:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --bg-dark: #0a0a0a;
}

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

body {
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

/* Glass Navigation */
.glass-nav {
    background: rgba(0, 0, 0, 0.3) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

/* Glass Card Effect */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* Hero Section with Glass */
.hero-glass {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

.floating-elements i {
    position: absolute;
    font-size: 60px;
    animation: float 6s ease-in-out infinite;
}

.floating-elements i:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.floating-elements i:nth-child(2) { top: 60%; left: 80%; animation-delay: 1s; }
.floating-elements i:nth-child(3) { top: 70%; left: 20%; animation-delay: 2s; }
.floating-elements i:nth-child(4) { top: 30%; left: 85%; animation-delay: 3s; }

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.text-glow {
    text-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.btn-glow {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50px;
    padding: 10px 25px;
    color: white;
    transition: all 0.3s;
}

.btn-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.6);
    color: white;
}

/* Glass Input */
.glass-input {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    color: white;
    border-radius: 10px;
}

.glass-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    color: white;
}

/* Sidebar */
.sidebar {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    min-height: 100vh;
    padding: 0;
    border-right: 1px solid var(--glass-border);
}

.list-group-item {
    background: transparent;
    border: none;
    color: white;
    transition: all 0.3s;
    margin: 5px 0;
}

.list-group-item:hover, .list-group-item.active {
    background: var(--primary-gradient);
    color: white;
    transform: translateX(5px);
}

/* Stat Cards */
.stat-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s;
    border: 1px solid var(--glass-border);
}

.stat-card:hover {
    transform: scale(1.05);
}

.stat-card i {
    font-size: 40px;
    margin-bottom: 10px;
}

.stat-card h3 {
    font-size: 32px;
    font-weight: bold;
    margin: 10px 0;
}

/* Music Cards */
.music-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s;
    border: 1px solid var(--glass-border);
}

.music-card:hover {
    transform: translateY(-5px);
}

.music-info {
    padding: 15px;
}

/* Buttons */
.btn-primary {
    background: var(--primary-gradient);
    border: none;
    padding: 10px 30px;
    border-radius: 50px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Progress Bar */
.progress {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    background: var(--primary-gradient);
}

/* Badges */
.badge {
    padding: 8px 15px;
    border-radius: 50px;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
        margin-bottom: 20px;
    }
    
    .stat-card h3 {
        font-size: 24px;
    }
}

/* Audio Player */
audio {
    border-radius: 50px;
    width: 100%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.glass-card, .music-card {
    animation: fadeIn 0.6s ease-out;
}