/* ============================================
   SnapLayout — Room Layout Planner
   Dark/light glassmorphism theme
   ============================================ */

/* --- Fonts --- */
@font-face {
    font-family: 'Xolonium';
    src: url('../../fonts/Xolonium-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* --- CSS Custom Properties --- */
:root {
    /* Colors */
    --color-bg: #0a0a1a;
    --color-bg-gradient: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 50%, #0a0a1a 100%);
    --color-surface: rgba(255, 255, 255, 0.06);
    --color-surface-hover: rgba(255, 255, 255, 0.1);
    --color-surface-active: rgba(255, 255, 255, 0.14);
    --color-text: #e8e8f0;
    --color-text-muted: rgba(232, 232, 240, 0.6);
    --color-text-soft: rgba(232, 232, 240, 0.45);
    --color-accent: #4a5aff;
    --color-accent-rgb: 74, 90, 255;
    --color-accent-light: #8b9aff;
    --color-danger: #ff4a5a;
    --color-danger-hover: #ff6b78;

    /* Canvas */
    --color-canvas-bg: #12122a;
    --color-grid: rgba(255, 255, 255, 0.04);
    --color-grid-major: rgba(255, 255, 255, 0.08);
    --color-wall: #ff6b6b;
    --color-wall-preview: rgba(255, 107, 107, 0.5);
    --color-scale-line: #ffd93d;
    --color-furniture-fill: rgba(100, 120, 255, 0.25);
    --color-furniture-stroke: rgba(100, 120, 255, 0.6);
    --color-furniture-selected: rgba(100, 120, 255, 0.45);
    --color-furniture-text: rgba(232, 232, 240, 0.9);
    --color-snap-guide: rgba(100, 120, 255, 0.4);

    /* Glass */
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-bg-hover: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-light: rgba(255, 255, 255, 0.15);
    --glass-blur: 12px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;

    /* Layout */
    --header-height: 72px;
    --toolbar-height: 44px;
    --furniture-bar-height: 88px;
    --footer-height: 36px;
    --properties-width: 260px;

    /* Focus */
    --focus-ring: 0 0 0 2px rgba(74, 90, 255, 0.6);
    --focus-outline: 2px solid rgba(74, 90, 255, 0.6);

    /* Modal */
    --modal-overlay-bg: rgba(0, 0, 0, 0.6);
    --modal-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
    touch-action: none;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
    background: var(--color-bg-gradient);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- App Container --- */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

/* --- Header --- */
.app-header {
    flex-shrink: 0;
    padding: 8px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.app-title {
    font-family: 'Xolonium', 'Inter', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-sub {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.header-dot {
    color: var(--color-text-soft);
}

/* --- Icon Buttons --- */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--color-text);
    font-size: 1rem;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.icon-btn:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-light);
}

.icon-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

/* --- Unit Select --- */
.unit-select {
    height: 34px;
    padding: 0 8px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.unit-select:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

.unit-select option {
    background: #1a1a3e;
    color: var(--color-text);
}

/* --- Main --- */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

/* --- Toolbar --- */
.toolbar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.toolbar::-webkit-scrollbar {
    display: none;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.tool-separator {
    width: 1px;
    height: 24px;
    margin: 0 4px;
    background: var(--glass-border);
    flex-shrink: 0;
}

.tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: transparent;
    color: var(--color-text-muted);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

.tool-btn.active {
    background: rgba(var(--color-accent-rgb), 0.2);
    color: var(--color-accent-light);
    border-color: rgba(var(--color-accent-rgb), 0.3);
}

.tool-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

.tool-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

/* --- Canvas --- */
.canvas-wrapper {
    flex: 1;
    position: relative;
    min-height: 0;
    overflow: hidden;
    background: var(--color-canvas-bg);
}

.canvas-wrapper canvas {
    display: block;
}

/* --- Drop Zone --- */
.drop-zone {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 2;
}

.drop-zone.hidden {
    display: none;
}

.drop-zone.drag-over {
    background: rgba(var(--color-accent-rgb), 0.1);
    border: 2px dashed var(--color-accent);
    pointer-events: auto;
}

