/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1F67FE;
    --primary-light: #E8F0FF;
    --primary-dark: #1558DB;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #6366F1;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --bg-primary: #F8FAFC;
    --bg-card: #FFFFFF;
    --border: #E5E7EB;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --sidebar-width: 240px;
    --sidebar-bg: #1E293B;
    --sidebar-text: #CBD5E1;
    --sidebar-active: #1F67FE;
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    overflow-x: hidden;
}

/* ==================== 布局 ==================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
    color: #FFFFFF;
}

.sidebar-logo-icon {
    font-size: 24px;
}

.sidebar-nav {
    padding: 12px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 14px;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #FFFFFF;
}

.nav-item.active {
    background: rgba(31, 103, 254, 0.15);
    color: #FFFFFF;
    border-left-color: var(--primary);
}

.nav-icon {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* 顶部栏 */
.topbar {
    background: var(--bg-card);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.week-badge {
    background: var(--primary-light);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

/* 内容区 */
.page-content {
    padding: 24px;
    display: none;
}

.page-content.active {
    display: block;
}

/* 移动端底部导航 */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 6px 0;
    padding-bottom: calc(6px + env(safe-area-inset-bottom));
}

.mobile-nav-list {
    display: flex;
    justify-content: space-around;
    list-style: none;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 10px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 11px;
    transition: color 0.2s;
}

.mobile-nav-item.active {
    color: var(--primary);
}

.mobile-nav-icon {
    font-size: 20px;
}

.mobile-more-menu {
    display: none;
    position: fixed;
    bottom: 70px;
    right: 10px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    z-index: 200;
    min-width: 160px;
}

.mobile-more-menu.show {
    display: block;
}

.mobile-more-item {
    padding: 10px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.mobile-more-item:hover {
    background: var(--bg-primary);
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-title-icon {
    font-size: 18px;
}

.card-action {
    color: var(--primary);
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
}

.card-action:hover {
    text-decoration: underline;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-primary);
    color: var(--text-primary);
    white-space: nowrap;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-success {
    background: var(--success);
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

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

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

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

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 15px;
}

.btn-block {
    width: 100%;
}

/* ==================== 表单 ==================== */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s;
    background: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(31, 103, 254, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

/* ==================== 表格 ==================== */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table th {
    background: var(--bg-primary);
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.table td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.table tr:hover {
    background: var(--bg-primary);
}

/* ==================== 标签 ==================== */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.tag-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.tag-success {
    background: #D1FAE5;
    color: var(--success);
}

.tag-warning {
    background: #FEF3C7;
    color: var(--warning);
}

.tag-danger {
    background: #FEE2E2;
    color: var(--danger);
}

.tag-info {
    background: #E0E7FF;
    color: var(--info);
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 12px;
}

.stat-icon.blue { background: var(--primary-light); }
.stat-icon.green { background: #D1FAE5; }
.stat-icon.orange { background: #FEF3C7; }
.stat-icon.red { background: #FEE2E2; }
.stat-icon.purple { background: #E0E7FF; }

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ==================== 快捷操作 ==================== */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.quick-action-btn:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
}

.quick-action-icon {
    font-size: 28px;
}

.quick-action-text {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
}

/* ==================== 小组排名 ==================== */
.rank-list {
    list-style: none;
}

.rank-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

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

.rank-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-secondary);
}

.rank-number.top1 { background: #FCD34D; color: #92400E; }
.rank-number.top2 { background: #D1D5DB; color: #374151; }
.rank-number.top3 { background: #FCD9B6; color: #92400E; }

.rank-info {
    flex: 1;
}

.rank-name {
    font-weight: 500;
}

.rank-score {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.rank-sub {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==================== 记录列表 ==================== */
.record-list {
    list-style: none;
}

.record-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

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

.record-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

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

.record-name {
    font-weight: 500;
    font-size: 14px;
}

.record-reason {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.record-score {
    font-weight: 600;
    font-size: 15px;
}

.record-score.add { color: var(--success); }
.record-score.minus { color: var(--danger); }

.record-time {
    font-size: 12px;
    color: var(--text-light);
}

/* ==================== 学生卡片 ==================== */
.student-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.student-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    cursor: grab;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.student-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.student-card.dragging {
    opacity: 0.5;
}

.student-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.student-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
    color: white;
}

.avatar-male { background: #3B82F6; }
.avatar-female { background: #EC4899; }
.avatar-unknown { background: var(--text-secondary); }

.student-info {
    flex: 1;
}

.student-name {
    font-size: 16px;
    font-weight: 600;
}

.student-id {
    font-size: 12px;
    color: var(--text-secondary);
}

.student-score {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.student-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.student-actions {
    display: flex;
    gap: 6px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

