/* CSS Variables - White Background + Purple #3c00ce */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f7ff;
    --bg-tertiary: #f0edff;
    --accent-primary: #3c00ce;
    --accent-secondary: #5a1fff;
    --accent-light: #7a3fff;
    --accent-dark: #2d009e;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border: #e5e5e5;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

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

html, body {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overscroll-behavior: none;
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* Installation Banner */
.install-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--accent-primary);
    color: #ffffff;
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    z-index: 1000;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.install-banner.hidden {
    display: none;
}

.install-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: #ffffff;
}

.install-content svg {
    color: #ffffff;
}

.install-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: #ffffff;
    color: var(--accent-primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.install-btn:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: scale(1.05);
}

.install-close {
    font-size: 1.5rem;
    color: #ffffff;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.install-close:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Welcome Screen */
.welcome-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.welcome-screen.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
}

.welcome-content {
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.welcome-logo {
    margin-bottom: var(--spacing-xl);
}

.welcome-album {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(60, 0, 206, 0.3);
    object-fit: cover;
}

.welcome-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.welcome-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.welcome-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.feature-item svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

.welcome-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.welcome-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.welcome-btn.primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(60, 0, 206, 0.3);
}

.welcome-btn.primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(60, 0, 206, 0.4);
}

.welcome-btn.primary:active {
    transform: translateY(0);
}

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

.welcome-btn.secondary:hover {
    background: var(--bg-tertiary);
}

.welcome-instructions {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.welcome-help {
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.welcome-help:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo h1 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.menu-btn {
    width: 40px;
    height: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: var(--spacing-xs);
}

.menu-btn span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Side Menu */
.side-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100%;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    z-index: 200;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
}

.side-menu.active {
    transform: translateX(0);
}

.menu-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.menu-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.menu-close {
    font-size: 2rem;
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.menu-close:hover {
    color: var(--text-primary);
}

.menu-nav {
    flex: 1;
    padding: var(--spacing-md);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.menu-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.menu-item.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.menu-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.storage-info {
    font-size: 0.75rem;
}

.storage-label {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.storage-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.storage-fill {
    height: 100%;
    background: var(--accent-secondary);
    border-radius: 3px;
    transition: width var(--transition-base);
}

.storage-text {
    color: var(--text-tertiary);
    text-align: right;
}

/* Overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 150;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-md);
    padding-bottom: calc(80px + var(--spacing-lg)); /* Space for bottom nav */
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.section {
    display: none;
    animation: fadeIn var(--transition-base);
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Album Art */
.album-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto var(--spacing-xl);
    aspect-ratio: 1;
}

.album-art {
    width: 100%;
    height: 100%;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border);
    transition: transform var(--transition-slow);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.album-art:hover {
    transform: scale(1.02);
}

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

.album-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
}

.vinyl-effect {
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    border: 2px solid var(--border);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.album-art.playing ~ .vinyl-effect {
    opacity: 0.3;
    animation: spin 3s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Track Info */
.track-info {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.track-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

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

/* Progress Bar */
.progress-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.time-current,
.time-total {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    min-width: 40px;
}

.time-total {
    text-align: right;
}

.progress-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-secondary);
    border-radius: 2px;
    position: relative;
    cursor: pointer;
}

.progress-fill {
    height: 100%;
    background: var(--accent-secondary);
    border-radius: 2px;
    transition: width 100ms linear;
}

.progress-handle {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--accent-secondary);
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.progress-bar:hover .progress-handle {
    opacity: 1;
}

/* Controls */
.controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.control-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.control-btn:hover {
    background: var(--bg-secondary);
    transform: scale(1.1);
}

.control-btn:active {
    transform: scale(0.95);
}

.play-btn {
    width: 64px;
    height: 64px;
    background: var(--accent-primary);
    color: #ffffff;
}

.play-btn:hover {
    background: var(--accent-secondary);
    transform: scale(1.1);
}

.play-btn svg {
    color: #ffffff;
}

.play-icon,
.pause-icon {
    transition: opacity var(--transition-fast);
}

.hidden {
    display: none !important;
}

/* Playlist */
.playlist {
    margin-top: var(--spacing-xl);
}

/* Install Card */
.install-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.install-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(255,255,255,0.1), transparent);
    pointer-events: none;
}

