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

:root {
    --bg: #0e0e18;
    --surface: #1a1a2e;
    --border: #2a2a40;
    --text: #e0e0e8;
    --text-dim: #8888a0;
    --accent: #20d060;
    --accent-hover: #18b850;
    --btn-bg: #252540;
    --btn-hover: #303050;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 0.75rem 1rem;
}

.container {
    max-width: 600px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 0.75rem;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
}

header .subtitle {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 1rem;
}

button {
    background: var(--btn-bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.4rem 0.8rem;
    border-radius: 5px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

button:hover {
    background: var(--btn-hover);
    border-color: var(--accent);
}

button:active {
    transform: scale(0.97);
}

button.playing {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
    font-weight: 600;
}

button.playing:hover {
    background: var(--accent-hover);
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.speed-control input[type="range"] {
    width: 80px;
    accent-color: var(--accent);
}

.speed-control span {
    min-width: 1.5em;
    text-align: right;
}

.stats {
    display: flex;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-dim);
    font-variant-numeric: tabular-nums;
}

.canvas-wrapper {
    display: flex;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
}

canvas {
    display: block;
    width: 100%;
    max-width: 512px;
    aspect-ratio: 1;
    border-radius: 4px;
    cursor: crosshair;
    image-rendering: pixelated;
}

footer {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.75rem;
}

@media (max-width: 600px) {
    body {
        padding: 1rem 0.5rem;
    }

    .toolbar {
        gap: 0.4rem;
        padding: 0.5rem;
    }

    .speed-control {
        margin-left: 0;
        width: 100%;
    }

    .stats {
        width: 100%;
        justify-content: center;
    }
}