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

:root {
    --bg-base: #000;
    --bg-elevated: #121212;
    --bg-surface: #1a1a1a;
    --bg-highlight: #1a1a1a;
    --bg-card: #181818;
    --bg-card-hover: #282828;
    --text-primary: #fff;
    --text-secondary: #b3b3b3;
    --text-subdued: #6a6a6a;
    --accent: #1db954;
    --accent-hover: #1ed760;
    --sidebar-width: 280px;
    --now-playing-height: 72px;
    --topbar-height: 64px;
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
}

/* Layout */
body {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr var(--now-playing-height);
    gap: 0;
}

/* Sidebar */
.sidebar {
    grid-row: 1 / 2;
    background: var(--bg-base);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-logo {
    padding: 24px 24px 16px;
    display: flex;
    align-items: center;
}

.sidebar-nav {
    list-style: none;
    padding: 0 12px 8px;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 12px;
    border-radius: 4px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: color 0.2s;
}

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

.sidebar-library {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-elevated);
    border-radius: 8px;
    margin: 0 8px 8px;
    overflow: hidden;
}

.library-header {
    padding: 12px 16px 8px;
}

.library-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: color 0.2s;
}

.library-header-left:hover {
    color: var(--text-primary);
}

.library-filters {
    padding: 0 16px 8px;
}

.filter-chip {
    background: var(--bg-card-hover);
    border: none;
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.filter-chip.active {
    background: var(--text-primary);
    color: var(--bg-base);
}

.library-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 8px 8px;
}

.library-list::-webkit-scrollbar {
    width: 8px;
}

.library-list::-webkit-scrollbar-thumb {
    background: hsla(0,0%,100%,.3);
    border-radius: 4px;
}

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

.library-item:hover {
    background: var(--bg-highlight);
}

.library-item.active {
    background: var(--bg-card-hover);
}

.library-item-img {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    object-fit: cover;
    flex-shrink: 0;
}

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

.library-item-title {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.library-item.active .library-item-title {
    color: var(--accent);
}

.library-item-meta {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content */
.main-content {
    grid-row: 1 / 2;
    background: var(--bg-elevated);
    border-radius: 8px;
    margin: 8px 8px 8px 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Top Bar */
.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: transparent;
    pointer-events: none;
}

.topbar > * {
    pointer-events: all;
}

.topbar-nav {
    display: flex;
    gap: 8px;
}

.topbar-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0,0,0,0.7);
    border: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}

.topbar-btn:disabled {
    opacity: 0.6;
    cursor: default;
}

.topbar-btn:not(:disabled):hover {
    background: rgba(0,0,0,0.9);
}

.profile-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #535353;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    overflow: hidden;
}

.profile-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Views */
.view {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 24px;
}

.view::-webkit-scrollbar {
    width: 8px;
}

.view::-webkit-scrollbar-thumb {
    background: hsla(0,0%,100%,.3);
    border-radius: 4px;
}

.hidden {
    display: none !important;
}

/* Home View */
.greeting-section {
    padding: 24px 32px 0;
}

.greeting-section h1 {
    font-size: 32px;
    font-weight: 700;
}

/* Playlist Grid */
.section {
    padding: 24px 32px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 24px;
    font-weight: 700;
}

.playlist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 24px;
}

.playlist-card {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 16px;
    cursor: pointer;
    transition: background 0.3s;
    position: relative;
}

.playlist-card:hover {
    background: var(--bg-card-hover);
}

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

.card-img-wrapper {
    position: relative;
    margin-bottom: 16px;
}

.card-img {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 6px;
    object-fit: cover;
    box-shadow: 0 8px 24px rgba(0,0,0,.5);
}

.card-play-btn {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s, transform 0.3s, background 0.2s;
    box-shadow: 0 8px 16px rgba(0,0,0,.3);
}

