style.css

/* ===== 全局重置 & 简约基础 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f5f5f7;
    --surface: #ffffff;
    --surface-hover: #f0f0f2;
    --text: #1d1d1f;
    --text-muted: #6e6e73;
    --text-dim: #8e8e93;
    --border: #d2d2d7;
    --primary: #007aff;
    --primary-hover: #005bb5;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --radius: 12px;
    --transition: 0.2s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
}

/* ===== 深色主题 ===== */
[data-theme="dark"] {
    --bg: #1a1a1e;
    --surface: #26262b;
    --surface-hover: #333338;
    --text: #e4e4e8;
    --text-muted: #9999a3;
    --text-dim: #6b6b76;
    --border: #3a3a40;
    --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

[data-theme="dark"] .album-art {
    background: #2a2a30;
    color: #6b6b76;
}

[data-theme="dark"] .progress-handle { background: #d4d4d8; }
[data-theme="dark"] .toast-notification { background: #333338; }
[data-theme="dark"] .changelog-pagination button { background: #333338; border-color: #444; }
[data-theme="dark"] .changelog-pagination button:hover { background: #3e3e44; }
[data-theme="dark"] .changelog-item { background: #1e1e22; }
[data-theme="dark"] .volume-wrapper,
[data-theme="dark"] .search-input,
[data-theme="dark"] .speed-btn,
[data-theme="dark"] .mode-btn { background: #1e1e22; }
[data-theme="dark"] .song-item.active { background: rgba(0,122,255,0.15); }
[data-theme="dark"] .mobile-menu-backdrop { background: rgba(0,0,0,0.5); }
[data-theme="dark"] .search-input:focus { box-shadow: 0 0 0 3px rgba(0,122,255,0.25); }
[data-theme="dark"] .changelog-overlay { background: rgba(0,0,0,0.55); }
[data-theme="dark"] .auto-refresh-toggle { background: #222; border-color: #444; }
[data-theme="dark"] .auto-refresh-toggle:hover { background: #333; }

/* 主题切换图标 */
[data-theme="dark"] .header-btn.theme-toggle .icon-sun,
.header-btn.theme-toggle .icon-moon { transition: transform 0.3s ease, opacity 0.3s ease; }

[data-theme="dark"] .header-btn.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .header-btn.theme-toggle .icon-moon { display: block; }
.header-btn.theme-toggle .icon-moon { display: none; }
.header-btn.theme-toggle .icon-sun { display: block; }

/* ===== 主题切换过渡 ===== */
body { transition: background-color 0.35s ease, color 0.35s ease; }

/* ===== 性能优化 ===== */
.song-list { contain: layout style; }
.album-art.playing img { will-change: transform; }
.folder-songs { content-visibility: auto; contain-intrinsic-size: 0 500px; }
#visualizer { contain: content; }
.progress-fill { will-change: width; }
.search-input { will-change: border-color, box-shadow; }

/* ===== 顶部按钮 ===== */
.header-buttons {
    position: fixed;
    top: 16px;
    right: 20px;
    display: flex;
    gap: 6px;
    z-index: 1112;
}

.header-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.header-btn:hover {
    background: var(--surface-hover);
    color: var(--text);
}

/* ===== 移动端菜单 ===== */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 14px;
    left: 16px;
    z-index: 1101;
    align-items: center;
    gap: 6px;
    padding: 0 14px;
    height: 44px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 30px;
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.mobile-menu-toggle:hover {
    background: var(--surface-hover);
}
.mobile-menu-text {
    display: inline;
}
.mobile-menu-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 1099;
}

/* ===== 主布局 ===== */
.app {
    display: grid;
    grid-template-columns: var(--sidebar-width, 320px) 1fr;
    grid-template-rows: 1fr auto;
    height: 100vh;
    position: relative;
}

/* 侧边栏拖拽手柄（PC 端调整宽度） */
.sidebar-resizer {
    position: absolute;
    top: 0;
    bottom: 0;
    left: var(--sidebar-width, 320px);
    width: 5px;
    cursor: col-resize;
    z-index: 6;
    background: transparent;
    transition: background 0.15s ease;
}
.sidebar-resizer:hover,
.sidebar-resizer.dragging {
    width: 9px;
    background: var(--primary);
    opacity: 0.5;
}

/* ===== 侧边栏 ===== */
.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    grid-row: 1 / 3;
    overflow: hidden;
}

