:root {
  --navy: #0B2D5C;
  --navy-soft: #14417f;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e3e8ef;
  --text: #14202e;
  --muted: #64748b;
  --accent: #1a6dd8;
  --accent-soft: #e8f1fd;
  --good: #1a7f37;
  --good-soft: #e8f6ed;
  --bad: #c0392b;
  --bad-soft: #fdeceb;
  --warn: #b45309;
  --warn-soft: #fdf3e6;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 32, 56, .06), 0 4px 16px rgba(16, 32, 56, .05);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.err { color: var(--bad); }
code { background: #eef2f7; padding: 1px 5px; border-radius: 4px; font-size: 13px; }

/* ---------- login gate ---------- */
.gate {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #0B2D5C 0%, #14417f 100%);
  z-index: 100;
}
.gate-card {
  background: #fff; padding: 32px 30px; border-radius: 14px; width: min(380px, 92vw);
  box-shadow: 0 20px 60px rgba(0,0,0,.25); text-align: center;
}
.gate-card h1 { margin: 0 0 6px; font-size: 20px; color: var(--navy); }
.gate-card input {
  width: 100%; padding: 11px 12px; margin: 16px 0 10px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 15px;
}
/* contact the admin from the login gate (new code / tech support) */
.gate-support {
  margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--border);
  text-align: center;
}
.gate-support .gs-title { margin: 0 0 4px; font-size: 13px; font-weight: 700; color: var(--navy); }
.gate-support .gs-text { margin: 0 0 10px; font-size: 12.5px; line-height: 1.6; color: var(--muted); }
.gate-support .gs-mail {
  display: inline-block; padding: 7px 16px; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid #cfe1f8; color: var(--navy);
  font-size: 13px; font-weight: 600; text-decoration: none; word-break: break-all;
  transition: background .15s, color .15s, border-color .15s;
}
.gate-support .gs-mail:hover { background: var(--navy); border-color: var(--navy); color: #fff; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  background: var(--navy); color: #fff; padding: 0 20px;
  position: sticky; top: 0; z-index: 40; box-shadow: 0 2px 10px rgba(11, 45, 92, .18);
}
.brand { display: flex; align-items: baseline; gap: 10px; padding: 12px 0; }
.brand .logo { font-weight: 800; font-size: 19px; letter-spacing: .04em; }
.brand .sub { font-size: 12px; opacity: .78; }
.nav { display: flex; gap: 2px; flex: 1; flex-wrap: wrap; }
.nav button {
  background: transparent; border: 0; color: rgba(255,255,255,.82);
  padding: 14px 13px; font-size: 14px; cursor: pointer; border-bottom: 3px solid transparent;
  font-family: inherit;
}
.nav button:hover { color: #fff; background: rgba(255,255,255,.07); }
.nav button.active { color: #fff; border-bottom-color: #7fb3ff; font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.badge {
  background: rgba(255,255,255,.14); border-radius: 20px; padding: 3px 11px;
  font-size: 12px; white-space: nowrap;
}

/* ---------- layout ---------- */
main { max-width: 1180px; margin: 0 auto; padding: 22px 18px 80px; }
.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin-bottom: 18px; box-shadow: var(--shadow);
}
.panel h2 { margin: 0 0 6px; font-size: 17px; color: var(--navy); }
.panel h3 { margin: 22px 0 8px; font-size: 15px; color: var(--navy); }
.panel > p { margin: 0 0 14px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow);
}
.stat .k { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.stat .v { font-size: 27px; font-weight: 700; color: var(--navy); line-height: 1.25; }
.stat .s { font-size: 12px; color: var(--muted); }