.install-card.hidden {
    display: none;
}

.install-card-content {
    position: relative;
    z-index: 1;
}

.install-card-content svg {
    margin: 0 auto var(--spacing-md);
    opacity: 0.9;
}

.install-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.install-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.install-card-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--accent-primary);
    color: #ffffff;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-sm);
    width: 100%;
    max-width: 280px;
}

.install-card-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.install-card-btn svg {
    color: #ffffff;
}

.install-card-btn:active {
    transform: translateY(0);
}

.install-card-instructions {
    display: block;
    width: 100%;
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.install-card-instructions:hover {
    color: var(--text-primary);
}

/* Instructions Modal */
.instructions-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.instructions-modal.active {
    opacity: 1;
    pointer-events: all;
}

.instructions-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

.instructions-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    border-radius: 50%;
}

.instructions-close:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.instructions-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.02em;
}

.instructions-platform {
    margin-bottom: var(--spacing-xl);
}

.instructions-platform h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.instructions-platform ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.instructions-platform li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
    color: var(--text-secondary);
}

.instructions-platform strong {
    color: var(--text-primary);
    font-weight: 600;
}

.instructions-note {
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.instructions-action {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--accent-primary);
    color: #ffffff;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.instructions-action:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
}

/* Playlist */
.playlist {
    margin-top: var(--spacing-xl);
}

.playlist-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
}

.playlist-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.playlist-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.playlist-item.active {
    background: var(--bg-tertiary);
    border-color: var(--accent-secondary);
}

.playlist-item-number {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.playlist-item.active .playlist-item-number {
    color: var(--accent-secondary);
}

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

.playlist-item-title {
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.playlist-item-duration {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.playlist-item-icon {
    color: var(--text-secondary);
}

.playlist-item.downloaded .playlist-item-icon {
    color: var(--success);
}

/* Section Header */
.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

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

/* Download Stats */
.download-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Download Actions */
.download-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

.action-btn.primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
}

.action-btn.primary svg {
    color: #ffffff;
}

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

.action-btn.secondary:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Download List */
.download-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.download-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

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

.download-item-title {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.download-item-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.download-item-progress {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.download-item-progress-fill {
    height: 100%;
    background: var(--accent-secondary);
    transition: width var(--transition-base);
}

.download-item-action {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.download-item-action:hover {
    background: var(--bg-tertiary);
}

/* Social Grid */
.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.social-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.social-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.social-card.instagram::before {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.social-card.youtube::before {
    background: #ff0000;
}

.social-card.tiktok::before {
    background: linear-gradient(45deg, #00f2ea, #ff0050);
}

.social-card.website::before {
    background: var(--accent);
}

.social-card:hover::before {
    opacity: 0.1;
}

.social-card:hover {
    transform: translateY(-4px);
    border-color: currentColor;
}

.social-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.social-content {
    position: relative;
    z-index: 1;
}

.social-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.social-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.loading-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

#loading-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    z-index: 1000;
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    pointer-events: all;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--error);
}

.toast.warning {
    border-color: var(--warning);
}

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

/* Responsive */
@media (max-width: 640px) {
    .main-content {
        padding: var(--spacing-md);
    }
    
    .download-stats {
        grid-template-columns: 1fr;
    }
    
    .download-actions {
        flex-direction: column;
    }
    
    .social-grid {
        grid-template-columns: 1fr;
    }
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-xs) 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-tertiary);
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
    flex: 1;
    max-width: 100px;
}

.nav-item:hover,
.nav-item.active {
    color: var(--accent-secondary);
}

.nav-item svg {
    transition: transform var(--transition-fast);
}

.nav-item:active svg {
    transform: scale(0.9);
}

/* iOS Safe Area */
@supports (padding: env(safe-area-inset-bottom)) {
    .app-header {
        padding-top: calc(var(--spacing-sm) + env(safe-area-inset-top));
    }
    
    .main-content {
        padding-bottom: calc(80px + var(--spacing-lg) + env(safe-area-inset-bottom));
    }
    
    .bottom-nav {
        padding-bottom: calc(var(--spacing-xs) + env(safe-area-inset-bottom));
    }
}