/**
 * EMOTIVE ENGINE - Shared Example Styles
 *
 * Common CSS for 3D demo examples with responsive three-panel layout.
 * Import this file and customize accent colors via CSS variables.
 *
 * Usage:
 *   <link rel="stylesheet" href="../example-style.css">
 *   <style>
 *     :root { --accent: #6ee7ff; --accent-rgb: 100, 200, 255; }
 *   </style>
 */

/* ═══════════════════════════════════════════════════════════════════════════
   CSS VARIABLES - Override these in your HTML for custom theming
   ═══════════════════════════════════════════════════════════════════════════ */
:root {
    --accent: #6ee7ff;
    --accent-rgb: 100, 200, 255;
    --bg-panel: rgba(0, 0, 0, 0.3);
    --bg-button: rgba(255, 255, 255, 0.05);
    --bg-button-hover: rgba(255, 255, 255, 0.15);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: white;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    /* Force dark mode for all native UI elements (dropdowns, scrollbars, etc.) */
    color-scheme: dark;
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════════════════════════════════════ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    width: 100%;
    height: 100vh;
    display: flex;
    overflow: hidden;
    /* Disable 300ms tap delay on mobile (iOS Safari, Chrome) */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* ═══════════════════════════════════════════════════════════════════════════
   THREE-PANEL LAYOUT
   ═══════════════════════════════════════════════════════════════════════════ */
.left-menu,
.right-menu {
    width: 18vw;
    min-width: 200px;
    max-width: 280px;
    background: var(--bg-panel);
    backdrop-filter: blur(10px);
    padding: 1.5vw;
    overflow-y: auto;
    overflow-x: hidden;
}

.left-menu {
    border-right: 1px solid var(--border-color);
}

.right-menu {
    border-left: 1px solid var(--border-color);
}

.center-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    padding: 2vmin;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════════════════════════════════ */
.section {
    margin-bottom: clamp(15px, 2vw, 25px);
    padding-bottom: clamp(12px, 1.5vw, 20px);
    border-bottom: 1px solid var(--border-color);
}

.section:last-child {
    border-bottom: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
   COLLAPSIBLE HEADERS
   ═══════════════════════════════════════════════════════════════════════════ */
h2 {
    font-size: clamp(11px, 1vw, 13px);
    margin-bottom: clamp(8px, 1vw, 12px);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

h2:hover {
    color: var(--text-primary);
}

h2::after {
    content: '\2212'; /* minus sign */
    font-size: clamp(14px, 1.2vw, 18px);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.5);
    transition: transform 0.2s;
}

h2.collapsed::after {
    content: '+';
}

.section-content {
    overflow: visible;
    transition: max-height 0.3s ease-out, opacity 0.2s ease-out;
    max-height: 1000px;
    opacity: 1;
}

.section-content.collapsed {
    max-height: 0;
    opacity: 0;
    margin-bottom: 0;
    overflow: hidden;
}

/* ═══════════════════════════════════════════════════════════════════════════
   BUTTON GRID
   ═══════════════════════════════════════════════════════════════════════════ */
.button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(5px, 0.6vw, 8px);
    margin-bottom: clamp(8px, 1vw, 12px);
}

button {
    padding: clamp(6px, 0.7vw, 10px) clamp(3px, 0.4vw, 6px);
    background: var(--bg-button);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: clamp(6px, 0.6vw, 8px);
    cursor: pointer;
    font-size: clamp(9px, 0.8vw, 11px);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(2px, 0.3vw, 4px);
    min-width: 0;
    width: 100%;
}

button:hover {
    background: var(--bg-button-hover);
    border-color: rgba(var(--accent-rgb), 0.5);
}

button.active {
    background: rgba(var(--accent-rgb), 0.3);
    border-color: rgba(var(--accent-rgb), 0.8);
}

/* ═══════════════════════════════════════════════════════════════════════════
   SLIDERS
   ═══════════════════════════════════════════════════════════════════════════ */
.slider-control {
    margin-bottom: clamp(10px, 1vw, 12px);
}

.slider-label {
    display: flex;
    justify-content: space-between;
    font-size: clamp(9px, 0.8vw, 10px);
    color: var(--text-muted);
    margin-bottom: clamp(4px, 0.4vw, 5px);
}

