:root {
    --base-bg: #1e1e2e;          /* Dark background */
    --surface: #313244;          /* Card background */
    --overlay: #45475a;          /* Hover / dropdown */
    --text: #cdd6f4;             /* Main text */
    --subtext: #bac2de;          /* Secondary text */
    --accent: #a6e3a1;           /* Greenish accent */
    --accent-dark: #4caf50;      /* Hover accent */
    --shadow-light: rgba(0,0,0,0.3);
    --shadow-glow: rgba(166,227,161,0.4);
}

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

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--base-bg);
    color: var(--text);
    padding: 2rem;
    transition: background 0.3s ease, color 0.3s ease;
}

/* ===== Header ===== */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    color: var(--accent);
    text-shadow: 0 0 8px var(--shadow-glow), 0 0 16px rgba(166,227,161,0.2);
    animation: glow-pulse 3s infinite alternate;
}

/* ===== Links / Buttons ===== */
.links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.links .btn {
    background-color: var(--accent);
    color: var(--base-bg);
    padding: 0.5rem 1rem;
    border-radius: 10px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px var(--shadow-light);
}

.links .btn:hover {
    background-color: var(--accent-dark);
    box-shadow: 0 4px 14px var(--shadow-glow), 0 0 8px var(--shadow-glow);
    transform: translateY(-2px);
}

/* ===== Featured Tracks ===== */
.featured-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: space-between;
}

.featured-track {
    flex: 1 1 calc(33% - 1rem);
    background: var(--surface);
    border-radius: 16px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--shadow-light), 0 0 6px var(--shadow-glow);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

/* Animated edge glow for featured */
.featured-track::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(120deg, rgba(166,227,161,0.3), rgba(166,227,161,0.1), rgba(166,227,161,0.3));
    background-size: 400% 400%;
    filter: blur(6px);
    opacity: 0.4;
    z-index: 0;
    animation: glow-sweep 8s linear infinite;
}

.featured-track:hover::before {
    opacity: 1;
}

/* Keep content above pseudo-element */
.featured-track > * {
    position: relative;
    z-index: 1;
}

/* Hover effects for featured */
.featured-track:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 24px var(--shadow-light), 0 0 18px var(--shadow-glow);
}

.featured-track h3 {
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.featured-track p {
    font-size: 0.9rem;
    text-align: center;
    color: var(--subtext);
    margin-bottom: 0.5rem;
}

/* ===== Normal Tracks ===== */
.track {
    background: var(--surface);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 3px 10px var(--shadow-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.track:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--shadow-light), 0 0 8px var(--shadow-glow);
}

.track h3 {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 0.3rem;
}

.track p {
    font-size: 0.9rem;
    color: var(--subtext);
    margin-bottom: 0.3rem;
}

/* ===== Audio Player ===== */
audio {
    width: 100%;
    margin-top: 0.5rem;
    outline: none;
    border-radius: 6px;
}

/* ===== Sort Dropdown ===== */
#sort-select {
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    border: none;
    background: var(--overlay);
    color: var(--text);
    font-weight: bold;
    margin-left: 0.5rem;
    transition: all 0.3s ease;
}

#sort-select:hover {
    box-shadow: 0 4px 12px var(--shadow-glow);
}

/* ===== Animations ===== */
@keyframes glow-sweep {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes glow-pulse {
    0% { text-shadow: 0 0 8px var(--shadow-glow); }
    50% { text-shadow: 0 0 16px var(--shadow-glow); }
    100% { text-shadow: 0 0 8px var(--shadow-glow); }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .featured-track {
        flex: 1 1 calc(50% - 1rem);
    }
}

@media (max-width: 600px) {
    .featured-track {
        flex: 1 1 100%;
    }

    body {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.5rem;
    }
}