:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #121729;
    --bg-tertiary: #1a1f3a;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-error: #ef4444;
    --glass-bg: rgba(26, 31, 58, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.hidden {
    display: none !important;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

/* =============== 登录界面 =============== */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.95) 0%, rgba(18, 23, 41, 0.95) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-box {
    padding: 3rem;
    width: 420px;
    max-width: 90%;
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

.login-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 1rem;
}

.logo-icon {
    width: 56px;
    height: 56px;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.login-box h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.login-box input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    margin: 1rem 0;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

/* .login-box input focus consolidated with form-input:focus below */

.btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
    filter: brightness(1.1);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    padding: 0.875rem 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* =============== 主应用布局 =============== */
#app {
    display: flex;
    min-height: 100vh;
}

/* =============== 侧边栏 =============== */
.sidebar {
    width: 260px;
    padding: 2rem 1rem;
    margin: 1rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: sticky;
    top: 1rem;
    height: calc(100vh - 2rem);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 0.5rem;
}

.sidebar-header .logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
    min-height: 0;
    /* Hide scrollbar for Chrome, Safari and Opera */
    -ms-overflow-style: none;
    /* IE and Edge */
    scrollbar-width: none;
    /* Firefox */
}

.sidebar-nav::-webkit-scrollbar {
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: var(--shadow-md);
}

.sidebar-divider {
    height: 1px;
    background: var(--glass-border);
    margin: 0.5rem 0;
    flex-shrink: 0;
}

.sidebar-nav-bottom {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.sidebar-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.btn-logout {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 12px;
    color: var(--accent-error);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.3);
}

/* =============== 主内容区 =============== */
.main-content {
    flex: 1;
    padding: 1rem 1rem 1rem 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.top-bar {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1.25rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 2rem;
}

.top-bar h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-header-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 8px;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-success);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.content-wrapper {
    flex: 1;
    padding: 0 2rem 2rem;
    overflow-y: auto;
}

/* =============== 视图管理 =============== */
.view {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.view.active {
    display: block;
}

.view-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

/* =============== 统计卡片 =============== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: transparent !important; /* 移除底色块 */
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.users-icon svg, .icon-blue svg { color: #3b82f6 !important; }
.devices-icon svg, .icon-purple svg { color: #8b5cf6 !important; }
.uptime-icon svg, .icon-green svg { color: #10b981 !important; }
.cpu-icon svg { color: #3b82f6 !important; }
.mem-icon svg { color: #f59e0b !important; }

.memory-icon { background: transparent !important; }

.stat-content h3, .stat-dual-info h3 {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    white-space: nowrap !important; /* 强制禁止纵览 */
    overflow: visible;
}

.stat-dual-info {
    min-width: 80px;
    display: flex;
    flex-direction: column;
}

.stat-card-dual {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0.75rem !important; /* 深度缩小内边距 */
    gap: 0.5rem !important;
}

.stat-card-dual .stat-icon {
    width: 32px !important;
    height: 32px !important;
}

.stat-card-dual .stat-icon svg {
    width: 18px !important;
    height: 18px !important;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* =============== 仪表盘组件 =============== */
/* 可点击的统计卡片 */
.stat-clickable {
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.stat-clickable:hover {
    transform: translateY(-4px) !important;
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.2) !important;
}

/* 分区标题 */
.dash-section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 2rem 0 1rem;
}

.dash-section-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.dash-section-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--accent-primary);
    border: 1px solid rgba(59, 130, 246, 0.2);
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

/* 快速操作卡片（现代横向布局） */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.action-btn {
    padding: 1.1rem 1.25rem;
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    text-align: left;
    transition: all 0.3s ease;
    border-radius: 16px;
}

.action-btn-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.action-btn-icon svg {
    width: 22px;
    height: 22px;
    color: white;
}

.action-btn-text {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.action-btn-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.action-btn-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    background: rgba(255, 255, 255, 0.03);
}

/* =============== 用户网格 =============== */
.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.user-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.user-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.user-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.user-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.user-actions {
    display: flex;
    gap: 0.5rem;
}

.user-actions button {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.user-actions button svg {
    width: 16px;
    height: 16px;
}

.btn-edit {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
}

.btn-edit:hover {
    background: rgba(59, 130, 246, 0.2);
}

.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-error);
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.2);
}

.user-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.user-info-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

.user-info-label {
    color: var(--text-secondary);
}

.user-info-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* =============== 数据查看 =============== */
.data-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.data-stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.25rem;
}

.data-stat-card h4 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.data-stat-card .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.data-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
}

/* .playlist-item styles removed as they are unused */

/* .playlist-name / .playlist-count 已统一移至下方的歌单卡片区块 */


/* .config-form 已移除（HTML class 已改为 config-panels-layout） */

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.08);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

/* btn-secondary removed from here as it is now defined globally at the top */

/* =============== 现代化配置面板系统 =============== */
.config-panels-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    align-items: start;
}

/* 卡片主体 */
.config-card {
    border-radius: 16px;
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.2s ease;
}

.config-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* 卡片标题栏 */
.config-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.02);
}

.config-card-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.config-card-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.config-card-title {
    font-size: 0.975rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 2px;
}

.config-card-desc {
    font-size: 0.775rem;
    color: var(--text-secondary);
    margin: 0;
}

/* 卡片内容区 */
.config-card-body {
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

/* 字段 */
.config-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.config-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.01em;
}

.config-input {
    font-size: 0.9rem !important;
    padding: 0.65rem 0.9rem !important;
    border-radius: 10px !important;
}