.slider-value {
    color: var(--accent);
    font-family: monospace;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 3px;
    transition: background 0.15s ease;
}

.slider-value:hover {
    background: rgba(var(--accent-rgb), 0.15);
}

/* Precision popup for regular sliders */
.slider-precision-popup {
    position: fixed;
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.98) 0%, rgba(10, 10, 18, 0.99) 100%);
    border: 1px solid rgba(var(--accent-rgb), 0.4);
    border-radius: 8px;
    padding: 12px;
    z-index: 10000;
    min-width: 200px;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.05),
        0 0 20px rgba(var(--accent-rgb), 0.2);
    backdrop-filter: blur(10px);
}

.slider-precision-popup::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    border-radius: 8px 0 0 8px;
    box-shadow: 0 0 12px var(--accent);
}

.slider-precision-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.slider-precision-title {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.slider-precision-close {
    padding: 4px 10px;
    background: rgba(var(--accent-rgb), 0.2);
    border: 1px solid rgba(var(--accent-rgb), 0.5);
    border-radius: 4px;
    color: var(--accent);
    cursor: pointer;
    font-size: 10px;
    font-weight: 600;
    transition: all 0.15s ease;
}

.slider-precision-close:hover {
    background: rgba(var(--accent-rgb), 0.3);
    border-color: var(--accent);
}

.slider-precision-value {
    font-size: 24px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-weight: 600;
    color: var(--accent);
    text-align: center;
    padding: 6px;
    margin-bottom: 10px;
}

.slider-precision-fader {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.slider-precision-fader .fader-step {
    width: 32px;
    height: 32px;
    font-size: 18px;
    flex-shrink: 0;
}

.slider-precision-slider {
    flex: 1;
    height: 28px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 14px;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.slider-precision-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(145deg, #fff 0%, #ddd 100%);
    border-radius: 50%;
    cursor: grab;
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.3),
        0 0 0 2px rgba(var(--accent-rgb), 0.4);
}

.slider-precision-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(145deg, #fff 0%, #ddd 100%);
    border-radius: 50%;
    cursor: grab;
    border: none;
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.3),
        0 0 0 2px rgba(var(--accent-rgb), 0.4);
}

.slider-precision-range {
    display: flex;
    justify-content: space-between;
    font-size: 9px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: rgba(255, 255, 255, 0.35);
}

.slider,
input[type="range"] {
    width: 100%;
    height: clamp(20px, 1.5vw, 22px);
    background: rgba(0, 0, 0, 0.3);
    border-radius: clamp(4px, 0.4vw, 5px);
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: clamp(14px, 1.2vw, 16px);
    height: clamp(14px, 1.2vw, 16px);
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: clamp(14px, 1.2vw, 16px);
    height: clamp(14px, 1.2vw, 16px);
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
   TOGGLE SWITCHES - Pill/tag style (like selection chips)
   ═══════════════════════════════════════════════════════════════════════════ */
.toggle-control {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: clamp(8px, 0.8vw, 12px);
    background: var(--bg-button);
    border-radius: clamp(6px, 0.6vw, 8px);
    margin-bottom: clamp(8px, 0.8vw, 12px);
}

.toggle-label {
    font-size: clamp(10px, 0.9vw, 12px);
    color: var(--text-secondary);
}

/* Pill-style toggle (header inline toggles) */
.toggle-switch {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 4px 12px;
    height: 22px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 11px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.4);
}

/* Checkmark icon - always present but hidden when inactive */
.toggle-switch::before {
    content: '✓';
    font-size: 11px;
    font-weight: 700;
    opacity: 0;
    margin-right: -2px;
    transition: opacity 0.2s ease;
}

.toggle-switch:hover {
    border-color: rgba(255, 255, 255, 0.35);
    color: rgba(255, 255, 255, 0.6);
}

.toggle-switch.active {
    background: transparent;
    border-color: var(--accent);
    color: var(--accent);
}

.toggle-switch.active::before {
    opacity: 1;
}

/* Header with toggle - proper spacing between title, toggle, and collapse icon */
.section h2.has-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
}

.section h2.has-toggle > span:first-child {
    flex: 0 0 auto;
}

.section h2.has-toggle > .toggle-switch {
    flex: 0 0 auto;
}

/* Push the collapse icon (::after) to the right */
.section h2.has-toggle::after {
    margin-left: auto;
}

