body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
    color: #333;
}
.container {
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
h1 {
    text-align: center;
    color: #2c3e50;
}
.controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}
.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
label {
    font-weight: bold;
}
.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
}
input[type="range"] {
    flex-grow: 1;
}
.value-display {
    min-width: 60px;
    text-align: right;
}
button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}
button:hover {
    background-color: #2980b9;
}
button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}
.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}
.preset-button {
    flex: 1 1 calc(33% - 10px);
    min-width: 120px;
    background-color: #2ecc71;
}
.preset-button:hover {
    background-color: #27ae60;
}
.info {
    margin-top: 30px;
    padding: 15px;
    background-color: #ecf0f1;
    border-radius: 5px;
}
.frequency-info {
    margin-top: 10px;
}
.waveform-container {
    position: relative;
    height: 100px;
    background-color: #ecf0f1;
    border-radius: 5px;
    overflow: hidden;
    margin: 20px 0;
}
.waveform {
    position: absolute;
    width: 100%;
    height: 100%;
}
#volume-slider {
    margin-top: 15px;
}