/* ==================== 小组看板 ==================== */
.view-toggle {
    display: flex;
    gap: 4px;
    background: var(--bg-primary);
    padding: 4px;
    border-radius: var(--radius);
}

.view-toggle-btn {
    padding: 6px 12px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.view-toggle-btn.active {
    background: white;
    color: var(--primary);
    box-shadow: var(--shadow);
}

.group-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.group-column {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--shadow);
    min-height: 300px;
}

.group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

.group-name {
    font-weight: 600;
    font-size: 15px;
}

.group-count {
    background: var(--primary-light);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
}

.group-students {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 200px;
}

.group-students.drag-over {
    background: var(--primary-light);
    border-radius: var(--radius);
}

.group-student-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-primary);
    border-radius: var(--radius);
    cursor: grab;
    transition: all 0.2s;
}

.group-student-item:hover {
    background: #EEF2FF;
}

.group-student-item.dragging {
    opacity: 0.5;
}

.group-student-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    font-weight: 600;
}

.group-student-name {
    flex: 1;
    font-size: 14px;
}

.group-student-score {
    font-weight: 600;
    color: var(--primary);
    font-size: 14px;
}

/* ==================== 座次表 ==================== */
.seating-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}

.teacher-desk {
    width: 200px;
    margin: 0 auto 40px;
    padding: 16px;
    background: var(--primary);
    color: white;
    text-align: center;
    border-radius: var(--radius);
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.seating-grid {
    display: grid;
    gap: 12px;
    justify-content: center;
    margin-bottom: 24px;
}

.seat {
    width: 100px;
    height: 60px;
    background: var(--bg-primary);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.seat:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.seat.drag-over {
    background: var(--primary-light);
    border-color: var(--primary);
    border-style: solid;
}

.seat.filled {
    background: white;
    border: 2px solid var(--primary);
    border-style: solid;
}

.seat-student {
    text-align: center;
    font-size: 13px;
    font-weight: 500;
}

.seat-student-name {
    font-weight: 600;
}

.seat-student-score {
    font-size: 11px;
    color: var(--text-secondary);
}

.seat-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: white;
    padding: 8px 12px;
    border-radius: var(--radius);
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 10;
    margin-bottom: 8px;
}

.seat:hover .seat-tooltip {
    opacity: 1;
}

.seating-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.seating-plan-select {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ==================== 模态框 ==================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlide 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--bg-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.modal-lg {
    max-width: 800px;
}

/* ==================== 筛选栏 ==================== */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.filter-select,
.filter-input {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    min-width: 120px;
}

/* ==================== 值日日历 ==================== */
.duty-calendar {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.calendar-month {
    font-size: 16px;
    font-weight: 600;
}

.calendar-nav {
    display: flex;
    gap: 8px;
}

.calendar-nav button {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.calendar-weekday {
    text-align: center;
    padding: 8px;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
}

.calendar-day {
    min-height: 80px;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.calendar-day:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}

.calendar-day.other-month {
    opacity: 0.3;
}

.calendar-day.today {
    border-color: var(--primary);
    background: var(--primary-light);
}

.calendar-day-number {
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 4px;
}

.calendar-day-duty {
    font-size: 11px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ==================== 图表容器 ==================== */
.chart-container {
    position: relative;
    height: 300px;
}

.chart-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

/* ==================== 班委卡片 ==================== */
.committee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.committee-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.2s;
}

.committee-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.committee-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--info));
}

.committee-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.committee-position {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 8px;
}

.committee-remark {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ==================== 空状态 ==================== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

.empty-text {
    font-size: 14px;
}

/* ==================== 加载状态 ==================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==================== 提示消息 ==================== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: var(--radius);
    color: white;
    font-size: 14px;
    z-index: 2000;
    animation: toastSlide 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
.toast.info { background: var(--info); }

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==================== 隐藏文件输入 ==================== */
.file-input {
    display: none;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding-bottom: 70px;
    }
    
    .mobile-nav {
        display: block;
    }
    
    .topbar {
        padding: 0 16px;
    }
    
    .page-content {
        padding: 16px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .chart-row {
        grid-template-columns: 1fr;
    }
    
    .seat {
        width: 70px;
        height: 50px;
    }
    
    .seat-student-name {
        font-size: 11px;
    }
    
    .calendar-day {
        min-height: 60px;
    }
    
    .calendar-day-duty {
        display: none;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .seating-grid {
        gap: 6px;
    }
    
    .seat {
        width: 60px;
        height: 45px;
    }
    
    .seat-student-name {
        font-size: 10px;
    }
    
    .seat-student-score {
        display: none;
    }
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}