/* ================================================================
   阿普教育管理系统 - 全局样式（日间/夜间双主题）
   现代风格设计 - 圆角、柔和阴影、精致过渡
   ================================================================ */

:root {
    --bg: #f5f7fa;
    --bg-gradient: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    --card-bg: #ffffff;
    --card-border: #e5e9f0;
    --text: #1a2332;
    --text-2: #5a6678;
    --text-3: #8b95a7;
    --border: #e5e9f0;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-soft: #eef2ff;
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-soft: #fef2f2;
    --success: #10b981;
    --success-soft: #ecfdf5;
    --warning: #f59e0b;
    --warning-soft: #fffbeb;
    --sidebar-bg: #ffffff;
    --sidebar-hover: #f1f5f9;
    --header-bg: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
    --header-text: #ffffff;
    --input-bg: #ffffff;
    --table-head: #f8fafc;
    --row-hover: #f8fafc;
    --row-selected: #eef2ff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --scrollbar: #cbd5e1;
}

[data-theme="dark"] {
    --bg: #0f172a;
    --bg-gradient: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    --card-bg: #1e293b;
    --card-border: #334155;
    --text: #f1f5f9;
    --text-2: #cbd5e1;
    --text-3: #94a3b8;
    --border: #334155;
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-soft: #1e3a5f;
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --danger: #f87171;
    --danger-hover: #ef4444;
    --danger-soft: #450a0a;
    --success: #34d399;
    --success-soft: #064e3b;
    --warning: #fbbf24;
    --warning-soft: #451a03;
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --header-bg: linear-gradient(135deg, #1e3a8a 0%, #172554 100%);
    --header-text: #ffffff;
    --input-bg: #0f172a;
    --table-head: #1e3a5f;
    --row-hover: #334155;
    --row-selected: #1e3a5f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
    --scrollbar: #475569;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg);
    font-size: 14px;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.5;
}

* { box-sizing: border-box; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ============ 登录页 ============ */

.login-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-gradient);
    position: relative;
    overflow: hidden;
}

.login-deco {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.login-deco-a {
    width: 520px;
    height: 520px;
    top: -180px;
    right: -140px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
}

.login-deco-b {
    width: 440px;
    height: 440px;
    bottom: -180px;
    left: -120px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
}

.login-card {
    width: 420px;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 48px 40px 40px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--card-border);
    position: relative;
    z-index: 1;
    text-align: center;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: var(--radius-lg);
    background: transparent;
    object-fit: contain;
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.3);
}

.login-brand {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 1px;
}

.login-sub {
    font-size: 11px;
    color: var(--text-3);
    margin: 8px 0 32px;
    letter-spacing: 3px;
}

.login-version {
    margin-top: 28px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-3);
    letter-spacing: 0.5px;
}

.login-error {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 13px;
    margin-bottom: 20px;
}

.login-form { display: flex; flex-direction: column; gap: 16px; }

.login-input {
    height: 48px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0 16px;
    font-size: 14px;
    outline: none;
    background: var(--input-bg);
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.login-input::placeholder { color: var(--text-3); }

.login-input:focus {
    border-color: var(--primary);
    background: var(--input-bg);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.login-btn {
    height: 48px;
    margin-top: 8px;
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 6px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.login-btn:hover { 
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}
.login-btn:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3); }

/* ============ 工具栏 ============ */

.toolbar-spacer { flex: 1; }

/* ============ 按钮 ============ */

.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-outline-primary { color: var(--primary); border-color: var(--primary); background: transparent; }
.btn-outline-primary:hover { background: var(--primary-soft); }

/* ============ 表单 ============ */

.form-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px 20px;
    align-items: center;
}

.form-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.form-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.form-grid.cols-1 { grid-template-columns: 1fr; }

.form-item { display: flex; align-items: center; gap: 10px; }

.form-label {
    font-size: 13px;
    color: var(--text-2);
    white-space: nowrap;
}

.form-input, .form-select, .form-textarea {
    flex: 1;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 12px;
    font-size: 14px;
    outline: none;
    background: var(--input-bg);
    color: var(--text);
    min-width: 0;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.12);
}