/* ═══════════════════════════════════════════════════════════════════════════
   INFO BOX
   ═══════════════════════════════════════════════════════════════════════════ */
.info-box {
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: clamp(8px, 0.8vw, 10px);
    padding: clamp(10px, 1vw, 12px);
    font-size: clamp(10px, 0.85vw, 11px);
    color: var(--text-muted);
    line-height: 1.5;
}

.info-box strong {
    color: var(--accent);
}

/* ═══════════════════════════════════════════════════════════════════════════
   ANIMATION CONTAINER (generic)
   ═══════════════════════════════════════════════════════════════════════════ */
.animation-container,
#mascot-container,
#crystal-container,
#sun-container,
#animation-container {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    aspect-ratio: 1;
    border-radius: clamp(12px, 1.5vw, 20px);
    box-shadow: 0 0 60px rgba(var(--accent-rgb), 0.15);
    touch-action: none;
}

.animation-container canvas,
#mascot-container canvas,
#crystal-container canvas,
#sun-container canvas,
#animation-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ─────────────────────────────────────────────────────────────────────────────
   CAMERA CONTROLS HINT - Fade-out tooltip on first load
   ───────────────────────────────────────────────────────────────────────────── */
.center-content {
    position: relative;
}

.camera-hint {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.8);
    pointer-events: none;
    z-index: 10;
    opacity: 1;
    animation: cameraHintFade 4s ease-out forwards;
    white-space: nowrap;
}

.camera-hint::before {
    content: '🎥 ';
}

@keyframes cameraHintFade {
    0% { opacity: 0; transform: translateX(-50%) translateY(10px); }
    10% { opacity: 1; transform: translateX(-50%) translateY(0); }
    70% { opacity: 1; }
    100% { opacity: 0; visibility: hidden; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   MOBILE RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 1000px) {
    body {
        display: flex;
        flex-direction: column;
        overflow-y: auto;
        height: 100vh;
    }

    /* Animation frame: ALWAYS visible at top, never pushed up */
    .center-content {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        height: 40vh;
        min-height: 250px;
        width: 100%;
        padding: 10px;
        background: inherit;
    }

    /* Spacer to push menus below the fixed animation frame */
    .left-menu {
        margin-top: max(40vh, 250px); /* Match .center-content height */
    }

    .left-menu,
    .right-menu {
        flex: 0 0 auto;
        width: 100%;
        max-width: none;
        min-width: 0;
        overflow: visible;
        border: none;
        border-bottom: 1px solid var(--border-color);
        padding: 15px;
    }

    .right-menu {
        border-bottom: none;
        border-top: 1px solid var(--border-color);
    }

    .button-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 600px) {
    .button-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .left-menu,
    .right-menu {
        padding: 12px;
    }

    /* Smaller animation frame on small phones */
    .center-content {
        height: 35vh;
        min-height: 200px;
    }

    /* Adjust spacer for smaller animation frame */
    .left-menu {
        margin-top: max(35vh, 200px);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SCROLLBAR STYLING
   ═══════════════════════════════════════════════════════════════════════════ */
.left-menu::-webkit-scrollbar,
.right-menu::-webkit-scrollbar {
    width: 6px;
}

.left-menu::-webkit-scrollbar-track,
.right-menu::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

.left-menu::-webkit-scrollbar-thumb,
.right-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.left-menu::-webkit-scrollbar-thumb:hover,
.right-menu::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ═══════════════════════════════════════════════════════════════════════════
   TOGGLE BUTTONS - Grid buttons with checkmark indicator (like header toggles)
   ═══════════════════════════════════════════════════════════════════════════ */
button.toggle-btn {
    position: relative;
    padding-left: clamp(18px, 1.5vw, 22px);
}

