:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #f0f3f9;
  --border: #dde3ee;
  --text: #182033;
  --muted: #5d6880;
  --accent: #2f5bea;
  --accent-soft: #e6edff;
  --good: #1a8a52;
  --good-soft: #e3f5eb;
  --bad: #c9372c;
  --bad-soft: #fbe7e5;
  --warn: #b26a00;
  --warn-soft: #fff3dc;
  --review: #6b3fd4;
  --maths: #2f5bea;
  --physics: #0f8a8a;
  --chemistry: #c4561d;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f131c; --surface: #171c27; --surface-2: #1e2532; --border: #2c3445; --text: #e7ebf3;
    --muted: #9aa5ba; --accent: #6d8fff; --accent-soft: #1f2a4a; --good: #4cc489; --good-soft: #15301f;
    --bad: #ff7b6e; --bad-soft: #3a1c1a; --warn: #f0b04a; --warn-soft: #3a2c12; --review: #a98bff;
    --maths: #6d8fff; --physics: #38c2c2; --chemistry: #f08a52; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f131c; --surface: #171c27; --surface-2: #1e2532; --border: #2c3445; --text: #e7ebf3;
  --muted: #9aa5ba; --accent: #6d8fff; --accent-soft: #1f2a4a; --good: #4cc489; --good-soft: #15301f;
  --bad: #ff7b6e; --bad-soft: #3a1c1a; --warn: #f0b04a; --warn-soft: #3a2c12; --review: #a98bff;
  --maths: #6d8fff; --physics: #38c2c2; --chemistry: #f08a52; color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 Inter, system-ui, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .4em; }
h1 { font-size: 1.7rem; }
h2 { font-size: 1.2rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

/* ---------- top bar */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 24px;
  background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 26px; height: 26px; flex: none; color: var(--accent); }
.brand-name { font-size: 18px; font-weight: 700; line-height: 1; }
.brand-sub { font-size: .8rem; font-weight: 600; color: var(--muted); padding-left: 9px; border-left: 1px solid var(--border); }
.topbar nav { display: flex; gap: 18px; font-weight: 500; }
.topbar nav a { color: var(--muted); }
.topbar nav a:hover { color: var(--text); text-decoration: none; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* ---------- buttons & controls */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 16px;
  border-radius: 9px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.primary:disabled { opacity: .5; cursor: not-allowed; filter: none; }
.btn.small { padding: 5px 10px; font-size: .82rem; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { color: var(--text); background: var(--surface-2); }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); cursor: pointer; font-weight: 500; user-select: none; }
.chip input { accent-color: var(--accent); margin: 0; }
.chip:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: .75rem; font-weight: 600;
  background: var(--surface-2); color: var(--muted); }
.badge.good { background: var(--good-soft); color: var(--good); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.notice { padding: 12px 16px; border-radius: 10px; background: var(--warn-soft); color: var(--warn); margin: 12px 0; }
.notice.info { background: var(--accent-soft); color: var(--accent); }

/* ---------- builder */
.hero { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; margin-bottom: 20px; }
.hero p { margin: 0; color: var(--muted); max-width: 640px; }
.builder { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: start; }
.subject-tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.subject-tab { padding: 8px 16px; border-radius: 9px; border: 1px solid var(--border); background: var(--surface);
  font: inherit; font-weight: 600; cursor: pointer; color: var(--muted); display: flex; gap: 8px; align-items: center; }
.subject-tab.active { color: var(--text); border-color: var(--text); }
.subject-tab .dot { width: 9px; height: 9px; border-radius: 50%; }
.toolbar { display: flex; gap: 8px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 10px; }
.search { flex: 1; min-width: 200px; padding: 9px 12px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; }
.chapter { border-bottom: 1px solid var(--border); }
.chapter:last-child { border-bottom: 0; }
.chapter-head { display: flex; align-items: center; gap: 10px; padding: 12px 16px; cursor: pointer; }
.chapter-head:hover { background: var(--surface-2); }
.chapter-head input, .subtopic input { width: 17px; height: 17px; accent-color: var(--accent); flex: none; cursor: pointer; }
.chapter-name { flex: 1; font-weight: 600; }
.chapter.removed .chapter-name { color: var(--muted); font-style: italic; }
.caret { color: var(--muted); transition: transform .15s; font-size: .8rem; }
.chapter.open .caret { transform: rotate(90deg); }
.subtopics { display: none; padding: 0 16px 12px 44px; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 4px 16px; }
.chapter.open .subtopics { display: grid; }
.subtopic { display: flex; gap: 8px; align-items: center; padding: 4px 0; cursor: pointer; }
.subtopic span { flex: 1; }
.subtopic.empty { opacity: .45; }
.counts { color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.side { position: sticky; top: 76px; display: flex; flex-direction: column; gap: 16px; }
.side .card { padding: 16px; }
.side h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: 10px; }
.filter-row { display: flex; flex-wrap: wrap; gap: 6px; }
.switch { display: flex; gap: 8px; align-items: center; margin-top: 10px; font-size: .9rem; cursor: pointer; }
.pool-row { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: center; padding: 6px 0;
  border-bottom: 1px dashed var(--border); font-size: .9rem; }
.pool-row:last-of-type { border-bottom: 0; }
.pool-row b { font-weight: 600; }
.pool-total { margin: 12px 0; font-size: .9rem; }