.form-textarea { height: auto; padding: 9px 12px; resize: vertical; }

.form-input[readonly], .form-input[disabled], .form-select[disabled], .form-textarea[disabled] {
    background: var(--row-hover);
    color: var(--text-3);
}

select.form-select option { background: var(--card-bg); color: var(--text); }

/* ============ 上课时间设置（报名） ============ */

.form-group-box {
    background: var(--row-hover);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 14px 16px;
}

.week-time-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.week-time-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.week-day-label {
    width: 60px;
    font-size: 13px;
    color: var(--text-2);
    flex-shrink: 0;
}

.week-check {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.5);
}

[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(1); }

/* ============ 分组多选（年级：小学/初中/高中/其它，每行全选+全部全选）============ */

.form-multiselect .ms-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 14px;
    padding: 3px 0;
    border-bottom: 1px dashed var(--card-border, #e5e7eb);
}

.form-multiselect .ms-row:last-child { border-bottom: none; }

.form-multiselect .ms-all-row {
    border-bottom: 1px solid var(--card-border, #e5e7eb);
    margin-bottom: 2px;
    padding-bottom: 5px;
}

.form-multiselect .ms-group-label {
    min-width: 42px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2, #6b7280);
    flex-shrink: 0;
}

.form-multiselect .ms-check {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-weight: normal;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
}

.form-multiselect .ms-check input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--primary);
    cursor: pointer;
    margin: 0;
}

/* ============ 搜索区 ============ */

.search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 14px 18px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    margin-bottom: 14px;
    box-shadow: var(--shadow);
}

.search-item { display: flex; align-items: center; gap: 8px; }

.search-label { font-size: 13px; color: var(--text-2); white-space: nowrap; }

/* ============ 可搜索下拉 SearchableSelect ============ */

.searchable-select { position: relative; }

.ss-input-wrap { position: relative; display: flex; align-items: center; }

.ss-input-wrap .form-input { width: 100%; padding-right: 26px; }

.ss-clear {
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
    cursor: pointer; color: var(--text-3); font-size: 16px; line-height: 1;
}

.ss-clear:hover { color: var(--text); }

.ss-list {
    position: absolute; left: 0; right: 0; top: calc(100% + 2px); z-index: 3000;
    max-height: 240px; overflow-y: auto;
    background: var(--card-bg); border: 1px solid var(--card-border);
    border-radius: 8px; box-shadow: 0 6px 20px rgba(0,0,0,.18); padding: 4px;
}

.ss-item {
    padding: 7px 10px; border-radius: 6px; cursor: pointer;
    font-size: 13px; color: var(--text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.ss-item:hover { background: var(--row-hover); }

.ss-item.ss-selected { background: var(--primary); color: #fff; }

.ss-item.ss-empty { color: var(--text-3); cursor: default; text-align: center; }

.ss-item.ss-empty:hover { background: transparent; }

/* ============ 表格 ============ */

.table-wrap {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: auto;
    box-shadow: var(--shadow);
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

table.data-table th {
    background: var(--table-head);
    color: var(--text-2);
    font-weight: 600;
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 1;
}

table.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    color: var(--text);
}

table.data-table tbody tr { transition: background-color 0.12s; cursor: pointer; }
table.data-table tbody tr:hover { background: var(--row-hover); }
table.data-table tbody tr.selected { background: var(--row-selected); }

/* ============ 分页 ============ */

.pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-2);
}

.pagination button {
    min-width: 30px;
    height: 30px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text);
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.15s;
}

.pagination button:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.pagination button.active {
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: #fff;
    border-color: transparent;
}
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============ 弹窗（Dialog） ============ */

.dialog-mask {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.15s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.dialog {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    max-height: 92vh;
    animation: slideUp 0.2s ease;
}

@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 22px;
    border-bottom: 1px solid var(--border);
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.dialog-close {
    background: none;
    border: none;
    font-size: 22px;
    color: var(--text-3);
    cursor: pointer;
    line-height: 1;
    transition: color 0.15s;
}

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

.dialog-body { padding: 20px 22px; overflow-y: auto; }

.dialog-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 14px 22px;
    border-top: 1px solid var(--border);
}

/* ============ 状态标签 ============ */

.badge {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}

.badge-green { background: var(--primary-soft); color: var(--primary); }
.badge-gray { background: var(--row-hover); color: var(--text-2); }
.badge-red { background: var(--danger-soft); color: var(--danger); }
.badge-blue { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.badge-yellow { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }

/* ============ 消息提示 ============ */

.msg-error {
    background: var(--danger-soft);
    border: 1px solid var(--danger-soft);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 12px;
}

.msg-success {
    background: var(--primary-soft);
    border: 1px solid var(--primary-soft);
    color: var(--primary);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 12px;
}

/* ============ 升级提示横幅 ============ */

.update-banner {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--primary-soft);
    border: 1px solid var(--primary-soft);
    color: var(--primary);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 12px;
}

.update-banner-text {
    flex: 1;
}

/* ============ 空状态 ============ */

.empty-state {
    text-align: center;
    color: var(--text-3);
    padding: 44px 0;
    font-size: 14px;
}

/* ============ 讲师卡片（上课点名/课程表） ============ */

.teacher-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.teacher-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s;
    box-shadow: var(--shadow);
}

.teacher-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.teacher-card.selected {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-soft), var(--shadow);
    background: var(--primary-soft);
}

.teacher-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-1);
}

.teacher-sub {
    font-size: 12px;
    color: var(--text-2);
    margin-top: 4px;
}

.teacher-sub.dim { color: var(--text-3); }

.teacher-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    background: var(--primary-soft);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 14px;
}

.teacher-header-info { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.teacher-header-name { font-weight: 700; font-size: 15px; color: var(--text-1); }

.teacher-header-sub { font-size: 13px; color: var(--text-2); }

.teacher-header-sub.dim { color: var(--text-3); }

.teacher-header-actions { display: flex; align-items: center; gap: 8px; }

/* ============ 报表页 ============ */

.report-total-row td {
    background: var(--primary-soft);
    font-weight: 600;
}

/* ============ 响应式 ============ */

@media (max-width: 1200px) {
    .form-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============ 整体布局（主框架） ============ */

.app-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--bg);
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 24px;
    flex-shrink: 0;
    background: var(--header-bg);
    color: var(--header-text);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 100;
}

.app-brand { display: flex; align-items: baseline; gap: 12px; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: 0.5px; }
.brand-sub { font-size: 11px; opacity: 0.7; letter-spacing: 2px; }

.version-badge {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 8px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    font-size: 11px;
    font-style: normal;
    letter-spacing: 0.5px;
    vertical-align: middle;
}

.app-db-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    color: #fff;
    font-size: 12px;
    cursor: help;
    transition: all 0.2s;
}
.app-db-info:hover {
    background: rgba(255, 255, 255, 0.25);
}
.db-icon { font-size: 14px; }
.db-text { font-weight: 500; max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.app-user { display: flex; align-items: center; gap: 16px; }

.theme-area {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.theme-info {
    font-size: 12px;
    color: #fff;
    white-space: nowrap;
}

.theme-info .theme-mode {
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    font-weight: 600;
}

.theme-info .theme-current {
    font-weight: 500;
    opacity: 0.9;
}

.theme-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.theme-btn:hover { 
    background: rgba(255, 255, 255, 0.25);
    transform: rotate(15deg);
}

.theme-auto-btn {
    width: 28px;
    height: 28px;
    font-size: 12px;
    opacity: 0.8;
}
.theme-auto-btn:hover {
    opacity: 1;
}

.user-name { font-size: 13px; opacity: 0.9; font-weight: 500; }

.btn-logout {
    padding: 6px 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-logout:hover { 
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.app-body { display: flex; flex: 1; overflow: hidden; }

/* ============ 侧边菜单 ============ */

.app-sidebar {
    width: 180px;
    flex-shrink: 0;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    padding: 0;
    transition: background-color 0.3s;
}

.side-menu {
    display: flex;
    flex-direction: column;
    padding: 10px 6px 16px;
}

.menu-group {
    margin-top: 2px;
    padding-bottom: 2px;
}

.menu-group-title {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    margin: 2px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: 0.3px;
    border-radius: var(--radius);
    cursor: pointer;
    user-select: none;
    transition: all 0.15s ease;
}
.menu-group-title:hover { 
    background: var(--row-hover); 
    color: var(--text); 
}

.menu-caret {
    width: 14px;
    font-size: 10px;
    text-align: center;
    display: inline-block;
    transition: transform 0.2s ease;
    opacity: 0.6;
}
.menu-group.open .menu-caret { transform: rotate(90deg); }

