body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #111827; /* bg-gray-900 */
    color: #f3f4f6; /* text-gray-100 */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

#canvas-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    max-width: 95vw;
    max-height: 95vh;
}

canvas {
    background-color: #000;
    border-radius: 0.5rem;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5); /* shadow-violet-500/50 */
}

.upload-wrapper {
    margin-top: 1.5rem; /* mt-6 */
    text-align: center;
}

#audio-upload {
    display: none;
}

.upload-label {
    cursor: pointer;
    padding: 0.75rem 1.5rem; /* py-3 px-6 */
    background-color: #4f46e5; /* bg-indigo-600 */
    color: white;
    border-radius: 0.5rem; /* rounded-lg */
    transition: background-color 0.3s ease, transform 0.2s ease;
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

.upload-label:hover {
    background-color: #6366f1; /* hover:bg-indigo-500 */
    transform: translateY(-2px);
}

.upload-label:active {
    transform: translateY(0);
}

#info-text {
    margin-top: 0.5rem;
    font-size: 0.875rem; /* text-sm */
    color: #9ca3af; /* text-gray-400 */
}