/**
 * AI 测评页样式
 * 颜色沿用 base.css 变量；红色用 #f44336（对齐 chat.css / settings.css 现有惯例）
 */

.quiz-app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* ===== 顶栏 ===== */
.quiz-topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.quiz-back-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
}

.quiz-topbar-title {
    flex: 1;
    font-size: 16px;
    font-weight: 600;
}

.quiz-topbar-student {
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

.quiz-topbar-student:hover { color: var(--text-primary); }
.quiz-topbar-avatar { font-size: 18px; }

/* ===== 个人中心弹窗 ===== */
.quiz-profile {
    padding: 20px 24px;
    background: var(--bg-primary);
}

.quiz-profile-row {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 14px;
}

.quiz-profile-row > label {
    flex: 0 0 70px;
    font-size: 14px;
    color: var(--text-secondary);
    padding-top: 8px;
}

.quiz-profile-row > div, .quiz-profile-row > span, .quiz-profile-row > select, .quiz-profile-row > input {
    flex: 1;
    min-width: 0;
}

.quiz-profile-static { font-size: 14px; padding-top: 8px; }

.quiz-profile-lockrow {
    display: flex;
    gap: 8px;
}

.quiz-profile-lockrow .quiz-input[readonly] { opacity: 0.7; }

.quiz-avatar-current {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin-bottom: 8px;
}

.quiz-avatar-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.quiz-avatar-opt {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
}

.quiz-avatar-opt:hover { border-color: var(--accent-blue); }
.quiz-avatar-opt.active { border-color: var(--accent-blue); background: var(--bg-hover); }

.quiz-profile-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

/* ===== 视图容器 ===== */
.quiz-body {
    flex: 1;
    overflow-y: auto;
    /* 底部留足空隙：手机上浏览器工具栏/安全区会遮住贴底内容（如"共 N 个符合条件的课程"） */
    padding: 20px 16px calc(48px + env(safe-area-inset-bottom, 0px));
}

.quiz-view {
    display: none;
    max-width: 760px;
    margin: 0 auto;
}

.quiz-view.active {
    display: block;
}

/* ===== 通用组件 ===== */
.quiz-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
}

.quiz-card-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 14px;
}

.quiz-input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 10px 12px;
    font-size: 14px;
    outline: none;
    resize: vertical;
}

.quiz-input:focus {
    border-color: var(--accent-blue);
}

.quiz-btn {
    border: none;
    border-radius: 8px;
    padding: 10px 22px;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.15s;
}

.quiz-btn:hover { opacity: 0.85; }
.quiz-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.quiz-btn-primary {
    background: var(--accent-blue);
    color: #fff;
}

.quiz-btn-ghost {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.quiz-btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.quiz-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 18px;
}

.quiz-form-row {
    margin-bottom: 14px;
}

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

.quiz-loading, .quiz-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 48px 0;
}

/* ===== 登录 ===== */
.quiz-login-card {
    max-width: 360px;
    margin: 10vh auto 0;
    text-align: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 36px 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.quiz-login-icon { font-size: 42px; }
.quiz-login-title { font-size: 20px; font-weight: 600; }
.quiz-login-sub { font-size: 13px; color: var(--text-secondary); }

/* ===== 主页（功能对齐智培AI「我的课程」） ===== */
.quiz-topbar-logout {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    padding: 4px;
}

.quiz-topbar-logout:hover { color: var(--text-primary); }

.quiz-report-banner {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.quiz-report-banner a {
    color: var(--accent-blue);
    cursor: pointer;
    font-weight: 600;
}

.quiz-report-banner a:hover { text-decoration: underline; }

.quiz-home-quick {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.quiz-quick-card {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 18px;
    cursor: pointer;
    transition: background 0.15s;
}

.quiz-quick-card:hover { background: var(--bg-hover); }
.quiz-quick-icon { font-size: 24px; }
.quiz-quick-name { display: block; font-size: 14px; font-weight: 600; }
.quiz-quick-desc { display: block; font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