/* ---------- builder modes and previous year papers */
[data-mode-panel][hidden] { display: none; }
.mode-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 20px; }
.mode-tab { display: flex; flex-direction: column; gap: 2px; text-align: left; padding: 14px 18px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; cursor: pointer; box-shadow: var(--shadow); }
.mode-tab span { color: var(--muted); font-size: .85rem; }
.mode-tab:hover { border-color: var(--accent); }
.mode-tab.active { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.mode-tab.active b { color: var(--accent); }
.complete-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.complete-row .btn { border-color: var(--accent); color: var(--accent); }
.past-pick { padding: 18px; }
.past-pick h3, .past-detail h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 10px; }
.past-pick h3 + .filter-row { margin-bottom: 20px; }
.past-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.past-item { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; cursor: pointer; text-align: left; }
.past-item:hover { border-color: var(--accent); }
.past-item.sel { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); background: var(--accent-soft); }
.past-item > span:not(.past-status) { color: var(--muted); font-size: .85rem; }
.past-status { margin-top: 4px; font-size: .78rem; font-weight: 600; color: var(--muted); }
.past-status.done { color: var(--good); }
.past-status.prog { color: var(--warn); }
.past-detail { display: flex; flex-direction: column; gap: 10px; }
.past-detail p { margin: 0; }
.past-title { font-size: 1.1rem; margin: 0; }
.past-done { padding: 12px 14px; border-radius: 10px; background: var(--good-soft); color: var(--text); font-size: .92rem; }
.past-done b:first-child { display: block; color: var(--good); margin-bottom: 2px; }
.num-limit { margin: 12px 0 0; padding: 10px 12px; border-radius: 9px; background: var(--warn-soft); color: var(--warn); font-size: .9rem; }
@media (max-width: 600px) {
  .mode-tabs { grid-template-columns: 1fr; gap: 8px; }
  .mode-tab { padding: 12px 14px; }
  .past-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- paper overview */
.overview { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: start; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin: 16px 0; }
.stat { padding: 14px 16px; }
.stat .v { font-size: 1.5rem; font-weight: 700; }
.stat .l { color: var(--muted); font-size: .82rem; }
.breakdown { padding: 16px 20px; margin-bottom: 16px; }
.breakdown ul { margin: 6px 0 0; padding-left: 18px; columns: 2; column-gap: 32px; }
.breakdown li { break-inside: avoid; font-size: .9rem; }
.actions { display: flex; flex-direction: column; gap: 10px; padding: 16px; }
table.list { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.list th, table.list td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
table.list th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
table.list td.num, table.list th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- CBT test */
body.cbt { height: 100vh; display: flex; flex-direction: column; overflow: hidden; }
.cbt-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 20px;
  background: var(--surface); border-bottom: 1px solid var(--border); }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 1.15rem; padding: 6px 14px;
  border-radius: 8px; background: var(--surface-2); }
.timer.low { background: var(--bad-soft); color: var(--bad); }
.cbt-main { flex: 1; display: grid; grid-template-columns: minmax(0, 1fr) 300px; min-height: 0; }
.qpane { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--border); }
.cbt-tabs { display: flex; gap: 4px; padding: 10px 20px 0; background: var(--surface); border-bottom: 1px solid var(--border); }
.cbt-tab { padding: 8px 16px; border: 1px solid transparent; border-bottom: 0; border-radius: 8px 8px 0 0;
  background: none; font: inherit; font-weight: 600; color: var(--muted); cursor: pointer; }
.cbt-tab.active { background: var(--bg); border-color: var(--border); color: var(--text); margin-bottom: -1px; }
.qhead { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 20px; flex-wrap: wrap; }
.qhead .qnum { font-weight: 700; font-size: 1.05rem; }
.qbody { flex: 1; overflow: auto; padding: 4px 20px 20px; }
.qimg { max-width: 100%; height: auto; background: #fff; border-radius: 8px; border: 1px solid var(--border); padding: 8px; }
.options { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.opt { display: flex; align-items: center; gap: 10px; padding: 10px 18px; border-radius: 10px; border: 1.5px solid var(--border);
  background: var(--surface); cursor: pointer; font-weight: 600; min-width: 92px; }
.opt input { accent-color: var(--accent); width: 18px; height: 18px; margin: 0; }
.opt:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.numeric { margin-top: 16px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.numeric input { font: inherit; font-size: 1.1rem; padding: 10px 14px; width: 200px; border-radius: 10px;
  border: 1.5px solid var(--border); background: var(--surface); color: var(--text); }
.qactions { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; padding: 12px 20px;
  background: var(--surface); border-top: 1px solid var(--border); }
.qactions .group { display: flex; gap: 8px; flex-wrap: wrap; }
.btn.save { background: var(--good); border-color: var(--good); color: #fff; }
.btn.mark { background: var(--review); border-color: var(--review); color: #fff; }
.btn.savemark { background: var(--warn); border-color: var(--warn); color: #fff; }
.palette { overflow: auto; padding: 16px; background: var(--surface); }
.legend { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: .78rem; margin-bottom: 16px; }
.legend div { display: flex; align-items: center; gap: 6px; }
.legend .pal { width: 26px; height: 26px; font-size: .75rem; flex: none; }
.pal-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.pal { aspect-ratio: 1; border-radius: 8px; display: grid; place-items: center; font-weight: 600; font-size: .85rem;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text); cursor: pointer; position: relative; }
.pal.notanswered { background: var(--bad); border-color: var(--bad); color: #fff; }
.pal.answered { background: var(--good); border-color: var(--good); color: #fff; }
.pal.marked { background: var(--review); border-color: var(--review); color: #fff; border-radius: 50%; }
.pal.answeredmarked { background: var(--review); border-color: var(--review); color: #fff; border-radius: 50%; }
.pal.answeredmarked::after { content: ""; position: absolute; right: -2px; bottom: -2px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--good); border: 2px solid var(--surface); }
.pal.current { outline: 3px solid var(--text); outline-offset: 2px; }
.section-label { font-size: .78rem; font-weight: 600; color: var(--muted); text-transform: uppercase;
  letter-spacing: .05em; margin: 14px 0 8px; }

