* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1a1a1a;
    background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url("audio_bg.jpg"); 
    background-size: cover;
    background-attachment: fixed;
    color: #f4f4f4;
    line-height: 1.6;
}

/* --- Header Navigation --- */
#header {
    background-color: rgba(20, 20, 20, 0.95);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    border-bottom: 2px solid #ff6666;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.button {
    padding: 20px 25px;
    text-decoration: none;
    color: #ccc;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.button:hover {
    color: #fff;
    background-color: rgba(255, 102, 102, 0.2);
}

.button.active {
    color: cyan;
    border-bottom: 3px solid cyan;
    background-color: rgba(0, 255, 255, 0.1);
}

/* --- Main Content --- */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background-color: rgba(0, 0, 0, 0.85); 
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border-radius: 12px;
    border: 1px solid #333;
}

h1 {
    color: cyan;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
    margin-bottom: 10px;
    text-align: center;
    font-size: 2.5rem;
}

.subtitle {
    text-align: center;
    margin-bottom: 30px;
    color: #bbb;
}

/* --- Audio Track Items --- */
.track-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    margin-bottom: 10px;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.05);
    transition: transform 0.2s ease;
}

.track-list-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.track-title {
    font-size: 1.1em;
    font-weight: bold;
    color: #fff;
}

audio {
    height: 35px;
    filter: invert(100%) hue-rotate(180deg) brightness(1.5); /* Modern silver look */
}

/* --- Responsive Design --- */
@media (max-width: 600px) {
    .track-list-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    .container {
        width: 95%;
        padding: 15px;
    }
    audio {
        width: 100%;
    }
    /* Animation for the active track */
.track-list-item {
    transition: all 0.4s ease;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
    background: rgba(255, 255, 255, 0.05);
}

.track-list-item.playing {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
    transform: scale(1.02);
    border-left: 5px solid cyan;
}

.track-title {
    display: block;
    font-weight: bold;
    margin-bottom: 8px;
    color: #fff;
}

}

/* Container for the falling notes */
#notes-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* Allows clicking through the notes */
    z-index: 9999;
    overflow: hidden;
}

/* The individual note style */
.note {
    position: absolute;
    top: -50px;
    color: #C0C0C0; /* Silver base */
    text-shadow: 1px 1px 2px rgba(255,255,255,0.8), 0 0 10px rgba(192,192,192,0.5);
    font-size: 2rem;
    user-select: none;
    animation: fall linear forwards;
}

/* Falling animation */
@keyframes fall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    80% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(110vh) rotate(360deg);
        opacity: 0;
    }
}