/* Checkmark - hidden when inactive */
button.toggle-btn::before {
    content: '✓';
    position: absolute;
    left: clamp(4px, 0.5vw, 6px);
    font-size: clamp(9px, 0.8vw, 10px);
    font-weight: 700;
    opacity: 0;
    transition: opacity 0.2s ease;
    color: inherit;
}

button.toggle-btn.active::before {
    opacity: 1;
}

/* ═══════════════════════════════════════════════════════════════════════════
   VISUAL CONTROLS - Uses toggle-control pattern (same as Soul Animation)
   ═══════════════════════════════════════════════════════════════════════════ */
.visual-controls .section-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Remove bottom margin on toggle-controls inside visual-controls for tighter spacing */
.visual-controls .toggle-control {
    margin-bottom: 0;
    border-radius: 0;
    background: transparent;
    padding: clamp(8px, 0.8vw, 10px) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.visual-controls .toggle-control:last-child {
    border-bottom: none;
}

.visual-controls .toggle-control:first-child {
    padding-top: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   EMOTION GRID (alias for button-grid with emotion-specific styling)
   ═══════════════════════════════════════════════════════════════════════════ */
.emotion-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(6px, 0.6vw, 8px);
}

.emotion-grid button {
    padding: clamp(8px, 0.8vw, 12px);
    font-size: clamp(9px, 0.8vw, 11px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: var(--bg-button);
    color: white;
    border-radius: clamp(6px, 0.6vw, 8px);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.emotion-grid button:hover {
    background: var(--bg-button-hover);
    border-color: rgba(var(--accent-rgb), 0.5);
}

.emotion-grid button.active {
    background: rgba(var(--accent-rgb), 0.3);
    border-color: rgba(var(--accent-rgb), 0.8);
}

@media (max-width: 1000px) {
    .emotion-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .emotion-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .emotion-grid button {
        padding: clamp(6px, 0.6vw, 10px);
        font-size: clamp(8px, 0.7vw, 10px);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   BLEND LAYERS - Mixing Console Aesthetic
   Inspired by audio mixing boards with vertical faders and minimal chrome
   ═══════════════════════════════════════════════════════════════════════════ */

/* Blend subsections - compact groupings within a single Blend section */
.blend-subsection {
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.blend-subsection:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.blend-subsection-header {
    font-size: clamp(10px, 0.9vw, 11px);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 6px;
}

.blend-subsection .add-layer-btn {
    margin-top: 6px;
    padding: 6px 12px;
    font-size: clamp(9px, 0.8vw, 10px);
}

/* Layer stack - horizontal scroll on mobile, vertical stack on desktop */
.layer-stack {
    display: flex;
    flex-direction: column;
    gap: 6px;
    pointer-events: auto;
}

/* Individual layer - card deck aesthetic with depth offset */
.layer-card {
    position: relative;
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.9) 0%, rgba(10, 10, 18, 0.95) 100%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    padding: 0;
    cursor: default;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: visible;
    touch-action: pan-y;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

/* Glow accent on left edge - category colored */
.layer-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--layer-accent, var(--accent));
    box-shadow: 0 0 12px var(--layer-accent, var(--accent));
    opacity: 0.8;
    transition: all 0.3s ease;
}

/* Blend mode category accent colors */
.layer-card[data-mode-category="darken"] { --layer-accent: #e85d5d; }
.layer-card[data-mode-category="lighten"] { --layer-accent: #f0c040; }
.layer-card[data-mode-category="contrast"] { --layer-accent: #6b8cff; }
.layer-card[data-mode-category="inversion"] { --layer-accent: #5cbd5c; }
.layer-card[data-mode-category="component"] { --layer-accent: #c774d4; }

/* Disabled state - desaturated, dimmed */
.layer-card.disabled {
    opacity: 0.4;
    filter: saturate(0.3);
}

.layer-card.disabled::before {
    opacity: 0.3;
    box-shadow: none;
}

/* Hover lift effect */
.layer-card:hover:not(.disabled) {
    transform: translateX(2px);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow:
        0 4px 16px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(var(--accent-rgb), 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.layer-card:hover:not(.disabled)::before {
    opacity: 1;
    width: 3px;
}

/* Drag states */
.layer-card.dragging {
    opacity: 0.6;
    transform: scale(0.97) rotate(-1deg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    z-index: 100;
}

.layer-card.drag-over {
    border-color: var(--layer-accent, var(--accent));
    background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.1) 0%, rgba(10, 10, 18, 0.95) 100%);
}