.config-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.8;
    margin-top: 2px;
}

/* 两列字段行 */
.config-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* 输入 + 按钮组合行 */
.config-input-group {
    display: flex;
    gap: 0.6rem;
}

.config-input-group .form-input {
    flex: 1;
    min-width: 0;
}

.config-inline-btn {
    padding: 0.55rem 0.85rem !important;
    font-size: 0.8rem !important;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 5px;
    flex-shrink: 0;
}

/* 分隔线 */
.config-divider {
    height: 1px;
    background: var(--glass-border);
    opacity: 0.6;
    margin: 0.15rem 0;
}

/* Toggle 开关行 */
.config-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.config-toggle-info {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.config-toggle-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.3;
}

.config-toggle-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Toggle Switch 组件 */
.toggle-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
}

.toggle-switch input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-track {
    width: 44px;
    height: 24px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: background 0.25s ease, border-color 0.25s ease;
    display: flex;
    align-items: center;
    padding: 2px;
}

.toggle-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transition: transform 0.25s ease, background 0.25s ease;
    flex-shrink: 0;
}

.toggle-switch input:checked+.toggle-track {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.toggle-switch input:checked+.toggle-track .toggle-thumb {
    transform: translateX(20px);
    background: white;
}

.toggle-switch:hover .toggle-track {
    border-color: rgba(255, 255, 255, 0.3);
}




/* =============== 日志查看 =============== */
.logs-content {
    padding: 1.5rem;
    max-height: 600px;
    overflow-y: auto;
}

.log-line {
    font-family: Monaco, Menlo, Consolas, "Courier New", monospace;
    font-size: 0.875rem;
    padding: 0.375rem 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.log-line:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* =============== 选择输入 =============== */
.select-input,
select.form-input,
#data-user-select,
#log-type-select {
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' fill-opacity='0.6' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 10px;
}

/* sort-select 完整定义在下方选择输入区块 */

.select-input:hover,
select.form-input:hover,
#data-user-select:hover,
#log-type-select:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.select-input:focus,
select.form-input:focus,
#data-user-select:focus,
#log-type-select:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* 选择框选项样式 */
.select-input option,
select.form-input option,
#data-user-select option,
#log-type-select option {
    background: rgb(20, 20, 35);
    color: var(--text-primary);
    padding: 0.5rem;
}

.select-input option:checked,
select.form-input option:checked {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

/* =============== 自定义用户选择器 =============== */
.custom-user-selector {
    position: relative;
    min-width: 180px;
    user-select: none;
}

.selector-trigger {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-primary);
}

.selector-trigger:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.selector-icon {
    width: 18px;
    height: 18px;
    color: var(--accent-primary);
}

.chevron-icon {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
    margin-left: auto;
    transition: transform 0.3s ease;
}

.custom-user-selector.open .chevron-icon {
    transform: rotate(180deg);
}

.selected-username {
    font-size: 0.95rem;
    font-weight: 500;
}

.selector-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    z-index: 100;
    overflow: hidden;
    animation: dropdownFade 0.2s ease-out;
}

@keyframes dropdownFade {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    padding-left: 1.25rem;
}

.dropdown-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    font-weight: 600;
}

.dropdown-avatar {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: white;
}

/* =============== 用户选择网格 =============== */
.user-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

.user-select-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.user-select-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.user-select-card .avatar {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: white;
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}

.user-select-card .name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.user-select-card .role {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

/* 加载动画 */
.content-loading {
    opacity: 0.6;
    filter: blur(1px);
    pointer-events: none;
    transition: all 0.3s ease;
    position: relative;
    min-height: 100px;
}

.content-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    z-index: 10;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

.fade-out {
    animation: fadeOut 0.3s ease-out forwards;
}

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

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

/* 骨架屏效果 */
.skeleton {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.05) 25%, 
        rgba(255, 255, 255, 0.1) 50%, 
        rgba(255, 255, 255, 0.05) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

@keyframes skeleton-loading {
    from { background-position: 200% 0; }
    to { background-position: -200% 0; }
}

/* =============== 模态框 =============== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    width: 500px;
    max-width: 90%;
    padding: 2rem;
    animation: fadeInUp 0.3s ease-out;
}

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

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-header .modal-close {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-header .modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1rem;
}

.modal-footer .btn-primary,
.modal-footer .btn-secondary {
    width: auto;
    min-width: 110px;
    padding: 0.875rem 1.5rem !important;
    /* Force consistency regardless of mobile media queries */
    font-size: 0.95rem;
}

/* =============== 动画 =============== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =============== 响应式（完整版见文件底部） =============== */

/* 优化 view-header 按钮样式 */
.view-header button {
    padding: 0.625rem 1.25rem !important;
    font-size: 0.875rem !important;
}

.view-header button svg {
    width: 16px !important;
    height: 16px !important;
}

/* 改进的响应式设计 */

/* =============== WebDAV 同步 =============== */
.webdav-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sync-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.action-card {
    padding: 1.5rem 1rem;
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    text-align: center;
    transition: all 0.3s ease;
    border-radius: 16px;
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    background: rgba(255, 255, 255, 0.02);
}

/* 通用颜色图标变体 - 移除背景，仅保留颜色 */
.icon-emerald {
    color: var(--accent-success) !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.icon-blue {
    color: var(--accent-primary) !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.icon-amber {
    color: var(--accent-warning) !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.icon-purple {
    color: var(--accent-secondary) !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

.icon-red {
    color: var(--accent-error) !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