.paper-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 14px; }
.paper-card {
  border: 1px solid var(--border); border-radius: 10px; padding: 15px 16px; background: #fbfcfe;
  display: flex; flex-direction: column; gap: 8px;
}
.paper-card h4 { margin: 0; font-size: 15px; color: var(--navy); }
.paper-card .meta { font-size: 12.5px; color: var(--muted); }
.paper-card .rowb { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
/* "✓2 次 · 最好 80%" / "未做" badge under a paper card */
.pbadge { margin-top: 6px; font-size: 12px; font-weight: 600; }
.pbadge.done { color: #1a6d3c; }
.pbadge.todo { color: var(--muted, #8a8578); font-weight: 500; }
/* History rows are clickable — make that obvious. */
tr.hist-row { cursor: pointer; }
tr.hist-row:hover { background: rgba(26, 109, 216, .07); }
.chip.warn { background: #fdf0d5; border-color: #e3b341; color: #7a5a00; }

/* ---------- forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin-bottom: 8px; }
label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; }
label > span { color: var(--muted); font-size: 12.5px; font-weight: 600; }
select, input[type=text], input[type=number], input[type=password], textarea, input.full {
  padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
  background: #fff; color: var(--text); font-family: inherit; width: 100%;
}
select:focus, input:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; line-height: 1.5; }
.block-label { display: block; margin: 14px 0 7px; font-size: 12.5px; font-weight: 600; color: var(--muted); }
.actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.row-gap { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 12px; }
.check { flex-direction: row; align-items: center; gap: 7px; font-size: 13.5px; cursor: pointer; }
.check input { width: 16px; height: 16px; }

/* ---------- buttons ---------- */
.btn {
  background: #fff; border: 1px solid var(--border); color: var(--text);
  padding: 9px 16px; border-radius: 8px; font-size: 14px; cursor: pointer;
  font-family: inherit; font-weight: 500; transition: background .12s, border-color .12s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: #1559b0; border-color: #1559b0; color: #fff; }
.btn.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn.danger:hover { background: #a53024; color: #fff; }
.btn.ghost { background: transparent; }
.btn.tiny { padding: 5px 11px; font-size: 13px; }
.btn.block { width: 100%; margin-top: 6px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.topbar .btn.ghost { border-color: rgba(255,255,255,.4); color: #fff; }
.topbar .btn.ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
/* exam-bar is dark navy: ghost buttons (pause/resume/exit) need light text */
.exam-bar .btn.ghost { border-color: rgba(255,255,255,.55); color: #fff; }
.exam-bar .btn.ghost:hover { background: rgba(255,255,255,.16); border-color: #fff; color: #fff; }

/* ---------- chips ---------- */
.chip-wrap { display: flex; flex-wrap: wrap; gap: 7px; max-height: 190px; overflow-y: auto; padding: 4px 2px; }
.chip {
  border: 1px solid var(--border); border-radius: 16px; padding: 4px 11px; font-size: 12.5px;
  cursor: pointer; background: #fff; user-select: none;
}
.chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--navy); font-weight: 600; }
.topic-chip {
  background: var(--accent-soft); color: var(--navy); border-radius: 5px;
  padding: 2px 9px; font-size: 12px; font-weight: 600;
}

/* ---------- exam ---------- */
.exam-bar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  background: var(--navy); color: #fff; padding: 11px 18px; border-radius: var(--radius);
  margin-bottom: 14px; position: sticky; top: 53px; z-index: 30;
}
.exam-meta { display: flex; align-items: baseline; gap: 10px; flex: 1; min-width: 180px; }
.exam-meta .muted { color: rgba(255,255,255,.75); }
.exam-timer { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .02em; }
.exam-timer.low { color: #ffb4a8; }
.exam-actions { display: flex; gap: 8px; }

.exam-body { display: grid; grid-template-columns: 210px 1fr; gap: 16px; align-items: start; }
.qnav {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; position: sticky; top: 112px; box-shadow: var(--shadow);
}
.qnav h4 { margin: 0 0 10px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.qnav-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.qnav button {
  aspect-ratio: 1; border: 1px solid var(--border); background: #fff; border-radius: 6px;
  cursor: pointer; font-size: 12.5px; color: var(--text); font-family: inherit; padding: 0;
}
.qnav button.answered { background: var(--accent-soft); border-color: #b9d5f7; color: var(--navy); font-weight: 600; }
.qnav button.flagged { border-color: var(--warn); background: var(--warn-soft); }
.qnav button.current { outline: 2px solid var(--accent); outline-offset: 1px; }
.qnav .legend { margin-top: 12px; font-size: 11.5px; color: var(--muted); line-height: 1.7; }

