theme="light"] .breadcrumb-item:hover {
    color: #000;
}

.breadcrumb-item.active {
    color: #333;
    font-weight: 500;
    cursor: default;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .breadcrumb-item.active {
        color: #e0e0e0;
    }
}

[data-theme="dark"] .breadcrumb-item.active {
    color: #e0e0e0;
}

[data-theme="light"] .breadcrumb-item.active {
    color: #333;
}

.breadcrumb-item.active:hover {
    color: #333;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .breadcrumb-item.active:hover {
        color: #e0e0e0;
    }
}

[data-theme="dark"] .breadcrumb-item.active:hover {
    color: #e0e0e0;
}

[data-theme="light"] .breadcrumb-item.active:hover {
    color: #333;
}

.breadcrumb-separator {
    margin: 0 4px;
    color: #999;
    user-select: none;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .breadcrumb-separator {
        color: #666;
    }
}

[data-theme="dark"] .breadcrumb-separator {
    color: #666;
}

[data-theme="light"] .breadcrumb-separator {
    color: #999;
}

.nav-content {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    position: relative;
}

.nav-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease, background 0.3s ease;
    z-index: 50;
    border-radius: 0 0 var(--radius) var(--radius);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .nav-content::before {
        background: rgba(0, 0, 0, 0.4);
    }
}

[data-theme="dark"] .nav-content::before {
    background: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .nav-content::before {
    background: rgba(255, 255, 255, 0.4);
}

.nav-content.search-overlay::before {
    opacity: 1;
    pointer-events: auto;
}

.sidebar-resizer {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    cursor: col-resize;
    background: transparent;
    z-index: 10;
    transition: background 0.2s ease;
}

.sidebar-resizer:hover {
    background: rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .sidebar-resizer:hover {
        background: rgba(255, 255, 255, 0.1);
    }
}

[data-theme="dark"] .sidebar-resizer:hover {
    background: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .sidebar-resizer:hover {
    background: rgba(0, 0, 0, 0.1);
}

.sidebar-resizer.active {
    background: rgba(0, 0, 0, 0.2);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .sidebar-resizer.active {
        background: rgba(255, 255, 255, 0.2);
    }
}

[data-theme="dark"] .sidebar-resizer.active {
    background: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .sidebar-resizer.active {
    background: rgba(0, 0, 0, 0.2);
}

.bottom-panel {
    display: none;
    flex-shrink: 0;
}

.bottom-panel.show {
    display: block;
}

.model-selector-btn {
    width: 100%;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 500;
    color: #333;
    cursor: pointer;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
    transition: all 0.2s ease, background 0.3s ease, color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .model-selector-btn {
        background: rgba(0, 0, 0, 0.7);
        color: #e0e0e0;
        box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    }
}

[data-theme="dark"] .model-selector-btn {
    background: rgba(0, 0, 0, 0.7);
    color: #e0e0e0;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

[data-theme="light"] .model-selector-btn {
    background: rgba(255, 255, 255, 0.95);
    color: #333;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.model-selector-btn:active {
    transform: scale(0.98);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.drawer-overlay.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.drawer-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80vh;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius) var(--radius) 0 0;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2);
    z-index: 101;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    visibility: hidden;
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.3s ease;
    overflow: hidden;
    pointer-events: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .drawer-panel {
        background: rgba(0, 0, 0, 0.9);
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.5);
    }
}

[data-theme="dark"] .drawer-panel {
    background: rgba(0, 0, 0, 0.9);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .drawer-panel {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2);
}

.drawer-panel.show {
    transform: translateY(0);
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
}

.drawer-header {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
    transition: border-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .drawer-header {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

[data-theme="dark"] .drawer-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .drawer-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.drawer-close-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    transition: color 0.2s ease, background 0.2s ease;
    border-radius: 6px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .drawer-close-btn {
        color: #aaa;
    }
}