/* 彩色图标背景 - WebDAV 卡片专用 (当前设置为无背景模式) */
.action-card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
    border: none;
}

.action-card-icon svg {
    width: 32px; /* 稍微放大图标 */
    height: 32px;
    color: inherit;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.1));
}

.action-card:hover .action-card-icon {
    transform: scale(1.2); /* 悬停时图标放大 */
    filter: drop-shadow(0 0 12px currentcolor); /* 发光效果 */
}

/* WebDAV 分组标签 */
.webdav-group-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.4rem 0;
    margin-bottom: 0.25rem;
}

/* 同步状态区域标题 */
.sync-section-hd {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.sync-section-hd h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

/* 空状态提示 */

/* 进度条 */
.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.progress-track {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* .users-table-header override removed to use unified style below */

.border-emerald {
    border: 1px solid rgba(16, 185, 129, 0.3) !important;
}

.border-emerald:hover {
    border-color: var(--accent-success) !important;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2) !important;
}

.border-amber {
    border: 1px solid rgba(245, 158, 11, 0.3) !important;
}

.border-amber:hover {
    border-color: var(--accent-warning) !important;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.2) !important;
}


.action-card svg {
    width: 48px;
    height: 48px;
    color: var(--accent-primary);
}

.action-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.action-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.sync-status-section,
.sync-logs-section {
    padding: 1.5rem;
}

.sync-status-section h3,
.sync-logs-section h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

.logs-header h3 {
    margin: 0;
}

.sync-logs-list {
    max-height: 400px;
    overflow-y: auto;
}

.sync-log-item {
    padding: 0.75rem;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sync-log-item:last-child {
    border-bottom: none;
}

.log-info {
    flex: 1;
}

.log-type {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 0.5rem;
}

.log-type-upload {
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-primary);
}

.log-type-download {
    background: rgba(139, 92, 246, 0.2);
    color: var(--accent-secondary);
}

.log-type-backup {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-success);
}

.log-type-restore {
    background: rgba(245, 158, 11, 0.2);
    color: var(--accent-warning);
}

.log-file {
    font-family: monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.log-status {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.log-status-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-success);
}

.log-status-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-error);
}

.log-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =============== 文件管理器 =============== */
.file-manager {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.file-toolbar {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.file-breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.file-breadcrumb a:hover {
    color: var(--accent-primary);
}

.file-breadcrumb a:not(:last-child)::after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--text-muted);
}

.file-toolbar-actions {
    display: flex;
    gap: 0.5rem;
}

.file-list {
    padding: 0;
    min-height: 400px;
}

.file-list-header {
    display: grid;
    grid-template-columns: 2fr 120px 150px 200px;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.file-item {
    display: grid;
    grid-template-columns: 2fr 120px 150px 200px;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    align-items: center;
    transition: background 0.3s ease;
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.02);
}

.file-item:last-child {
    border-bottom: none;
}

.file-name {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
}

.file-name:hover {
    color: var(--accent-primary);
}

.file-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.file-size {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.file-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.file-item-actions {
    display: flex;
    gap: 0.5rem;
}

.file-item-actions button {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-item-actions button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

/* 文件编辑器模态框 */
.file-editor-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.file-editor-content {
    width: 90%;
    max-width: 900px;
    height: 80vh;
    display: flex;
    flex-direction: column;
}

.file-editor-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-editor-body {
    flex: 1;
    padding: 1.5rem;
    overflow: auto;
}

.file-editor-textarea {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 1rem;
    color: var(--text-primary);
    font-family: Monaco, Menlo, 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    resize: none;
}

.file-editor-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* 响应式 - 文件管理器 */
@media (max-width: 768px) {
    .sync-actions-grid {
        grid-template-columns: 1fr;
    }

    .file-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .file-toolbar-actions {
        justify-content: space-between;
    }

    .file-list-header,
    .file-item {
        grid-template-columns: 1fr;
    }

    .file-col-size,
    .file-col-date {
        display: none;
    }

    .file-size,
    .file-date {
        display: none;
    }

    .file-item-actions {
        justify-content: flex-start;
    }
}

/* =============== 数据查看 - 歌单卡片 =============== */
.playlists-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.playlists-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.playlists-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.playlist-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.playlist-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.playlist-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 1rem;
}

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

.playlist-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.playlist-meta {
    display: flex;
    justify-content: space-between;
    width: 100%;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-width: 0;
}

.playlist-id {
    font-family: monospace;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.playlist-count {
    color: var(--accent-primary);
    font-weight: 500;
    flex-shrink: 0;
    white-space: nowrap;
}

.playlist-card-actions {
    display: flex;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.btn-view,
.btn-delete-playlist {
    flex: 1;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-view {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-primary);
}

.btn-view:hover {
    background: rgba(59, 130, 246, 0.25);
}

.btn-delete-playlist {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-error);
}

.btn-delete-playlist:hover {
    background: rgba(239, 68, 68, 0.25);
}

.btn-view svg,
.btn-delete-playlist svg {
    width: 16px;
    height: 16px;
}

/* =============== 歌单详情 =============== */
.playlist-detail-header {
    margin-bottom: 1.5rem;
}

.btn-back {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.btn-back:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

.btn-back svg {
    width: 16px;
    height: 16px;
}

.playlist-detail-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.playlist-detail-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* =============== 歌曲表格 =============== */
/* songs-table 相关样式已统一移至下方的「歌曲列表 UI 美化」区块 */

/* =============== 可点击的统计卡片 =============== */
.data-stat-card.clickable {
    cursor: pointer;
    transition: all 0.3s ease;
}

