/* Modern VRML Viewer Styles - Fusion360-inspired */

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

:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --border-color: #3e3e42;
    --text-primary: #cccccc;
    --text-secondary: #969696;
    --accent: #0e639c;
    --accent-hover: #1177bb;
    --success: #4ec9b0;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 50px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 16px;
    gap: 16px;
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.tool-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.tool-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tool-btn.active {
    background: var(--accent);
    color: white;
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 16px;
    height: 32px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 4px;
}

.color-picker-wrapper {
    position: relative;
    width: 36px;
    height: 36px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.color-picker-wrapper:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.color-picker-wrapper input[type="color"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

/* Main Content */
.main-content {
    display: flex;
    height: calc(100vh - 50px);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.component-toggle-all {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: all 0.2s;
}

.component-toggle-all:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.model-list {
    max-height: 200px;
    overflow-y: auto;
    padding: 8px;
}

.component-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.model-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    margin-bottom: 4px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.model-item:hover {
    background: #3e3e42;
}

.model-item.selected {
    background: var(--accent);
}

.visibility-toggle {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.visibility-toggle:hover {
    color: var(--text-primary);
}

.visibility-toggle.hidden {
    opacity: 0.4;
}

.model-name {
    flex: 1;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.model-stats {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.delete-btn {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity 0.2s;
}

.model-item:hover .delete-btn {
    opacity: 1;
}

.delete-btn:hover {
    color: #f48771;
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    position: relative;
    background: #e8e8ea;
}

#viewer-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 100;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(14, 99, 156, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Drop Zone */
.drop-zone {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(14, 99, 156, 0.1);
    border: 2px dashed var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}

.drop-content {
    text-align: center;
    color: var(--accent);
}

.drop-content svg {
    margin-bottom: 16px;
    opacity: 0.8;
}

.drop-content p {
    font-size: 16px;
    font-weight: 500;
}

/* Stats Overlay */
.stats-overlay {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(37, 37, 38, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 12px;
    font-size: 12px;
    min-width: 180px;
    z-index: 10;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    color: var(--success);
    font-weight: 600;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4e4e4e;
}

/* Component Items */
.component-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    margin-bottom: 2px;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 12px;
}

.component-item:hover {
    background: var(--bg-tertiary);
}

.component-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--accent);
}

.component-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-primary);
}

.component-type {
    font-size: 10px;
    color: var(--text-secondary);
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
}

/* Empty State */
.empty-state {
    padding: 32px 16px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
}

.empty-state p {
    margin: 0;
}

.empty-state svg {
    margin-bottom: 12px;
    opacity: 0.3;
}

/* Model Selection Overlay */
.model-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.model-overlay.active {
    display: flex;
}

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

.overlay-content {
    background: var(--bg-secondary);
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    animation: slideUp 0.3s ease;
}

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

.overlay-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.overlay-header h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.close-overlay {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.close-overlay:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.overlay-body {
    padding: 24px;
    overflow-y: auto;
    max-height: calc(80vh - 80px);
}

.overlay-section {
    margin-bottom: 24px;
}

.overlay-section:last-child {
    margin-bottom: 0;
}

.overlay-section h3 {
    margin: 0 0 16px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.overlay-model-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px 12px;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.overlay-model-tile:hover {
    background: #3e3e42;
    border-color: var(--accent);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.overlay-model-tile:active {
    transform: translateY(0);
}

.overlay-model-tile svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.overlay-model-tile:hover svg {
    opacity: 1;
}

.overlay-model-name {
    font-size: 12px;
    text-align: center;
    word-break: break-word;
    line-height: 1.3;
    font-weight: 500;
}

.overlay-divider {
    text-align: center;
    margin: 24px 0;
    position: relative;
}

.overlay-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: var(--border-color);
}

.overlay-divider span {
    position: relative;
    background: var(--bg-secondary);
    padding: 0 16px;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.overlay-upload-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.overlay-upload-btn:hover {
    background: #7d8ff4;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
}

.overlay-upload-btn:active {
    transform: translateY(0);
}

/* Sidebar Toggle - Hidden */
.sidebar-toggle {
    display: none;
}

.sidebar-expand-btn {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    /* Tablet */
    .sidebar {
        width: 220px;
    }

    .toolbar-left,
    .toolbar-right {
        gap: 4px;
    }

    .tool-btn {
        padding: 8px;
    }

    .btn-primary {
        padding: 8px 12px;
        font-size: 13px;
    }
}

@media (max-width: 768px) {
    /* Mobile */
    body {
        font-size: 14px;
    }

    .header {
        padding: 12px 16px;
    }

    .header h1 {
        font-size: 18px;
    }

    .toolbar {
        padding: 8px 12px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .toolbar-left,
    .toolbar-right {
        flex-wrap: wrap;
    }

    .divider {
        display: none;
    }

    .sidebar {
        width: 200px;
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .sidebar-expand-btn {
        display: flex;
        top: 80px;
    }

    .sidebar.collapsed ~ .sidebar-expand-btn,
    .sidebar.mobile-open ~ .sidebar-expand-btn {
        display: none;
    }

    .sidebar.mobile-open ~ .sidebar-expand-btn {
        display: flex;
    }

    .stats-overlay {
        bottom: 8px;
        right: 8px;
        font-size: 11px;
        padding: 8px 12px;
    }

    .model-overlay .overlay-content {
        width: 95%;
        max-height: 90vh;
    }

    .model-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 8px;
    }

    .overlay-model-tile {
        padding: 16px 8px;
        gap: 8px;
    }

    .overlay-model-tile svg {
        width: 24px;
        height: 24px;
    }

    .overlay-model-name {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    /* Small Mobile */
    .header h1 {
        font-size: 16px;
    }

    .toolbar {
        padding: 6px 8px;
    }

    .tool-btn {
        padding: 6px;
    }

    .tool-btn svg {
        width: 16px;
        height: 16px;
    }

    .btn-primary {
        padding: 6px 10px;
        font-size: 12px;
    }

    .btn-primary svg {
        width: 14px;
        height: 14px;
    }

    .sidebar {
        width: 180px;
    }

    .sidebar-header h3 {
        font-size: 13px;
    }

    .model-item {
        font-size: 11px;
        padding: 6px;
    }

    .stats-overlay {
        font-size: 10px;
        padding: 6px 10px;
    }

    .model-overlay .overlay-header h2 {
        font-size: 16px;
    }

    .overlay-section h3 {
        font-size: 12px;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {
    .tool-btn,
    .btn-primary,
    .sidebar-toggle,
    .sidebar-expand-btn {
        min-height: 44px;
        min-width: 44px;
    }

    .model-item,
    .overlay-model-tile {
        min-height: 44px;
    }
}