/* ─────────────────────────────────────────────────────────────────────────────
   LAYER HEADER - Compact strip with essential controls
   ───────────────────────────────────────────────────────────────────────────── */
.layer-header {
    display: flex;
    align-items: center;
    gap: 0;
    padding: 8px 10px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.layer-title {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
    cursor: pointer;
}

/* Drag handle - subtle dots */
.drag-handle {
    cursor: grab;
    font-size: 10px;
    letter-spacing: 1px;
    user-select: none;
    color: rgba(255, 255, 255, 0.2);
    transition: color 0.2s ease;
    padding: 2px;
}

.drag-handle:hover {
    color: rgba(255, 255, 255, 0.5);
}

.drag-handle:active {
    cursor: grabbing;
}

/* Layer name - blend mode indicator */
.layer-name {
    font-size: 11px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Mode icon prefix */
.layer-name::before {
    content: attr(data-mode-icon);
    margin-right: 4px;
    opacity: 0.6;
}

/* Header action buttons - minimal */
.layer-controls-header {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.layer-controls-header .toggle-btn,
.layer-controls-header .delete-btn {
    height: 22px;
    padding: 0 6px;
    font-size: 10px;
    font-weight: 600;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.layer-controls-header .toggle-btn {
    background: rgba(72, 187, 120, 0.15);
    border: 1px solid rgba(72, 187, 120, 0.3);
    color: #68d391;
    /* Reset the padding-left from generic toggle-btn (which makes room for checkmark) */
    padding-left: 6px;
}

/* Override the generic checkmark for layer card toggle buttons */
.layer-controls-header .toggle-btn::before {
    display: none;
}

.layer-controls-header .toggle-btn:hover {
    background: rgba(72, 187, 120, 0.25);
    border-color: rgba(72, 187, 120, 0.5);
}

.layer-controls-header .toggle-btn.disabled {
    background: rgba(100, 100, 100, 0.15);
    border-color: rgba(100, 100, 100, 0.3);
    color: rgba(255, 255, 255, 0.4);
}

.layer-controls-header .toggle-btn.disabled:hover {
    background: rgba(100, 100, 100, 0.25);
}

.layer-controls-header .delete-btn {
    background: transparent;
    border: 1px solid transparent;
    color: rgba(255, 255, 255, 0.25);
    font-size: 14px;
    min-width: 22px;
    padding: 0;
}

.delete-btn:hover {
    background: rgba(200, 60, 60, 0.2);
    border-color: rgba(200, 60, 60, 0.3);
    color: #e08080;
}

/* ─────────────────────────────────────────────────────────────────────────────
   LAYER CONTROLS - Collapsible body
   ───────────────────────────────────────────────────────────────────────────── */
.layer-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
    max-height: 180px;
    opacity: 1;
    transition: max-height 0.25s ease, opacity 0.2s ease, padding 0.25s ease;
    overflow: visible;
    position: relative;
}

.layer-card.collapsed .layer-controls {
    max-height: 0;
    opacity: 0;
    padding: 0 10px;
    overflow: hidden;
}

/* ─────────────────────────────────────────────────────────────────────────────
   BLEND MODE SELECTOR - Custom dropdown (no native select flash)
   ───────────────────────────────────────────────────────────────────────────── */
.custom-select {
    position: relative;
    width: 100%;
}

.custom-select-trigger {
    width: 100%;
    padding: 7px 28px 7px 10px;
    background-color: #0d0d14;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 11px;
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.custom-select-trigger::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid rgba(255, 255, 255, 0.4);
    transition: transform 0.2s ease;
}

.custom-select.open .custom-select-trigger::after {
    transform: rotate(180deg);
}

.custom-select-trigger:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.custom-select.open .custom-select-trigger {
    border-color: rgba(var(--accent-rgb), 0.4);
    box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.1);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.custom-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #0d0d14;
    border: 1px solid rgba(var(--accent-rgb), 0.4);
    border-top: none;
    border-radius: 0 0 4px 4px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.custom-select.open .custom-select-dropdown {
    display: block;
}

/* Raise layer card z-index when dropdown is open so it's above sibling cards */
.layer-card:has(.custom-select.open) {
    z-index: 100;
}

.custom-select-option {
    padding: 6px 10px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.75);
    cursor: pointer;
    transition: background-color 0.1s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.custom-select-option:hover,
.custom-select-option.focused {
    background-color: rgba(255, 255, 255, 0.08);
    color: white;
}