.data-stat-card.clickable:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.data-stat-card.clickable:active {
    transform: translateY(0);
}

/* =============== 歌单标题编辑 =============== */
.playlist-title-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.playlist-title-row h3 {
    margin: 0;
}

.btn-edit-name {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-edit-name:hover {
    background: rgba(59, 130, 246, 0.2);
    transform: scale(1.05);
}

.btn-edit-name svg {
    width: 16px;
    height: 16px;
}

/* =============== 批量操作 =============== */
.batch-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    gap: 1rem;
    flex-wrap: wrap;
}

.batch-select-btns {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-batch {
    padding: 0.5rem 0.875rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-batch:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

.btn-batch-delete {
    padding: 0.5rem 1.25rem;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    color: var(--accent-error);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-batch-delete:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.25);
    border-color: var(--accent-error);
}

.btn-batch-delete:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-batch-delete svg {
    width: 16px;
    height: 16px;
}

/* =============== 歌曲复选框列 =============== */
.song-col-checkbox {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 自定义 checkbox 样式（与用户管理统一风格） */
.song-col-checkbox input[type="checkbox"],
#select-all-checkbox {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--glass-border);
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.song-col-checkbox input[type="checkbox"]:checked,
#select-all-checkbox:checked {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-color: transparent;
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.4);
}

.song-col-checkbox input[type="checkbox"]:checked::after,
#select-all-checkbox:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1px;
    width: 4px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.song-col-checkbox input[type="checkbox"]:indeterminate,
#select-all-checkbox:indeterminate {
    background: rgba(59, 130, 246, 0.4);
    border-color: var(--accent-primary);
}

.song-col-checkbox input[type="checkbox"]:indeterminate::after,
#select-all-checkbox:indeterminate::after {
    content: '';
    position: absolute;
    left: 3px;
    top: 6px;
    width: 8px;
    height: 2px;
    background: white;
    border-radius: 1px;
}

.song-col-checkbox input[type="checkbox"]:hover,
#select-all-checkbox:hover {
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* 歌曲表格列布局统一由下方「歌曲列表 UI 美化」区块管理 */

/* =============== 搜索排序栏 =============== */
.search-sort-bar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
}

.search-box {
    flex: 1;
    position: relative;
    max-width: 400px;
    min-width: 250px;
    transition: all 0.3s ease;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-box svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    pointer-events: none;
}

.sort-select {
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' fill-opacity='0.6' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 10px;
    min-width: 150px;
}

.sort-select:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.sort-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

/* 文本截断已统一 */

/* 响应式调整 - 搜索排序栏 */
@media (max-width: 768px) {
    .search-sort-bar {
        flex-direction: column;
        gap: 0.75rem;
    }

    .search-box {
        max-width: 100%;
    }

    .sort-select {
        width: 100%;
    }

    .search-sort-bar {
        flex-direction: column;
        gap: 0.75rem;
    }

    .search-box {
        max-width: 100%;
    }

    .sort-select {
        width: 100%;
    }
}

/* =============== 用户管理表格样式 =============== */


.header-main-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 1;
}

.header-side-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 用户列表容器美化 */
#view-users .users-list-wrapper {
    background: transparent;
    border: none;
    box-shadow: none;
    overflow: visible;
}

.users-table-header {
    display: grid;
    grid-template-columns: 80px 2fr 1.5fr 140px 100px;
    gap: 1.5rem;
    padding: 1rem 1.5rem;
    margin: 0 1rem 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.user-row {
    display: grid;
    grid-template-columns: 80px 2fr 1.5fr 140px 100px;
    gap: 1.5rem;
    padding: 1rem 1.5rem;
    margin: 0 1rem 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    align-items: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.user-row:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.2);
}

/* 自定义复选框样式 */
.col-checkbox {
    display: flex;
    justify-content: center;
    align-items: center;
}

#view-users input[type="checkbox"] {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--glass-border);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#view-users input[type="checkbox"]:checked {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-color: transparent;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
}

#view-users input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

#view-users input[type="checkbox"]:hover {
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* 状态徽章 */
.status-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.status-badge.active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-badge.active::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent-success);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-success);
    animation: pulse-dot-active 2s infinite;
}

@keyframes pulse-dot-active {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.5);
        opacity: 0.6;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* 密码列样式 */
.col-password {
    font-family: inherit;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 密码掩码样式 */
.password-text {
    min-width: 60px;
    font-family: 'JetBrains Mono', Monaco, monospace;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

/* 图标按钮样式 */
.btn-icon {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
    transform: translateY(-1px);
}

/* 批量删除按钮样式已在 index.html 中定义为 btn-danger，这里确保样式存在 */
.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* =============== 模态框底部按钮布局修复 =============== */

/* modal-footer buttons now globally defined above */

/* =============== 修复输入框自动填充样式 =============== */
/* 强制覆盖浏览器自动填充的白色背景 */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 1000px #1a1f3a inset !important;
    /* 增加阴影大小以确保覆盖 */
    -webkit-text-fill-color: #e2e8f0 !important;
    transition: background-color 5000s ease-in-out 0s;
    caret-color: #e2e8f0;
    /* 确保光标颜色可见 */
}

/* Input focus effect consolidated */
.form-input:focus,
.login-box input:focus {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* =============== 用户列表布局修复 =============== */

/* 定义列表容器为垂直排列，而不是网格卡片 */
.users-table-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* 确保每一行占满宽度 */
/* .user-row consolidated above in '用户管理表格样式' section */

