/* ========================================
   MuzKeep - Music Catalog
   Clean, Professional CSS
   Inter Font, No Gradients
======================================== */

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --color-bg: #f8f9fa;
    --color-bg-alt: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #eff6ff;
    
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --transition: 0.2s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
    font-size: inherit;
}

/* Container */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   Header
======================================== */
.header {
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--color-text);
    background-color: var(--color-border-light);
}

.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.search-form {
    display: flex;
    align-items: center;
    flex: 1;
    max-width: 400px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-form:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-btn {
    padding: 10px 16px;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

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

.menu-toggle {
    display: none;
    padding: 8px;
    color: var(--color-text);
    font-size: 1.25rem;
}

/* ========================================
   Main Content
======================================== */
.main {
    flex: 1;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    position: relative;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.hero .btn-primary {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    border: none;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
    transition: all 0.3s ease;
}

.hero .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

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

.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-border-light);
    border-color: var(--color-text-muted);
}

/* Sections */
.section {
    padding: 60px 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

.section + .section-alt {
    margin-top: 40px;
}

/* About AI Music Section */
.about-ai-music {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-ai-music .section-title {
    margin-bottom: 24px;
}

.about-ai-music p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.about-ai-music p:last-child {
    margin-bottom: 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.section-title-related {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
    margin-bottom: 20px;
}

.section-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-primary);
}

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

/* Page Header */
.page-header {
    padding: 40px 0;
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.page-header-song {
    padding: 24px 0;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    margin-top: 16px;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-secondary);
}

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

.breadcrumb-sep {
    color: var(--color-border);
}

/* ========================================
   Songs Grid
======================================== */
.songs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 24px;
}

.songs-grid-wide {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.song-card {
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.song-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.song-card-link {
    display: block;
}

.song-card-cover {
    position: relative;
    aspect-ratio: 1;
    background-color: var(--color-bg);
    overflow: hidden;
}

.song-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.song-card:hover .song-card-cover img {
    transform: scale(1.05);
}

.song-card-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--color-text-muted);
}

.song-card-play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: opacity var(--transition);
}

.song-card:hover .song-card-play {
    opacity: 1;
}

.song-card-play i {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: #ffffff;
    font-size: 1.25rem;
    border-radius: 50%;
}

.song-card-info {
    padding: 16px;
}

.song-card-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-card-artist {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-card-views {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 8px;
}

/* ========================================
   Song Detail Page
======================================== */
.song-detail {
    padding: 40px 0;
}

.song-detail-grid {
    display: grid;
    gap: 40px;
}

.song-detail-main {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
    align-items: start;
}

.song-detail-cover {
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
}

.song-detail-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.song-detail-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--color-text-muted);
}

.song-detail-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.song-detail-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.song-detail-artist {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-top: -16px;
}

.song-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.meta-item i {
    color: var(--color-primary);
    font-size: 0.75rem;
}

.meta-item-ai {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    color: #ffffff;
    border-color: transparent;
}

.meta-item-ai i {
    color: #ffffff;
}

/* Audio Player */
.song-player {
    width: 100%;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-top: 24px;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.player-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition);
}

.player-play {
    background-color: var(--color-primary);
    color: #ffffff;
    font-size: 1rem;
}

.player-play:hover {
    background-color: var(--color-primary-hover);
}

.player-play.playing i::before {
    content: "\f04c";
}

.player-progress {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.player-progress-bar {
    height: 6px;
    background-color: var(--color-border);
    border-radius: 3px;
    cursor: pointer;
    overflow: hidden;
}

.player-progress-fill {
    height: 100%;
    width: 0%;
    background-color: var(--color-primary);
    border-radius: 3px;
    transition: width 0.1s linear;
}

.player-time {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.player-volume {
    display: flex;
    align-items: center;
    gap: 8px;
}

.player-volume-btn {
    width: 36px;
    height: 36px;
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.player-volume-btn:hover {
    color: var(--color-primary);
}

.player-volume-slider {
    width: 80px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background-color: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
}

.player-volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background-color: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
}

.song-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

/* Lyrics */
.song-lyrics {
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.song-lyrics-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 20px;
}

.song-lyrics-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.song-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.song-description h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

/* ========================================
   Pagination
======================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.pagination-link:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.pagination-numbers {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pagination-num {
    min-width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.pagination-num:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.pagination-num.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

.pagination-dots {
    padding: 0 8px;
    color: var(--color-text-muted);
}

/* ========================================
   Empty State
======================================== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
}

.empty-state i {
    font-size: 3rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.empty-state p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

/* ========================================
   Error Page
======================================== */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 200px);
    padding: 60px 0;
}

.error-content {
    text-align: center;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    letter-spacing: -0.04em;
}

.error-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 16px 0 8px;
}

.error-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

/* ========================================
   Footer
======================================== */
.footer {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 40px 0;
    margin-top: auto;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: center;
}

.footer-brand .logo-text {
    font-size: 1.25rem;
}

.footer-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 8px;
}

.footer-nav {
    display: flex;
    gap: 24px;
}

.footer-nav a {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.footer-nav a:hover {
    color: var(--color-primary);
}