.custom-select-option.selected {
    background-color: rgba(var(--accent-rgb), 0.15);
    color: var(--accent);
}

.custom-select-option.selected.focused {
    background-color: rgba(var(--accent-rgb), 0.25);
}

.custom-select-option .mode-icon {
    opacity: 0.5;
    font-size: 10px;
}

/* Scrollbar for dropdown */
.custom-select-dropdown::-webkit-scrollbar {
    width: 4px;
}

.custom-select-dropdown::-webkit-scrollbar-track {
    background: transparent;
}

.custom-select-dropdown::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

/* Legacy select fallback (hidden but functional for form submission) */
.layer-select {
    display: none;
}

/* ─────────────────────────────────────────────────────────────────────────────
   NATIVE SELECT - Keyboard-navigable blend mode selector
   Supports arrow key navigation without opening dropdown
   ───────────────────────────────────────────────────────────────────────────── */
.blend-mode-select {
    flex: 1;
    max-width: 140px;
    padding: 7px 28px 7px 10px;
    background-color: #0d0d14;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 11px;
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5' viewBox='0 0 8 5'%3E%3Cpath fill='%23666' d='M0 0l4 5 4-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

.blend-mode-select:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.blend-mode-select:focus {
    outline: none;
    border-color: rgba(var(--accent-rgb), 0.4);
    box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.1);
}

.blend-mode-select option {
    background-color: #0d0d14;
    color: rgba(255, 255, 255, 0.85);
    padding: 8px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   LAYER SETTINGS ROW - Dropdown + Value on same line
   ───────────────────────────────────────────────────────────────────────────── */

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

.layer-settings-row .custom-select {
    flex: 1;
    max-width: 140px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   FADER CONTROL - Audio mixer style with step buttons
   Layout: [−] [════════════slider════════════] [+]
   ───────────────────────────────────────────────────────────────────────────── */

.fader-control {
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none; /* Prevent iOS callout menu */
    touch-action: none; /* Disable browser touch handling - let slider work directly */
}

.fader-value {
    font-size: 11px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--layer-accent, var(--accent));
    min-width: 48px;
    text-align: right;
    flex-shrink: 0;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 4px;
    transition: background 0.15s ease;
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 2px;
}

.fader-value:hover {
    background: rgba(var(--accent-rgb), 0.15);
    text-decoration-style: solid;
}

/* Step buttons - compact touch-friendly */
.fader-step {
    width: 24px;
    height: 24px;
    padding: 0;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.15s ease;
    user-select: none;
    -webkit-user-select: none;
}

.fader-step:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.fader-step:active {
    background: rgba(var(--accent-rgb), 0.2);
    border-color: rgba(var(--accent-rgb), 0.4);
    color: var(--accent);
    transform: scale(0.95);
}

/* Fader slider - takes remaining space */
.fader-slider {
    flex: 1;
    min-width: 0;
    margin: 0;
    touch-action: pan-x; /* Allow horizontal slider dragging */
}

/* Legacy .slider-control support (for non-layer-card sliders) */
.layer-card .slider-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 0;
    position: relative;
}

.layer-card .slider-label {
    display: contents;
}

.layer-card .slider-label > span:first-child {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
    flex-shrink: 0;
    min-width: 52px;
}

.layer-card .slider-label > .slider-value {
    order: 3;
    font-size: 11px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--layer-accent, var(--accent));
    min-width: 32px;
    text-align: right;
    flex-shrink: 0;
}

.layer-card .slider-control input[type="range"] {
    flex: 1;
    order: 2;
}

/* Legacy strength-control class (for backwards compat) */
.strength-control {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.strength-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Precision toggle - integrated into header */
.precision-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.precision-label {
    display: none; /* Hidden - buttons are self-explanatory */
}

.precision-toggle {
    display: flex;
    gap: 1px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 3px;
    padding: 1px;
}

.precision-btn {
    padding: 3px 6px;
    background: transparent;
    border: none;
    border-radius: 2px;
    color: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    font-size: 8px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    transition: all 0.15s ease;
}

.precision-btn:hover {
    color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.05);
}

.precision-btn.active {
    background: rgba(var(--accent-rgb), 0.25);
    color: var(--accent);
}