/* 移动端适配用户列表 */
@media (max-width: 768px) {
    /* Removed hiding styles to allow card view to show all info */
}

/* =============== 修复用户名列布局 =============== */
.col-name {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    /* 头像和文字之间的间距 */
    overflow: hidden;
    /* 防止文字溢出 */
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
    /* 防止头像被压缩 */
}

/* 修复操作列按钮样式 */
.col-actions .btn-delete {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-error);
    transition: all 0.2s;
}

.col-actions .btn-delete:hover {
    background: rgba(239, 68, 68, 0.2);
}

.col-actions .btn-delete svg {
    width: 16px;
    height: 16px;
}

/* =============== 快照管理 =============== */
.snapshots-container {
    border-radius: 16px;
    overflow: hidden;
}

.snapshots-table-header {
    display: grid;
    grid-template-columns: 200px 1fr 100px 320px;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--glass-border);
    font-weight: 600;
    color: var(--text-secondary);
}

.snapshot-row {
    display: grid;
    grid-template-columns: 200px 1fr 100px 320px;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    align-items: center;
    transition: background 0.3s ease;
}

.snapshot-row:hover {
    background: rgba(255, 255, 255, 0.03);
}

.snapshot-row:last-child {
    border-bottom: none;
}

.col-id {
    font-family: monospace;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.snapshot-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-download,
.btn-delete,
.btn-restore {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: none;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;

}

.btn-download {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-primary);
}

.btn-download:hover {
    background: rgba(59, 130, 246, 0.2);
}

.btn-restore {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-warning);
}

.btn-restore:hover {
    background: rgba(245, 158, 11, 0.2);
}

@media (max-width: 768px) {

    .snapshots-table-header,
    .snapshot-row {
        grid-template-columns: 1fr 120px;
        gap: 0.5rem;
    }

    .col-size {
        display: none;
    }
}

/* =============== 移动端快照列表适配 =============== */
@media (max-width: 768px) {

    /* 隐藏表头，改为卡片式布局 */
    .snapshots-table-header {
        display: none !important;
    }

    /* 快照行改为垂直布局 */
    .snapshot-row {
        display: flex !important;
        flex-direction: column;
        align-items: stretch !important;
        gap: 0.75rem;
        padding: 1rem !important;
        height: auto !important;
    }

    /* 时间显示优化 */
    .col-time {
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-primary);
        text-align: left;
    }

    /* 快照ID显示优化 */
    .col-id {
        display: block !important;
        font-family: monospace;
        font-size: 0.85rem;
        color: var(--text-secondary);
        word-break: break-all;
        white-space: normal;
        margin-top: -0.25rem;
    }

    /* 操作按钮区域：使用网格布局，一行三个按钮 */
    .snapshot-actions {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
        width: 100%;
    }

    /* 按钮样式调整 */
    .snapshot-actions button,
    .snapshot-actions .btn-delete {
        width: 100%;
        justify-content: center;
        padding: 0.6rem 0.2rem !important;
        font-size: 0.8rem !important;
        /* 如果希望图标和文字垂直排列（图标在上），取消下面这行的注释 */
        /* flex-direction: column; gap: 0.25rem !important; */
    }

    /* 确保删除按钮显示出来 */
    .snapshot-actions .btn-delete {
        display: flex !important;
    }
}

/* =============== 歌曲列表 UI 美化 =============== */

/* 调整歌曲表格的列宽 */
/* 基本 grid 布局 - 适配不同列数 */
/* 4 列布局 (Index, Name, Artist, Actions/Source/Playlist) */
.songs-table-header,
.song-row {
    display: grid;
    grid-template-columns: 50px minmax(200px, 2.5fr) minmax(120px, 1.2fr) 100px;
    gap: 1rem;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.2s ease;
}

/* 5 列布局 (Index, Name, Artist, Source/Playlist, Actions) */
.songs-table-header:has(.song-col-source),
.song-row:has(.song-col-source) {
    grid-template-columns: 50px minmax(200px, 2.2fr) minmax(100px, 1fr) 100px 100px;
}

/* 带复选框的布局 (Checkbox + 4/5列) */
.songs-table-header.with-checkbox,
.song-row.with-checkbox {
    /* 假设是 checkbox + 4 列 */
    grid-template-columns: 40px 50px minmax(200px, 2.5fr) minmax(120px, 1.2fr) 100px;
}

/* 特殊：查看所有歌曲时的 4 列布局 (包含所属列表) */
.songs-table-header:has(.song-col-playlist),
.song-row:has(.song-col-playlist) {
    grid-template-columns: 50px minmax(160px, 2fr) minmax(100px, 1.2fr) 150px;
}

.song-row:hover {
    background: rgba(255, 255, 255, 0.03);
}

.song-col-index {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
}

.song-col-artist,
.song-col-album,
.song-col-playlist,
.song-col-source {
    color: var(--text-secondary);
    font-size: 0.875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-col-actions {
    display: flex;
    justify-content: center;
}

.btn-delete-song {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-error);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-delete-song:hover {
    background: rgba(239, 68, 68, 0.2);
}

.btn-delete-song svg {
    width: 16px;
    height: 16px;
}

.song-col-name {
    display: flex;
    align-items: center;
    gap: 1rem;
    overflow: hidden;
}

/* 封面图样式 */
.song-cover {
    width: 48px;
    height: 48px;
    border-radius: 6px;
    background-color: rgba(255, 255, 255, 0.05);
    /* 占位背景色 */
    flex-shrink: 0;
    object-fit: cover;
    transition: opacity 0.3s ease;
}