.menu-group-text { flex: 1; }

.menu-children {
    display: none;
    flex-direction: column;
    gap: 1px;
    margin: 2px 0 4px;
    padding-left: 8px;
    border-left: 2px solid var(--border);
    margin-left: 14px;
    padding-left: 12px;
}

.menu-group.open .menu-children {
    display: flex;
}

.menu-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--text-3);
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.menu-children .nav-link {
    padding: 8px 12px;
    font-size: 13px;
    gap: 10px;
    position: relative;
}

.menu-children .nav-link:hover .menu-dot,
.menu-children .nav-link.active .menu-dot {
    background: var(--primary);
    transform: scale(1.3);
}

.nav-link-home {
    font-weight: 600;
    background: var(--primary-gradient);
    color: #fff;
    margin-bottom: 12px;
    border: none;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}
.nav-link-home:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    margin: 1px 0;
    font-size: 13px;
    color: var(--text-2);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.15s ease;
    position: relative;
}
.nav-link:hover {
    background: var(--row-hover);
    color: var(--text);
}
.nav-link:active { transform: scale(0.98); }
.nav-link.active {
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 600;
}
.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
}

.menu-icon {
    width: 18px;
    text-align: center;
    font-size: 12px;
    opacity: 0.7;
}

/* ============ 主内容区 ============ */

.app-main {
    flex: 1;
    overflow-y: auto;
    background: var(--bg);
}

.content-wrap {
    padding: 24px 28px 48px;
    max-width: 1600px;
}

/* ============ 卡片样式 ============ */

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s;
}
.card:hover { box-shadow: var(--shadow-md); }

.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

/* ============ 统计卡片 ============ */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
}
.stat-card:hover { 
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-num {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-2);
    font-weight: 500;
}

/* ============ 工具栏 ============ */

.toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card-bg);
    color: var(--text);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
}
.btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-soft);
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.btn-success {
    background: var(--success);
    color: #fff;
    border-color: transparent;
}
.btn-success:hover {
    background: #059669;
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: transparent;
}
.btn-danger:hover {
    background: var(--danger-hover);
    color: #fff;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

/* ============ 页面标题 ============ */

.page-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ============ 标签页容器 ============ */

.tab-container {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    overflow-y: hidden;
    flex-shrink: 0;
    min-height: 40px;
}

.tab-container::-webkit-scrollbar {
    height: 3px;
}

.tab-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 13px;
    color: var(--text-2);
    background: var(--row-hover);
    border-radius: 6px 6px 0 0;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
    position: relative;
    max-width: 180px;
}

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

.tab-item.active {
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 600;
    border-bottom: 2px solid var(--primary);
}

.tab-item.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px 2px 0 0;
}

.tab-title {
    overflow: hidden;
    text-overflow: ellipsis;
}

.tab-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    font-size: 14px;
    line-height: 1;
    color: var(--text-3);
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.tab-close:hover {
    background: var(--danger);
    color: #fff;
}

.tab-item.active .tab-close {
    color: var(--primary);
}

.tab-item.active .tab-close:hover {
    background: var(--danger);
    color: #fff;
}

/* ============ 错误提示 ============ */

#blazor-error-ui {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2000;
    display: none;
    background: var(--danger-soft);
    color: var(--danger);
    padding: 12px 20px;
    font-size: 13px;
    box-shadow: var(--shadow-lg);
}
#blazor-error-ui .reload { margin: 0 12px; color: var(--primary); }
#blazor-error-ui .dismiss { float: right; cursor: pointer; }
#blazor-error-ui:not([hidden]) { display: block; }

/* ===== 富文本编辑器 ===== */
.richtext-wrap { border: 1px solid var(--border, #d1d5db); border-radius: 6px; overflow: hidden; }
.richtext-toolbar { display: flex; flex-wrap: wrap; gap: 2px; padding: 6px 8px; background: var(--bg-secondary, #f9fafb); border-bottom: 1px solid var(--border, #d1d5db); }
.richtext-toolbar button { min-width: 30px; height: 28px; padding: 0 7px; border: 1px solid transparent; border-radius: 4px; background: transparent; cursor: pointer; font-size: 13px; line-height: 26px; color: var(--text, #333); }
.richtext-toolbar button:hover { background: var(--bg-hover, #e5e7eb); border-color: var(--border, #d1d5db); }
.richtext-toolbar .sep { width: 1px; height: 20px; background: var(--border, #d1d5db); margin: 4px 4px; align-self: center; }
.richtext-editor { min-height: 220px; max-height: 480px; overflow-y: auto; padding: 12px 14px; font-size: 14px; line-height: 1.7; outline: none; background: var(--bg, #fff); color: var(--text, #333); }
.richtext-editor:empty::before { content: attr(data-placeholder); color: var(--text-muted, #9ca3af); pointer-events: none; }
.richtext-editor img { max-width: 100%; height: auto; }
.richtext-editor a { color: var(--primary, #2563eb); text-decoration: underline; }