[data-theme="dark"] .drawer-close-btn {
    color: #aaa;
}

[data-theme="light"] .drawer-close-btn {
    color: #666;
}

.drawer-close-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #000;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .drawer-close-btn:hover {
        background: rgba(255, 255, 255, 0.05);
        color: #fff;
    }
}

[data-theme="dark"] .drawer-close-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

[data-theme="light"] .drawer-close-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #000;
}

.drawer-close-btn svg {
    width: 20px;
    height: 20px;
}

.drawer-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@media (max-width: 767px) {
    .content-main {
        flex: 1;
        min-height: 0;
    }
}

.model-selector-placeholder {
    text-align: center;
    color: #888;
    font-size: 14px;
    padding: 20px;
}

.category-tree {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-item,
.group-item,
.type-item {
    margin: 4px 0;
}

.category-header,
.group-header,
.type-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s ease;
    user-select: none;
}

.category-header:hover,
.group-header:hover,
.type-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-header:hover,
    :root:not([data-theme="light"]) .group-header:hover,
    :root:not([data-theme="light"]) .type-item:hover {
        background: rgba(255, 255, 255, 0.05);
    }
}

[data-theme="dark"] .category-header:hover,
[data-theme="dark"] .group-header:hover,
[data-theme="dark"] .type-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .category-header:hover,
[data-theme="light"] .group-header:hover,
[data-theme="light"] .type-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

.category-header:active,
.group-header:active,
.type-item:active {
    background: rgba(0, 0, 0, 0.1);
    transition: background 0.1s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-header:active,
    :root:not([data-theme="light"]) .group-header:active,
    :root:not([data-theme="light"]) .type-item:active {
        background: rgba(255, 255, 255, 0.1);
    }
}

[data-theme="dark"] .category-header:active,
[data-theme="dark"] .group-header:active,
[data-theme="dark"] .type-item:active {
    background: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .category-header:active,
[data-theme="light"] .group-header:active,
[data-theme="light"] .type-item:active {
    background: rgba(0, 0, 0, 0.1);
}

.category-header,
.group-header,
.type-item {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

.nav-arrow {
    margin-left: auto;
    width: 16px;
    height: 16px;
    color: #999;
    flex-shrink: 0;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .nav-arrow {
        color: #666;
    }
}

[data-theme="dark"] .nav-arrow {
    color: #666;
}

[data-theme="light"] .nav-arrow {
    color: #999;
}

.nav-arrow svg {
    width: 100%;
    height: 100%;
}

.type-item.active {
    background: rgba(0, 0, 0, 0.1);
    transition: background 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .type-item.active {
        background: rgba(255, 255, 255, 0.1);
    }
}

[data-theme="dark"] .type-item.active {
    background: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .type-item.active {
    background: rgba(0, 0, 0, 0.1);
}

.icon-wrapper {
    position: relative;
    width: 24px;
    height: 24px;
    margin-right: 8px;
    flex-shrink: 0;
}

.category-icon,
.group-icon,
.type-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.3s ease, filter 0.3s ease, background 0.3s ease;
    position: absolute;
    top: 0;
    left: 0;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-icon,
    :root:not([data-theme="light"]) .group-icon,
    :root:not([data-theme="light"]) .type-icon {
        background: rgba(255, 255, 255, 0.05);
    }
}

[data-theme="dark"] .category-icon,
[data-theme="dark"] .group-icon,
[data-theme="dark"] .type-icon {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .category-icon,
[data-theme="light"] .group-icon,
[data-theme="light"] .type-icon {
    background: rgba(0, 0, 0, 0.05);
}

.category-icon.loaded,
.group-icon.loaded,
.type-icon.loaded {
    opacity: 1;
    background: transparent;
}

.icon-loading-spinner {
    position: absolute;
    top: 0;
    left: 0;
    width: 24px;
    height: 24px;
    border: 2px solid rgba(59, 130, 246, 0.2);
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    pointer-events: none;
}


.category-icon.no-model,
.group-icon.no-model,
.type-icon.no-model {
    filter: grayscale(100%);
    opacity: 0.5;
}

