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

:root {
    --bg-deep: #0a0a1a;
    --bg-main: #0f0f23;
    --bg-card: #1a1a2e;
    --bg-surface: #16213e;
    --neon-green: #00ff41;
    --electric-blue: #00d4ff;
    --hot-pink: #ff0066;
    --amber: #ffb000;
    --text-primary: #e0e0e0;
    --text-secondary: #8888aa;
    --text-dim: #555577;
    --border-color: #2a2a4a;
    --glow-green: 0 0 12px rgba(0, 255, 65, 0.3);
    --glow-blue: 0 0 12px rgba(0, 212, 255, 0.3);
    --glow-pink: 0 0 12px rgba(255, 0, 102, 0.3);
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

#scanline-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.03) 2px,
        rgba(0, 0, 0, 0.03) 4px
    );
    pointer-events: none;
    z-index: 9999;
}

/* HEADER */
header {
    background: var(--bg-card);
    border-bottom: 2px solid var(--border-color);
    padding: 1.5rem 1rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--hot-pink), var(--electric-blue), var(--neon-green), var(--amber));
}

.title {
    font-family: 'Silkscreen', cursive;
    font-size: clamp(1.5rem, 5vw, 2.8rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--neon-green), var(--electric-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
    text-shadow: none;
}

.subtitle {
    font-size: clamp(0.7rem, 2vw, 0.9rem);
    color: var(--text-secondary);
    margin-top: 0.3rem;
    font-weight: 300;
}

/* MAIN */
main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

/* UPLOAD ZONE */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(26, 26, 46, 0.5);
    position: relative;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--electric-blue);
    background: rgba(0, 212, 255, 0.05);
    box-shadow: var(--glow-blue), inset 0 0 30px rgba(0, 212, 255, 0.03);
}

.upload-zone.dragover {
    transform: scale(1.01);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 0.8rem;
    filter: grayscale(0.3);
    transition: filter 0.3s;
}

.upload-zone:hover .upload-icon {
    filter: grayscale(0);
}

.upload-text {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 400;
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.4rem;
}

/* CANVAS AREA */
.canvas-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

@media (max-width: 700px) {
    .canvas-area {
        grid-template-columns: 1fr;
    }
}

.canvas-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.canvas-label {
    font-family: 'Silkscreen', cursive;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.canvas-bezel {
    background: #000;
    border: 3px solid #2a2a3a;
    border-radius: 6px;
    padding: 6px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.8), 0 4px 20px rgba(0,0,0,0.5);
    width: 100%;
    position: relative;
    overflow: hidden;
}

.canvas-bezel canvas {
    display: block;
    width: 100%;
    height: auto;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

.scanline-canvas-overlay {
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 1px,
        rgba(0, 0, 0, 0.15) 1px,
        rgba(0, 0, 0, 0.15) 2px
    );
    pointer-events: none;
    z-index: 2;
    transition: opacity 0.3s;
}

.scanline-canvas-overlay.off {
    opacity: 0;
}

/* STATS BAR */
.stats-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.stats-bar .stat-swatches {
    display: inline-flex;
    gap: 3px;
    vertical-align: middle;
}

.stats-bar .swatch {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 2px;
    border: 1px solid rgba(255,255,255,0.15);
}

.stat-highlight {
    color: var(--neon-green);
    font-weight: 700;
}

/* CONTROLS */
.controls {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.control-group {
    margin-bottom: 1.2rem;
}

.control-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* TOGGLE BUTTONS */
.toggle-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.toggle-btn {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    padding: 0.45rem 0.8rem;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.toggle-btn:hover {
    border-color: var(--electric-blue);
    color: var(--text-primary);
}

.toggle-btn.active {
    background: rgba(0, 212, 255, 0.15);
    border-color: var(--electric-blue);
    color: var(--electric-blue);
    box-shadow: var(--glow-blue);
}

/* CUSTOM PALETTE */
.custom-palette-area {
    margin-top: 0.6rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.8rem;
    background: var(--bg-surface);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.custom-palette-area .color-picker-wrap {
    position: relative;
    width: 36px;
    height: 36px;
    border-radius: 4px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    cursor: pointer;
}

.custom-palette-area .color-picker-wrap input[type="color"] {
    position: absolute;
    top: -4px;
    left: -4px;
    width: 44px;
    height: 44px;
    border: none;
    cursor: pointer;
    padding: 0;
}

/* SLIDERS */
.sliders-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 600px) {
    .sliders-row {
        grid-template-columns: 1fr;
    }
}

.slider-val {
    color: var(--neon-green);
    font-weight: 700;
    float: right;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-surface);
    outline: none;
    transition: background 0.2s;
    border: 1px solid var(--border-color);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--electric-blue);
    cursor: pointer;
    box-shadow: var(--glow-blue);
    border: 2px solid var(--bg-deep);
    transition: transform 0.15s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--electric-blue);
    cursor: pointer;
    box-shadow: var(--glow-blue);
    border: 2px solid var(--bg-deep);
}

/* CHECKBOX */
.toggle-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
    text-transform: none;
    font-weight: 400;
    font-size: 0.8rem;
    color: var(--text-primary);
}

.toggle-inline input[type="checkbox"] {
    display: none;
}

.checkmark {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-surface);
    position: relative;
    transition: all 0.2s;
    flex-shrink: 0;
}

.toggle-inline input[type="checkbox"]:checked + .checkmark {
    background: var(--electric-blue);
    border-color: var(--electric-blue);
    box-shadow: var(--glow-blue);
}

.toggle-inline input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: -1px;
    left: 2px;
    font-size: 12px;
    color: var(--bg-deep);
    font-weight: 800;
}

/* ACTION BUTTONS */
.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 0.5rem;
}

.btn {
    font-family: 'Silkscreen', cursive;
    font-size: 0.85rem;
    padding: 0.7rem 1.5rem;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s;
    letter-spacing: 0.03em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-green), #00cc33);
    color: var(--bg-deep);
    border-color: var(--neon-green);
    font-weight: 700;
}

.btn-primary:hover {
    box-shadow: var(--glow-green), 0 0 30px rgba(0, 255, 65, 0.2);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--electric-blue);
    border-color: var(--electric-blue);
}

.btn-secondary:hover {
    box-shadow: var(--glow-blue);
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--bg-surface);
    color: var(--hot-pink);
    border-color: var(--hot-pink);
}

.btn-danger:hover {
    box-shadow: var(--glow-pink);
    background: rgba(255, 0, 102, 0.1);
    transform: translateY(-1px);
}

/* FOOTER */
footer {
    text-align: center;
    padding: 2rem 1rem;
    font-size: 0.75rem;
    color: var(--text-dim);
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

footer a {
    color: var(--electric-blue);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--neon-green);
    text-decoration: underline;
}

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

/* Processing indicator */
.processing-indicator {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(10, 10, 26, 0.95);
    border: 2px solid var(--electric-blue);
    border-radius: 12px;
    padding: 2rem 3rem;
    z-index: 1000;
    font-family: 'Silkscreen', cursive;
    color: var(--electric-blue);
    box-shadow: var(--glow-blue);
    animation: pulse-glow 1s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    from { box-shadow: 0 0 12px rgba(0, 212, 255, 0.3); }
    to { box-shadow: 0 0 30px rgba(0, 212, 255, 0.6); }
}

/* Fade in animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.4s ease-out;
}