.song-cover.loading {
    opacity: 0.5;
}

/* 歌曲信息容器 */
.song-info-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow: hidden;
}

.song-title-text {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.song-meta-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
}

/* 歌手名（仅手机端在 info-wrapper 内显示，桌面端靠独立 song-col-artist 列） */
.song-singer-mobile {
    display: none;
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 标签通用样式 */
.tag {
    font-size: 0.7rem;
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    font-weight: 500;
    line-height: normal;
    display: inline-block;
    border: 1px solid transparent;
}

/* 音质标签 */
.tag-quality {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border-color: rgba(255, 255, 255, 0.1);
}

.tag-quality.high {
    /* 320k */
    color: var(--accent-success);
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

.tag-quality.lossless {
    /* flac, flac24bit */
    color: var(--accent-warning);
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
}

.tag-quality.hr {
    /* flac24bit / Hi-Res */
    color: #f43f5e;
    /* Rose */
    background: rgba(244, 63, 94, 0.1);
    border-color: rgba(244, 63, 94, 0.2);
}

/* 来源标签 */
.tag-source {
    text-transform: uppercase;
}

.tag-source.wy {
    /* 网易云 */
    color: #ef4444;
    /* Red */
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
}

.tag-source.kw {
    /* 酷我 */
    color: #eab308;
    /* Yellow */
    background: rgba(234, 179, 8, 0.1);
    border-color: rgba(234, 179, 8, 0.2);
}

.tag-source.kg {
    /* 酷狗 */
    color: #3b82f6;
    /* Blue */
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
}

.tag-source.tx {
    /* QQ音乐 */
    color: #22c55e;
    /* Green */
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.2);
}

.tag-source.mg {
    /* 咪咕 */
    color: #ec4899;
    /* Pink */
    background: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.2);
}

.tag-source.local {
    /* 本地 */
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.1);
}

/* 时长标签 */
.tag-interval {
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', Monaco, monospace;
    font-size: 0.75rem;
    opacity: 0.6;
    margin-left: 0.25rem;
}

/* Responsive Top Bar Actions - Progressively hide text to save space */
/* ================= 响应式布局增强 (Breakpoints) ================= */

/* --- Tablet (1200px) --- */
@media (max-width: 1200px) {
    .top-bar-actions {
        gap: 0.5rem !important;
    }

    .top-bar-actions a span {
        display: none !important;
    }

    .top-bar-actions a svg {
        margin: 0 !important;
    }

    .top-bar-actions a {
        padding: 0.5rem !important;
        width: 38px;
        height: 38px;
        border-radius: 10px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --- Small Tablet (1024px) --- */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
    }

    .main-content {
        padding: 1rem 0.5rem 1rem 0;
    }

    .top-bar {
        padding: 1rem 1.5rem;
    }

    .top-bar h2 {
        font-size: 1.25rem;
    }

    #restart-server-btn span {
        display: none !important;
    }

    #restart-server-btn {
        padding: 0.5rem !important;
        width: 38px;
        height: 38px;
        border-radius: 10px;
    }

    .songs-table-header,
    .song-row {
        grid-template-columns: 50px 2fr 1fr 100px;
    }

    .song-col-album,
    .song-col-playlist {
        display: none;
    }
}

/* --- Mobile (768px-900px) --- */
@media (max-width: 900px) {
    #install-pwa-btn span {
        display: none !important;
    }

    #install-pwa-btn {
        padding: 0.5rem !important;
        width: 38px;
        height: 38px;
        border-radius: 10px;
        margin-right: 0.5rem !important;
    }

    #server-status {
        display: none !important;
    }

    .status-indicator {
        width: 38px;
        height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0 !important;
        border-radius: 10px;
    }
}

/* =============== 现代化仪表盘样式 (Global) =============== */
.config-actions-bar {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 1.5rem;
    padding: 1.25rem 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    margin-top: 1.5rem;
    grid-column: 1 / -1;
    box-sizing: border-box;
}

.config-actions-btns {
    display: flex;
    gap: 0.75rem;
}

.config-actions-btns .btn-primary,
.config-actions-btns .btn-secondary {
    width: auto;
    padding: 0.75rem 1.25rem;
}

.config-actions-hint {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.config-actions-hint svg {
    flex-shrink: 0;
}

.welcome-section {
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease-out;
}

.welcome-section h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.welcome-section .greeting-text {
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 实时监控网格 */
.monitor-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.monitor-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

.monitor-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-container {
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    transition: width 0.5s ease;
}

.chart-container {
    height: 100px;
    width: 100%;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
}

.chart-svg {
    width: 100%;
    height: 100%;
}

/* Stat Cards & Dual Layouts */
.stat-card-dual {
    display: flex !important;
    gap: 0.5rem !important;
    padding: 1rem !important;
}

.stat-dual-section {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.stat-dual-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
}

.stat-value-pair {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.stat-value-secondary {
    font-size: 0.8rem;
    opacity: 0.5;
}

/* WebDAV & Placeholder Styles */
.setup-guide-card {
    padding: 3rem 2rem;
    text-align: center;
    border: 1px dashed var(--glass-border);
    border-radius: 20px;
    margin: 1.5rem 0;
}

.sync-empty-tip {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    opacity: 0.6;
}

/* --- Phone & Small Screens (768px) --- */
@media screen and (max-width: 768px) {
    /* Layout Reset */
    #app {
        flex-direction: column;
        height: 100vh;
        overflow: hidden;
    }