/* ================================================================
   智能体对话页
   ================================================================ */
.agent-container { display: flex; flex-direction: column; height: calc(100vh - 168px); min-height: 420px; max-width: 960px; margin: 0 auto; padding: 12px 16px; }
.agent-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border); margin-bottom: 8px; flex-shrink: 0; }
.agent-title { font-size: 18px; font-weight: 700; color: var(--text); }
.agent-status { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.status-badge { display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.status-off { background: var(--danger-soft); color: var(--danger); }
.status-warn { background: var(--warning-soft); color: var(--warning); }
.status-ok { background: var(--success-soft); color: var(--success); }
.agent-model { color: var(--text-2); }
.agent-unavailable { display: flex; align-items: center; justify-content: center; flex: 1; color: var(--text-2); font-size: 14px; text-align: center; padding: 40px; }
.quick-prompts { padding: 16px 0; flex-shrink: 0; }
.quick-label { font-size: 13px; color: var(--text-3); margin-bottom: 8px; }
.quick-refresh { border: none; background: none; color: var(--primary); font-size: 12px; cursor: pointer; padding: 0 4px; margin-left: 6px; }
.quick-refresh:hover { text-decoration: underline; }
.quick-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.quick-btn { padding: 6px 14px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg); color: var(--text); font-size: 13px; cursor: pointer; transition: all .15s; }
.quick-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.agent-messages { flex: 1; overflow-y: auto; padding: 8px 0; display: flex; flex-direction: column; gap: 12px; }
.msg-row { display: flex; }
.msg-row.msg-user { justify-content: flex-end; }
.msg-row.msg-assistant { justify-content: flex-start; }
.msg-bubble { max-width: 80%; padding: 10px 14px; border-radius: var(--radius-lg); font-size: 14px; line-height: 1.7; word-break: break-word; }
.msg-user .msg-bubble { background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.msg-assistant .msg-bubble { background: var(--card-bg); border: 1px solid var(--border); border-bottom-left-radius: 4px; color: var(--text); }
.msg-text code { background: rgba(0,0,0,.06); padding: 1px 4px; border-radius: 3px; font-size: 13px; }
.msg-user .msg-text code { background: rgba(255,255,255,.2); }
.msg-tools { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 4px; }
.tool-tag { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 11px; background: var(--primary-soft); color: var(--primary); border: 1px solid var(--primary); opacity: .7; }
.tool-active { animation: pulse 1.2s infinite; }
@keyframes pulse { 0%,100% { opacity: .4; } 50% { opacity: 1; } }
.agent-input-area { flex-shrink: 0; padding: 8px 0; border-top: 1px solid var(--border); }
.agent-error { background: var(--danger-soft); color: var(--danger); padding: 6px 12px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 8px; }
.agent-input-row { display: flex; gap: 8px; }
.agent-input { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; background: var(--input-bg); color: var(--text); outline: none; }
.agent-input:focus { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-soft); }
.agent-input:disabled { opacity: .5; }
.agent-statusline { display: flex; align-items: center; gap: 8px; flex-shrink: 0; padding: 6px 2px; font-size: 12px; color: var(--text-3); }
.agent-statusline.done { color: var(--success); font-weight: 600; }
.status-spinner { width: 12px; height: 12px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spins .8s linear infinite; flex-shrink: 0; }
@keyframes spins { to { transform: rotate(360deg); } }
.status-dots::after { content: ''; display: inline-block; width: 14px; text-align: left; animation: dotseq 1.2s steps(1, end) infinite; }
@keyframes dotseq { 0% { content: ''; } 25% { content: '.'; } 50% { content: '..'; } 75% { content: '...'; } }