/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - Music Theme */
    --primary: #9333ea;
    --primary-dark: #7c3aed;
    --accent: #a855f7;
    --bg: #ffffff;
    --bg-secondary: #f9fafb;
    --text: #111827;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary: #a855f7;
    --primary-dark: #9333ea;
    --accent: #c084fc;
    --bg: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --text: #f9fafb;
    --text-secondary: #9ca3af;
    --border: #2d2d2d;
    --shadow: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.3s, color 0.3s;
}

/* ==================== SCROLL PROGRESS ==================== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(147, 51, 234, 0.1);
    z-index: 10000;
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.1s ease;
}

/* ==================== PARTICLES ==================== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.3;
}

/* ==================== HEADER ==================== */
.music-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all 0.3s;
}

[data-theme="dark"] .music-header {
    background: rgba(15, 15, 15, 0.8);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    transition: color 0.3s;
}

.logo:hover {
    color: var(--primary);
}

.music-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.lang-toggle {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-secondary);
    padding: 0.25rem;
    border-radius: 6px;
}

.lang-btn {
    padding: 0.35rem 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s;
}

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

.theme-toggle {
    background: var(--bg-secondary);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.theme-toggle:hover {
    background: var(--primary);
    color: white;
}

.theme-icon {
    font-size: 1rem;
    display: none;
}

[data-theme="light"] .theme-icon.moon {
    display: block;
}

[data-theme="dark"] .theme-icon.sun {
    display: block;
}

/* ==================== MAIN CONTENT ==================== */
.main-content {
    position: relative;
    z-index: 10;
    padding-top: 5rem;
}

/* ==================== HERO SECTION ==================== */
.hero-section {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
}

.hero-badge {
    display: inline-flex;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.category-filter {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 2rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-secondary);
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s;
}

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

/* ==================== SECTION ==================== */
.section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== TRACKS GRID ==================== */
.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.track-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.track-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
}

.track-cover {
    position: relative;
    width: 100%;
    padding-top: 100%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    overflow: hidden;
}

.track-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    opacity: 0;
    transition: opacity 0.3s;
}

.track-item:hover .track-play-btn {
    opacity: 1;
}

.track-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.3s;
}

.track-item:hover .track-overlay {
    opacity: 1;
}

.track-info {
    padding: 1.25rem;
}

.track-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.track-genre {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==================== SKILLS GRID ==================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.skill-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==================== ABOUT ==================== */
.about-content {
    max-width: 700px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .music-nav {
        display: none;
    }

    .header-container {
        padding: 0 1rem;
    }

    .section {
        padding: 3rem 1rem;
    }

    .tracks-grid {
        grid-template-columns: 1fr;
    }
}