.sidebar-header {
    padding: 24px 20px 16px;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}
.logo-text {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.search-container {
    position: relative;
}
.search-mode-toggle {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}
.mode-btn {
    flex: 1;
    padding: 5px 8px;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-muted);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}
.mode-btn:hover {
    background: var(--surface-hover);
    color: var(--text);
}
.mode-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.search-wrapper {
    position: relative;
}
.search-input {
    width: 100%;
    padding: 12px 44px 12px 44px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    outline: none;
    transition: var(--transition);
}
.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}
.search-input.regex-invalid {
    border-color: #e53e3e;
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.15);
}
[data-theme="dark"] .search-input.regex-invalid {
    border-color: #f87171;
    box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
}
.search-input::placeholder {
    color: var(--text-muted);
}
.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}
.refresh-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.refresh-btn:hover {
    background: var(--surface-hover);
    color: var(--text);
}
.refresh-btn.loading ion-icon {
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 搜索历史 */
.search-history {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    z-index: 100;
    max-height: 280px;
    overflow-y: auto;
    display: none;
}
.search-history.show {
    display: block;
}
.search-history-header {
    display: flex;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-muted);
}
.search-history-clear {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 12px;
}
.search-history-clear:hover {
    text-decoration: underline;
}
.search-history-list {
    padding: 6px;
}
.search-history-item {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.search-history-item:hover {
    background: var(--surface-hover);
}
.search-history-item ion-icon {
    margin-right: 10px;
    color: var(--text-muted);
}
.search-history-text {
    flex: 1;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.search-history-delete {
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
}
.search-history-item:hover .search-history-delete {
    opacity: 1;
}
.search-history-delete:hover {
    color: #ff3b30;
}
.search-history-empty {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* 歌曲列表 */
.song-list-container {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* ===== 歌单栏 ===== */
.playlist-bar {
    padding: 10px 12px 4px;
    border-bottom: 1px solid var(--border);
}
.playlist-selector-row {
    display: flex;
    align-items: center;
    gap: 6px;
}
.playlist-select {
    flex: 1;
    min-width: 0;
    padding: 7px 10px;
    font-size: 13px;
    font-family: inherit;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.playlist-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}
.playlist-action-btn {
    flex: 0 0 auto;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text-muted);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.playlist-action-btn:hover:not(:disabled) {
    background: var(--surface-hover);
    color: var(--text);
}
.playlist-action-btn.disabled,
.playlist-action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.playlist-io-row {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 6px;
}
.playlist-io-btn {
    padding: 4px 10px;
    font-size: 12px;
    font-family: inherit;
    color: var(--text-muted);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.playlist-io-btn:hover {
    background: var(--surface-hover);
    color: var(--text);
}
.song-count {
    padding: 12px 20px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border);
}
.auto-refresh {
    flex: 1;
    text-align: right;
    white-space: nowrap;
}
.auto-refresh-toggle {
    font-size: 12px;
    font-weight: 500;
    padding: 3px 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}
.auto-refresh-toggle:hover {
    background: var(--surface-hover);
    color: var(--text);
}
.auto-refresh-toggle.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.song-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px 20px;
}
.song-list::-webkit-scrollbar {
    width: 5px;
}
.song-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.folder-group {
    margin-bottom: 4px;
}
.folder-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}
.folder-header:hover {
    background: var(--surface-hover);
}
.folder-toggle {
    transition: transform 0.2s;
}
.folder-group.collapsed .folder-toggle {
    transform: rotate(-90deg);
}
.folder-songs {
    padding-left: 20px;
}
.folder-songs.collapsed {
    display: none;
}
.folder-icon {
    opacity: 0.6;
}

