* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
body {
    background: #f4f7fa;
    color: #222;
    line-height: 1.55;
}
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 14px;
}

/* ===== 头部 ===== */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
header h1 {
    font-size: 22px;
    color: #1a3a5c;
}
.sync-box {
    display: flex;
    align-items: center;
}
.sync-box span {
    font-size: 13px;
    margin-left: 8px;
    color: #555;
}

/* ===== 卡片通用 ===== */
.card {
    background: #fff;
    padding: 14px;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

/* ===== 标签导航 ===== */
.tab-bar {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}
.tab {
    padding: 9px 16px;
    border: none;
    background: #dde4ec;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    color: #333;
    transition: all 0.2s;
}
.tab:hover {
    background: #c8d3e0;
}
.tab.active {
    background: #2b7cd3;
    color: #fff;
}
.panel {
    display: none;
}
.panel.active {
    display: block;
}

/* ===== 首页布局 ===== */
.row {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 16px;
}
.col-right {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* ===== 日历 ===== */
.calendar-wrap {
    background: #fff;
}
.cal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.cal-header h2 {
    font-size: 16px;
}
.cal-header button {
    border: none;
    background: #e8edf3;
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
}
.cal-week {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 13px;
    color: #666;
    margin-bottom: 6px;
    font-weight: bold;
}
.cal-week span {
    padding: 4px 0;
}
.cal-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}
.cal-day {
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: background 0.15s;
}
.cal-day:hover {
    background: #e8f0fe;
}
.cal-day.empty {
    cursor: default;
    background: transparent;
}
.cal-day.today {
    background: #2b7cd3;
    color: white;
    font-weight: bold;
}
.cal-day.selected {
    background: #74a8e8;
    color: white;
}
.cal-day.hasLesson::after {
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #23b968;
    position: absolute;
    bottom: 4px;
}

/* ===== 表单 ===== */
.form-line {
    margin: 8px 0;
}
.form-line label {
    display: block;
    font-size: 14px;
    color: #444;
    margin-bottom: 4px;
}
.form-line input[type="text"],
.form-line select,
.form-line textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid #d8dde4;
    border-radius: 6px;
    font-size: 14px;
}
.form-line input[type="checkbox"] {
    margin-right: 6px;
}
textarea {
    width: 100%;
    min-height: 90px;
    padding: 9px;
    border: 1px solid #d8dde4;
    border-radius: 7px;
    resize: vertical;
    margin: 6px 0;
    font-size: 14px;
}

/* ===== 按钮 ===== */
.btn-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 8px 0;
}
button {
    padding: 8px 14px;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    background: #2b7cd3;
    color: #fff;
    font-size: 14px;
    transition: opacity 0.15s;
}
button:hover {
    opacity: 0.88;
}
button.gray {
    background: #99a4b2;
}
button.danger {
    background: #dd4444;
}
button.success {
    background: #23b968;
}

/* ===== 顺序点名区 ===== */
.rollcall-seq-area {
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #f8fafc;
    border-radius: 8px;
    margin: 10px 0;
    padding: 16px;
}
.seq-placeholder {
    color: #888;
    font-size: 14px;
}
.seq-progress {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}
.seq-student-name {
    font-size: 36px;
    font-weight: bold;
    color: #1a3a5c;
    margin: 10px 0;
    text-align: center;
}
.seq-buttons {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}
.seq-btn-present,
.seq-btn-absent {
    padding: 14px 36px;
    font-size: 20px;
    border-radius: 10px;
    font-weight: bold;
}
.seq-btn-present {
    background: #23b968;
}
.seq-btn-absent {
    background: #dd4444;
}
.seq-done {
    font-size: 20px;
    color: #23b968;
    font-weight: bold;
    text-align: center;
}

/* ===== 出勤纠错列表 ===== */
.rollcall-review {
    margin-top: 14px;
    border-top: 1px solid #eee;
    padding-top: 12px;
}
.review-title {
    font-size: 13px;
    color: #666;
    margin-bottom: 8px;
}
.review-list {
    max-height: 260px;
    overflow-y: auto;
}
.review-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    border-radius: 5px;
    margin-bottom: 4px;
    background: #f8fafc;
}
.review-item.present {
    border-left: 3px solid #23b968;
}
.review-item.absent {
    border-left: 3px solid #dd4444;
    background: #fff5f5;
}
.review-name {
    font-size: 14px;
    flex: 1;
}
.review-status {
    font-size: 12px;
    margin-right: 10px;
    font-weight: bold;
}
.review-status.present {
    color: #23b968;
}
.review-status.absent {
    color: #dd4444;
}
.review-toggle-btn {
    padding: 4px 10px;
    font-size: 12px;
    border-radius: 5px;
}

/* ===== 手记 & AI存档 ===== */
.saved-ai-log-title {
    margin-top: 12px;
    font-weight: bold;
    font-size: 14px;
}
#savedAiLogBox {
    margin-top: 8px;
    font-size: 14px;
    max-height: 180px;
    overflow: auto;
}
.ai-log-item {
    border-bottom: 1px solid #eee;
    padding: 6px 0;
}
.ai-log-time {
    font-size: 12px;
    color: #666;
}

/* ===== AI对话 ===== */
.ai-top-bar {
    margin-bottom: 12px;
}
#modelSelect {
    padding: 6px;
    border-radius: 6px;
    border: 1px solid #d8dde4;
    font-size: 14px;
}
.chat-box {
    min-height: 320px;
    max-height: 420px;
    overflow-y: auto;
    margin-bottom: 12px;
}
.msg {
    margin: 8px 0;
    padding: 9px 12px;
    border-radius: 9px;
    max-width: 86%;
    word-wrap: break-word;
    white-space: pre-wrap;
}
.msg.user {
    background: #2b7cd3;
    color: #fff;
    margin-left: auto;
}
.msg.ai {
    background: #eef3f9;
    color: #222;
    margin-right: auto;
}
.chat-input-area {
    margin-bottom: 12px;
}
.chat-btn-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ===== 教案管理 ===== */
.lesson-plan-item {
    border: 1px solid #e8edf3;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
    background: #fafbfc;
}
.lp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 6px;
}
.lp-title {
    font-weight: bold;
    font-size: 15px;
    color: #1a3a5c;
}
.lp-meta {
    font-size: 12px;
    color: #888;
    margin-bottom: 6px;
}
.lp-content {
    font-size: 14px;
    color: #333;
    white-space: pre-wrap;
    margin-top: 6px;
}
.lp-actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}
.lp-actions button {
    padding: 4px 10px;
    font-size: 12px;
}

/* ===== 课堂活动资源 ===== */
.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.random-btn {
    background: #f39c12;
}
.random-result {
    background: #fff8e6;
    border: 1px solid #f39c12;
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 14px;
    display: none;
}
.random-result.show {
    display: block;
}
.random-result h4 {
    color: #d68910;
    margin-bottom: 6px;
}
.activity-item {
    border: 1px solid #e8edf3;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
    background: #fafbfc;
}
.act-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}
.act-title {
    font-weight: bold;
    font-size: 15px;
    color: #1a3a5c;
}
.act-category {
    display: inline-block;
    background: #e8f0fe;
    color: #2b7cd3;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-left: 8px;
}
.act-content {
    font-size: 14px;
    color: #333;
    white-space: pre-wrap;
    margin-top: 6px;
}
.act-actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}
.act-actions button {
    padding: 4px 10px;
    font-size: 12px;
}

/* ===== 学生名册管理 ===== */
.roster-class-item {
    border: 1px solid #e8edf3;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
    background: #fafbfc;
}
.roster-class-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.roster-class-name {
    font-weight: bold;
    font-size: 16px;
    color: #1a3a5c;
}
.roster-student-count {
    font-size: 13px;
    color: #888;
    margin-left: 8px;
}
.roster-students {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 8px 0;
}
.roster-student-tag {
    background: #eef3f9;
    padding: 4px 10px;
    border-radius: 5px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.roster-student-tag .remove-stu {
    cursor: pointer;
    color: #dd4444;
    font-weight: bold;
    font-size: 14px;
}
.roster-add-student {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}
.roster-add-student input {
    flex: 1;
    padding: 6px;
    border: 1px solid #d8dde4;
    border-radius: 5px;
    font-size: 13px;
}
.roster-add-student button {
    padding: 6px 12px;
    font-size: 13px;
}
.roster-actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}
.roster-actions button {
    padding: 4px 10px;
    font-size: 12px;
}

/* ===== 课时出勤统计 ===== */
.stats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 12px;
}
.stats-filter label {
    font-size: 14px;
}
.stats-filter select {
    padding: 6px;
    border-radius: 6px;
    border: 1px solid #d8dde4;
    font-size: 14px;
    margin-left: 6px;
}
.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 10px;
}
.stat-card {
    background: #f8fafc;
    border-radius: 8px;
    padding: 14px;
    text-align: center;
}
.stat-card .stat-num {
    font-size: 28px;
    font-weight: bold;
    color: #2b7cd3;
}
.stat-card .stat-label {
    font-size: 13px;
    color: #666;
    margin-top: 4px;
}
.stat-record-item {
    border: 1px solid #e8edf3;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
    background: #fafbfc;
}
.stat-record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}
.stat-record-date {
    font-weight: bold;
    font-size: 15px;
    color: #1a3a5c;
}
.stat-record-class {
    background: #e8f0fe;
    color: #2b7cd3;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
}
.stat-record-cancelled {
    background: #fff0f0;
    color: #dd4444;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: bold;
}
.stat-record-info {
    font-size: 13px;
    color: #555;
    margin-bottom: 6px;
}
.stat-record-absent-list {
    font-size: 13px;
    color: #dd4444;
    margin-top: 4px;
}
.stat-record-actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}
.stat-record-actions button {
    padding: 4px 10px;
    font-size: 12px;
}
.stat-edit-area {
    margin-top: 10px;
    padding: 10px;
    background: #fff;
    border-radius: 6px;
    border: 1px solid #e8edf3;
}
.stat-edit-students {
    max-height: 200px;
    overflow-y: auto;
    margin: 8px 0;
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .row {
        grid-template-columns: 1fr;
    }
    .seq-student-name {
        font-size: 28px;
    }
    .seq-btn-present,
    .seq-btn-absent {
        padding: 12px 24px;
        font-size: 17px;
    }
    .tab-bar {
        gap: 4px;
    }
    .tab {
        padding: 8px 12px;
        font-size: 14px;
    }
}