.card-play-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.06);
}

.card-play-btn svg {
    fill: #000;
    width: 24px;
    height: 24px;
}

.card-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Playlist Detail View */
.playlist-header {
    display: flex;
    align-items: flex-end;
    gap: 24px;
    padding: 40px 32px 24px;
    background: linear-gradient(transparent 0, rgba(0,0,0,.5) 100%);
    position: relative;
}

.playlist-header-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.playlist-header > * {
    position: relative;
    z-index: 1;
}

.playlist-detail-img {
    width: 232px;
    height: 232px;
    border-radius: 4px;
    object-fit: cover;
    box-shadow: 0 4px 60px rgba(0,0,0,.5);
    flex-shrink: 0;
}

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

.playlist-type {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.playlist-detail-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 8px;
    word-wrap: break-word;
}

.playlist-detail-title.long-title {
    font-size: 32px;
}

.playlist-detail-title.very-long-title {
    font-size: 24px;
}

.playlist-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.playlist-meta {
    font-size: 14px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.playlist-meta-owner {
    font-weight: 700;
}

.playlist-meta-dot {
    margin: 0 4px;
    color: var(--text-secondary);
}

.playlist-meta-detail {
    color: var(--text-secondary);
}

/* Playlist Controls */
.playlist-controls {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 32px;
}

.play-large-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.1s, background 0.2s;
}

.play-large-btn:hover {
    transform: scale(1.06);
    background: var(--accent-hover);
}

.play-large-btn svg {
    fill: #000;
    width: 24px;
    height: 24px;
}

.open-spotify-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--text-subdued);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-subdued);
    transition: all 0.2s;
    text-decoration: none;
}

.open-spotify-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
    transform: scale(1.06);
}

.open-spotify-btn svg {
    width: 18px;
    height: 18px;
}

/* Track List */
.track-list-header {
    display: grid;
    grid-template-columns: 16px 4fr 2fr 1fr 1fr;
    gap: 16px;
    padding: 0 32px 8px;
    border-bottom: 1px solid hsla(0,0%,100%,.1);
    margin-bottom: 0;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    align-items: center;
}

.track-list-header .col-duration {
    display: flex;
    justify-content: flex-end;
    padding-right: 16px;
}

.track-row {
    display: grid;
    grid-template-columns: 16px 4fr 2fr 1fr 1fr;
    gap: 16px;
    padding: 8px 32px;
    border-radius: 4px;
    align-items: center;
    font-size: 14px;
    cursor: default;
    transition: background 0.2s;
}

.track-row:hover {
    background: hsla(0,0%,100%,.1);
}

.track-row.playing {
    background: hsla(0,0%,100%,.15);
}

.track-row.playing .track-num {
    color: var(--accent);
}

.track-row.playing .track-name {
    color: var(--accent);
}

/* Hide date column for Spotify playlists */
.playlist-tracks.hide-date-column .track-list-header,
.playlist-tracks.hide-date-column .track-row {
    grid-template-columns: 16px 4fr 2fr 1fr;
}

.playlist-tracks.hide-date-column .track-added {
    display: none;
}

.playlist-tracks.hide-date-column .track-list-header span:nth-child(4) {
    display: none;
}

.track-num {
    color: var(--text-secondary);
    font-size: 14px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.track-info {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

.track-img {
    width: 40px;
    height: 40px;
    border-radius: 2px;
    object-fit: cover;
    flex-shrink: 0;
}

.track-name-artist {
    min-width: 0;
}

.track-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.track-artist {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

.track-album {
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-album a {
    color: inherit;
    text-decoration: none;
}

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

.track-duration {
    color: var(--text-secondary);
    text-align: right;
    padding-right: 16px;
    font-variant-numeric: tabular-nums;
}

.track-added {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Now Playing Bar */
.now-playing-bar {
    grid-column: 1 / -1;
    grid-row: 2 / 3;
    background: var(--bg-base);
    border-top: 1px solid #282828;
    display: flex;
    align-items: center;
    padding: 0 16px;
    height: var(--now-playing-height);
}