.footer-copy {
    text-align: right;
}

.footer-copy p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 1024px) {
    .song-detail-main {
        grid-template-columns: 220px 1fr;
    }
}

@media (max-width: 768px) {
    .header-inner {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        height: auto;
        padding: 12px 0;
        align-items: center;
    }
    
    .logo {
        flex: 0 0 auto;
    }
    
    .search-form {
        order: 3;
        flex: 1 1 100%;
        max-width: none;
    }
    
    .menu-toggle {
        display: flex;
        margin-left: auto;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        font-size: 1.25rem;
        border-radius: var(--radius-md);
        background: var(--color-bg);
    }
    
    .nav {
        display: none;
        order: 4;
        flex: 1 1 100%;
        padding-top: 12px;
        border-top: 1px solid var(--color-border);
    }
    
    .nav.active {
        display: flex;
        flex-direction: column;
    }
    
    .nav-link {
        width: 100%;
        padding: 14px 16px;
        background-color: var(--color-bg);
        border-radius: var(--radius-md);
        margin-bottom: 8px;
        font-weight: 500;
        text-align: center;
        transition: all var(--transition);
    }
    
    .nav-link:hover {
        background-color: var(--color-primary-light);
        color: var(--color-primary);
    }
    
    .nav-link.active {
        background-color: var(--color-primary);
        color: #ffffff;
    }
    
    .nav-link:last-child {
        margin-bottom: 0;
    }
    
    .hero {
        padding: 48px 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
        color: #ffffff;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 24px;
        color: rgba(255, 255, 255, 0.8);
    }
    
    .section {
        padding: 32px 0;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 20px;
    }
    
    .section-title {
        font-size: 1.25rem;
    }

    .section-title-related {
        font-size: 1.25rem;
    }
    
    .songs-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 16px;
    }
    
    .songs-grid-wide {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    
    .song-detail {
        padding: 24px 0;
    }
    
    .song-detail-main {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 24px;
    }
    
    .song-detail-cover {
        max-width: 240px;
        margin: 0 auto;
    }
    
    .song-detail-info {
        align-items: center;
        gap: 16px;
    }
    
    .song-detail-title {
        font-size: 1.375rem;
    }
    
    .song-detail-artist {
        font-size: 1rem;
        margin-top: -8px;
    }
    
    .song-detail-meta {
        justify-content: flex-start;
        gap: 10px;
    }
    
    .meta-item {
        font-size: 0.8125rem;
    }
    
    .song-player {
        padding: 16px;
    }
    
    .player-controls {
        gap: 12px;
    }
    
    .player-btn {
        width: 40px;
        height: 40px;
    }
    
    .player-volume {
        display: none;
    }
    
    .song-actions {
        justify-content: center;
    }
    
    .song-actions .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .song-lyrics {
        padding: 20px;
        margin-top: 24px;
    }
    
    .song-lyrics-title {
        font-size: 1.125rem;
    }
    
    .page-header {
        padding: 24px 0;
    }
    
    .breadcrumb {
        font-size: 0.8125rem;
        flex-wrap: wrap;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 24px;
    }
    
    .footer-nav {
        justify-content: center;
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .footer-copy {
        text-align: center;
    }
    
    .pagination {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .pagination-link {
        padding: 8px 12px;
        font-size: 0.8125rem;
    }
    
    .empty-state {
        padding: 48px 16px;
    }
    
    .empty-state i {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .header-inner {
        gap: 8px;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .search-input {
        padding: 8px 12px 8px 36px;
        font-size: 0.875rem;
    }
    
    .search-btn {
        padding: 8px 12px;
    }
    
    .input-icon i {
        left: 10px;
    }
    
    .hero {
        padding: 32px 0;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 0.9375rem;
    }
    
    .btn {
        padding: 10px 18px;
        font-size: 0.875rem;
    }
    
    .songs-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .song-card {
        border-radius: var(--radius-md);
    }
    
    .song-card-info {
        padding: 10px;
    }
    
    .song-card-title {
        font-size: 0.8125rem;
    }
    
    .song-card-artist {
        font-size: 0.75rem;
    }
    
    .song-card-cover-placeholder {
        font-size: 2rem;
    }
    
    .song-card-play i {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .song-detail-cover {
        max-width: 200px;
    }
    
    .song-detail-title {
        font-size: 1.25rem;
    }
    
    .song-detail-meta {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .meta-item {
        padding: 10px 12px;
        font-size: 0.75rem;
        justify-content: center;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .page-subtitle {
        font-size: 0.875rem;
    }
    
    .section-title {
        font-size: 1.125rem;
    }

    .section-title-related {
        font-size: 1.125rem;
    }
    
    .song-lyrics {
        padding: 16px;
    }
    
    .song-lyrics-content {
        font-size: 0.9375rem;
        line-height: 1.7;
    }
    
    .player-progress-bar {
        height: 8px;
    }
    
    .error-code {
        font-size: 4rem;
    }
    
    .error-title {
        font-size: 1.25rem;
    }
    
    .error-actions {
        flex-direction: column;
        align-items: center;
    }
}