/*
 * mymusic.icu - Stylesheet
 * 
 * Design philosophy:
 * - Clean, modern aesthetic with music-themed accents
 * - Mobile-first responsive design
 * - CSS custom properties for easy theming
 * - No framework dependencies
 */

/* =============================================================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================================================= */

:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    --color-bg: #0f0f1a;
    --color-bg-card: #1a1a2e;
    --color-bg-input: #252540;
    
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-text-heading: #f8fafc;
    
    --color-border: #334155;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* =============================================================================
   RESET & BASE STYLES
   ============================================================================= */

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

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

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

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

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* =============================================================================
   LAYOUT
   ============================================================================= */

.main-content {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* =============================================================================
   HEADER & NAVIGATION
   ============================================================================= */

.site-header {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-heading);
}

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

/* Search form in nav */
.search-form {
    display: flex;
    gap: var(--spacing-xs);
    flex: 1;
    max-width: 300px;
}

.search-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-links a {
    color: var(--color-text);
    font-weight: 500;
}

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

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.username {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* =============================================================================
   BUTTONS
   ============================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

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

.btn-secondary:hover {
    background: var(--color-bg-input);
    color: var(--color-text);
}

.btn-danger {
    background: var(--color-error);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    color: white;
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* =============================================================================
   FORMS
   ============================================================================= */

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text-heading);
}

.form-group label small {
    font-weight: 400;
    color: var(--color-text-muted);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.file-input {
    padding: var(--spacing-md);
    background: var(--color-bg-input);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.file-input:hover {
    border-color: var(--color-primary);
}

.file-preview {
    margin-top: var(--spacing-sm);
}

.file-preview p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* =============================================================================
   FLASH MESSAGES
   ============================================================================= */

.flash-messages {
    margin-bottom: var(--spacing-lg);
}

.flash {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 500;
}

.flash-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.flash-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.flash-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.flash-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

.flash-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
}

.flash-close:hover {
    opacity: 1;
}

/* =============================================================================
   PAGE HEADER
   ============================================================================= */

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
    font-size: var(--font-size-3xl);
    color: var(--color-text-heading);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

/* =============================================================================
   AUTH PAGES (Login, Register, Upload)
   ============================================================================= */

.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: var(--spacing-lg);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.auth-card h1 {
    font-size: var(--font-size-2xl);
    color: var(--color-text-heading);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.auth-subtitle {
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--color-text-muted);
}

.upload-card {
    max-width: 560px;
}

/* =============================================================================
   SONG CARDS (Grid Layout)
   ============================================================================= */

.songs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.song-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.song-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

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

.cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

.song-info {
    padding: var(--spacing-lg);
}

.song-title {
    font-size: var(--font-size-lg);
    color: var(--color-text-heading);
    margin-bottom: var(--spacing-xs);
}

.song-artist {
    font-size: var(--font-size-sm);
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-sm);
}

.song-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.song-player {
    width: 100%;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    background: #3a3a5a;
    padding: 4px;
}

/* Custom audio player styling */
audio::-webkit-media-controls-panel {
    background: #3a3a5a;
}

audio::-webkit-media-controls-current-time-display,
audio::-webkit-media-controls-time-remaining-display {
    color: #ffffff;
}

/* Firefox audio styling */
audio {
    filter: invert(0.1) brightness(1.3);
}

.song-date {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.song-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.delete-form {
    display: inline;
}

/* =============================================================================
   EMPTY STATE
   ============================================================================= */

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

.empty-state h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-text-heading);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

/* =============================================================================
   ERROR PAGE
   ============================================================================= */

.error-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

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

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

.error-card h1 {
    font-size: var(--font-size-2xl);
    color: var(--color-text-heading);
    margin-bottom: var(--spacing-md);
}

.error-card p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

/* =============================================================================
   FOOTER
   ============================================================================= */

.site-footer {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

/* =============================================================================
   PAGINATION
   ============================================================================= */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg);
}