.song-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.song-item:hover {
    background: var(--surface-hover);
}
.song-item.active {
    background: rgba(0, 122, 255, 0.08);
}
.song-num {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dim);
    width: 24px;
    text-align: center;
}
.song-play {
    display: none; /* 简化，隐藏播放指示，保持干净 */
}
.song-item.active .song-num {
    color: var(--primary);
}
.song-checkbox {
    flex: 0 0 auto;
    width: 16px;
    height: 16px;
    margin: 0;
    accent-color: var(--primary);
    cursor: pointer;
}
.song-remove-btn {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    font-size: 16px;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    opacity: 0.55;
    transition: var(--transition);
}
.song-item:hover .song-remove-btn {
    opacity: 1;
}
.song-remove-btn:hover {
    background: var(--surface-hover);
    color: #ff453a;
}
.song-item.song-ghost {
    background: rgba(255, 69, 58, 0.08);
    cursor: pointer;
}
.song-item.song-ghost .song-title-text {
    color: #ff453a;
    text-decoration: line-through;
}
.song-item.song-ghost .song-folder {
    color: #ff453a;
}
.song-info {
    flex: 1;
    min-width: 0;
}
.song-title-text {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.search-highlight {
    background: #fff3cd;
    color: #856404;
    border-radius: 2px;
    padding: 0 1px;
}
[data-theme="dark"] .search-highlight {
    background: #5a4a00;
    color: #ffd54f;
}
.song-folder {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== 主内容 ===== */
.main-content {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg);
}
.content-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
}
.now-playing {
    text-align: center;
    max-width: 440px;
    width: 100%;
}
.album-container {
    position: relative;
    margin-bottom: 32px;
}
.album-art {
    width: 280px;
    height: 280px;
    border-radius: 20px;
    background: #e5e5ea;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: #8e8e93;
    box-shadow: var(--shadow);
}
.album-glow {
    display: none; /* 去除装饰 */
}
.song-info-display {
    margin-bottom: 24px;
    overflow: hidden;
}
.current-title {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
    display: -webkit-box;
    line-clamp: 2;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-all;
}
.current-artist,
.current-path {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.current-artist {
    font-size: 15px;
    color: var(--text-muted);
    min-height: 22px;
}
.current-path {
    font-size: 12px;
    color: var(--text-dim);
    min-height: 18px;
}
.lyrics-container {
    margin-top: 12px;
    min-height: 28px;
}
.lyrics-placeholder {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    opacity: 0.6;
}
.lyrics-lines {
    max-height: 130px;
    overflow-y: auto;
    scroll-behavior: smooth;
    text-align: center;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%);
}
.lyrics-line {
    padding: 3px 16px;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-muted);
    transition: var(--transition);
    cursor: pointer;
    border-radius: 4px;
}
.lyrics-line:hover {
    color: var(--text);
}
.lyrics-line.active {
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    opacity: 1;
}
.lyrics-lines::-webkit-scrollbar {
    width: 4px;
}
.lyrics-lines::-webkit-scrollbar-track {
    background: transparent;
}
.lyrics-lines::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
.lyrics-lines::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}
.lyrics-lines {
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.visualizer-container {
    margin-top: 16px;
}
#visualizer {
    width: 100%;
    max-width: 480px;
    height: 48px;
    border-radius: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
}

/* ===== 播放器栏 ===== */
.player-bar {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 16px 24px;
}
.progress-section {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}
.time-display {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    min-width: 44px;
    font-variant-numeric: tabular-nums;
}
.progress-bar {
    flex: 1;
    height: 5px;
    background: var(--border);
    border-radius: 4px;
    cursor: pointer;
    position: relative;
}
.progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    width: 0%;
    position: relative;
}
.progress-handle {
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%) scale(0.8);
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    opacity: 0;
    transition: var(--transition);
}
.progress-bar:hover .progress-handle {
    opacity: 1;
    transform: translateY(-50%) scale(1);
}

.player-controls-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.controls-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
.control-btn {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0.7;
}
.control-btn:hover {
    opacity: 1;
    background: var(--surface-hover);
}
.control-btn.active {
    opacity: 1;
    color: var(--primary);
}
.play-btn {
    width: 56px;
    height: 56px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    font-size: 24px;
    opacity: 1;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25);
}
.play-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.04);
}
.speed-btn-wrap {
    position: relative;
}
.speed-btn {
    border-radius: 20px;
    padding: 6px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    gap: 4px;
}
.speed-label {
    font-size: 13px;
    font-weight: 500;
    min-width: 36px;
}
.speed-menu {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px;
    display: none;
    flex-direction: column;
    gap: 2px;
    min-width: 80px;
    z-index: 100;
    box-shadow: var(--shadow);
}
.speed-menu.show {
    display: flex;
}
.speed-menu button {
    background: none;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    color: var(--text);
    transition: var(--transition);
}
.speed-menu button:hover {
    background: var(--surface-hover);
}
.speed-menu button.active {
    color: var(--primary);
    font-weight: 500;
}

.share-btn-wrap {
    position: relative;
}
.share-menu {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    right: 0;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 6px;
    width: 260px;
    z-index: 100;
    box-shadow: var(--shadow);
}
.share-menu.show {
    display: flex;
}
.share-option {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: none;
    border: none;
    border-radius: 8px;
    padding: 10px 14px;
    cursor: pointer;
    text-align: left;
    color: var(--text);
    transition: var(--transition);
}
.share-option:hover {
    background: var(--surface-hover);
}
.share-option-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}
.share-option-desc {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
}
[data-theme="dark"] .share-option:hover {
    background: #2a2a35;
}

.repeat-one-badge {
    position: absolute;
    top: 0;
    right: 0;
    width: 14px;
    height: 14px;
    background: var(--primary);
    color: #fff;
    font-size: 9px;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.volume-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 12px;
    background: var(--bg);
    border-radius: 30px;
}
.volume-slider {
    width: 90px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 4px;
    outline: none;
}
.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
}
.volume-icon {
    display: flex;
    align-items: center;
    color: var(--text-muted);
}

