:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #111111;
  --muted: #667085;
  --border: #e4e7ec;
  --primary: #1a56db;
  --primary-dark: #14409b;
  --record: #b42318;
  --ok: #027a48;
  --err: #b42318;
  --warn: #b54708;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
[hidden] { display: none !important; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  background: #0f172a;
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.topbar .brand { font-size: 18px; font-weight: 700; }
.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav-item {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 14px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
}
.nav-item.active { background: rgba(255,255,255,.14); color: #fff; }
.nav-item:hover { color: #fff; }
.version { font-size: 11px; color: #7dd3fc; font-variant-numeric: tabular-nums; }
.logout-btn { margin-left: auto; }
.logout-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,.35);
  color: #cbd5e1;
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 12px;
  cursor: pointer;
}
.logout-btn:hover { background: rgba(255,255,255,.12); color: #fff; }

/* ---------- 访问密码门 ---------- */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 24px;
}
.auth-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px 28px;
  width: 100%;
  max-width: 340px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
.auth-brand { font-size: 24px; font-weight: 700; margin-bottom: 6px; }
.auth-sub { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.auth-input {
  width: 100%;
  padding: 13px 14px;
  font-size: 20px;
  letter-spacing: 6px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  font-variant-numeric: tabular-nums;
}
.auth-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,.12); }
.auth-error { min-height: 20px; font-size: 13px; color: var(--err); margin: 8px 0 4px; }
.auth-btn { width: 100%; padding: 13px; margin-top: 8px; }

.container { max-width: 860px; margin: 0 auto; padding: 16px; }
.view { display: none; }
.view.active { display: block; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; margin-bottom: 16px; }
.section-title { margin: 0 0 12px; font-size: 16px; font-weight: 700; }

.btn {
  display: inline-block;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 11px 18px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: #fff; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: #f2f4f7; }

.dz-hint { font-size: 12px; color: var(--muted); margin-top: 8px; }

.upload-progress { margin-top: 14px; }
.bar { height: 8px; background: #e4e7ec; border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--primary); transition: width .2s; }
.bar-text { font-size: 12px; color: var(--muted); margin-top: 6px; }

/* ---------- 录音器 ---------- */
.recorder { text-align: center; padding: 8px 0; }
.rec-status { font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.rec-timer { font-size: 34px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: 1px; margin: 4px 0 10px; }
.rec-controls { display: flex; align-items: center; justify-content: center; gap: 28px; }
.rec-main {
  width: 76px; height: 76px;
  border-radius: 50%;
  border: 2px solid var(--record);
  background: #fff;
  color: var(--record);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  padding: 0;
}
.rec-main:active { background: #fdeceb; }
.rec-main.recording { background: #fdeceb; }
.rec-stop {
  width: 52px; height: 52px;
  border-radius: 14px;
  border: 2px solid #111;
  background: #fff;
  color: #111;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  padding: 0;
}
.rec-stop:disabled { opacity: 0.3; cursor: default; }

/* ---------- 任务列表 ---------- */
.empty { color: var(--muted); text-align: center; padding: 24px 0; }
.job-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; cursor: pointer;
}
.job-item:hover { background: #fafbfc; }
.job-main { flex: 1; min-width: 0; }
.job-name { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.job-meta { font-size: 12px; color: var(--muted); }
.badge { font-size: 12px; padding: 2px 10px; border-radius: 20px; white-space: nowrap; font-weight: 600; }
.badge.queued, .badge.transcribing, .badge.extracting, .badge.generating, .badge.rendering, .badge.transcribed, .badge.knowledge_ready { background: #fff4e5; color: var(--warn); }
.badge.done { background: #e7f7ef; color: var(--ok); }
.badge.error { background: #fdeceb; color: var(--err); }

/* ---------- 详情 ---------- */
.detail-head { display: flex; align-items: center; justify-content: space-between; }
.status-line { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.status-line.error { color: var(--err); }
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 12px; }
.tab { border: none; background: none; padding: 9px 14px; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.content-box {
  background: #fafafa; border: 1px solid var(--border); border-radius: 8px; padding: 14px;
  max-height: 60vh; overflow: auto; white-space: pre-wrap; word-break: break-word; font-size: 14px; font-family: inherit; margin: 0;
}
.content-box.md { white-space: normal; }
.md h1, .md h2, .md h3 { margin: 14px 0 6px; font-size: 15px; }
.md h2 { border-left: 4px solid var(--primary); padding-left: 8px; }
.md ul { margin: 4px 0; padding-left: 20px; }
.md li { margin: 3px 0; }
.md p { margin: 6px 0; }
.md strong { font-weight: 700; }

.exam-toolbar { display: flex; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.exam-frame { width: 100%; height: 70vh; border: 1px solid var(--border); border-radius: 8px; background: #fff; }

/* ---------- 详情操作栏 ---------- */
.detail-actions { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.detail-actions:empty { display: none; }

/* ---------- 小按钮 / 图标按钮 ---------- */
.btn-small { padding: 6px 12px; font-size: 13px; border-radius: 7px; }
.icon-btn { background: transparent; border: none; font-size: 18px; cursor: pointer; padding: 4px 6px; border-radius: 6px; line-height: 1; }
.icon-btn:hover { background: #f2f4f7; }
.del-btn { color: #98a2b3; }
.del-btn:hover { color: var(--err); }
.restore-btn { color: var(--ok); }
.purge-btn { color: var(--err); }

/* ---------- 知识库 / 复习 ---------- */
.kb-summary { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.kb-item { border: 1px solid var(--border); border-radius: 10px; padding: 12px; margin-bottom: 10px; }
.kb-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.kb-score { font-size: 16px; font-weight: 700; color: var(--primary); font-variant-numeric: tabular-nums; }
.kb-cat { font-size: 12px; padding: 2px 8px; border-radius: 20px; font-weight: 600; }
.cat-mental_health { background: #fde7ef; color: #c026d3; }
.cat-physical_health { background: #e7f7ef; color: var(--ok); }
.cat-professional { background: #e7f0fd; color: var(--primary); }
.cat-other { background: #f2f4f7; color: var(--muted); }
.kb-pri { font-size: 12px; color: var(--muted); }
.kb-text { font-size: 14px; margin-bottom: 6px; }
.kb-meta { font-size: 12px; color: var(--muted); display: flex; gap: 12px; margin-bottom: 8px; }
.kb-meta .ok { color: var(--ok); }
.kb-meta .err { color: var(--err); }
.kb-actions { display: flex; gap: 8px; }
.ok-btn { background: #e7f7ef; color: var(--ok); border-color: transparent; }
.ok-btn:hover { background: #d0f0df; }
.err-btn { background: #fdeceb; color: var(--err); border-color: transparent; }
.err-btn:hover { background: #fbdcd9; }

/* ---------- 复习试卷列表 ---------- */
.review-exam-item { display: flex; align-items: center; gap: 8px; padding: 12px; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.review-exam-item .job-main { flex: 1; min-width: 0; }
.gen-status { font-size: 13px; color: var(--warn); margin-bottom: 12px; }

/* ---------- 标记错题弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15,23,42,.5);
  display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 20px;
}
.modal-card {
  background: #fff; border-radius: 14px; width: 100%; max-width: 480px;
  max-height: 82vh; display: flex; flex-direction: column; box-shadow: 0 20px 50px rgba(0,0,0,.3);
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.modal-title { font-size: 16px; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--muted); line-height: 1; padding: 2px 6px; border-radius: 6px; }
.modal-close:hover { background: #f2f4f7; }
.modal-body { padding: 16px 18px; overflow: auto; }
.modal-foot { display: flex; gap: 10px; padding: 14px 18px; border-top: 1px solid var(--border); }
.modal-foot .btn { flex: 1; }
.mark-group { margin-bottom: 14px; }
.mark-group-label { font-size: 13px; font-weight: 700; color: var(--muted); margin-bottom: 8px; }
.mark-nums { display: flex; flex-wrap: wrap; gap: 8px; }
.mark-num {
  width: 38px; height: 38px; border-radius: 8px; border: 1px solid var(--border);
  background: #fff; color: var(--text); font-size: 15px; font-weight: 600; cursor: pointer; padding: 0;
}
.mark-num:hover { border-color: var(--primary); }
.mark-num.selected { background: var(--err); color: #fff; border-color: var(--err); }

/* ---------- 手机端 ---------- */
@media (max-width: 600px) {
  body { font-size: 15px; }
  .container { padding: 10px; }
  .card { padding: 14px; border-radius: 10px; }
  .topbar { padding: 12px 14px; }
  .btn { width: 100%; text-align: center; }
  .exam-toolbar .btn { width: 100%; }
  .content-box { max-height: 55vh; }
  .exam-frame { height: 60vh; }
}

/* 墨水屏（高对比、去动画） */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}