/* SL Mesh Topology Tool - Styles */

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --border-color: #2a2a4a;
    --success: #4ade80;
    --error: #f87171;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Header */
header {
    background: var(--bg-secondary);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

header .stage-badge {
    background: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
}

/* Stage Tabs */
.stage-tabs {
    display: flex;
    gap: 0.5rem;
}

.stage-tab {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.stage-tab:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.stage-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.stage-tab:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Stale Stage Indicator */
.stage-tab.stale {
    position: relative;
}

.stage-tab.stale::after {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background: #f59e0b;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.stage-tab.stale:not(.active) {
    border-color: #f59e0b;
}

/* Boundary Overlay (Stage 1 preview - overlays SVG panel with transparency) */
.boundary-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 10;
}

.boundary-overlay-viewer {
    width: 100%;
    height: 100%;
}

.boundary-overlay-viewer canvas {
    width: 100% !important;
    height: 100% !important;
    background: transparent !important;
}

/* Main Layout */
.container {
    display: grid;
    grid-template-columns: 300px 1fr;
    height: calc(100vh - 60px);
}

/* Sidebar */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 1rem;
}

.sidebar h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Stage Description */
.stage-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: 4px;
    border-left: 3px solid var(--accent);
}

/* Parameter Groups */
.param-group {
    margin-bottom: 1.5rem;
}

.param-group h3 {
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

/* Form Controls */
.form-control {
    margin-bottom: 1rem;
}

.form-control label {
    display: block;
    font-size: 0.8125rem;
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
}

.form-control input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
}

.form-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.form-control input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
}

.form-control .value-display {
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

.form-control .form-hint {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    font-style: italic;
}

.form-control select {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-control select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-primary:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-block {
    width: 100%;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    margin: 1rem;
    transition: all 0.3s;
    cursor: pointer;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: rgba(233, 69, 96, 0.1);
}

.drop-zone-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.drop-zone h3 {
    margin-bottom: 0.5rem;
}

.drop-zone p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.drop-zone input[type="file"] {
    display: none;
}

/* Comparison View */
.comparison-container {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
    overflow: hidden;
}

.comparison-panel {
    background: var(--bg-secondary);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.comparison-panel h3 {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    font-size: 0.875rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.comparison-panel .panel-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: 1rem;
    background: repeating-conic-gradient(#222 0% 25%, #2a2a2a 0% 50%) 50% / 20px 20px;
    min-height: 0;
    cursor: grab;
}

.comparison-panel .panel-content:active {
    cursor: grabbing;
}

.comparison-panel img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform 0.1s ease-out;
}

.comparison-panel svg {
    max-width: 100%;
    max-height: 100%;
    width: auto !important;
    height: auto !important;
}

.comparison-panel .svg-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.1s ease-out;
}

.comparison-panel .svg-container svg {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.comparison-panel .empty-state {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Status Bar */
.status-bar {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.status-bar .status-left {
    display: flex;
    gap: 2rem;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Toast Messages */
.toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1001;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    gap: 0.25rem;
}

.zoom-controls button {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
}

.zoom-controls button:hover {
    background: var(--border-color);
}

/* File Info */
.file-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Action Buttons Row */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Stage Content */
.stage-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Path Viewer */
.path-viewer-container {
    flex: 1;
    display: flex;
    padding: 1rem;
    overflow: hidden;
}

.path-viewer-container .comparison-panel.full-width {
    flex: 1;
}

/* Path Controls */
.path-controls {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.path-controls .form-control label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.path-controls input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

/* Path Stats */
.path-stats {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.8125rem;
}

.path-stats h4 {
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.path-stats .stat-row {
    display: flex;
    justify-content: space-between;
    padding: 0.25rem 0;
    border-bottom: 1px solid var(--border-color);
}

.path-stats .stat-row:last-child {
    border-bottom: none;
}

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

.path-stats .stat-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* Loop Details List */
.loop-details-list {
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.loop-detail-row {
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 2px;
    align-items: center;
}

.loop-detail-row.outer {
    background: rgba(0, 255, 136, 0.1);
}

.loop-detail-row.hole {
    background: rgba(255, 68, 136, 0.1);
}

.loop-detail-row .loop-index {
    color: var(--text-secondary);
    min-width: 24px;
}

.loop-detail-row .loop-type {
    min-width: 40px;
    font-weight: 500;
}

.loop-detail-row.outer .loop-type {
    color: #00ff88;
}

.loop-detail-row.hole .loop-type {
    color: #ff4488;
}

.loop-detail-row .loop-shape {
    flex: 1;
    color: var(--text-secondary);
}

.loop-detail-row.curved .loop-shape {
    color: #44aaff;
}

.loop-detail-row.angular .loop-shape {
    color: #ffaa44;
}

.loop-detail-row .loop-verts {
    font-weight: 500;
    color: var(--text-primary);
}

/* Selection Controls */
.selection-controls h3 {
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.selection-info {
    background: rgba(255, 255, 0, 0.1);
    border: 1px solid rgba(255, 255, 0, 0.3);
    border-radius: 4px;
    padding: 0.5rem;
    margin: 0.5rem 0;
}

.selection-summary {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.selection-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.selection-actions .btn {
    flex: 1 1 auto;
    min-width: 80px;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

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

/* Export Buttons */
.export-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.export-buttons .btn {
    flex: 1 1 auto;
    min-width: 80px;
}

/* Font Controls */
.font-controls {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.font-controls h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.font-controls textarea {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    resize: vertical;
    min-height: 60px;
}

.font-controls textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.font-controls input[type="file"] {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.75rem;
    cursor: pointer;
}

.font-controls input[type="file"]::file-selector-button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 0.5rem;
}

.font-controls .form-control label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.font-controls input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

/* Mesh Controls */
.mesh-controls {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.mesh-controls h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mesh-controls .form-control label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.mesh-controls input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

/* Mesh Viewer Container */
.mesh-viewer-container {
    flex: 1;
    display: flex;
    padding: 1rem;
    overflow: hidden;
}

.mesh-viewer-container .comparison-panel.full-width {
    flex: 1;
}

.mesh-canvas {
    background: #1a1a2e !important;
    min-height: 400px;
}

.mesh-canvas canvas {
    width: 100% !important;
    height: 100% !important;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
    }

    .comparison-container {
        grid-template-columns: 1fr;
    }

    .stage-tabs {
        flex-wrap: wrap;
    }
}

/* Keyboard shortcut styling */
kbd {
    display: inline-block;
    padding: 0.15rem 0.4rem;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 0.65rem;
    color: var(--text-primary);
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, rgba(15, 52, 96, 0.8) 100%);
    border: 1px solid var(--border-color);
    border-bottom-width: 2px;
    border-radius: 4px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    min-width: 1.4rem;
    text-align: center;
}

/* Shortcuts panel */
.shortcuts-panel {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    margin: 0.75rem 0;
}

.shortcuts-header {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border-color);
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.shortcut-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.shortcut-group-title {
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.15rem;
}

.shortcut-row {
    display: grid;
    grid-template-columns: auto auto 1fr;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.shortcut-row span:first-of-type {
    font-size: 0.6rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

.shortcut-desc {
    text-align: right;
    color: var(--text-primary);
    font-size: 0.68rem;
}

/* Input Mode Toggle */
.input-mode-toggle {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.mode-btn {
    flex: 1;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

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

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

/* Input Controls */
.input-controls h2 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}