body {
    margin: 0;
    background-color: #1a1a1a;
    color: white;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: #2a2a2a;
    padding: 20px;
    border-radius: 15px;
    width: 95vw;
    max-width: 600px;
    text-align: center;
}

.control-panel {
    display: flex;
    justify-content: space-around;
    gap: 10px;
    margin-bottom: 20px;
}

.rod-ctrl {
    background: #333;
    padding: 10px;
    border-radius: 8px;
    flex: 1;
}

.label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #00d4ff;
}

.digital-input {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.digital-input input {
    width: 50px;
    background: #000;
    color: #0f0;
    border: 1px solid #444;
    padding: 5px;
    text-align: center;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
}

.digital-input button {
    width: 25px;
    height: 25px;
    padding: 0;
    line-height: 1;
}

.main-buttons {
    margin-bottom: 15px;
}

#startBtn { background: #27ae60; color: white; width: 200px; }
#startBtn.active { background: #e74c3c; }

canvas {
    background: #000;
    border-radius: 10px;
    width: 100%;
    height: 350px;
}