/* Strength value - positioned at golden ratio point */
.strength-value {
    font-size: 11px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--layer-accent, var(--accent));
    min-width: 40px;
    text-align: right;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 2px;
    transition: all 0.15s ease;
}

.strength-value:hover {
    background: rgba(var(--accent-rgb), 0.1);
}

/* Editable value input */
.strength-value-input {
    width: 48px;
    font-size: 11px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--accent);
    text-align: right;
    padding: 2px 4px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--accent);
    border-radius: 2px;
    outline: none;
}

/* Strength slider - fat-finger friendly fader */
.layer-strength-slider,
.layer-card input[type="range"] {
    width: 100%;
    height: 8px;
    background: linear-gradient(90deg,
        rgba(0, 0, 0, 0.6) 0%,
        rgba(30, 30, 40, 0.8) 100%);
    border-radius: 4px;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5);
    /* Expand touch target without changing visual size */
    padding: 8px 0;
    margin: -8px 0;
    background-clip: content-box;
}

.layer-strength-slider::-webkit-slider-thumb,
.layer-card input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    background: linear-gradient(145deg,
        rgba(255, 255, 255, 0.95) 0%,
        rgba(180, 180, 190, 0.9) 100%);
    border-radius: 50%;
    cursor: pointer;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.4),
        0 0 0 2px rgba(var(--accent-rgb), 0.3),
        inset 0 1px 2px rgba(255, 255, 255, 0.8);
    transition: all 0.15s ease;
}

.layer-strength-slider::-webkit-slider-thumb:hover,
.layer-card input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.5),
        0 0 0 3px rgba(var(--accent-rgb), 0.5),
        0 0 20px rgba(var(--accent-rgb), 0.3),
        inset 0 1px 2px rgba(255, 255, 255, 0.8);
}

.layer-strength-slider::-webkit-slider-thumb:active,
.layer-card input[type="range"]::-webkit-slider-thumb:active {
    transform: scale(1.05);
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.5),
        0 0 0 4px rgba(var(--accent-rgb), 0.6),
        0 0 25px rgba(var(--accent-rgb), 0.4),
        inset 0 1px 2px rgba(255, 255, 255, 0.8);
}

.layer-strength-slider::-moz-range-thumb,
.layer-card input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    background: linear-gradient(145deg,
        rgba(255, 255, 255, 0.95) 0%,
        rgba(180, 180, 190, 0.9) 100%);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.4),
        0 0 0 2px rgba(var(--accent-rgb), 0.3),
        inset 0 1px 2px rgba(255, 255, 255, 0.8);
}

/* ─────────────────────────────────────────────────────────────────────────────
   SWIPE INDICATORS (Mobile)
   ───────────────────────────────────────────────────────────────────────────── */
.layer-card .swipe-indicator {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.layer-card .swipe-indicator.left {
    left: 0;
    background: linear-gradient(90deg, rgba(200, 60, 60, 0.8) 0%, transparent 100%);
}

.layer-card .swipe-indicator.right {
    right: 0;
    background: linear-gradient(-90deg, rgba(60, 160, 90, 0.8) 0%, transparent 100%);
}

.layer-card.swiping-left .swipe-indicator.left,
.layer-card.swiping-right .swipe-indicator.right {
    opacity: 1;
}

/* ─────────────────────────────────────────────────────────────────────────────
   ADD LAYER BUTTON
   ───────────────────────────────────────────────────────────────────────────── */
.add-layer-btn {
    width: 100%;
    padding: 8px 12px;
    font-size: 11px;
    background: transparent;
    border: 1px dashed rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.4);
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.add-layer-btn:hover {
    background: rgba(72, 187, 120, 0.1);
    border-color: rgba(72, 187, 120, 0.3);
    color: #68d391;
}

/* ─────────────────────────────────────────────────────────────────────────────
   PRECISION MODE - Inline fine-tuning
   Click on value to open precision controls
   ───────────────────────────────────────────────────────────────────────────── */

/* Precision mode replaces layer-controls content */
.layer-card.precision-mode .layer-controls {
    display: none;
}