/* ===== 加载 & 空状态 ===== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    color: var(--text-muted);
}
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}
.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

/* ===== 面板（更新日志 / API 文档） ===== */
.changelog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(2px);
    z-index: 1000;
    display: none;
}
.changelog-overlay.show { display: block; }
.changelog-panel,
.apidoc-panel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.96);
    width: 90%;
    max-width: 560px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.15);
    z-index: 1001;
    display: none;
    flex-direction: column;
    max-height: 70vh;
}
.changelog-panel.show,
.apidoc-panel.show {
    display: flex;
    animation: panelIn 0.18s ease-out forwards;
}
@keyframes panelIn { to { transform: translate(-50%, -50%) scale(1); } }
.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
}
.changelog-header h3 { font-size: 18px; font-weight: 600; }
.changelog-close {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.changelog-close:hover { background: var(--surface-hover); color: var(--text); }
.changelog-content,
.apidoc-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 24px;
}

/* 更新日志条目 */
.changelog-item {
    padding: 16px;
    border-radius: 12px;
    background: var(--bg);
    margin-bottom: 10px;
    border: 1px solid var(--border);
    transition: border-color 0.2s;
}
.changelog-item:hover { border-color: var(--primary); }

.changelog-item-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}
.changelog-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
    object-fit: cover;
}
.changelog-commit {
    font-size: 11px;
    color: var(--text-muted);
    font-family: monospace;
    background: rgba(0,122,255,0.08);
    padding: 2px 8px;
    border-radius: 4px;
    flex-shrink: 0;
}
.changelog-message {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 8px;
    word-break: break-word;
}
.changelog-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
}
.changelog-author {
    font-size: 12px;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 6px;
}
.changelog-author span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 120px;
}
.changelog-date {
    font-size: 11px;
    color: var(--text-dim);
    flex-shrink: 0;
}

/* 分页 */
.changelog-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    border-top: 1px solid var(--border);
}
.changelog-pagination button {
    min-width: 36px;
    height: 34px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 13px;
    transition: var(--transition);
    padding: 0 14px;
}
.changelog-pagination button:hover { background: var(--surface-hover); }
.changelog-pagination button.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    cursor: default;
    pointer-events: none;
}
.changelog-pagination button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}
.changelog-page-info {
    font-size: 13px;
    color: var(--text-muted);
    min-width: 60px;
    text-align: center;
}

/* 空态 / 错误 */
.changelog-empty,
.changelog-error {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}
/* ===== API 文档 ===== */
.apidoc-intro { padding-bottom: 12px; margin-bottom: 8px; border-bottom: 1px solid var(--border); }
.apidoc-subtitle { color: var(--text-muted); font-size: 14px; }

.apidoc-endpoint {
    padding: 20px;
    border-radius: 12px;
    background: var(--bg);
    margin-bottom: 16px;
    border: 1px solid var(--border);
}
.apidoc-ep-head { margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.apidoc-method {
    display: inline-flex;
    align-items: center;
    padding: 3px 12px;
    background: var(--primary);
    color: #fff;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    flex-shrink: 0;
}
.apidoc-path {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    word-break: break-all;
}
.apidoc-ep-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}
.apidoc-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}

/* 参数表格 */
.apidoc-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
    font-size: 13px;
}
.apidoc-table th {
    text-align: left;
    padding: 8px 10px;
    background: rgba(0,0,0,0.04);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.apidoc-table td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
.apidoc-table code {
    background: rgba(0,122,255,0.1);
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}
[data-theme="dark"] .apidoc-table th { background: rgba(255,255,255,0.04); }
[data-theme="dark"] .apidoc-table code { background: rgba(0,122,255,0.18); }

/* 示例代码块 */
.apidoc-example {
    margin-bottom: 10px;
    border-radius: 8px;
    overflow: hidden;
    background: #1e1e22;
    border: 1px solid #333;
}
.apidoc-example-label {
    font-size: 11px;
    padding: 4px 14px;
    color: #999;
    background: rgba(255,255,255,0.03);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}
.apidoc-example pre {
    margin: 0;
    padding: 12px 14px;
    overflow-x: auto;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: #c9d1d9;
    white-space: pre;
}
[data-theme="light"] .apidoc-example { background: #f6f8fa; border-color: #d0d7de; }
[data-theme="light"] .apidoc-example pre { color: #24292f; }
[data-theme="light"] .apidoc-example-label { color: #656d76; background: rgba(0,0,0,0.02); }

