/* Cyberpunk-inspired dark theme */
:root {
    --bg-primary: #121212;
    --bg-secondary: #181818;
    --bg-elevated: #282828;
    --bg-highlight: #333333;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #6a6a6a;
    --accent: #48dbfb;
    --accent-hover: #0abde3;
    --error: #ff6b6b;
    --gradient-start: #ff6b6b;
    --gradient-mid: #feca57;
    --gradient-end: #48dbfb;
}

/* Cyberpunk logo style */
.logo-text {
    font-family: 'VT323', monospace;
    font-weight: 400;
    letter-spacing: 0.15em;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(255, 107, 107, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Login Screen */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    text-align: center;
}

.login-container h1 {
    font-size: 5rem;
    margin-bottom: 0.5rem;
    font-family: 'VT323', monospace;
    font-weight: 400;
    letter-spacing: 0.15em;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(255, 107, 107, 0.4));
}

.login-container p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.2rem;
}

/* Buttons */
.btn {
    padding: 12px 32px;
    border-radius: 500px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: scale(1.04);
}

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

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

.btn-large {
    padding: 16px 48px;
    font-size: 1.1rem;
}

/* Main Layout */
#main-app {
    display: grid;
    grid-template-columns: 240px 1fr;
    grid-template-rows: 1fr auto;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-secondary);
    padding: 24px 12px;
    display: flex;
    flex-direction: column;
    grid-row: 1 / 3;
}

.logo h2 {
    padding: 0 12px 24px;
    font-family: 'VT323', monospace;
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    display: inline-block;
    background: linear-gradient(90deg, #ff6b6b, #feca57, #48dbfb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.nav-menu {
    list-style: none;
}

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

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

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

.nav-item .icon {
    font-size: 1.2rem;
}

.playlists {
    margin-top: 24px;
    flex: 1;
    overflow-y: auto;
}

.playlists h3 {
    padding: 12px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.playlists ul {
    list-style: none;
}

.playlists li {
    padding: 8px 12px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.playlists li:hover {
    color: var(--text-primary);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    border-top: 1px solid var(--bg-elevated);
    margin-top: auto;
}

.user-info img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.user-info span {
    flex: 1;
    font-size: 0.9rem;
}

.logout-btn {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
}

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

/* Main Content */
.main-content {
    background: linear-gradient(180deg, #1a1a2e 0%, var(--bg-primary) 30%);
    overflow-y: auto;
    padding: 24px;
    padding-bottom: 120px;
}

.section {
    margin-bottom: 40px;
}

.section h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

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

.track-card {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.track-card:hover {
    background-color: var(--bg-elevated);
}

.track-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 16px;
}

.track-card .track-name {
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-card .track-artist {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Track List */
.track-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.track-row {
    display: grid;
    grid-template-columns: 50px 1fr 1fr 100px 50px;
    align-items: center;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
}

.track-row:hover {
    background-color: var(--bg-elevated);
}

.track-row img {
    width: 40px;
    height: 40px;
    border-radius: 4px;
}

.track-row .track-title {
    font-weight: 500;
}

.track-row .track-artist {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.track-row .track-album {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.track-row .track-duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: right;
}

.track-row .similarity {
    color: var(--accent);
    font-size: 0.85rem;
    text-align: right;
}

/* Search */
.search-container {
    margin-bottom: 24px;
}

#search-input {
    width: 100%;
    max-width: 400px;
    padding: 12px 16px;
    border-radius: 500px;
    border: none;
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    font-size: 1rem;
}

#search-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tab {
    padding: 8px 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 500px;
    font-weight: 600;
}

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

.tab.active {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
}

/* Recommendations */
.reco-controls {
    background-color: var(--bg-secondary);
    padding: 24px;
    border-radius: 8px;
    margin-bottom: 24px;
}

.seed-section {
    margin-bottom: 24px;
}

.seed-section h3 {
    margin-bottom: 8px;
}

.seed-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.seed-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.seed-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-elevated);
    padding: 6px 12px;
    border-radius: 500px;
    font-size: 0.9rem;
}

