.audio-hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: 120px 20px 60px;
}

/* Animated Wave Background */
.wave-bg {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(86, 126, 187, 0.1), transparent);
    z-index: -1;
}

.canvas-container {
    width: 100%;
    height: 150px;
    margin-bottom: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.visualizer-line {
    width: 4px;
    height: 40px;
    background-color: var(--primary-color);
    display: inline-block;
    margin: 0 5px;
    border-radius: 4px;
    animation: wave-motion 1.5s infinite ease-in-out;
    transition: background-color 0.5s;
}

@keyframes wave-motion {
    0%, 100% { height: 20px; }
    50% { height: 80px; }
}

.audio-controls {
    display: flex;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.wave-btn {
    background: white;
    border: 1px solid #ddd;
    padding: 20px 40px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.wave-btn h4 { margin-top: 0; color: var(--primary-color); }
.wave-btn span { font-size: 0.8rem; color: #888; }

.wave-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.wave-btn.active {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

.wave-btn.active h4 { color: white; }
.wave-btn.active span { color: rgba(255,255,255,0.7); }

.playing-indicator {
    font-size: 0.9rem;
    color: #999;
    letter-spacing: 2px;
    margin-top: 20px;
    opacity: 0;
    transition: opacity 0.5s;
}

.playing-indicator.active { opacity: 1; }

/* Frequency Variations */
body.delta-mode { background-color: #05080a; color: #fff; }
body.delta-mode .visualizer-line { background-color: #567ebb; }
body.alpha-mode { background-color: #f8f9fa; }
body.gamma-mode { background-color: #fffaf0; }
body.gamma-mode .visualizer-line { background-color: var(--accent-color); }

@media (max-width: 768px) {
    .wave-btn { padding: 15px 25px; width: 140px; }
    .audio-hero h1 { font-size: 2rem; }
}