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

.drop-zone-icon {
    font-size: 3rem;
    margin-bottom: 12px;
    opacity: 0.5;
}

.drop-zone-hint {
    font-size: 0.75rem;
    color: var(--color-text-soft);
    margin-top: 4px;
}

/* --- Furniture Bar --- */
.furniture-bar {
    flex-shrink: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-top: 1px solid var(--glass-border);
}

.furniture-tabs {
    display: flex;
    gap: 2px;
    padding: 4px 8px 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.furniture-tabs::-webkit-scrollbar {
    display: none;
}

.furniture-tab {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border: none;
    border-radius: 8px 8px 0 0;
    background: transparent;
    color: var(--color-text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.furniture-tab:hover {
    background: var(--glass-bg-hover);
    color: var(--color-text);
}

.furniture-tab.active {
    background: rgba(var(--color-accent-rgb), 0.15);
    color: var(--color-accent-light);
}

.furniture-tab:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

.furniture-items {
    display: flex;
    gap: 6px;
    padding: 6px 8px 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.furniture-items::-webkit-scrollbar {
    display: none;
}

.furniture-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px 10px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--color-text-muted);
    font-family: inherit;
    font-size: 0.65rem;
    cursor: pointer;
    white-space: nowrap;
    min-width: 64px;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.furniture-item:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-light);
    color: var(--color-text);
}

.furniture-item:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

.furniture-item-preview {
    width: 40px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.furniture-item-preview .preview-shape {
    border: 1.5px solid var(--color-furniture-stroke);
    background: var(--color-furniture-fill);
}

.furniture-item-preview .preview-rect {
    border-radius: 2px;
}

.furniture-item-preview .preview-circle {
    border-radius: 50%;
}

.furniture-item-preview .preview-room {
    border-color: var(--color-wall);
    background: rgba(255, 107, 107, 0.08);
    border-width: 2px;
    border-radius: 0;
}

.furniture-item-preview .preview-door {
    border-color: var(--color-scale-line);
    background: var(--color-canvas-bg);
    border-radius: 0;
}

.furniture-item-preview .preview-window {
    border-color: #64b4ff;
    background: rgba(100, 180, 255, 0.15);
    border-radius: 0;
}

/* --- Properties Panel --- */
.properties-panel {
    position: fixed;
    right: 0;
    top: var(--header-height);
    bottom: 0;
    width: var(--properties-width);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-left: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 20;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.properties-panel.open {
    transform: translateX(0);
}

.properties-panel[hidden] {
    display: none;
}

.properties-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--glass-border);
}

.properties-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.properties-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.prop-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.prop-row label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    min-width: 40px;
}

.prop-row input {
    flex: 1;
    height: 32px;
    padding: 0 8px;
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.8rem;
}

.prop-row input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--focus-ring);
}

.prop-unit {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    min-width: 20px;
}

.prop-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

/* --- Action Buttons --- */
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--glass-bg);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-light);
}

.action-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

.action-btn-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
    width: 100%;
    margin-top: 8px;
}

.action-btn-primary:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
}

.action-btn-danger {
    color: var(--color-danger);
    border-color: rgba(255, 74, 90, 0.3);
}

.action-btn-danger:hover {
    background: rgba(255, 74, 90, 0.15);
    color: var(--color-danger-hover);
}

.confirm-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.confirm-actions .action-btn {
    flex: 1;
}

/* --- Footer --- */
.app-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 0.7rem;
    color: var(--color-text-muted);
    background: var(--glass-bg);
    border-top: 1px solid var(--glass-border);
}

.app-footer a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.app-footer a:hover {
    color: var(--color-accent-light);
}

.footer-dot {
    color: var(--color-text-soft);
}

/* --- Modals --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--modal-overlay-bg);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 100;
    animation: fadeIn 0.2s ease;
}

.modal-overlay[hidden] {
    display: none;
}

.modal-content {
    width: 90%;
    max-width: 480px;
    max-height: 85vh;
    overflow-y: auto;
    background: var(--color-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--modal-shadow);
    animation: slideUp 0.25s ease;
}