/* Card glow when in precision mode */
.layer-card.precision-mode {
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.3),
        0 0 0 2px rgba(var(--accent-rgb), 0.4),
        0 0 20px rgba(var(--accent-rgb), 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.layer-card.precision-mode::before {
    opacity: 1;
    width: 3px;
    box-shadow: 0 0 15px var(--accent);
}

.precision-inline {
    padding: 10px;
    user-select: none; /* Prevent text selection from long-press */
    -webkit-user-select: none;
}

.precision-inline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.precision-inline-title {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Done button - prominent accent colored */
.precision-inline-close {
    padding: 4px 10px;
    background: rgba(var(--accent-rgb), 0.2);
    border: 1px solid rgba(var(--accent-rgb), 0.5);
    border-radius: 4px;
    color: var(--accent);
    cursor: pointer;
    font-size: 10px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.precision-inline-close:hover {
    background: rgba(var(--accent-rgb), 0.3);
    border-color: var(--accent);
}

/* Large value display */
.precision-inline-value {
    font-size: 24px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-weight: 600;
    color: var(--accent);
    text-align: center;
    padding: 6px;
    margin-bottom: 10px;
    cursor: text;
    border-radius: 4px;
    transition: background 0.15s ease;
}

.precision-inline-value:hover {
    background: rgba(var(--accent-rgb), 0.1);
}

/* Editable input */
.precision-inline-input {
    width: 100%;
    font-size: 24px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    font-weight: 600;
    color: var(--accent);
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid var(--accent);
    border-radius: 4px;
    padding: 6px;
    text-align: center;
    outline: none;
    margin-bottom: 10px;
}

/* Precision fader row with step buttons */
.precision-inline-fader {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    touch-action: none; /* Container blocks touch, slider overrides */
}

.precision-inline-fader .fader-step {
    width: 32px;
    height: 32px;
    font-size: 18px;
    flex-shrink: 0;
}

/* Precision slider */
.precision-inline-slider {
    flex: 1;
    height: 28px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 14px;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    touch-action: pan-x; /* Allow horizontal slider dragging */
}

.precision-inline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(145deg, #fff 0%, #ddd 100%);
    border-radius: 50%;
    cursor: grab;
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.3),
        0 0 0 2px rgba(var(--accent-rgb), 0.4);
}

.precision-inline-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
}

.precision-inline-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(145deg, #fff 0%, #ddd 100%);
    border-radius: 50%;
    cursor: grab;
    border: none;
    box-shadow:
        0 2px 6px rgba(0, 0, 0, 0.3),
        0 0 0 2px rgba(var(--accent-rgb), 0.4);
}

/* Range labels */
.precision-inline-range {
    display: flex;
    justify-content: space-between;
    font-size: 9px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: rgba(255, 255, 255, 0.35);
}

/* ─────────────────────────────────────────────────────────────────────────────
   MOBILE RESPONSIVE
   ───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 1000px) {
    .layer-card {
        padding: 0;
    }

    .layer-header {
        padding: 10px 12px;
    }

    .layer-controls {
        padding: 12px;
        gap: 10px;
    }

    .toggle-btn,
    .delete-btn {
        width: 32px;
        height: 28px;
        font-size: 11px;
    }

    .custom-select-trigger {
        padding: 10px 30px 10px 12px;
        font-size: 13px;
    }

    .custom-select-option {
        padding: 10px 12px;
        font-size: 13px;
    }

    .blend-mode-select {
        padding: 10px 30px 10px 12px;
        font-size: 13px;
    }

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

    .layer-strength-slider,
    .layer-card input[type="range"] {
        height: 10px;
        padding: 10px 0;
        margin: -10px 0;
    }

    .layer-strength-slider::-webkit-slider-thumb,
    .layer-card input[type="range"]::-webkit-slider-thumb {
        width: 28px;
        height: 28px;
    }

    .layer-strength-slider::-moz-range-thumb,
    .layer-card input[type="range"]::-moz-range-thumb {
        width: 28px;
        height: 28px;
    }

    /* Precision inline mobile - larger touch targets */
    .precision-inline-slider {
        height: 36px;
    }

    .precision-inline-slider::-webkit-slider-thumb {
        width: 32px;
        height: 32px;
    }

    .precision-inline-slider::-moz-range-thumb {
        width: 32px;
        height: 32px;
    }

    .precision-inline-value {
        font-size: 28px;
    }
}