.qcard {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px; box-shadow: var(--shadow);
}
.qhead { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.qno { font-weight: 700; color: var(--navy); font-size: 16px; }
.stem { font-size: 15.5px; line-height: 1.75; margin-bottom: 18px; }
.stem p { margin: 0 0 8px; }
.stem ol, .stem ul { margin: 6px 0; padding-left: 22px; }

.options { display: flex; flex-direction: column; gap: 9px; }
.opt {
  display: flex; gap: 11px; align-items: flex-start; border: 1px solid var(--border);
  border-radius: 9px; padding: 11px 14px; cursor: pointer; background: #fff; text-align: left;
  font-family: inherit; font-size: 15px; color: var(--text); line-height: 1.55;
}
.opt:hover { border-color: var(--accent); background: #fafcff; }
.opt .key {
  font-weight: 700; color: var(--navy); background: #eef2f7; border-radius: 5px;
  min-width: 24px; height: 24px; display: grid; place-items: center; font-size: 13px; flex-shrink: 0;
}
.opt.sel { border-color: var(--accent); background: var(--accent-soft); }
.opt.sel .key { background: var(--accent); color: #fff; }
.opt.correct { border-color: var(--good); background: var(--good-soft); }
.opt.correct .key { background: var(--good); color: #fff; }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt.wrong .key { background: var(--bad); color: #fff; }
.opt.disabled { cursor: default; }
.opt.disabled:hover { border-color: var(--border); background: inherit; }

.qfoot { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; }

.feedback {
  margin-top: 18px; border-radius: 9px; padding: 14px 16px; border: 1px solid var(--border);
  background: #fbfcfe; font-size: 14px;
}
.feedback.good { border-color: var(--good); background: var(--good-soft); }
.feedback.bad { border-color: var(--bad); background: var(--bad-soft); }
.feedback h5 { margin: 0 0 8px; font-size: 14px; }
.feedback .sol { white-space: pre-wrap; line-height: 1.7; }
.feedback .note {
  margin-top: 10px; padding: 9px 12px; background: var(--warn-soft); border-left: 3px solid var(--warn);
  border-radius: 0 6px 6px 0; font-size: 13.5px;
}

/* ---------- report ---------- */
.report-head {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: #fff; border-radius: var(--radius); padding: 26px; margin-bottom: 16px;
}
.report-head h2 { margin: 0 0 4px; color: #fff; font-size: 20px; }
.report-head .big { font-size: 46px; font-weight: 800; line-height: 1.1; }
.report-head .band { font-size: 14px; opacity: .92; }
.report-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-top: 18px; }
.report-grid .cell { background: rgba(255,255,255,.13); border-radius: 9px; padding: 12px 14px; }
.report-grid .k { font-size: 11.5px; opacity: .82; text-transform: uppercase; letter-spacing: .05em; }
.report-grid .v { font-size: 21px; font-weight: 700; }

.review-item { border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; margin-bottom: 12px; background: #fff; }
.review-item.wrong { border-left: 4px solid var(--bad); }
.review-item.right { border-left: 4px solid var(--good); }
.review-item.skipped, .review-item.nokey { border-left: 4px solid #9aa6b8; }
.review-item.skipped .rhead .tag, .review-item.nokey .rhead .tag { background: #eceff3; color: #5b6779; }
.review-item .rhead { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.review-item .rhead .tag { font-size: 12px; font-weight: 700; padding: 2px 9px; border-radius: 5px; }
.review-item.wrong .rhead .tag { background: var(--bad-soft); color: var(--bad); }
.review-item.right .rhead .tag { background: var(--good-soft); color: var(--good); }
.answer-row { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13.5px; margin: 10px 0; }
.answer-row b { color: var(--navy); }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 14px; }
th {
  background: var(--navy); color: #fff; font-weight: 700; text-align: left;
  padding: 11px 13px; font-size: 13px; white-space: nowrap;
}
td { padding: 10px 13px; border-bottom: 1px solid var(--border); color: #000; }
tbody tr:nth-child(even) { background: #fafbfd; }
tbody tr:hover { background: var(--accent-soft); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.bar { height: 8px; background: #e8edf4; border-radius: 5px; overflow: hidden; min-width: 70px; }
.bar > i { display: block; height: 100%; background: var(--accent); }
.bar.good > i { background: var(--good); }
.bar.warn > i { background: var(--warn); }
.bar.bad > i { background: var(--bad); }