.pagination-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(.disabled) {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.pagination-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.results-count {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
}

/* =============================================================================
   SEARCH PAGE
   ============================================================================= */

.search-section {
    margin-bottom: var(--spacing-2xl);
}

.search-form-large {
    display: flex;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.search-input-large {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
    color: var(--color-text);
    background: var(--color-bg-input);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast);
}

.search-input-large:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* =============================================================================
   PLAYLIST DROPDOWN (Add to playlist)
   ============================================================================= */

.playlist-dropdown {
    position: relative;
    display: inline-block;
}

.playlist-dropdown-btn {
    cursor: pointer;
}

.playlist-dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    bottom: 100%;
    min-width: 180px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 50;
    margin-bottom: var(--spacing-xs);
    max-height: 200px;
    overflow-y: auto;
}

.playlist-dropdown:hover .playlist-dropdown-content,
.playlist-dropdown:focus-within .playlist-dropdown-content {
    display: block;
}

.playlist-dropdown-content form {
    display: block;
}

.playlist-option {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: var(--font-size-sm);
}

.playlist-option:hover {
    background: var(--color-bg-input);
    color: var(--color-primary-light);
}

/* =============================================================================
   PLAYLISTS GRID
   ============================================================================= */

.playlists-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.playlist-card {
    display: flex;
    gap: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.playlist-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.playlist-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.playlist-info {
    flex: 1;
    min-width: 0;
}

.playlist-name {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.playlist-name a {
    color: var(--color-text-heading);
}

.playlist-name a:hover {
    color: var(--color-primary-light);
}

.playlist-creator {
    font-size: var(--font-size-sm);
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-sm);
}

.playlist-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.playlist-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.private-badge {
    color: var(--color-warning);
}

.public-badge {
    color: var(--color-success);
}

.playlist-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* =============================================================================
   PLAYLIST VIEW PAGE
   ============================================================================= */

.playlist-header {
    text-align: left;
}

.playlist-header-content {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
}

.playlist-icon-large {
    font-size: 6rem;
    flex-shrink: 0;
}

.playlist-header-info h1 {
    text-align: left;
    margin-bottom: var(--spacing-sm);
}

.playlist-stats {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

.playlist-actions-header {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* Playlist songs list */
.playlist-songs {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.song-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast);
}

.song-row:last-child {
    border-bottom: none;
}

.song-row:hover {
    background: var(--color-bg-input);
}

.song-row-number {
    width: 30px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.song-row-cover {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
}

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

.cover-placeholder-small {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    font-size: 1.5rem;
}

.song-row-info {
    flex: 1;
    min-width: 0;
}

.song-row-info .song-title {
    font-size: var(--font-size-base);
    margin-bottom: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-row-info .song-artist {
    font-size: var(--font-size-sm);
    margin: 0;
}

.song-row-player {
    flex-shrink: 0;
}

.song-player-small {
    width: 250px;
    height: 32px;
}

.song-row-actions {
    flex-shrink: 0;
}

.playlist-footer {
    margin-top: var(--spacing-xl);
    text-align: center;
}

/* =============================================================================
   CHECKBOX STYLING
   ============================================================================= */

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--color-primary);
}

/* =============================================================================
   LIKES, COMMENTS, AND PROFILES
   ============================================================================= */

/* Song stats display */
.song-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.like-count {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Song title links */
.song-title a {
    color: var(--color-text-heading);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.song-title a:hover {
    color: var(--color-primary-light);
}

/* Artist links */
.song-artist a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.song-artist a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Song cover link */
.song-cover-link {
    display: block;
    position: relative;
    overflow: hidden;
}

.song-cover-link::after {
    content: '▶';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.song-cover-link:hover::after {
    opacity: 1;
}

/* =============================================================================
   SONG DETAIL PAGE
   ============================================================================= */

