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

:root {
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent: #1db954;
    --accent-hover: #1ed760;
    --border: #333;
    --error: #e22134;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Modal */
.modal {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 8px 32px var(--shadow);
    max-height: 85vh;
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.modal-content::-webkit-scrollbar {
    display: none;
}

.modal-content h2 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.modal-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

#auth-token-input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

#auth-token-input:focus {
    outline: none;
    border-color: var(--accent);
}

.modal-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
}

.checkbox-label input {
    cursor: pointer;
}

.btn-primary {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

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

.error-message {
    color: var(--error);
    font-size: 0.9rem;
    min-height: 1.5rem;
    display: none;
}

.error-message.show {
    display: block;
}

/* Settings Modal */
.settings-content {
    max-width: 550px;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.settings-header h2 {
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.75rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.2s;
}

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

.settings-section {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.settings-section:last-of-type {
    border-bottom: none;
}

.settings-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.setting-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

/* Upload Area */
.upload-area {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
    padding: 1rem;
    border: 2px dashed var(--border);
    border-radius: 8px;
    transition: border-color 0.2s, background 0.2s;
}

.upload-area.drag-over {
    border-color: var(--accent);
    background: rgba(29, 185, 84, 0.1);
}

.upload-area input[type="file"] {
    flex: 1;
    min-width: 150px;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.btn-secondary {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-secondary:hover {
    background: var(--border);
}

.upload-status {
    margin-top: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
}

.upload-status.success {
    background: rgba(29, 185, 84, 0.2);
    color: var(--accent);
}

.upload-status.error {
    background: rgba(226, 33, 52, 0.2);
    color: var(--error);
}

.upload-status.info {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

/* Settings Footer */
.btn-danger {
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--error);
    border: 1px solid var(--error);
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s;
}

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

/* Search */
.search-container {
    position: relative;
    padding: 1rem 1.5rem;
}

#search-input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 24px;
    color: var(--text-primary);
    font-size: 1rem;
}

#search-input:focus {
    outline: none;
    border-color: var(--accent);
}

.search-icon {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

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

.tab-btn.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}

/* Views */
.view {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.5rem;
}

.view.active {
    display: block;
}

/* Tracks List */
.tracks-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.track-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

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

.track-item.playing {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.track-art {
    width: 56px;
    height: 56px;
    border-radius: 4px;
    object-fit: cover;
    background: var(--bg-tertiary);
}

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

.track-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.track-duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-width: 50px;
    text-align: right;
}

/* Albums Grid */
.albums-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

.album-card {
    cursor: pointer;
    transition: transform 0.2s;
}

.album-card:hover {
    transform: scale(1.05);
}

.album-art {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 8px;
    object-fit: cover;
    background: var(--bg-tertiary);
    margin-bottom: 0.75rem;
}

.album-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

/* Album Detail */
.album-detail {
    padding: 1rem 0;
}

.back-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
    transition: color 0.2s;
}

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

#album-info {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    align-items: flex-end;
}

.album-detail-art {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    object-fit: cover;
    background: var(--bg-tertiary);
}

.album-detail-text {
    flex: 1;
}

.album-detail-name {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.album-detail-artist {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

/* Now Playing Bar */
.now-playing {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 100;
}

.now-playing-art {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
}

.now-playing-art img {
    width: 100%;
    height: 100%;
    border-radius: 4px;
    object-fit: cover;
}

.now-playing-info {
    flex: 0 0 200px;
    min-width: 0;
}

.now-playing-title {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.now-playing-artist {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Controls (Play/Pause/Skip) */
.now-playing-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.control-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.2s;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.control-btn:hover {
    transform: scale(1.1);
    color: var(--text-primary);
}

.control-btn.active {
    color: var(--accent);
}

#prev-btn, #next-btn {
    font-size: 1.5rem;
}

.play-pause {
    font-size: 1.75rem;
    width: 44px;
    height: 44px;
}

/* Progress Bar Section */
.now-playing-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    max-width: 500px;
    margin: 0 auto;
}

.progress-bar {
    position: relative;
    flex: 1;
    height: 4px;
    display: flex;
    align-items: center;
}

.time-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    min-width: 35px;
    text-align: center;
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    pointer-events: none;
}

.progress-slider {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    margin: 0;
}

.progress-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
    transition: transform 0.1s;
}

.progress-slider:hover::-webkit-slider-thumb {
    transform: scale(1.2);
}

/* Volume Section */
.now-playing-volume {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 0 0 120px;
}

.volume-icon {
    font-size: 1rem;
    color: var(--text-secondary);
}

.volume-slider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-secondary);
    border-radius: 50%;
    cursor: pointer;
}

.volume-slider:hover::-webkit-slider-thumb {
    background: #fff;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Economy Toggle in Header */
.economy-toggle-header {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background 0.2s;
}

.economy-toggle-header:hover {
    background: var(--bg-tertiary);
}

.economy-toggle-header input {
    display: none;
}

.economy-toggle-header .toggle-icon {
    font-size: 1.25rem;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.economy-toggle-header input:checked + .toggle-icon {
    opacity: 1;
}

/* Toggle Switch Styles */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

.toggle-label input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    transition: background 0.2s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: var(--text-secondary);
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: transform 0.2s, background 0.2s;
}

.toggle-label input:checked + .toggle-slider {
    background: var(--accent);
}

.toggle-label input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: white;
}

.toggle-text {
    font-weight: 500;
}

/* Cache Controls */
.cache-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.75rem;
}

.cache-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Keyboard Shortcuts List */
.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.shortcut {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

kbd {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.85rem;
    min-width: 28px;
    text-align: center;
}

.shortcuts-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(3, auto);
    grid-auto-flow: column;
}

/* Track Meta (Artist + Album) */
.track-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
}

.track-meta span {
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-separator {
    color: var(--text-secondary);
    opacity: 0.5;
    flex-shrink: 0;
}

.track-album {
    opacity: 0.7;
}

/* Album Art Placeholder (Economy Mode) */
.album-art-placeholder {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 8px;
    background: var(--bg-tertiary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    opacity: 0.5;
}

.album-art-placeholder.small {
    font-size: 2rem;
    border-radius: 6px;
}