/* ---------- wrong book ---------- */
.wb-list { margin-top: 14px; }
.wb-item { border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; margin-bottom: 10px; background: #fff; }
.wb-item .head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.wb-item .stem-preview { font-size: 14px; color: var(--muted); }
.wb-item.mastered { opacity: .62; }

/* ---------- drop zone ---------- */
.drop {
  border: 2px dashed #c7d3e3; border-radius: 10px; padding: 22px; text-align: center;
  color: var(--muted); cursor: pointer; margin-bottom: 12px; background: #fbfcfe;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); color: var(--navy); }
.warn { background: var(--warn-soft); border: 1px solid var(--warn); border-radius: 8px; padding: 11px 14px; margin-top: 12px; font-size: 13.5px; }

/* ---------- toast ---------- */
.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%);
  background: var(--navy); color: #fff; padding: 11px 20px; border-radius: 8px;
  box-shadow: 0 8px 26px rgba(0,0,0,.22); z-index: 90; font-size: 14px; max-width: 88vw;
}

/* ---------- KaTeX ---------- */
.katex { font-size: 1.03em; }
.stem .katex-display { margin: 10px 0; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .exam-body { grid-template-columns: 1fr; }
  .qnav { position: static; order: 2; }
  .qcard { order: 1; }
  .qnav-grid { grid-template-columns: repeat(9, 1fr); }
  .exam-bar { top: 0; }
}
@media (max-width: 620px) {
  .brand .sub { display: none; }
  .nav button { padding: 12px 9px; font-size: 13px; }
  main { padding: 16px 12px 60px; }
  .qcard { padding: 18px 16px; }
  .report-head .big { font-size: 36px; }
}

/* ---------- timers: pause / overtime ---------- */
.exam-timer.paused { color: #ffd479; }
.exam-timer.paused::after { content: ' ⏸'; font-size: 15px; }
.exam-timer.over { color: #ff9a8b; }
.report-grid .v.over { color: #ffb4a8; }

/* ---------- pause overlay (practice) ---------- */
.qcard { position: relative; }
.pause-mask {
  position: absolute; inset: 0; z-index: 6;
  background: rgba(244, 246, 249, .96);
  border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; text-align: center; padding: 24px;
}
.pause-mask .pm-title { font-size: 22px; font-weight: 800; color: var(--navy); }
.pause-mask .pm-sub { font-size: 13.5px; color: var(--muted); max-width: 420px; }