.quiz-home-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 18px 20px;
}

.quiz-home-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 14px;
}

.quiz-tabs {
    display: flex;
    gap: 24px;
}

.quiz-tab {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 4px 12px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.quiz-tab:hover { color: var(--text-primary); }

.quiz-tab.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.quiz-search {
    display: flex;
    gap: 8px;
    padding-bottom: 10px;
}

.quiz-search .quiz-input {
    width: 240px;
    border-radius: 18px;
    padding: 8px 14px;
}

.quiz-search .quiz-btn {
    border-radius: 18px;
    padding: 8px 20px;
}

.quiz-chips-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.quiz-chips-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-right: 4px;
}

.quiz-chip {
    font-size: 13px;
    padding: 4px 14px;
    border-radius: 14px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s;
}

.quiz-chip:hover { color: var(--text-primary); }

.quiz-chip.active {
    background: var(--accent-blue);
    color: #fff;
}

.quiz-home-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    margin-top: 6px;
    min-height: 120px;
}

.quiz-home-card {
    position: relative;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 12px 12px 14px;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

.quiz-home-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

/* 左上角绶带角标（对齐参考卡片的「学」角标造型） */
.quiz-home-card-badge {
    position: absolute;
    top: -1px;
    left: -1px;
    z-index: 1;
    background: var(--accent-blue);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 16px 4px 12px;
    border-radius: 13px 0 0 0;
    clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

.quiz-home-card-badge.done { background: var(--accent-green); }

/* 封面图区：渐变底 + 大图标 + 右上学科水印 */
.quiz-home-card-cover {
    position: relative;
    height: 104px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.20), rgba(33, 150, 243, 0.06));
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 12px;
}

.quiz-home-card-cover.done {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.20), rgba(76, 175, 80, 0.06));
}

.quiz-home-card-cover-icon {
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.3));
}

.quiz-home-card-watermark {
    position: absolute;
    top: 6px;
    right: 12px;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    color: rgba(255, 255, 255, 0.10);
    pointer-events: none;
}

.quiz-home-card-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.quiz-home-card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 10px;
}

/* 药丸标签（对齐参考卡片的「公开课程」样式，用本站主题色） */
.quiz-pill {
    font-size: 12px;
    padding: 3px 12px;
    border-radius: 12px;
    background: rgba(33, 150, 243, 0.15);
    color: var(--accent-blue);
}

.quiz-pill.green {
    background: rgba(76, 175, 80, 0.15);
    color: var(--accent-green);
}

.quiz-home-card-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 10px;
    min-height: 16px;
}

.quiz-home-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
}

.quiz-home-count {
    font-size: 13px;
    color: var(--text-secondary);
}

.quiz-pagination { display: flex; gap: 6px; }

.quiz-page-btn {
    min-width: 30px;
    height: 30px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
}

.quiz-page-btn:hover:not([disabled]) { border-color: var(--accent-blue); }
.quiz-page-btn.active { background: var(--accent-blue); border-color: var(--accent-blue); color: #fff; }
.quiz-page-btn[disabled] { opacity: 0.4; cursor: not-allowed; }

/* ===== 题目 ===== */
.quiz-progress {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.quiz-badges {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.quiz-badge {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 10px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.quiz-badge-wrong { color: #f44336; }
.quiz-badge-mastered { color: var(--accent-green); }

.quiz-problem {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 14px;
}

.quiz-material {
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-blue);
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 14px;
}

.quiz-sub-questions .quiz-q {
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
    margin-top: 14px;
}

.quiz-opts {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 8px;
}

.quiz-opt {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    cursor: pointer;
    transition: border-color 0.15s;
}

.quiz-opt:hover { border-color: var(--accent-blue); }

.quiz-opt.selected {
    border-color: var(--accent-blue);
    background: var(--bg-hover);
}

.quiz-opt.selected .quiz-opt-mark {
    background: var(--accent-blue);
    color: #fff;
}

.quiz-q.locked .quiz-opt, .quiz-opt.locked { cursor: default; }
.quiz-q.locked .quiz-opt:hover { border-color: var(--border-color); }
.quiz-q.locked .quiz-opt.selected:hover { border-color: var(--accent-blue); }
.quiz-q.locked .quiz-text-answer { pointer-events: none; opacity: 0.7; }

