* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    --bg-primary: #121212;
    --bg-secondary: #181818;
    --bg-elevated: #282828;
    --accent: #1db954;
    --accent-hover: #1ed760;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #6a6a6a;
    --border-radius: 8px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding-bottom: calc(70px + var(--safe-bottom));
    overflow-x: hidden;
}

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

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

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(180deg, #000000 0%, var(--bg-primary) 100%);
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    gap: 16px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.icon-btn:active {
    transform: scale(0.95);
    background: var(--accent);
}

/* Search Bar */
.search-container {
    padding: 0 16px 16px;
    position: sticky;
    top: 72px;
    z-index: 99;
    background: var(--bg-primary);
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 12px 16px;
    gap: 12px;
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

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

/* Sections */
.section {
    padding: 16px;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-title a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Horizontal Scroll */
.horizontal-scroll {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 8px;
    margin: 0 -16px;
    padding-left: 16px;
    padding-right: 16px;
}

.horizontal-scroll::-webkit-scrollbar {
    display: none;
}

/* Cards */
.card {
    flex: 0 0 auto;
    scroll-snap-align: start;
    width: 160px;
}

.card-cover {
    width: 160px;
    height: 160px;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 12px;
    position: relative;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

.card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.card-play {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(8px);
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.card:hover .card-play,
.card:active .card-play {
    opacity: 1;
    transform: translateY(0);
}

.card-title {
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Playlist Card (larger) */
.card-large {
    width: 200px;
}

.card-large .card-cover {
    width: 200px;
    height: 200px;
}

/* Song List */
.song-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.song-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.song-item:active {
    background: var(--bg-elevated);
}

.song-number {
    width: 32px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.song-cover {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
}

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

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

.song-title {
    font-size: 0.9375rem;
    font-weight: 500;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-artist {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.song-duration {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding-right: 8px;
}

/* Mini Player */
.mini-player {
    position: fixed;
    bottom: calc(56px + var(--safe-bottom));
    left: 8px;
    right: 8px;
    background: var(--bg-elevated);
    border-radius: 8px;
    padding: 8px 12px 6px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 110;
    box-shadow: 0 -4px 24px rgba(0,0,0,0.3);
    cursor: pointer;
    overflow: hidden;
}

.mini-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(255,255,255,0.1);
    cursor: pointer;
}

.mini-progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.1s linear;
}

.mini-cover {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
}

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

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

.mini-title {
    font-size: 0.8125rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mini-artist {
    font-size: 0.6875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.mini-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: none;
    border: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.mini-btn.play {
    background: var(--text-primary);
    color: #000;
}

/* Full Player */
.player-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 200;
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.player-overlay.active {
    display: flex;
}

.player-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: blur(80px) brightness(0.3);
    transform: scale(1.2);
}

.player-header {
    position: relative;
    z-index: 1;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.player-header-title {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: center;
    flex: 1;
}

.player-content {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 24px;
    gap: 32px;
}

.player-media {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 8px;
}

.player-cover {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    transition: transform 0.3s, opacity 0.3s;
}

.player-cover.hidden {
    transform: scale(0.9);
    opacity: 0;
    pointer-events: none;
}

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

.player-lyrics {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px 16px;
    text-align: center;
    opacity: 0;
    transform: scale(0.9);
    transition: transform 0.3s, opacity 0.3s;
    pointer-events: none;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.player-lyrics::-webkit-scrollbar {
    display: none;
}

.player-lyrics.active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.lyrics-line {
    font-size: 0.9375rem;
    line-height: 2.2;
    color: var(--text-secondary);
    transition: all 0.3s;
    padding: 2px 0;
}

.lyrics-line.active {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.lyrics-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.player-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.player-text {
    flex: 1;
    min-width: 0;
}

.player-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-artist {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.player-like {
    width: 48px;
    height: 48px;
    border: none;
    background: none;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Progress Bar */
.progress-container {
    position: relative;
    z-index: 1;
    padding: 0 24px;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    width: 0%;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s;
}

.progress-bar:active .progress-fill::after,
.progress-bar:hover .progress-fill::after {
    opacity: 1;
}

.progress-time {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 0.6875rem;
    color: var(--text-secondary);
}

/* Player Controls */
.player-controls {
    position: relative;
    z-index: 1;
    padding: 0 24px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ctrl-btn {
    width: 48px;
    height: 48px;
    border: none;
    background: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.ctrl-btn.shuffle.active,
.ctrl-btn.repeat.active {
    color: var(--accent);
}

.ctrl-btn.play-pause {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--text-primary);
    color: #000;
}

/* Bottom Nav */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-around;
    padding: 8px 0 calc(8px + var(--safe-bottom));
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 4px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.625rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-item.active {
    color: var(--text-primary);
}

.nav-item svg {
    width: 24px;
    height: 24px;
}

/* Playlist Header */
.playlist-header {
    position: relative;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    background: linear-gradient(180deg, #404040 0%, var(--bg-primary) 100%);
}

.playlist-header .card-cover {
    width: 200px;
    height: 200px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.5);
}

.playlist-info {
    text-align: center;
}

.playlist-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.playlist-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.playlist-actions {
    display: flex;
    gap: 24px;
    align-items: center;
}

.play-btn-large {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(29, 185, 84, 0.3);
}

/* Responsive */
@media (min-width: 768px) {
    body {
        max-width: 430px;
        margin: 0 auto;
        border-left: 1px solid var(--bg-elevated);
        border-right: 1px solid var(--bg-elevated);
    }
    
    .bottom-nav,
    .mini-player {
        max-width: 430px;
        left: 50%;
        transform: translateX(-50%);
    }
}

/* Loading */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

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

.section {
    animation: fadeIn 0.3s ease-out;
}