/* ---------- review: jump bar ---------- */
.jumpbar {
  border: 1px solid var(--border); border-radius: 9px; padding: 12px 14px;
  background: #fbfcfe; margin-bottom: 12px;
}
.jump-head { display: flex; gap: 10px; align-items: baseline; margin-bottom: 8px; }
.jump-head b { color: var(--navy); font-size: 13.5px; }
.jump-head .muted { font-size: 12px; }
.jump-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-top: 6px; }
.jump-label { font-size: 12.5px; font-weight: 700; padding: 2px 9px; border-radius: 5px; margin-right: 4px; }
.jump-label.bad { background: var(--bad-soft); color: var(--bad); }
.jump-label.grey { background: #eceff3; color: #5b6779; }
.jump-label.ok { background: var(--good-soft); color: var(--good); padding: 2px 0; }
.jump-btn {
  min-width: 34px; height: 30px; padding: 0 9px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--border); background: #fff; font-family: inherit;
  font-size: 13px; font-weight: 600; color: var(--text);
}
.jump-btn.bad { border-color: #f0c3bd; background: var(--bad-soft); color: var(--bad); }
.jump-btn.warn { border-color: #eed3ae; background: var(--warn-soft); color: var(--warn); }
.jump-btn.grey { border-color: #dfe4ea; background: #f3f5f8; color: #5b6779; }
.jump-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- review: per-question ---------- */
.review-opts { margin: 12px 0 4px; }
.review-opts .opt { padding: 8px 12px; font-size: 14px; cursor: default; }
.review-opts .opt.disabled:hover { border-color: var(--border); background: #fff; }
.review-opts .opt.correct { border-color: var(--good); background: var(--good-soft); }
.review-opts .opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.answer-row .right-ans { color: var(--good); font-weight: 600; }
.feedback.nosol { border-style: dashed; background: #fbfcfe; }
.feedback.nosol h5 { color: var(--muted); }
.feedback.nosol .note { background: #f3f5f8; border-left-color: #b6c0cd; color: var(--muted); }

@keyframes flash-target {
  0%   { box-shadow: 0 0 0 0 rgba(26, 109, 216, .55); background: var(--accent-soft); }
  100% { box-shadow: 0 0 0 10px rgba(26, 109, 216, 0); background: #fff; }
}
.review-item.flash { animation: flash-target 1.5s ease-out; }

/* ---------- question images (scanned originals) ---------- */
.q-img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 10px auto 6px;
  border: 1px solid var(--bd, #d8d5cb);
  border-radius: 8px;
  background: #fff;
  cursor: zoom-in;
}
.q-img:active { cursor: zoom-out; }
.q-img.zoomed {
  max-width: none;
  width: 170%;
  margin-left: -35%;
}

/* ---- question feedback (⚠ report button + panel + triage list) ---- */
.report-panel {
  margin: 8px 0 4px; padding: 10px;
  border: 1px solid #f0c3bd; border-radius: 10px; background: #fff8f6;
}
.report-panel textarea {
  width: 100%; box-sizing: border-box; resize: vertical;
  font: inherit; font-size: 13.5px; padding: 8px 10px;
  border: 1px solid #e2c8c2; border-radius: 8px; background: #fff; color: #22314e;
}
.report-actions { display: flex; gap: 8px; margin-top: 8px; }
.user-row {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 12px; margin-top: 10px;
  border: 1px solid var(--line, #e2e7ef); border-radius: 10px; background: #fff;
}
.user-row.off { opacity: .62; background: #fafbfd; }
.fb-msg { font-size: 14px; color: #22314e; white-space: pre-wrap; }
.fb-meta { font-size: 12px; margin-top: 4px; }
.fb-ops { display: flex; gap: 8px; margin-top: 8px; align-items: center; }
.fb-note-wrap { display: flex; gap: 8px; align-items: center; margin-top: 6px; flex: 1 1 260px; }
.fb-note {
  flex: 1 1 200px; min-width: 160px; font: inherit; font-size: 13px;
  padding: 6px 9px; border: 1px solid var(--line, #e2e7ef); border-radius: 8px;
  background: #fff; color: #22314e;
}
.fb-note[readonly] { background: #fafbfd; color: #5b6779; }
.fb-note-saved { font-size: 12px; }
.fb-note-box {
  font-size: 13.5px; color: var(--navy, #0b2d5c); margin-top: 6px; padding: 8px 10px;
  border-left: 3px solid #2e9e6b; background: #f2fbf6; border-radius: 0 8px 8px 0;
  white-space: pre-wrap; width: 100%;
}
.chip.ok { background: #e8f7f0; border-color: #b6e2cc; color: #1f7a55; font-weight: 600; }