.quiz-opt-mark {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quiz-opt-text { line-height: 1.6; font-size: 14px; }

/* 逐题解析里的对错标记 */
.quiz-opt.review-correct { border-color: var(--accent-green); }
.quiz-opt.review-correct .quiz-opt-mark { background: var(--accent-green); color: #fff; }
.quiz-opt.review-wrong { border-color: #f44336; }
.quiz-opt.review-wrong .quiz-opt-mark { background: #f44336; color: #fff; }

/* ===== 判分结果 ===== */
.quiz-result-card {
    border-radius: 8px;
    padding: 14px;
    margin-top: 12px;
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-green);
}

.quiz-result-card.wrong { border-left-color: #f44336; }

.quiz-result-head { font-size: 15px; font-weight: 600; color: var(--accent-green); }
.quiz-result-card.wrong .quiz-result-head { color: #f44336; }

.quiz-result-score { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

.quiz-result-rubric { margin-top: 8px; }

.quiz-rubric-row {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 3px 0;
}

.quiz-result-line {
    font-size: 13px;
    line-height: 1.7;
    margin-top: 8px;
}

.quiz-result-pending {
    color: var(--text-secondary);
    font-style: italic;
}

.quiz-help-row {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

/* ===== 汇总 / 成绩单 ===== */
.quiz-summary { text-align: center; }
.quiz-summary-icon { font-size: 40px; }
.quiz-summary-title { font-size: 18px; font-weight: 600; margin-top: 10px; }
.quiz-summary-score { font-size: 22px; font-weight: 700; color: var(--accent-green); margin-top: 10px; }
.quiz-summary-line { font-size: 14px; color: var(--text-secondary); margin-top: 6px; }

/* ===== 智能作业生成过场 ===== */
.quiz-gen-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    background: var(--bg-primary);
}

.quiz-gen-overlay.show { display: flex; }

.quiz-gen-spinner {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    border: 6px solid var(--bg-tertiary);
    border-top-color: var(--accent-blue);
    animation: quiz-gen-spin 1s linear infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.quiz-gen-icon {
    font-size: 36px;
    animation: quiz-gen-spin 1s linear infinite reverse;   /* 抵消旋转，图标保持正立 */
}

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

.quiz-gen-text { font-size: 16px; font-weight: 600; }

/* ===== 试卷两栏布局 + 答题卡 ===== */
.quiz-exam-layout {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: 16px;
    align-items: start;
}

.quiz-exam-aside {
    position: sticky;
    top: 8px;
    display: flex;
    flex-direction: column;
}

.quiz-sheet-actions {
    display: flex;
    gap: 10px;
}

.quiz-sheet-actions .quiz-btn { flex: 1; padding: 10px 0; }

.quiz-sheet-section { margin-bottom: 12px; }

.quiz-sheet-section-name {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.quiz-sheet-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.quiz-sheet-cell {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.15s;
}

.quiz-sheet-cell:hover { border-color: var(--accent-blue); }

.quiz-sheet-cell.done {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}

.quiz-sheet-counts {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
    margin-top: 4px;
}

.quiz-sheet-count-done { color: var(--accent-blue); }
.quiz-sheet-count-right { color: var(--accent-green); }
.quiz-sheet-count-wrong { color: #f44336; }

/* 判分回看：答题卡红绿标记 */
.quiz-sheet-cell.right {
    background: rgba(76, 175, 80, 0.15);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.quiz-sheet-cell.wrong {
    background: rgba(244, 67, 54, 0.15);
    border-color: #f44336;
    color: #f44336;
}

/* 判分回看：卷头分数戳 + 单题对错 */
.quiz-paper-head-graded { position: relative; }

.quiz-score-stamp {
    position: absolute;
    top: -4px;
    right: 8px;
    font-size: 44px;
    font-weight: 800;
    color: #f44336;
    transform: rotate(-8deg);
    border-bottom: 3px double #f44336;
    line-height: 1.1;
    padding: 0 6px 2px;
}