    .main-content {
        padding: 0 1rem !important; /* 唯一真实的左右边距 */
        margin-left: 0 !important;
        width: 100% !important;
        height: 100vh;
        overflow-y: hidden;
        display: flex;
        flex-direction: column;
    }

    .top-bar {
        position: sticky;
        top: 0;
        z-index: 50;
        margin: 1rem 0; /* 仅上下外边距，左右外边距由 main-content padding 提供 */
        width: 100%;
        padding: 1.25rem 1.5rem;
        background: rgba(10, 14, 39, 0.9);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        border-radius: 16px;
    }

    .top-bar h2 {
        font-size: 1.1rem;
        margin: 0;
    }

    .mobile-header-row #console-version {
        display: inline-block !important; /* 在手机端强制显示版本号 */
        margin-left: 0.5rem;
    }

    .header-left-group {
        width: 100%;
    }

    .mobile-header-row {
        width: 100%;
        display: flex;
        align-items: center;
    }

    #mobile-menu-btn {
        margin-right: 0.75rem;
    }

    .top-bar-actions {
        width: 100%;
        gap: 0.5rem;
    }

    .content-wrapper {
        flex: 1;
        overflow-y: auto;
        padding: 0; /* 移除内边距，依靠 main-content 的 padding */
        padding-bottom: 10rem !important;
        -webkit-overflow-scrolling: touch;
    }

    /* Sidebar & Mobile Overlay */
    .sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100vh;
        margin: 0;
        z-index: 1000;
        background: rgba(18, 23, 41, 0.95);
        backdrop-filter: blur(30px);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        border-right: 1px solid var(--glass-border);
        border-radius: 0 16px 16px 0;
        transform: none;
        box-shadow: none;
    }

    .sidebar.active {
        transform: translateX(280px);
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .mobile-sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.6);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
        backdrop-filter: blur(4px);
        display: none;
    }

    .mobile-sidebar-overlay.active {
        display: block !important;
        opacity: 1;
        pointer-events: auto;
    }

    .mobile-only {
        display: flex !important;
    }

    /* Selection & View Header */
    .view-header {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 1rem !important;
        padding-bottom: 1.25rem !important;
        margin-bottom: 1.5rem !important;
    }

    .header-main-actions, .header-side-actions {
        width: 100% !important;
        display: flex !important;
        gap: 0.5rem !important;
    }

    .search-box {
        flex: 1 !important;
        min-width: 0 !important;
        max-width: none !important;
    }

    .view-header button, .custom-user-selector {
        flex: 1;
        font-size: 0.85rem !important;
    }

    /* 顶部栏图标精简 - 移除手机端隐藏 GitHub 图标的限制 */
    /* .top-bar-actions a:last-child {
        display: none !important; 
    } */

    /* 配置中心强制单列 (修复卡片大小不一) */
    .config-panels-layout {
        display: flex !important;
        flex-direction: column !important;
        gap: 1.25rem !important;
        width: 100% !important;
        padding: 0 !important; /* 确保没有额外内边距 */
    }

    .config-card {
        width: 100% !important;
        margin: 0 0 1.25rem 0 !important; /* 统一卡片间距 */
    }

    .config-field-row {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0.75rem !important;
    }

    .config-input-group {
        width: 100% !important;
    }

    /* 监控网格优化 */
    .monitor-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }

    /* 用户/数据选择卡片优化 (修复图2/4) */
    .user-selection-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)) !important;
        gap: 0.75rem !important;
        padding-top: 0.5rem !important;
    }

    .user-select-card {
        padding: 1.25rem 0.75rem !important;
    }

    .user-select-card .avatar {
        width: 48px !important;
        height: 48px !important;
        font-size: 1.2rem !important;
    }

    /* 手机端吸底配置栏 */
    .config-actions-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        margin: 0;
        padding: 1.25rem 1rem !important;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: 24px 24px 0 0;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        display: flex !important;
        flex-direction: column !important; /* 改为垂直布局 */
        gap: 1rem !important;
        z-index: 900;
        box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
    }

    .config-actions-btns {
        width: 100% !important;
        display: flex !important;
        gap: 0.75rem !important;
    }

    .config-actions-btns button {
        flex: 1 !important;
        justify-content: center !important;
        padding: 0.8rem 0.5rem !important;
        font-size: 0.95rem !important;
    }

    .config-actions-hint {
        font-size: 0.85rem !important;
        align-items: flex-start !important;
        gap: 8px;
        line-height: 1.4;
    }

    .config-actions-hint svg {
        margin-top: 2px;
    }

    /* 仪表盘统计卡片修复 (解决图2文字挤压) */
    .stats-grid {
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }

    .stat-card-dual {
        flex-direction: row !important; /* 手机端恢复左右并排样式 */
        padding: 1rem 0.75rem !important;
        gap: 0.5rem !important;
        justify-content: space-between !important;
    }

    .stat-dual-section {
        flex: 1;
        justify-content: center !important;
        gap: 0.5rem !important;
        width: auto !important;
    }

    .stat-dual-section .stat-icon {
        width: 32px !important;
        height: 32px !important;
    }

    .stat-dual-section .stat-icon svg {
        width: 18px !important;
        height: 18px !important;
    }

    .stat-dual-divider {
        display: block !important; /* 恢复分割线 */
        height: 30px !important;
        opacity: 0.1;
    }

    .stat-info h3 {
        white-space: nowrap !important;
        font-size: 0.9rem !important;
    }

