:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f5f6fa;
    --text-color: #2c3e50;
    --border-radius: 8px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Header */
.header {
    background-color: var(--primary-color);
    padding: var(--spacing-md);
    color: white;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    color: white;
    text-decoration: none;
}

/* Album Grid */
.album-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.album-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.album-cover {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.album-info {
    padding: var(--spacing-sm);
}

.album-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.track-list {
    list-style: none;
}

.track-item {
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.track-item:hover {
    background-color: var(--background-color);
}

/* Player */
.player {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 300px;
    background: white;
    padding: var(--spacing-md);
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    z-index: 1000;
}

.player-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.player-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

/* Forms */
.form-container {
    max-width: 600px;
    margin: var(--spacing-lg) auto;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: bold;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
}

.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.2s ease;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn:hover {
    opacity: 0.9;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }