/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg);
    background-image:
        linear-gradient(var(--bg-pattern) 1px, transparent 1px),
        linear-gradient(90deg, var(--bg-pattern) 1px, transparent 1px);
    background-size: 40px 40px;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 头部样式 */
.header {
    background: var(--card);
    padding: 24px 32px;
    margin-bottom: 20px;
    border-radius: 12px;
    border: 1px solid var(--line);
    box-shadow: 0 6px 18px rgba(31, 42, 55, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text);
}

.current-time {
    background: var(--card-soft);
    color: var(--primary);
    padding: 8px 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.user-meta {
    color: var(--muted);
    font-size: 14px;
}

.logout-btn {
    padding: 8px 16px;
    background: var(--card-soft);
    color: var(--primary);
    border: 1px solid var(--line);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

/* 筛选区域 */
.filter-section {
    background: var(--card);
    padding: 20px 24px;
    margin-bottom: 20px;
    border-radius: 12px;
    border: 1px solid var(--line);
    box-shadow: 0 6px 18px rgba(31, 42, 55, 0.08);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 150px;
}

.filter-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted);
}

/* 时间筛选组 - 横向布局 */
.time-filter-group {
    min-width: auto;
}

.time-selects {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.time-selects .filter-select {
    flex: 1;
    min-width: 120px;
}

.filter-select {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text);
    background: #fff;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-select:hover {
    border-color: var(--line-strong);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(63, 126, 166, 0.15);
}

.filter-input {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text);
    background: #fff;
    transition: all 0.2s;
}

.filter-input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(63, 126, 166, 0.15);
}

/* 学生卡片网格 */
.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

/* 学生卡片 */
.student-card {
    background: var(--card);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 4px 14px rgba(31, 42, 55, 0.06);
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid var(--line);
    position: relative;
    overflow: hidden;
}

.student-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(63, 126, 166, 0.65);
}

.student-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 22px rgba(31, 42, 55, 0.12);
    border-color: var(--primary);
}

/* 有课学生卡片 - 突出显示 */
.student-card.has-current-class {
    border-color: rgba(198, 87, 70, 0.45);
    background: var(--danger-soft);
    animation: pulse 2s ease-in-out infinite;
}

.student-card.has-current-class::before {
    background: rgba(198, 87, 70, 0.72);
    height: 4px;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 14px rgba(198, 87, 70, 0.16);
    }
    50% {
        box-shadow: 0 8px 24px rgba(198, 87, 70, 0.28);
    }
}

/* 卡片头部 */
.student-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

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

.student-badge {
    background: rgba(63, 126, 166, 0.12);
    color: var(--primary);
    border: 1px solid rgba(63, 126, 166, 0.28);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.student-card.has-current-class .student-badge {
    background: rgba(198, 87, 70, 0.12);
    color: var(--danger);
    border-color: rgba(198, 87, 70, 0.45);
    animation: badgePulse 1.5s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* 卡片信息 */
.student-info {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.8;
}

.student-info div {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.info-label {
    font-weight: 500;
    color: var(--muted);
}

.info-value {
    font-weight: 600;
    color: var(--text);
}

/* 当前课程提示 */
.current-class-indicator {
    margin-top: 12px;
    padding: 8px 12px;
    background: var(--danger-soft);
    border-left: 3px solid var(--danger);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--danger);
    font-weight: 600;
}

/* 空闲学生卡片 - 绿色样式 */
.student-card.is-free::before {
    background: rgba(47, 143, 99, 0.7);
    height: 3px;
}

.student-card.is-free .student-badge {
    background: var(--success-soft);
    color: var(--success);
    border-color: rgba(47, 143, 99, 0.3);
}

/* 暂无课表卡片 - 中性灰 */
.student-card.no-schedule::before {
    background: rgba(102, 112, 133, 0.5);
}

.student-card.no-schedule .student-badge {
    background: #f2f4f7;
    color: var(--muted);
    border-color: #d0d5dd;
}

.student-card.no-schedule:hover {
    border-color: var(--line-strong);
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(31, 42, 55, 0.45);
    backdrop-filter: blur(4px);
    overflow-y: auto;
}

.modal-content {
    background-color: var(--card);
    margin: 2% auto;
    padding: 0;
    border-radius: 16px;
    border: 1px solid var(--line);
    width: 95%;
    max-width: 1200px;
    max-height: 95vh;
    box-shadow: 0 20px 28px rgba(31, 42, 55, 0.18);
    animation: modalSlideIn 0.3s ease;
    display: flex;
    flex-direction: column;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    background: var(--card-soft);
    color: var(--text);
    border-bottom: 1px solid var(--line);
    padding: 16px 24px;
    border-radius: 16px 16px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.close {
    color: var(--muted);
    font-size: 28px;
    font-weight: 300;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s;
}

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

.modal-body {
    padding: 20px 24px;
    overflow: hidden;
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

/* 学生信息展示 */
.student-info-display {
    background: #f9fbfd;
    border: 1px solid var(--line);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.student-info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.student-info-label {
    font-size: 0.75rem;
    color: var(--muted);
    font-weight: 500;
    text-transform: uppercase;
}

.student-info-value {
    font-size: 0.95rem;
    color: var(--text);
    font-weight: 600;
}

/* 课表展示 */
.schedule-display {
    overflow: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    position: relative;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    height: 100%;
    display: table;
    table-layout: fixed;
}

.schedule-table tbody {
    height: 100%;
}

.schedule-table tr {
    height: 20%;
}

.schedule-table th,
.schedule-table td {
    padding: 20px 8px;
    text-align: center;
    border: 1px solid var(--line);
    font-size: 0.85rem;
    vertical-align: middle;
    width: auto;
}

.schedule-table th:first-child,
.schedule-table td:first-child {
    width: 80px;
    min-width: 80px;
}

.schedule-table th:nth-child(2),
.schedule-table td:nth-child(2) {
    width: 60px;
    min-width: 60px;
}

.schedule-table th {
    background: var(--card-soft);
    color: var(--text);
    font-weight: 600;
    padding: 12px 8px;
    border-bottom: 2px solid var(--line-strong);
}

.schedule-table td {
    background: #fff;
    vertical-align: middle;
}

.schedule-table .time-label {
    background: #f5f8fb;
    font-weight: 600;
    color: var(--muted);
    min-width: 60px;
}

/* 课程单元格样式 */
.schedule-table td.has-course {
    cursor: pointer;
    position: relative;
    overflow: visible;
}

/* 课程名称显示 */
.schedule-table td .course-name-display {
    font-weight: 600;
    font-size: 0.9rem;
}

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

/* 详细信息默认隐藏 */
.schedule-table td .course-details {
    display: none;
    position: absolute;
    left: 100%;
    top: 0;
    margin-left: 8px;
    background: #fff;
    backdrop-filter: blur(10px);
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    padding: 12px 16px;
    min-width: 220px;
    z-index: 9999;
    box-shadow: 0 8px 20px rgba(31, 42, 55, 0.14);
    text-align: left;
    pointer-events: none;
    white-space: nowrap;
}

.schedule-table td .course-details div {
    font-size: 0.9rem;
    line-height: 2;
    color: var(--text);
    white-space: nowrap;
}

/* 鼠标悬停显示详细信息 */
.schedule-table td.has-course:hover .course-details {
    display: block;
    animation: fadeInDetails 0.15s ease;
}

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

/* 当前时间高亮 - 红色背景 */
.schedule-table td.current-time {
    background: rgba(198, 87, 70, 0.12) !important;
    color: var(--danger) !important;
    border: 1px solid rgba(198, 87, 70, 0.45) !important;
}

.schedule-table td.current-time .course-name-display {
    color: var(--danger) !important;
    font-weight: 700;
}

/* 正在上课的课程，悬停详细信息样式 */
.schedule-table td.current-time .course-details {
    border-color: rgba(198, 87, 70, 0.45);
    background: #fff;
}

.schedule-table td.current-time .course-details div {
    color: var(--text);
}

/* 加载指示器 */
.loading-indicator {
    text-align: center;
    padding: 60px 20px;
    color: var(--primary);
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 16px;
    border: 4px solid rgba(63, 126, 166, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

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

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--muted);
    font-size: 1.125rem;
}

/* 退出登录确认弹窗 */
.confirm-overlay {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(31, 42, 55, 0.35);
    padding: 20px;
}

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

.confirm-dialog {
    width: min(420px, 100%);
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 20px 36px rgba(31, 42, 55, 0.2);
    padding: 22px 22px 18px;
    animation: confirmPop 0.18s ease;
}

.confirm-title {
    margin-bottom: 8px;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 700;
}

.confirm-text {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 18px;
}

.confirm-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.confirm-btn {
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    padding: 8px 14px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.cancel-btn {
    background: var(--card-soft);
    color: var(--text);
    border-color: var(--line);
}

.cancel-btn:hover {
    background: #e5ebf1;
}

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

.danger-btn:hover {
    background: #b24d3f;
    border-color: #b24d3f;
}

@keyframes confirmPop {
    from {
        opacity: 0;
        transform: translateY(6px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .header-actions {
        width: 100%;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .filter-section {
        padding: 16px;
    }

    .filter-group {
        min-width: 100%;
    }

    .time-selects {
        flex-direction: column;
    }

    .time-selects .filter-select {
        width: 100%;
    }

    .students-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        margin: 5% auto;
    }

    .modal-body {
        padding: 16px;
    }

    .student-info-display {
        grid-template-columns: 1fr;
    }

    .schedule-table {
        font-size: 0.75rem;
    }

    .schedule-table th,
    .schedule-table td {
        padding: 12px 6px;
    }

    .schedule-table td .course-name-display {
        font-size: 0.8rem;
    }
}