.category-icon.loaded,
.group-icon.loaded,
.type-icon.loaded {
    opacity: 1;
    background: transparent;
}

.category-icon.loaded.no-model,
.group-icon.loaded.no-model,
.type-icon.loaded.no-model {
    opacity: 0.5;
}

.category-name,
.group-name,
.type-name {
    flex: 1;
    font-size: 14px;
    color: #333;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-name,
    :root:not([data-theme="light"]) .group-name,
    :root:not([data-theme="light"]) .type-name {
        color: #e0e0e0;
    }
}

[data-theme="dark"] .category-name,
[data-theme="dark"] .group-name,
[data-theme="dark"] .type-name {
    color: #e0e0e0;
}

[data-theme="light"] .category-name,
[data-theme="light"] .group-name,
[data-theme="light"] .type-name {
    color: #333;
}

.category-name.no-model,
.group-name.no-model,
.type-name.no-model {
    color: #999;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-name.no-model,
    :root:not([data-theme="light"]) .group-name.no-model,
    :root:not([data-theme="light"]) .type-name.no-model {
        color: #666;
    }
}

[data-theme="dark"] .category-name.no-model,
[data-theme="dark"] .group-name.no-model,
[data-theme="dark"] .type-name.no-model {
    color: #666;
}

[data-theme="light"] .category-name.no-model,
[data-theme="light"] .group-name.no-model,
[data-theme="light"] .type-name.no-model {
    color: #999;
}

.category-name {
    font-weight: 600;
}

.category-count {
    color: #999;
    font-weight: 400;
    font-size: 12px;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .category-count {
        color: #666;
    }
}

[data-theme="dark"] .category-count {
    color: #666;
}

[data-theme="light"] .category-count {
    color: #999;
}

.group-name {
    font-weight: 500;
}

.type-name {
    font-weight: 400;
}

.upload-ui {
    text-align: center;
    z-index: 5;
    transition: transform 0.3s ease;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.btn-select {
    pointer-events: auto;
    margin-top: 20px;
    padding: 12px 32px;
    border: none;
    background: #111;
    color: white;
    border-radius: 50px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-select:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.2); }

.upload-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    color: #3b82f6;
    display: block;
}

.hint { 
    color: #888; 
    font-size: 18px; 
    font-weight: 300; 
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .hint {
        color: #aaa;
    }
}

[data-theme="dark"] .hint {
    color: #aaa;
}

.info-text-container {
    margin-top: 30px;
    max-width: 600px;
    padding: 0 20px;
    pointer-events: auto;
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}

.info-text {
    color: #666;
    font-size: 14px;
    font-weight: 300;
    line-height: 1.6;
    margin: 12px 0;
    transition: color 0.3s ease;
    pointer-events: auto;
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .info-text {
        color: #999;
    }
}

[data-theme="dark"] .info-text {
    color: #999;
}

.info-text a {
    color: #0066cc;
    text-decoration: underline;
    transition: color 0.3s ease;
}

.info-text a:hover {
    color: #0052a3;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .info-text a {
        color: #4a9eff;
    }
    :root:not([data-theme="light"]) .info-text a:hover {
        color: #6bb3ff;
    }
}

[data-theme="dark"] .info-text a {
    color: #4a9eff;
}

[data-theme="dark"] .info-text a:hover {
    color: #6bb3ff;
}

.theme-toggle-btn {
    margin-top: 20px;
    padding: 10px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    transition: background 0.3s ease, transform 0.2s ease;
    pointer-events: auto;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

.theme-icon {
    width: 20px;
    height: 20px;
    transition: color 0.3s ease;
}

.theme-icon-left {
    fill: currentColor;
}

.theme-icon-right {
    fill: white;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-icon {
        color: #fff;
    }
    :root:not([data-theme="light"]) .theme-icon-right {
        fill: #000;
    }
}