.modal-back { position: fixed; inset: 0; background: rgba(10, 14, 24, .55); display: none; place-items: center; z-index: 50; padding: 16px; }
.modal-back.show { display: grid; }
.modal { max-width: 520px; width: 100%; padding: 24px; }
.modal .row { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ---------- result */
.score-hero { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; padding: 24px; margin-bottom: 20px; align-items: center; }
.score-big { text-align: center; }
.score-big .v { font-size: 3rem; font-weight: 700; line-height: 1; }
.score-big .l { color: var(--muted); margin-top: 6px; }
.subj-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.subj-card { padding: 14px 16px; border-left: 4px solid var(--border); }
.subj-card .v { font-size: 1.4rem; font-weight: 700; }
.bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; display: flex; margin-top: 8px; }
.bar i { display: block; height: 100%; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; }
.review-card { padding: 16px 20px; margin-bottom: 14px; border-left: 4px solid var(--border); }
.review-card.correct { border-left-color: var(--good); }
.review-card.wrong { border-left-color: var(--bad); }
.review-head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }
.review-meta { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 10px; font-size: .9rem; }
.review-meta b { font-weight: 600; }

.subj-maths { --subj: var(--maths); }
.subj-physics { --subj: var(--physics); }
.subj-chemistry { --subj: var(--chemistry); }
.subj-card, .review-card.skipped { border-left-color: var(--subj, var(--border)); }

@media (max-width: 900px) {
  .builder, .overview { grid-template-columns: 1fr; }
  .side { position: static; }
  .cbt-main { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .palette { max-height: 34vh; border-top: 1px solid var(--border); }
  .score-hero { grid-template-columns: 1fr; }
  .breakdown ul { columns: 1; }
}
@media (max-width: 600px) {
  .wrap { padding: 16px; }
  .topbar { padding: 10px 16px; }
  .topbar nav { gap: 12px; font-size: .9rem; }
  .qhead, .qbody, .qactions { padding-left: 16px; padding-right: 16px; }
  .subtopics { padding-left: 16px; grid-template-columns: 1fr; }
}