.song-detail-container {
    max-width: 900px;
    margin: 0 auto;
}

.song-detail-header {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

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

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

.song-detail-cover .cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.song-detail-info h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.song-detail-artist {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.song-detail-artist a {
    color: var(--color-primary-light);
    text-decoration: none;
}

.song-detail-artist a:hover {
    text-decoration: underline;
}

.song-detail-description {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.song-detail-player {
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

.song-detail-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

.song-detail-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-heading);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Like button */
.like-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid var(--color-border);
    background: transparent;
    color: var(--color-text);
}

.like-btn:hover {
    border-color: #ef4444;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.like-btn.liked {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.like-btn .heart {
    font-size: 1.2em;
}

/* Small like button for song cards */
.like-form {
    display: inline;
}

.like-btn-small {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-muted);
}

.like-btn-small:hover {
    border-color: #ef4444;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.like-btn-small.liked {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

/* =============================================================================
   COMMENTS SECTION
   ============================================================================= */

.comments-section {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.comments-section h2 {
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.comment-form {
    margin-bottom: var(--spacing-xl);
}

.comment-input-wrapper {
    display: flex;
    gap: var(--spacing-md);
}

.comment-input-wrapper textarea {
    flex: 1;
    min-height: 80px;
    resize: vertical;
}

.comment-input-wrapper .btn {
    align-self: flex-end;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.comment-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-input);
    border-radius: var(--radius-md);
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.comment-content {
    flex: 1;
    min-width: 0;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    gap: var(--spacing-sm);
}

.comment-author {
    font-weight: 600;
    color: var(--color-text-heading);
}

.comment-author a {
    color: inherit;
    text-decoration: none;
}

.comment-author a:hover {
    color: var(--color-primary-light);
}

.comment-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.comment-text {
    color: var(--color-text);
    line-height: 1.6;
    word-wrap: break-word;
}

.comment-actions {
    margin-top: var(--spacing-sm);
}

.delete-comment-btn {
    font-size: var(--font-size-sm);
    color: var(--color-error);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.delete-comment-btn:hover {
    text-decoration: underline;
}

.no-comments {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

/* =============================================================================
   USER PROFILE PAGE
   ============================================================================= */

.profile-header {
    display: flex;
    gap: var(--spacing-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.profile-avatar {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    flex-shrink: 0;
}

.profile-info {
    flex: 1;
}

.profile-info h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.profile-joined {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.profile-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.profile-stat {
    text-align: center;
}

.profile-stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-heading);
}

.profile-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.profile-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Profile sections */
.profile-section {
    margin-bottom: var(--spacing-2xl);
}

.profile-section h2 {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.profile-playlists-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

/* Liked songs page */
.liked-songs-header {
    margin-bottom: var(--spacing-xl);
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        text-align: center;
    }
    
    .search-form {
        max-width: 100%;
        order: 3;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .songs-grid {
        grid-template-columns: 1fr;
    }
    
    .playlists-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .auth-card {
        padding: var(--spacing-lg);
    }
    
    .playlist-header-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .playlist-header-info h1 {
        text-align: center;
    }
    
    .song-row {
        flex-wrap: wrap;
    }
    
    .song-row-player {
        width: 100%;
        margin-top: var(--spacing-sm);
    }
    
    .song-player-small {
        width: 100%;
    }
    
    /* Song detail responsive */
    .song-detail-header {
        grid-template-columns: 1fr;
    }
    
    .song-detail-cover {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .song-detail-info {
        text-align: center;
    }
    
    .song-detail-actions {
        justify-content: center;
    }
    
    .song-detail-stats {
        justify-content: center;
    }
    
    /* Profile responsive */
    .profile-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-stats {
        justify-content: center;
    }
    
    .profile-actions {
        justify-content: center;
    }
    
    /* Comments responsive */
    .comment-input-wrapper {
        flex-direction: column;
    }
    
    .comment-input-wrapper .btn {
        align-self: stretch;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }
    
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .pagination {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .search-form-large {
        flex-direction: column;
    }
    
    .profile-avatar {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }
    
    .profile-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
}