.seed-chip .remove-seed {
    cursor: pointer;
    color: var(--text-muted);
}

.seed-chip .remove-seed:hover {
    color: var(--error);
}

.feature-sliders {
    margin-bottom: 24px;
}

.feature-sliders h3 {
    margin-bottom: 16px;
}

.slider-group {
    margin-bottom: 12px;
}

.slider-group label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.slider-group input[type="range"] {
    width: 100%;
    max-width: 300px;
    accent-color: var(--accent);
}

.reco-controls .btn {
    margin-right: 12px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-secondary);
    padding: 32px;
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

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

.track-detail {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
}

.track-detail img {
    width: 150px;
    height: 150px;
    border-radius: 4px;
}

.track-detail .track-info h2 {
    margin-bottom: 8px;
}

.track-detail .track-info p {
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.audio-features h3 {
    margin-bottom: 16px;
}

.audio-features canvas {
    display: block;
    margin: 0 auto 24px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.feature-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    background-color: var(--bg-elevated);
    border-radius: 4px;
}

.feature-item .label {
    color: var(--text-secondary);
    text-transform: capitalize;
}

.feature-item .value {
    color: var(--accent);
    font-weight: 600;
}

.modal-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
}

/* Now Playing Bar */
.now-playing {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--bg-elevated);
    padding: 12px 16px;
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    align-items: center;
    gap: 16px;
}

.now-playing-track {
    display: flex;
    align-items: center;
    gap: 12px;
}

.now-playing-track img {
    width: 56px;
    height: 56px;
    border-radius: 4px;
}

.np-info {
    display: flex;
    flex-direction: column;
}

#np-name {
    font-weight: 500;
    font-size: 0.9rem;
}

#np-artist {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

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

.control-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
}

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

.play-btn {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-btn:hover {
    transform: scale(1.06);
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

.progress {
    height: 100%;
    background-color: var(--accent);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s;
}

.progress-bar:hover .progress {
    background-color: var(--accent-hover);
}

/* Image Placeholder */
.img-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-elevated);
    font-size: 2rem;
}

.track-card .img-placeholder {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 4px;
    margin-bottom: 16px;
    font-size: 3rem;
}

.track-row .img-placeholder {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    font-size: 1.5rem;
}

.track-detail .img-placeholder {
    width: 150px;
    height: 150px;
    border-radius: 4px;
    font-size: 4rem;
}

.now-playing-track .img-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 4px;
    font-size: 2rem;
}

.now-playing-track .img-placeholder.no-track {
    background: linear-gradient(135deg, #1a1a2e 0%, #2a2a4e 100%);
    box-shadow: 0 0 20px rgba(58, 134, 255, 0.3);
}

.user-info .img-placeholder {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1rem;
}

/* Mood Badge */
.mood-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 500px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.mood-energetic { background-color: #e91429; color: white; }
.mood-happy { background-color: #ffb703; color: black; }
.mood-sad { background-color: #3a86ff; color: white; }
.mood-acoustic { background-color: #8338ec; color: white; }
.mood-intense { background-color: #ff006e; color: white; }
.mood-melancholic { background-color: #5e60ce; color: white; }
.mood-chill { background-color: var(--accent); color: black; }

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-highlight);
}

/* Mobile Header */
.mobile-header {
    display: none;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: transparent;
}

.mobile-logo {
    font-size: 2rem;
    margin: 0;
    font-family: 'VT323', monospace;
    font-weight: 400;
    letter-spacing: 0.15em;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.visible {
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    #main-app {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
        background: linear-gradient(180deg, #1a1a2e 0%, var(--bg-primary) 30%);
    }

    .mobile-header {
        display: flex;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 280px;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        padding-top: 16px;
    }

    .track-row {
        grid-template-columns: 40px 1fr 60px;
    }

    .track-row .track-album {
        display: none;
    }

    .now-playing {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .progress-container {
        display: none;
    }
}