/* ═══════════════════════════════════════════════════════════════
   SPRITE EDITOR — Design System
   Dark glassmorphism theme with accent colors
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
    /* Surface colors */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2333;
    --bg-elevated: #21283b;
    --bg-hover: #2a3349;
    --bg-active: #33406060;

    /* Glass effect */
    --glass-bg: rgba(22, 27, 34, 0.85);
    --glass-border: rgba(110, 130, 180, 0.15);
    --glass-blur: 12px;

    /* Accent colors */
    --accent-primary: #58a6ff;
    --accent-secondary: #7ee8fa;
    --accent-success: #56d364;
    --accent-warning: #e3b341;
    --accent-danger: #f85149;
    --accent-purple: #bc8cff;

    /* Text */
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    --text-accent: #58a6ff;

    /* Borders */
    --border-default: rgba(110, 130, 180, 0.12);
    --border-hover: rgba(110, 130, 180, 0.3);
    --border-active: var(--accent-primary);

    /* Sizing */
    --toolbar-height: 44px;
    --panel-width: 260px;
    --timeline-height: 180px;
    --border-radius: 8px;
    --border-radius-sm: 5px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(88, 166, 255, 0.15);

    /* Transitions */
    --transition-fast: 0.12s ease;
    --transition-normal: 0.2s ease;
}

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

html,
body {
    height: 100%;
    overflow: hidden;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    user-select: none;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ── App Layout ───────────────────────────────────────────── */
#app {
    display: grid;
    grid-template-rows: var(--toolbar-height) 1fr var(--timeline-height);
    grid-template-columns: var(--panel-width) 1fr var(--panel-width);
    grid-template-areas:
        "toolbar toolbar toolbar"
        "left-panel canvas right-panel"
        "timeline timeline timeline";
    height: 100vh;
    gap: 1px;
    background: var(--border-default);
}

/* ── Top Toolbar ──────────────────────────────────────────── */
#toolbar {
    grid-area: toolbar;
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-default);
    z-index: 10;
}

.app-title {
    display: flex;
    align-items: baseline;
    gap: 6px;
    padding-right: 10px;
    border-right: 1px solid var(--border-default);
    margin-right: 4px;
}

.app-title-name {
    font-size: 14px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.3px;
}

.app-title-author {
    font-size: 10px;
    color: var(--text-tertiary);
    font-weight: 400;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0 6px;
}

.toolbar-group+.toolbar-group {
    border-left: 1px solid var(--border-default);
    margin-left: 4px;
    padding-left: 10px;
}

.toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    transition: all var(--transition-fast);
    position: relative;
}

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

.toolbar-btn.active {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.toolbar-btn[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 6px;
    padding: 4px 8px;
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 100;
}

.toolbar-btn[data-tooltip]:hover::after {
    opacity: 1;
}

.toolbar-label {
    font-size: 11px;
    color: var(--text-secondary);
    padding: 0 6px;
    font-weight: 500;
}

.toolbar-select {
    height: 28px;
    padding: 0 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    outline: none;
}

.toolbar-select:focus {
    border-color: var(--accent-primary);
}

.toolbar-input {
    width: 50px;
    height: 28px;
    padding: 0 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    text-align: center;
    outline: none;
}

.toolbar-input:focus {
    border-color: var(--accent-primary);
}

/* ── Tool Options Bar ─────────────────────────────────────── */
#tool-options {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 6px;
    border-right: 1px solid var(--border-default);
    margin-right: 4px;
}

#tool-options label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-secondary);
}

#filled-label {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0 4px;
}

/* ── Panels (Left & Right) ────────────────────────────────── */
.panel {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#left-panel {
    grid-area: left-panel;
    border-right: 1px solid var(--border-default);
}

#right-panel {
    grid-area: right-panel;
    border-left: 1px solid var(--border-default);
}

.panel-section {
    border-bottom: 1px solid var(--border-default);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-secondary);
}

.panel-header-actions {
    display: flex;
    gap: 2px;
}

.panel-header-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 3px;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-fast);
}

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

.panel-body {
    padding: 10px;
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
}

/* ── Color Swatches ───────────────────────────────────────── */
#color-preview {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
}

.color-swatch-stack {
    position: relative;
    width: 48px;
    height: 48px;
}

.color-swatch {
    position: absolute;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    border: 2px solid var(--border-hover);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.color-swatch:hover {
    transform: scale(1.1);
}

#primary-color {
    top: 0;
    left: 0;
    z-index: 2;
}

#secondary-color {
    bottom: 0;
    right: 0;
    z-index: 1;
}

#swap-colors {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    border: none;
    border-radius: 3px;
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
}

#color-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

#color-hex-input {
    width: 100%;
    height: 26px;
    padding: 0 6px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    outline: none;
}

#color-hex-input:focus {
    border-color: var(--accent-primary);
}

/* ── HSL Picker ───────────────────────────────────────────── */
#hsl-picker {
    padding: 10px 12px;
}