.modal-narrow {
    max-width: 360px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--color-text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--glass-bg-hover);
    color: var(--color-text);
}

.modal-close:focus-visible {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

.modal-body {
    padding: 20px;
}

/* --- Import Modal --- */
.import-drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 16px;
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    text-align: center;
    transition: all var(--transition-fast);
}

.import-drop-zone.drag-over {
    border-color: var(--color-accent);
    background: rgba(var(--color-accent-rgb), 0.1);
}

.import-file-label {
    margin-top: 12px;
    cursor: pointer;
}

.import-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    color: var(--color-text-soft);
    font-size: 0.8rem;
}

.import-divider::before,
.import-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

.import-url-row {
    display: flex;
    gap: 8px;
}

.import-url-input {
    flex: 1;
    height: 38px;
    padding: 0 12px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.85rem;
}

.import-url-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--focus-ring);
}

.import-hint {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--color-text-soft);
    text-align: center;
}

/* --- Scale Modal --- */
.scale-input-row {
    display: flex;
    gap: 8px;
    margin: 16px 0;
}

.scale-input {
    flex: 1;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    font-size: 1rem;
}

.scale-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--focus-ring);
}

/* --- Export Modal --- */
.export-preview {
    margin-bottom: 16px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.export-preview img {
    width: 100%;
    display: block;
}

.export-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

.export-filename-input {
    flex: 1;
    height: 38px;
    padding: 0 12px;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.85rem;
}

.export-filename-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--focus-ring);
}

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

/* --- Help Modal --- */
.help-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.help-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.help-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(var(--color-accent-rgb), 0.2);
    color: var(--color-accent-light);
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.help-step p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.help-step strong {
    color: var(--color-text);
}

.help-shortcuts {
    margin-top: 8px;
}

.help-shortcuts h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.shortcut-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 6px 16px;
    align-items: center;
}

.shortcut-grid kbd {
    display: inline-block;
    padding: 2px 8px;
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    background: var(--color-surface);
    font-family: inherit;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
    min-width: 32px;
}

.shortcut-grid span {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --- Screen Reader Only --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* --- Wall drawing cursor --- */
.canvas-wrapper.tool-wall {
    cursor: crosshair;
}

.canvas-wrapper.tool-scale {
    cursor: crosshair;
}

.canvas-wrapper.tool-pan {
    cursor: grab;
}

.canvas-wrapper.tool-pan:active {
    cursor: grabbing;
}

/* --- Scale indicator --- */
.scale-indicator {
    position: absolute;
    bottom: 8px;
    left: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 6px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    pointer-events: none;
    z-index: 5;
}

/* ============================================
   Light Theme
   ============================================ */
@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #d8dae8;
        --color-bg-gradient: linear-gradient(135deg, #d8dae8 0%, #c8cade 50%, #d8dae8 100%);
        --color-surface: rgba(0, 0, 0, 0.05);
        --color-surface-hover: rgba(0, 0, 0, 0.08);
        --color-surface-active: rgba(0, 0, 0, 0.12);
        --color-text: #1a1a2e;
        --color-text-muted: rgba(26, 26, 46, 0.65);
        --color-text-soft: rgba(26, 26, 46, 0.45);
        --color-canvas-bg: #dddee8;
        --color-grid: rgba(0, 0, 0, 0.07);
        --color-grid-major: rgba(0, 0, 0, 0.14);
        --color-furniture-fill: rgba(74, 90, 255, 0.15);
        --color-furniture-stroke: rgba(74, 90, 255, 0.5);
        --color-furniture-selected: rgba(74, 90, 255, 0.3);
        --color-furniture-text: rgba(26, 26, 46, 0.85);
        --glass-bg: rgba(255, 255, 255, 0.4);
        --glass-bg-hover: rgba(255, 255, 255, 0.55);
        --glass-border: rgba(0, 0, 0, 0.12);
        --glass-border-light: rgba(0, 0, 0, 0.18);
        --modal-overlay-bg: rgba(0, 0, 0, 0.3);
        --modal-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    }