.now-playing-left {
    width: 30%;
    min-width: 180px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.now-playing-center {
    flex: 1;
    max-width: 722px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.now-playing-right {
    width: 30%;
    min-width: 180px;
    display: flex;
    justify-content: flex-end;
}

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

.control-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    transition: color 0.2s;
}

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

.control-btn.play-btn {
    width: 32px;
    height: 32px;
    background: var(--text-primary);
    border-radius: 50%;
    color: var(--bg-base);
}

.control-btn.play-btn svg {
    fill: var(--bg-base);
}

.progress-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.progress-time {
    font-size: 11px;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.progress-track {
    flex: 1;
    height: 4px;
    background: #535353;
    border-radius: 2px;
    cursor: pointer;
}

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

.volume-control {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.volume-track {
    width: 93px;
    height: 4px;
    background: #535353;
    border-radius: 2px;
    cursor: pointer;
}

.volume-fill {
    height: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    width: 70%;
}

/* Open in Spotify link */
.open-spotify-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 32px 4px;
    transition: color 0.2s;
}

.open-spotify-link:hover {
    text-decoration: underline;
    color: var(--accent);
}

/* Search View */
.search-container {
    padding: 0 32px;
}

.search-input-wrapper {
    position: relative;
    max-width: 364px;
    margin-bottom: 24px;
}

.search-input {
    width: 100%;
    padding: 10px 12px 10px 40px;
    border-radius: 24px;
    border: none;
    background: var(--bg-card-hover);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
}

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

.search-input:focus {
    outline: 2px solid var(--text-primary);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-subdued);
}

/* Liked Songs special card */
.liked-songs-gradient {
    background: linear-gradient(135deg, #450af5, #c4efd9);
}

/* Responsive */
@media (max-width: 900px) {
    body {
        grid-template-columns: 1fr;
    }
    .sidebar {
        display: none;
    }
    .main-content {
        margin: 0;
        border-radius: 0;
    }
    .playlist-detail-img {
        width: 160px;
        height: 160px;
    }
    .playlist-detail-title {
        font-size: 32px;
    }
    .playlist-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 16px;
    }
}

@media (max-width: 600px) {
    .playlist-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .playlist-detail-img {
        width: 200px;
        height: 200px;
    }
    .playlist-meta {
        justify-content: center;
    }
    .track-list-header,
    .track-row {
        grid-template-columns: 16px 1fr 80px;
    }
    .track-album,
    .track-added {
        display: none;
    }
}

/* YouTube Video Player */
.now-playing-video {
    width: 100px;
    height: 56px;
    background: #000;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
    pointer-events: none;
}

.now-playing-video iframe {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    pointer-events: none;
}

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

.now-playing-track {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.now-playing-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.now-playing-artist {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.now-playing-artist:hover {
    text-decoration: underline;
}


/* Enhanced Progress Bar */
.progress-track {
    position: relative;
}

.progress-track:hover .progress-fill {
    background: var(--accent);
}

.progress-track::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    transform: translateY(-50%);
    background: transparent;
    border-radius: 2px;
}

/* Enhanced Volume Control */
.volume-track {
    position: relative;
}

.volume-track:hover .volume-fill {
    background: var(--accent);
}

/* Track Row Hover for Playback */
.track-row {
    cursor: pointer;
}

.track-row:hover .track-num {
    color: var(--text-primary);
}

/* Button Active States */
.control-btn.active {
    color: var(--accent);
}

#shuffleBtn.active {
    color: var(--accent);
}

/* Mobile Responsive Updates */
@media (max-width: 900px) {
    .now-playing-video {
        width: 80px;
        height: 45px;
    }
}

@media (max-width: 600px) {
    .now-playing-left {
        min-width: 120px;
    }

    .now-playing-video {
        width: 64px;
        height: 36px;
    }

    .now-playing-name {
        font-size: 12px;
    }

    .now-playing-artist {
        font-size: 11px;
    }

    .player-controls {
        gap: 8px;
    }

    .control-btn {
        width: 28px;
        height: 28px;
    }

    #shuffleBtn {
        display: none;
    }
}