/* ---------- student (phone number, no login) */
.topbar nav { align-items: center; }
.who { display: flex; align-items: center; gap: 6px; margin: 0 0 0 6px; padding-left: 14px; border-left: 1px solid var(--border); }
.who-name { font-weight: 600; color: var(--text); max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.student-wrap { max-width: 460px; padding-top: 8vh; }
.student-card { padding: 28px; }
.student-card h1 { font-size: 1.45rem; }
.sign-in-lead { margin: 4px 0 8px; font-weight: 600; color: var(--accent); }
.field { display: flex; flex-direction: column; gap: 6px; margin: 18px 0 6px; font-weight: 500; }
.field input { font: inherit; padding: 10px 12px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); }
.class-pick { border: 0; padding: 0; min-width: 0; }
.class-pick legend { padding: 0; margin-bottom: 6px; }
.class-options { display: flex; gap: 10px; }
.class-option { flex: 1; cursor: pointer; position: relative; }
.class-option input { position: absolute; opacity: 0; inset: 0; }
.class-option span { display: block; text-align: center; padding: 10px 12px; border-radius: 9px; font-weight: 600;
  border: 1px solid var(--border); }
.class-option input:checked + span { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.class-option input:focus-visible + span { outline: 2px solid var(--accent); }
.field input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.student-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.google-btn { display: flex; justify-content: center; min-height: 44px; margin-top: 22px; }
@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; padding: 10px 16px; }
  .topbar nav { gap: 12px; flex-wrap: wrap; }
  .student-wrap { padding: 16px; padding-top: 4vh; }
}

@media (max-width: 420px) { .topbar .brand-sub { display: none; } }

/* ---------- tests in progress (base.html banner, paper.html note, test.html) */
.resume-banner { background: var(--accent-soft); border-bottom: 1px solid var(--border); padding: 10px 24px; }
.resume-item { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; max-width: 1200px; margin: 0 auto; color: var(--text); font-size: .92rem; }
.resume-item + .resume-item { margin-top: 8px; }
.resume-item > span:nth-child(2) { flex: 1; min-width: 200px; }
.resume-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--good); flex: none; animation: resume-pulse 1.6s infinite; }
.resume-item.late .resume-dot { background: var(--warn); animation: none; }
@keyframes resume-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.resume-note { background: var(--good-soft); color: var(--text); border-radius: 10px; padding: 10px 12px; font-size: .88rem; }
.resume-note span { display: block; margin-top: 4px; font-weight: 700; color: var(--good); }
.resume-note.late { background: var(--warn-soft); }
.resume-note.late span { color: var(--warn); }
/* one test at a time: the page shown when another test is still running */
.one-test { max-width: 640px; }
.one-test .discard summary { list-style: none; text-align: center; cursor: pointer; }
.one-test .discard summary::-webkit-details-marker { display: none; }
.one-test .discard[open] summary { display: none; }
.one-test .discard form { border: 1px solid var(--bad); background: var(--bad-soft); border-radius: 10px; padding: 12px; }
.one-test .discard p { margin: 0 0 10px; font-size: .9rem; }
.btn.danger { background: var(--bad); border-color: var(--bad); color: #fff; width: 100%; white-space: normal; }
.saved-note { font-size: .8rem; font-weight: 600; color: var(--good); }
.saved-note.off { color: var(--warn); }
.welcome-time { display: flex; align-items: baseline; gap: 10px; margin: 12px 0; }
.welcome-time b { font-size: 1.6rem; font-variant-numeric: tabular-nums; }
@media (max-width: 700px) { .saved-note:not(.off) { display: none; } .resume-banner { padding: 10px 16px; } }
@media (prefers-reduced-motion: reduce) { .resume-dot { animation: none; } }
@media (max-width: 700px) {
  .cbt-bar { padding: 8px 12px; gap: 8px; }
  .cbt-bar .brand-sub, .cbt-bar .muted.small { display: none; }
  .cbt-bar .brand-name { font-size: 16px; }
  .cbt-bar .timer { font-size: 1rem; padding: 4px 10px; }
}
.modal { min-width: 0; overflow-x: auto; }
@media (max-width: 500px) {
  .modal { padding: 18px; }
  .modal .list th, .modal .list td { padding: 6px 4px; font-size: .78rem; }
  .modal .list th { letter-spacing: 0; }
}

/* paper page after the test is submitted */
.done-head { font-weight: 700; color: var(--good); }
.done-score { font-size: 1.6rem; margin: 4px 0 6px; }
.done-score b { font-size: 2rem; }

