:root {
    --bg-color: #1e1e1e;
    --accent-color: #d4af37;
    --text-color: #ffffff;
    --font-family: 'Arial', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

header {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.main-content {
    max-width: 90%;
    width: 600px;
}

.controls-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

label {
    font-size: 1rem;
}

select, input[type="range"] {
    appearance: none;
    background-color: var(--accent-color);
    border: none;
    height: 10px;
    width: 200px;
    border-radius: 5px;
    transition: box-shadow 0.2s;
}

select:focus, input[type="range"]:focus {
    outline: none;
    box-shadow: 0 0 10px var(--accent-color);
}

select:hover, input[type="range"]:hover {
    cursor: pointer;
}

#waveform-display {
    width: 100%;
    height: 200px;
    background-color: #222;
    border: 2px solid var(--accent-color);
    border-radius: 10px;
}

button {
    background-color: var(--accent-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.2s;
    font-size: 1rem;
    cursor: pointer;
}

button:hover {
    background-color: darken(var(--accent-color), 10%);
}

button:focus {
    outline: none;
    box-shadow: 0 0 10px var(--accent-color);
}