.quiz-q-graded {
    border-left: 3px solid var(--accent-green);
    padding-left: 12px;
}

.quiz-q-graded.wrong { border-left-color: #f44336; }

.quiz-graded-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 12px;
}

.quiz-graded-mark { font-size: 14px; font-weight: 600; }
.quiz-graded-mark.right { color: var(--accent-green); }
.quiz-graded-mark.wrong { color: #f44336; }

.quiz-explain-toggle {
    color: var(--accent-blue);
    font-size: 13px;
    cursor: pointer;
    user-select: none;
}

.quiz-explain-body {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 10px 12px;
    margin-top: 8px;
}

/* ===== 试卷 ===== */
.quiz-paper-head {
    text-align: center;
    padding: 10px 0 16px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 18px;
}

.quiz-paper-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.quiz-paper-meta {
    display: flex;
    justify-content: center;
    gap: 32px;
    font-size: 14px;
    color: var(--text-secondary);
}

.quiz-paper-meta b { color: var(--text-primary); font-weight: 600; }

.quiz-section { margin-top: 18px; }

.quiz-section-head {
    font-size: 15px;
    font-weight: 600;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 14px;
}

.quiz-section-score { font-size: 12px; color: var(--text-secondary); font-weight: 400; }

.quiz-section .quiz-q, .quiz-section .quiz-material-group { margin-bottom: 20px; }

/* ===== 逐题解析 ===== */
.quiz-review-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 12px;
}

.quiz-review-head {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.quiz-review-item.correct .quiz-review-mark { color: var(--accent-green); }
.quiz-review-item.wrong .quiz-review-mark { color: #f44336; }

/* ===== 列表（试卷/错题本） ===== */
.quiz-list-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: background 0.15s;
}

.quiz-list-item:hover { background: var(--bg-hover); }

.quiz-list-title {
    font-size: 14px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.quiz-list-sub {
    display: flex;
    gap: 6px;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ===== 学情报告 ===== */
.quiz-report-overall { text-align: center; }
.quiz-report-acc { font-size: 36px; font-weight: 700; color: var(--accent-green); }
.quiz-report-acc-label { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }

.quiz-report-stats {
    display: flex;
    justify-content: center;
    gap: 24px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 12px;
}

.quiz-weak-item {
    border-left: 3px solid #f44336;
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 10px;
}

.quiz-weak-head {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.quiz-weak-acc { color: #f44336; font-weight: 600; }
.quiz-weak-suggestion { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

.quiz-kp-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
}

.quiz-kp-name {
    flex: 0 0 130px;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.quiz-kp-bar {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    overflow: hidden;
}

.quiz-kp-bar-fill { height: 100%; border-radius: 4px; }
.quiz-kp-bar-fill.good { background: var(--accent-green); }
.quiz-kp-bar-fill.bad { background: #f44336; }

.quiz-kp-num {
    flex: 0 0 90px;
    text-align: right;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== 学科学习中心 ===== */
.quiz-subject-hero {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.15), rgba(76, 175, 80, 0.08));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}

.quiz-subject-hero-title { font-size: 18px; font-weight: 700; }
.quiz-subject-hero-desc { font-size: 13px; color: var(--text-secondary); margin: 8px 0 16px; }

.quiz-unit-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 4px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.quiz-unit-row:last-child { border-bottom: none; }
.quiz-unit-row:hover .quiz-unit-go { color: var(--accent-blue); }
.quiz-unit-name { font-size: 14px; }
.quiz-unit-go { font-size: 13px; color: var(--text-secondary); flex-shrink: 0; }

/* 课程中心一级 tab（学习中心/作业/智习室/错题库） */
.quiz-subject-tabs {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0 18px;
    margin-bottom: 16px;
}

/* 行为数据报告：近 30 天条形 */
.quiz-bh-chart {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 120px;
    margin-top: 14px;
    padding: 0 2px;
}

.quiz-bh-bar {
    flex: 1;
    height: 100%;
    display: flex;
    align-items: flex-end;
    cursor: default;
}