#hue-saturation-canvas {
    width: 100%;
    height: 140px;
    border-radius: var(--border-radius-sm);
    cursor: crosshair;
    border: 1px solid var(--border-default);
    margin-bottom: 8px;
}

#lightness-slider-container {
    position: relative;
    height: 16px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-default);
    cursor: pointer;
}

#lightness-slider-canvas {
    width: 100%;
    height: 100%;
}

/* ── Palette Grid ─────────────────────────────────────────── */
#palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(20px, 1fr));
    gap: 2px;
    padding: 0;
}

.palette-color {
    aspect-ratio: 1;
    border-radius: 3px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 0;
}

.palette-color:hover {
    border-color: var(--text-primary);
    transform: scale(1.15);
    z-index: 1;
}

.palette-color.active {
    border-color: #fff;
    box-shadow: 0 0 0 1px var(--accent-primary);
}

#palette-preset-select {
    width: 100%;
    margin-bottom: 8px;
}

/* ── Layer List ───────────────────────────────────────────── */
#layer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.layer-item {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 6px;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
    border: 1px solid transparent;
    overflow: hidden;
}

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

.layer-item.active {
    background: var(--bg-active);
    border-color: var(--accent-primary);
}

.layer-item.dragging {
    opacity: 0.5;
}

.layer-thumb {
    width: 24px;
    height: 24px;
    border-radius: 3px;
    border: 1px solid var(--border-default);
    background-image:
        linear-gradient(45deg, #2a2a3a 25%, transparent 25%),
        linear-gradient(-45deg, #2a2a3a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #2a2a3a 75%),
        linear-gradient(-45deg, transparent 75%, #2a2a3a 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    flex-shrink: 0;
    image-rendering: pixelated;
}

.layer-name {
    flex: 1;
    min-width: 0;
    font-size: 11px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    background: transparent;
    border: none;
    outline: none;
    font-family: inherit;
}

.layer-name:focus {
    background: var(--bg-tertiary);
    padding: 2px 4px;
    border-radius: 3px;
}

.layer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 3px;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 13px;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

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

.layer-btn.active {
    color: var(--accent-primary);
}

.layer-btn.hidden-icon {
    color: var(--text-tertiary);
    opacity: 0.4;
}

.layer-opacity {
    width: 32px;
    height: 14px;
    flex-shrink: 0;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    outline: none;
    cursor: pointer;
}

.layer-opacity::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: #0a0e14;
    border-radius: 2px;
    border: 1px solid rgba(88, 166, 255, 0.25);
}

.layer-opacity::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    margin-top: -4px;
}

.layer-opacity::-moz-range-track {
    width: 100%;
    height: 4px;
    background: #0a0e14;
    border-radius: 2px;
    border: 1px solid rgba(88, 166, 255, 0.25);
}

.layer-opacity::-moz-range-thumb {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: none;
}

.layer-grip {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 22px;
    flex-shrink: 0;
    color: var(--text-tertiary);
    font-size: 12px;
    cursor: grab;
    border-radius: 3px;
    transition: all var(--transition-fast);
    user-select: none;
    letter-spacing: -1px;
}

.layer-grip:hover {
    color: var(--text-secondary);
    background: var(--bg-hover);
}

.layer-grip:active {
    cursor: grabbing;
}

/* ── Canvas Area ──────────────────────────────────────────── */
#canvas-area {
    grid-area: canvas;
    position: relative;
    overflow: hidden;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    /* subtle grid background */
    background-image:
        radial-gradient(circle, rgba(88, 166, 255, 0.03) 1px, transparent 1px);
    background-size: 24px 24px;
}

#canvas-container {
    position: relative;
    image-rendering: pixelated;
}

#sprite-canvas {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    border: 1px solid var(--border-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

#overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    pointer-events: none;
    z-index: 2;
}

#canvas-cursor {
    position: absolute;
    pointer-events: none;
    border: 1px solid rgba(255, 255, 255, 0.6);
    z-index: 5;
}

/* Zoom indicator */
#zoom-indicator {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-default);
    border-radius: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-secondary);
    z-index: 5;
}

#zoom-indicator button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    padding: 2px;
}

#zoom-indicator button:hover {
    color: var(--text-primary);
}

/* Canvas coordinates */
#canvas-coords {
    position: absolute;
    bottom: 12px;
    left: 12px;
    padding: 4px 10px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-default);
    border-radius: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-secondary);
    z-index: 5;
}

/* ── Timeline ─────────────────────────────────────────────── */
#timeline {
    grid-area: timeline;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-default);
}

#timeline-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-bottom: 1px solid var(--border-default);
    background: var(--bg-secondary);
}

.timeline-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-fast);
}

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

.timeline-btn.active {
    background: var(--accent-primary);
    color: #fff;
}

.timeline-btn.play-btn {
    width: 34px;
    height: 34px;
    font-size: 18px;
    border-radius: 50%;
}