/* 注意事项 */
.apidoc-notes {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}
.apidoc-notes code {
    background: rgba(0,122,255,0.1);
    color: var(--primary);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 12px;
}

/* ===== Toast ===== */
.toast-notification {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 24px;
    font-size: 14px;
    color: var(--text);
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}
.toast-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== 统一模态提示（confirm/prompt，风格与 toast 一致）===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 3000;
    animation: modal-fade 0.18s ease;
}
@keyframes modal-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}
.modal-box {
    min-width: 280px;
    max-width: 90vw;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    animation: modal-pop 0.18s ease;
}
@keyframes modal-pop {
    from { transform: scale(0.96); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}
.modal-message {
    font-size: 14px;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 16px;
    word-break: break-word;
}
.modal-input {
    width: 100%;
    box-sizing: border-box;
    padding: 9px 12px;
    margin-bottom: 16px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    outline: none;
    transition: var(--transition);
}
.modal-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}
.modal-btn {
    padding: 8px 18px;
    font-size: 13px;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    transition: var(--transition);
}
.modal-btn:hover {
    background: var(--surface-hover);
}
.modal-btn.modal-ok {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.modal-btn.modal-ok:hover {
    background: var(--primary-hover);
}

/* ===== SHA-256 展示 ===== */
.sha-song {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    word-break: break-all;
}
.sha-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.sha-hex {
    display: block;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    word-break: break-all;
    user-select: all;
}
.sha-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 10px;
    line-height: 1.5;
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .app {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto;
    }
    .sidebar-resizer {
        display: none;
    }
    .sidebar {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        max-height: calc(100vh - 70px);
        z-index: 1100;
        transform: translateY(-110%);
        transition: transform 0.25s ease;
        border-radius: 0 0 20px 20px;
        border: 1px solid var(--border);
        border-top: none;
        background: var(--surface);
        overflow-y: auto;
    }
    #menuToggle:checked ~ .app .sidebar {
        transform: translateY(0);
    }
    #menuToggle:checked ~ .mobile-menu-backdrop {
        display: block;
        opacity: 1;
        visibility: visible;
    }
    .mobile-menu-backdrop {
        display: block;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.25s, visibility 0.25s;
    }
    .mobile-menu-toggle {
        display: flex;
    }
    .header-buttons {
        right: 16px;
        top: 12px;
    }
    .album-art {
        width: 200px;
        height: 200px;
        font-size: 60px;
    }
    .current-title {
        font-size: 22px;
        line-clamp: 2;
        -webkit-line-clamp: 2;
    }
    .player-controls-row {
        gap: 10px;
    }
    .volume-slider {
        width: 80px;
    }
}

@media (max-width: 600px) {
    .mobile-menu-toggle {
        top: 10px;
        left: 12px;
        height: 40px;
        padding: 0 12px;
        font-size: 13px;
    }
    .sidebar-header {
        padding: 16px;
    }
    .player-bar {
        padding: 12px;
    }
    .content-area {
        padding: 20px 12px;
    }
    .album-art {
        width: 160px;
        height: 160px;
        font-size: 48px;
    }
    .controls-wrapper {
        gap: 6px;
    }
    .play-btn {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
}

/* ===== 浏览维度切换（文件夹 / 歌手 / 专辑）===== */
.view-tabs {
    display: flex;
    gap: 2px;
    padding: 10px 12px 0;
}
.view-tab {
    flex: 1;
    min-width: 0;
    padding: 7px 0 9px;
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}
.view-tab:hover {
    color: var(--text);
}
.view-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.folder-header .folder-label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== 歌曲行音质徽标 / 时长 / 重复副本 ===== */
.song-title-row {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
}
.song-title-row .song-title-text {
    flex: 1;
    min-width: 0;
}
.song-badge-row {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 3px;
}
.song-badge {
    font-size: 9px;
    line-height: 1;
    font-weight: 600;
    letter-spacing: 0.03em;
    padding: 2px 4px;
    border-radius: 3px;
    background: var(--surface-hover);
    color: var(--text-muted);
}
.song-badge.badge-hires {
    color: #d97706;
    background: rgba(217, 119, 6, 0.12);
}
.song-meta {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 2px;
}
.song-duration {
    font-size: 11px;
    color: var(--text-dim);
    font-variant-numeric: tabular-nums;
}
.song-dup-btn {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    color: #d97706;
    background: rgba(217, 119, 6, 0.1);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}
.song-dup-btn:hover {
    background: rgba(217, 119, 6, 0.22);
}
.song-item.dup-flash {
    border-radius: var(--radius);
    box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.9);
}