    .unit-select option {
        background: #d8dae8;
        color: #1a1a2e;
    }
}

html.light-theme {
    --color-bg: #d8dae8;
    --color-bg-gradient: linear-gradient(135deg, #d8dae8 0%, #c8cade 50%, #d8dae8 100%);
    --color-surface: rgba(0, 0, 0, 0.05);
    --color-surface-hover: rgba(0, 0, 0, 0.08);
    --color-surface-active: rgba(0, 0, 0, 0.12);
    --color-text: #1a1a2e;
    --color-text-muted: rgba(26, 26, 46, 0.65);
    --color-text-soft: rgba(26, 26, 46, 0.45);
    --color-canvas-bg: #dddee8;
    --color-grid: rgba(0, 0, 0, 0.07);
    --color-grid-major: rgba(0, 0, 0, 0.14);
    --color-furniture-fill: rgba(74, 90, 255, 0.15);
    --color-furniture-stroke: rgba(74, 90, 255, 0.5);
    --color-furniture-selected: rgba(74, 90, 255, 0.3);
    --color-furniture-text: rgba(26, 26, 46, 0.85);
    --glass-bg: rgba(255, 255, 255, 0.4);
    --glass-bg-hover: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(0, 0, 0, 0.12);
    --glass-border-light: rgba(0, 0, 0, 0.18);
    --modal-overlay-bg: rgba(0, 0, 0, 0.3);
    --modal-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
}

html.light-theme .unit-select option {
    background: #d8dae8;
    color: #1a1a2e;
}

html.dark-theme {
    --color-bg: #0a0a1a;
    --color-bg-gradient: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 50%, #0a0a1a 100%);
    --color-surface: rgba(255, 255, 255, 0.06);
    --color-surface-hover: rgba(255, 255, 255, 0.1);
    --color-surface-active: rgba(255, 255, 255, 0.14);
    --color-text: #e8e8f0;
    --color-text-muted: rgba(232, 232, 240, 0.6);
    --color-text-soft: rgba(232, 232, 240, 0.45);
    --color-canvas-bg: #12122a;
    --color-grid: rgba(255, 255, 255, 0.04);
    --color-grid-major: rgba(255, 255, 255, 0.08);
    --color-furniture-fill: rgba(100, 120, 255, 0.25);
    --color-furniture-stroke: rgba(100, 120, 255, 0.6);
    --color-furniture-selected: rgba(100, 120, 255, 0.45);
    --color-furniture-text: rgba(232, 232, 240, 0.9);
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-bg-hover: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-light: rgba(255, 255, 255, 0.15);
    --modal-overlay-bg: rgba(0, 0, 0, 0.6);
    --modal-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

html.dark-theme .unit-select option {
    background: #1a1a3e;
    color: #e8e8f0;
}

/* ============================================
   Responsive — Mobile
   ============================================ */
@media (max-width: 767px) {
    .app-title {
        font-size: 1rem;
    }

    .icon-btn {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }

    .unit-select {
        height: 32px;
        padding: 0 6px;
        font-size: 0.75rem;
    }

    .tool-btn {
        width: 34px;
        height: 34px;
        font-size: 0.9rem;
    }

    .furniture-tab {
        padding: 5px 10px;
        font-size: 0.7rem;
    }

    .furniture-item {
        padding: 5px 8px;
        font-size: 0.6rem;
        min-width: 56px;
    }

    /* Properties panel as bottom sheet on mobile */
    .properties-panel {
        top: auto;
        right: 0;
        left: 0;
        bottom: 0;
        width: 100%;
        max-height: 50vh;
        border-left: none;
        border-top: 1px solid var(--glass-border);
        border-radius: 16px 16px 0 0;
        transform: translateY(100%);
    }

    .properties-panel.open {
        transform: translateY(0);
    }

    .prop-actions {
        flex-direction: row;
    }

    .prop-actions .action-btn {
        flex: 1;
    }

    .app-footer {
        font-size: 0.6rem;
        padding: 6px 12px;
    }
}

@media (max-width: 360px) {
    .header-buttons {
        gap: 4px;
    }

    .tool-btn {
        width: 30px;
        height: 30px;
        font-size: 0.85rem;
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}