.quiz-bh-bar i {
    width: 100%;
    min-height: 2px;
    border-radius: 2px 2px 0 0;
    background: var(--accent-blue);
    opacity: 0.85;
}

.quiz-bh-axis {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* 锚点导航行（对齐参考图二级药丸 tab） */
.quiz-anchors {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 22px;
    padding: 6px 10px;
    margin-bottom: 16px;
}

.quiz-anchor {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 5px 14px;
    border-radius: 16px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.quiz-anchor:hover {
    background: var(--bg-hover);
    color: var(--accent-blue);
}

.quiz-anchor.active {
    background: var(--accent-blue);
    color: #fff;
}

/* 学习历史详情流水行 */
.quiz-hist-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 12px 4px;
    border-bottom: 1px solid var(--border-color);
}

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

.quiz-hist-mark {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.quiz-hist-row.correct .quiz-hist-mark { background: rgba(76, 175, 80, 0.15); color: var(--accent-green); }
.quiz-hist-row.wrong .quiz-hist-mark { background: rgba(244, 67, 54, 0.15); color: #f44336; }

.quiz-hist-main { flex: 1; min-width: 0; }

.quiz-hist-problem {
    display: block;
    font-size: 14px;
    line-height: 1.6;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.quiz-hist-meta {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 可展开区块（对齐参考图的 展开/收起 行） */
.quiz-collapse {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
}

.quiz-collapse-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
}

.quiz-collapse-head:hover { background: var(--bg-hover); }
.quiz-collapse-toggle { font-size: 12px; color: var(--text-secondary); font-weight: 400; }
.quiz-collapse-body { padding: 4px 20px 18px; }

.quiz-report-more {
    display: inline-block;
    font-size: 13px;
    color: var(--accent-blue);
    cursor: pointer;
    margin-top: 8px;
}

/* 学习历史统计 */
.quiz-stat-section-title {
    font-size: 14px;
    font-weight: 600;
    border-left: 3px solid var(--accent-blue);
    padding-left: 8px;
    margin: 14px 0 10px;
}

.quiz-stat-range-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.quiz-stat-range { width: 110px; padding: 4px 8px; font-size: 13px; }

.quiz-stat-time { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }

.quiz-stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 6px;
}

.quiz-stat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px;
}

.quiz-stat-card-name { font-size: 13px; font-weight: 600; }

.quiz-stat-card-nums { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }
.quiz-stat-card-nums i { font-style: normal; margin: 0 6px; color: var(--border-color); }

.quiz-stat-bigcards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 12px;
}

.quiz-stat-bigcard {
    background: var(--bg-tertiary);
    border-top: 3px solid var(--accent-blue);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.quiz-stat-bigcard span { font-size: 13px; color: var(--text-secondary); }
.quiz-stat-bigcard b { font-size: 20px; }
.quiz-stat-bigcard.green { border-top-color: var(--accent-green); }
.quiz-stat-bigcard.orange { border-top-color: #ff9800; }

.quiz-stat-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
    gap: 8px;
    align-items: center;
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 8px;
}

.quiz-stat-row-name { color: var(--text-primary); font-weight: 600; }
.quiz-stat-row b { color: var(--accent-green); }

/* ===== 智习室 ===== */
.quiz-sr-entry {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.quiz-sr-entry:hover { background: var(--bg-hover); }
.quiz-sr-entry-desc { flex: 1; font-size: 13px; color: var(--text-secondary); }

.quiz-sr-banner {
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.18), rgba(33, 150, 243, 0.05));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 22px 24px;
    margin-bottom: 16px;
}

.quiz-sr-banner-icon { font-size: 28px; }
.quiz-sr-banner-name { font-size: 17px; font-weight: 700; }

.quiz-sr-unit {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
}

.quiz-sr-unit-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    background: var(--bg-secondary);
    cursor: pointer;
    user-select: none;
}

.quiz-sr-unit-head:hover, .quiz-sr-unit-head.open { background: var(--bg-hover); }