    /* 用户管理卡片精修 — 紧凑横向布局 */
    .user-row {
        display: grid;
        grid-template-columns: 32px 1fr auto !important;
        grid-template-rows: auto auto !important;
        grid-template-areas:
            "check info actions"
            "check pwd  actions" !important;
        gap: 0.4rem 0.75rem !important;
        padding: 0.875rem 1rem !important;
        margin: 0 0.75rem 0.75rem !important;
        align-items: center;
        position: relative;
        overflow: hidden;
    }

    .user-row .col-checkbox {
        grid-area: check !important;
        position: static !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        align-self: center;
    }

    .user-row .col-name {
        grid-area: info !important;
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        gap: 0.6rem !important;
        margin-top: 0 !important;
    }

    .user-avatar {
        width: 36px !important;
        height: 36px !important;
        font-size: 1rem !important;
        flex-shrink: 0;
        border: none;
        box-shadow: none;
    }

    .user-row .col-password {
        grid-area: pwd !important;
        display: flex !important;
        align-items: center !important;
        justify-content: flex-start !important;
        gap: 0.5rem !important;
        background: transparent !important;
        padding: 0 !important;
        border-radius: 0 !important;
        margin: 0 !important;
        font-size: 0.8rem;
    }

    .password-text {
        font-family: 'JetBrains Mono', monospace !important;
        letter-spacing: 0.1em !important;
        font-size: 0.8rem !important;
        color: var(--text-secondary) !important;
    }

    .user-row .col-status {
        display: none !important;
    }

    .user-row .col-actions {
        grid-area: actions !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        gap: 0.4rem !important;
        border-top: none !important;
        padding-top: 0 !important;
        margin-top: 0 !important;
        width: auto !important;
        align-self: center;
    }

    .btn-delete {
        width: 36px !important;
        height: 36px !important;
        border-radius: 10px !important;
        background: rgba(239, 68, 68, 0.1) !important;
        border: 1px solid rgba(239, 68, 68, 0.2) !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 0 !important;
    }

    .btn-icon {
        width: 30px !important;
        height: 30px !important;
        border-radius: 8px !important;
    }

    /* Table Transformation to Cards */
    .users-table-header, .snapshots-table-header, .songs-table-header {
        display: none !important;
    }

    .batch-actions {
        flex-direction: row !important;
        align-items: center !important;
        padding: 0.6rem !important;
        gap: 0.4rem !important;
        background: rgba(255, 255, 255, 0.03);
        border-radius: 12px;
        margin-bottom: 1rem;
        overflow: hidden;
    }

    .batch-select-btns {
        display: flex !important;
        flex: 3 !important;
        gap: 4px !important;
    }

    .batch-select-btns button {
        flex: 1;
        padding: 0.5rem 2px !important;
        font-size: 0.75rem !important;
        white-space: nowrap;
        border-radius: 6px !important;
    }

    .btn-batch-delete {
        flex: 1.5 !important;
        justify-content: center;
        padding: 0.5rem 4px !important;
        font-size: 0.75rem !important;
        background: rgba(239, 68, 68, 0.15) !important;
        border-radius: 6px !important;
        margin: 0 !important;
    }

    /* ===== 手机端歌曲卡片布局 ===== */
    .song-row {
        display: flex;
        flex-direction: row !important;
        align-items: stretch !important;
        gap: 0 !important;
        padding: 0.85rem 0.75rem !important;
        background: rgba(255, 255, 255, 0.02);
        border-radius: 12px;
        margin-bottom: 0.75rem;
        border: 1px solid var(--glass-border);
        position: static;
        /* 桌面端的 grid 在这里全部重置 */
        grid-template-columns: unset !important;
        grid-template-areas: unset !important;
    }

    /* checkbox 区域：左侧竖向居中 */
    .song-col-checkbox {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        flex-shrink: 0;
        width: 28px;
        margin-right: 8px;
    }

    /* 歌曲名列：内部 flex(cover + info)，占主体空间 */
    .song-col-name {
        flex: 1 !important;
        display: flex !important;
        align-items: center !important;
        gap: 0.6rem !important;
        overflow: hidden;
        padding: 0 !important;
        min-width: 0;
    }

    /* 封面图：正常流，不再绝对定位 */
    .song-col-name .song-cover {
        position: static !important;
        transform: none !important;
        width: 44px !important;
        height: 44px !important;
        flex-shrink: 0;
        border-radius: 8px;
    }

    /* 歌曲信息容器：flex 列，占剩余宽度 */
    .song-col-name .song-info-wrapper {
        padding-left: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 3px !important;
        overflow: hidden;
        flex: 1;
        min-width: 0;
    }

    /* 歌手列：藏起来，歌手名由 song-singer-mobile 在 info-wrapper 内显示 */
    .song-col-artist {
        display: none !important;
    }

    /* 歌手名：手机端改为在 info-wrapper 内显示 */
    .song-singer-mobile {
        display: block;
    }

    /* 删除按钮列：右侧竖向居中 */
    .song-col-actions {
        display: flex !important;
        align-items: center !important;
        justify-content: flex-end !important;
        flex-shrink: 0;
        margin-left: 8px;
        position: static !important;
    }

    .song-col-index {
        display: none !important;
    }

    /* 删除按钮本体尺寸优化 */
    .song-col-actions .btn-delete-song {
        width: 34px !important;
        height: 34px !important;
        padding: 0 !important;
        border-radius: 8px !important;
    }

    /* 统一底部留白 */
    .content-wrapper {
        padding-bottom: 10rem !important;
    }
}