[data-theme="dark"] .theme-icon {
    color: #fff;
}

[data-theme="dark"] .theme-icon-right {
    fill: #000;
}

[data-theme="light"] .theme-icon {
    color: #333;
}

[data-theme="light"] .theme-icon-right {
    fill: white;
}

model-viewer {
    width: 100%;
    height: 100%;
    display: none;
    background-color: #f5f5f5;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    transition: background-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) model-viewer {
        background-color: #0f0f0f;
    }
}

[data-theme="dark"] model-viewer {
    background-color: #303030;
}

[data-theme="light"] model-viewer {
    background-color: #f5f5f5;
}

model-viewer.active { display: block; }

.file-input { display: none; }


.error-tag {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 87, 87, 0.95);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    box-shadow: 0 4px 16px rgba(255, 87, 87, 0.3);
    z-index: 20;
    max-width: 80%;
    text-align: center;
}

.error-tag.show { opacity: 1; }

.action-toast {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(147, 197, 253, 0.95);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    color: #1e3a8a;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    box-shadow: 0 4px 16px rgba(147, 197, 253, 0.4);
    z-index: 20;
    max-width: 80%;
    text-align: center;
    font-weight: 500;
}

.action-toast.show {
    opacity: 1;
}

.action-toast.hide {
    opacity: 0;
}

.brightness-control {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.9);
    padding: 16px 12px;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.5);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, background 0.3s ease, border-color 0.3s ease;
    z-index: 10;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .brightness-control {
        background: rgba(0, 0, 0, 0.7);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }
}

[data-theme="dark"] .brightness-control {
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .brightness-control {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255,255,255,0.5);
}

.brightness-control.show {
    opacity: 1;
    pointer-events: auto;
}

.brightness-icon,
.control-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    cursor: pointer;
    transition: transform 0.2s ease, color 0.2s ease;
    color: #555;
}

.brightness-icon:hover,
.control-icon:hover {
    color: #000;
    transform: scale(1.1);
}

.brightness-icon:active,
.control-icon:active {
    transform: scale(0.9);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .brightness-icon,
    :root:not([data-theme="light"]) .control-icon {
        color: #aaa;
    }
    
    :root:not([data-theme="light"]) .brightness-icon:hover,
    :root:not([data-theme="light"]) .control-icon:hover {
        color: #fff;
    }
}

[data-theme="dark"] .brightness-icon,
[data-theme="dark"] .control-icon {
    color: #aaa;
}

[data-theme="dark"] .brightness-icon:hover,
[data-theme="dark"] .control-icon:hover {
    color: #fff;
}

[data-theme="light"] .brightness-icon,
[data-theme="light"] .control-icon {
    color: #555;
}

[data-theme="light"] .brightness-icon:hover,
[data-theme="light"] .control-icon:hover {
    color: #000;
}

.brightness-slider {
    -webkit-appearance: slider-vertical;
    writing-mode: bt-lr;
    width: 4px;
    height: 120px;
    border-radius: 2px;
    background: #e0e0e0;
    outline: none;
}

.brightness-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #111;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    border: 2px solid white;
}

.brightness-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #111;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.copyright-footer {
    width: 100%;
    padding: 16px var(--border-gap);
    background: rgba(0, 0, 0, 0.02);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    flex-shrink: 0;
    max-height: 200px;
    opacity: 1;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .copyright-footer {
        background: rgba(255, 255, 255, 0.02);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
}

[data-theme="dark"] .copyright-footer {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .copyright-footer {
    background: rgba(0, 0, 0, 0.02);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.copyright-footer.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    border-top: none;
}

.copyright-footer p {
    font-size: 9px;
    line-height: 1.3;
    color: #666;
    text-align: center;
    margin: 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    transition: color 0.3s ease;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .copyright-footer p {
        color: #aaa;
    }
}

[data-theme="dark"] .copyright-footer p {
    color: #aaa;
}

[data-theme="light"] .copyright-footer p {
    color: #666;
}

@media (max-width: 767px) {
    .copyright-footer {
        padding: 12px 16px;
    }
    
    .copyright-footer p {
        font-size: 8px;
        line-height: 1.2;
    }
}