.quiz-sr-unit-body { padding: 0 12px 8px; }

.quiz-sr-kp { border-top: 1px solid var(--border-color); }

.quiz-sr-kp-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 8px;
    cursor: pointer;
    user-select: none;
}

.quiz-sr-kp-head:hover { background: var(--bg-hover); border-radius: 8px; }

.quiz-sr-name {
    flex: 1;
    min-width: 0;
    font-size: 14px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.quiz-sr-kp-head .quiz-sr-name { font-weight: 400; }

.quiz-sr-stat {
    flex-shrink: 0;
    font-size: 13px;
    color: var(--text-secondary);
    min-width: 140px;
}

.quiz-sr-mastery {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.quiz-sr-mastery-bar {
    display: flex;
    gap: 2px;
}

.quiz-sr-mastery-bar i {
    width: 14px;
    height: 5px;
    border-radius: 2px;
}

.quiz-sr-practice {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--accent-blue);
    font-size: 13px;
    cursor: pointer;
    padding: 4px 6px;
}

.quiz-sr-practice:hover { text-decoration: underline; }

/* 单元展开指示箭头（展开态旋转 90°） */
.quiz-sr-caret {
    flex-shrink: 0;
    color: var(--text-secondary);
    font-size: 14px;
    transition: transform 0.2s;
}

.quiz-sr-unit-head.open .quiz-sr-caret { transform: rotate(90deg); }

.quiz-sr-desc {
    font-size: 14px;
    line-height: 1.8;
}

.quiz-sr-desc p { margin-bottom: 8px; }
.quiz-empty-inline { color: var(--text-secondary); font-size: 13px; }

/* ===== 知识点学习页 ===== */
.quiz-kp-head-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.quiz-kp-title { font-size: 17px; font-weight: 700; }

.quiz-kp-head-badges {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.quiz-pill.red { background: rgba(244, 67, 54, 0.15); color: #f44336; }

.quiz-kp-starline { font-size: 13px; color: var(--text-secondary); margin-left: 8px; }
.quiz-kp-stars.imp { color: #ff9800; letter-spacing: 1px; }
.quiz-kp-stars.dif { color: #f44336; letter-spacing: 1px; }

.quiz-kp-statline {
    display: flex;
    gap: 28px;
    font-size: 13px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: 14px;
}

.quiz-kp-statline b { font-size: 15px; color: var(--text-primary); }
.quiz-kp-statline b.ok { color: var(--accent-green); }
.quiz-kp-statline b.bad { color: #ff9800; }

.quiz-kp-study-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 8px;
}

.quiz-kp-path-node {
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: border-color 0.15s;
}

.quiz-kp-path-node:hover { border-color: var(--accent-blue); }

.quiz-kp-path-node.current {
    border-color: var(--accent-blue);
    background: var(--bg-hover);
    cursor: default;
}

.quiz-kp-path-name { flex: 1; font-size: 14px; font-weight: 600; }

.quiz-kp-test-start {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

/* ===== 解题视频弹层 ===== */
.quiz-video-list {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quiz-video-link {
    color: var(--accent-blue);
    font-size: 14px;
    text-decoration: none;
}

.quiz-video-link:hover { text-decoration: underline; }

/* ===== 移动端 ===== */
@media (max-width: 600px) {
    .quiz-body { padding: 12px 10px calc(64px + env(safe-area-inset-bottom, 0px)); }
    .quiz-home-quick { flex-direction: column; }
    .quiz-home-cards { grid-template-columns: 1fr 1fr; }
    .quiz-search .quiz-input { width: 150px; }
    .quiz-kp-name { flex-basis: 90px; }
    /* 窄屏：答题卡收到试卷上方 */
    .quiz-exam-layout { grid-template-columns: 1fr; }
    .quiz-exam-aside { position: static; order: -1; }
    /* 窄屏：智习室行换行排布 */
    .quiz-sr-unit-head, .quiz-sr-kp-head { flex-wrap: wrap; gap: 8px; }
    .quiz-sr-name { flex-basis: 100%; white-space: normal; }
    .quiz-sr-stat { min-width: 0; }
}