.timeline-separator {
    width: 1px;
    height: 20px;
    background: var(--border-default);
    margin: 0 4px;
}

#fps-control {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
}

#fps-control label {
    font-size: 11px;
    color: var(--text-secondary);
}

#fps-slider {
    width: 70px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-elevated);
    border-radius: 2px;
    outline: none;
}

#fps-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-secondary);
    cursor: pointer;
}

#fps-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-primary);
    min-width: 28px;
}

#onion-skin-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

#tag-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
}

.onion-settings {
    display: flex;
    align-items: center;
    gap: 6px;
}

.onion-settings label {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: default;
}

/* Frame strip */
#frame-strip-container {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 8px 12px;
}

#frame-strip {
    display: flex;
    gap: 6px;
    height: 100%;
    align-items: flex-start;
}

.frame-thumb {
    flex-shrink: 0;
    width: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.frame-thumb-canvas {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-sm);
    border: 2px solid transparent;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    background-image:
        linear-gradient(45deg, #1a1a2a 25%, transparent 25%),
        linear-gradient(-45deg, #1a1a2a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1a1a2a 75%),
        linear-gradient(-45deg, transparent 75%, #1a1a2a 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.frame-thumb:hover .frame-thumb-canvas {
    border-color: var(--border-hover);
}

.frame-thumb.active .frame-thumb-canvas {
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px rgba(88, 166, 255, 0.3);
}

.frame-thumb.selected .frame-thumb-canvas {
    border-color: rgba(200, 140, 255, 0.8);
    box-shadow: 0 0 10px rgba(200, 140, 255, 0.25);
}

.frame-thumb.selected.active .frame-thumb-canvas {
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px rgba(88, 166, 255, 0.3), 0 0 0 3px rgba(200, 140, 255, 0.35);
}

.frame-thumb.dragging {
    opacity: 0.4;
}

.frame-thumb.drop-before {
    position: relative;
}

.frame-thumb.drop-before::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-primary);
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(88, 166, 255, 0.6);
    z-index: 10;
}

.frame-thumb.drop-after {
    position: relative;
}

.frame-thumb.drop-after::after {
    content: '';
    position: absolute;
    right: -4px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-primary);
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(88, 166, 255, 0.6);
    z-index: 10;
}

.frame-label {
    font-size: 10px;
    color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}

.frame-duration {
    font-size: 10px;
    color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
}

.frame-duration:hover {
    color: var(--text-secondary);
}

/* Frame tag markers */
.frame-tag {
    height: 3px;
    width: 100%;
    border-radius: 2px;
    margin-top: 2px;
}

/* Add frame button */
.add-frame-btn {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-sm);
    border: 2px dashed var(--border-default);
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.add-frame-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(88, 166, 255, 0.05);
}

/* ── Modal / Dialog ───────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 24px;
    min-width: 320px;
    max-width: 480px;
    transform: translateY(10px);
    transition: transform var(--transition-normal);
}

.modal-overlay.visible .modal {
    transform: translateY(0);
}

.modal h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.modal-field {
    margin-bottom: 12px;
}

.modal-field label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.modal-field input,
.modal-field select {
    width: 100%;
    height: 32px;
    padding: 0 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13px;
    outline: none;
}

.modal-field input:focus,
.modal-field select:focus {
    border-color: var(--accent-primary);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
}

.btn {
    padding: 6px 16px;
    border-radius: var(--border-radius-sm);
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-default);
}

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

.btn-primary:hover {
    background: #4a98f0;
}

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

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

/* ── Context Menu ─────────────────────────────────────────── */
.context-menu {
    position: fixed;
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-md);
    padding: 4px;
    z-index: 1001;
    min-width: 160px;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border: none;
    border-radius: 3px;
    background: transparent;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: background var(--transition-fast);
}

.context-menu-item:hover {
    background: var(--accent-primary);
    color: #fff;
}

.context-menu-item .shortcut {
    margin-left: auto;
    font-size: 11px;
    color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}

.context-menu-item:hover .shortcut {
    color: rgba(255, 255, 255, 0.7);
}

.context-menu-divider {
    height: 1px;
    background: var(--border-default);
    margin: 4px 0;
}

/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(8px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

.playing-indicator {
    animation: pulse 0.8s ease-in-out infinite;
}

/* ── Utility ──────────────────────────────────────────────── */
.hidden {
    display: none !important;
}

.checkerboard {
    background-image:
        linear-gradient(45deg, #2a2a3a 25%, transparent 25%),
        linear-gradient(-45deg, #2a2a3a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #2a2a3a 75%),
        linear-gradient(-45deg, transparent 75%, #2a2a3a 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
}

/* ── New Canvas Dialog ────────────────────────────────────── */
#new-canvas-dialog .size-presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-bottom: 12px;
}

.size-preset-btn {
    padding: 6px 4px;
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-fast);
}

.size-preset-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}