/* ---- user admin (access codes) ---- */
.u-main { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.u-code { font-size: 14px; font-weight: 600; letter-spacing: .3px; }
.u-name { font-size: 14px; color: #22314e; }
.u-stats { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: #5b6779; }
.u-stats b { color: #22314e; }
.chip.admin { background: #eef2fb; border-color: #c6d2ec; color: #2b4a86; font-weight: 600; }

/* ---- changelog / release notes ---- */
.cl-entry {
  padding: 12px 14px; margin-top: 12px;
  border: 1px solid var(--line, #e2e7ef); border-radius: 10px; background: #fff;
}
.cl-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.cl-head h3 { margin: 0; font-size: 15.5px; font-weight: 600; }
.cl-head .chip { flex: 0 0 auto; }
.cl-date { margin-left: auto; font-size: 12.5px; }
.cl-items { margin: 8px 0 0; padding-left: 20px; }
.cl-items li { font-size: 13.5px; line-height: 1.7; color: #22314e; }
#cl-admin-panel textarea {
  width: 100%; box-sizing: border-box; resize: vertical; margin-top: 8px;
  font: inherit; font-size: 13.5px; padding: 8px 10px;
  border: 1px solid var(--line, #e2e7ef); border-radius: 8px; background: #fff; color: #22314e;
}
#cl-admin-panel select, #cl-admin-panel input[type="date"] {
  font: inherit; font-size: 13.5px; padding: 6px 9px;
  border: 1px solid var(--line, #e2e7ef); border-radius: 8px; background: #fff; color: #22314e;
}

/* ---- 学情诊断 / learning diagnosis (insights) ---- */
.ins-panel { border-left: 3px solid var(--accent); }
.ins-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.ins-head h2 { margin-bottom: 0; }
.ins-narrative {
  margin: 12px 0 4px; padding: 12px 14px;
  background: var(--accent-soft); border-radius: 10px;
  font-size: 14.5px; line-height: 1.75; color: #1b2a44;
}
.ins-metrics {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
  gap: 10px; margin: 14px 0 4px;
}
.ins-metric {
  background: #f7f9fc; border: 1px solid var(--border); border-radius: 10px;
  padding: 9px 10px; text-align: center;
}
.ins-mv { display: block; font-size: 19px; font-weight: 700; color: var(--navy); }
.ins-unit { font-size: 12px; font-weight: 600; color: var(--muted); }
.ins-ml { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }
.ins-awards { margin-top: 14px; }
.ins-awards-h { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.ins-award {
  display: flex; justify-content: space-between; gap: 10px;
  padding: 6px 10px; border-radius: 8px; font-size: 13.5px; margin-bottom: 4px;
  background: #f7f9fc; border: 1px solid var(--border);
}
.ins-award.ok { background: var(--good-soft); border-color: #cfe9d8; color: #14622c; }
.ins-award.warn { background: var(--warn-soft); border-color: #f0d9a8; color: #7c4a03; }
.ins-award.muted { color: var(--muted); }
.ins-signals { list-style: none; margin: 12px 0 0; padding: 0; }
.ins-signals li {
  position: relative; padding: 5px 0 5px 18px; font-size: 14px; line-height: 1.6; color: #22314e;
}
.ins-dot {
  position: absolute; left: 0; top: 11px; width: 8px; height: 8px;
  border-radius: 50%; background: #94a3b8;
}
.ins-dot.warn { background: var(--bad); }
.ins-dot.good { background: var(--good); }
.ins-dot.info { background: var(--accent); }
.ins-advice { margin: 12px 0 0; padding-left: 20px; }
.ins-advice li { margin-bottom: 8px; font-size: 14px; line-height: 1.7; color: #22314e; }
.ins-stall {
  margin-top: 12px; padding: 8px 12px; font-size: 13.5px;
  background: var(--warn-soft); border: 1px solid #f0d9a8; border-radius: 8px; color: #7c4a03;
}
.ins-reddot {
  display: inline-block; width: 8px; height: 8px; margin-left: 6px;
  border-radius: 50%; background: var(--bad); vertical-align: middle;
}
@media (max-width: 640px) {
  .ins-metrics { grid-template-columns: repeat(3, 1fr); }
}