:root {
    --bg: #121212;
    --box-bg: #1e1e1e;
    --text: #e0e0e0;
    --primary: #00ffcc;
    --primary-dim: #004d40;
    --active: #ff0055;
    --step-bg: #2a2a2a;
    --step-border: #333;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.groovebox {
    background-color: var(--box-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.8);
    border: 1px solid #333;
    width: 90%;
    max-width: 800px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 1rem;
    flex-wrap: wrap;
    gap: 15px;
}

h1 {
    margin: 0;
    color: var(--primary);
    text-shadow: 0 0 10px rgba(0,255,204,0.3);
}

.controls {
    display: flex;
    gap: 20px;
    align-items: center;
}

button {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 10px 20px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.2s;
}

button:hover {
    background-color: var(--primary);
    color: var(--bg);
    box-shadow: 0 0 15px var(--primary);
}

button.playing {
    background-color: var(--active);
    border-color: var(--active);
    color: white;
    box-shadow: 0 0 15px var(--active);
}

.tempo-control {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.track {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.track-label {
    width: 100px;
    font-weight: bold;
    color: #888;
}

.steps {
    display: flex;
    gap: 5px;
    flex: 1;
}

.step {
    flex: 1;
    height: 40px;
    background-color: var(--step-bg);
    border: 1px solid var(--step-border);
    border-radius: 3px;
    cursor: pointer;
    transition: background-color 0.1s;
}

/* Highlight every 4th step for timing */
.step:nth-child(4n+1) {
    background-color: #333;
}

.step.active {
    background-color: var(--primary-dim);
    border-color: var(--primary);
}

.step.current {
    box-shadow: 0 0 10px white inset;
    border-color: white;
}

.synth-pad {
    margin-top: 30px;
    border-top: 1px solid #333;
    padding-top: 20px;
}

.synth-pad h2 {
    font-size: 1rem;
    color: #888;
    margin-bottom: 10px;
}

.pads {
    display: flex;
    gap: 10px;
}

.pad {
    flex: 1;
    height: 80px;
    background-color: #222;
    border: 1px solid #444;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    font-weight: bold;
    color: #666;
    transition: all 0.1s;
}

.pad:active {
    background-color: var(--primary);
    color: var(--bg);
    box-shadow: 0 0 20px var(--primary);
}

footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px dashed #333;
    text-align: center;
    font-size: 0.85rem;
    color: #888;
}

footer p {
    margin: 0 0 10px 0;
}

footer strong {
    color: var(--primary);
}

.legal-links a {
    color: #666;
    text-decoration: none;
    transition: color 0.2s;
}

.legal-links a:hover {
    color: var(--primary);
}

.sequencer {
    overflow-x: auto;
    padding-bottom: 10px;
}

@media (max-width: 600px) {
    .groovebox {
        padding: 1rem;
        width: 95%;
    }
    .controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    .track {
        min-width: 500px;
    }
    .pads {
        flex-wrap: wrap;
    }
    .pad {
        min-width: 30%;
    }
}