/* ---------- sharing a paper */
.share-block { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 6px; }
.share-btn::before { content: "↗ "; }
.share-note { margin: 0; font-size: .8rem; color: var(--muted); line-height: 1.4; }
.share-menu { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; box-shadow: 0 6px 20px rgba(15, 23, 42, .12); overflow: hidden; }
.share-menu a, .share-menu button { padding: 10px 14px; text-align: left; font: inherit; color: var(--text);
  background: none; border: 0; text-decoration: none; cursor: pointer; }
.share-menu a + button { border-top: 1px solid var(--border); }
.share-menu a:hover, .share-menu button:hover { background: var(--accent-soft); }
.shared-eyebrow { color: var(--accent); font-weight: 600; font-size: .85rem; margin-bottom: 4px; }
.shared-facts { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 6px 0 14px; }
.shared-subject { border-left: 3px solid var(--subj, var(--accent)); padding: 4px 0 4px 10px; margin: 8px 0;
  display: flex; flex-direction: column; gap: 2px; font-size: .92rem; }
.shared-subject .muted { font-size: .82rem; }
.shared-go { display: block; text-align: center; margin-top: 16px; }
.friends-note { font-size: .82rem; color: var(--good); font-weight: 600; margin: -4px 0 12px; }

/* ---------- CBT test on phones and tablets: the question and its answers get the screen;
   the question palette opens as a panel from the "Questions" button in the top bar */
body.cbt { height: 100dvh; }
.pal-toggle, .pal-close-row { display: none; }
@media (max-width: 900px) {
  .cbt-main { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr); }
  .qpane { border-right: 0; }
  .palette { display: none; position: fixed; inset: 0 0 0 auto; width: min(340px, 90vw); max-height: none; z-index: 40;
    border-top: 0; border-left: 1px solid var(--border); box-shadow: -8px 0 24px rgba(10, 14, 24, .18); }
  body.pal-open .palette { display: block; }
  body.pal-open::after { content: ""; position: fixed; inset: 0; background: rgba(10, 14, 24, .4); z-index: 39; }
  .pal-close-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
  .pal-toggle { display: inline-flex; padding: 6px 12px; }
  .qimg { cursor: zoom-in; }
  .qimg.zoom { max-width: none; width: 220%; cursor: zoom-out; }
  .qhint { display: block; }
}
.qhint { display: none; margin: 4px 0 0; font-size: .75rem; color: var(--muted); }
@media (max-width: 600px) {
  .cbt-bar .cand { display: none; }
  .cbt-tabs { padding: 6px 12px 0; overflow-x: auto; }
  .cbt-tab { padding: 7px 12px; white-space: nowrap; }
  .qhead { padding-top: 8px; padding-bottom: 8px; gap: 6px; }
  .qhead .badge { white-space: normal; }
  .qbody { padding-bottom: 12px; }
  .options { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
  .opt { min-width: 0; padding: 10px 8px; justify-content: center; gap: 6px; }
  .numeric input { width: 100%; }
  .qactions { padding: 8px 12px; gap: 6px; }
  .qactions .group { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; width: 100%; }
  .qactions .group:last-child { grid-template-columns: repeat(3, 1fr); }
  .qactions .btn { padding: 8px 6px; font-size: .82rem; line-height: 1.2; text-align: center; }
}

/* ---------- "Free till ..." (app.free_offer): pill in the header */
.free-pill { flex: none; padding: 4px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent);
  font-size: .78rem; font-weight: 700; white-space: nowrap; margin-right: auto; }

/* sign-in page opened inside WhatsApp / Instagram / Facebook: how to open it in Chrome or Safari */
.inapp { margin-top: 18px; padding: 12px 14px; border-radius: 10px; background: var(--warn-soft); color: var(--text); font-size: .92rem; }
.inapp b { color: var(--warn); }
.inapp p { margin: 4px 0 10px; }
.inapp-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* sign-in page: what you get. Desktop: to the left of the card. Phones and tablets: one column, card first */
.student-wrap.with-why { display: flex; flex-direction: column; gap: 28px; }
.signin-why { order: 2; padding: 0 4px 24px; }
@media (max-width: 899px) { .signin-why h2 { font-size: 1.3rem; margin-bottom: 16px; } }
@media (min-width: 900px) {
  .student-wrap.with-why { max-width: 1000px; display: grid; grid-template-columns: minmax(0, 1fr) 440px; gap: 56px; align-items: center; }
  .signin-why { order: 0; padding: 0; }
}
.signin-why-eyebrow { font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.signin-why h2 { font-size: 1.7rem; margin: 8px 0 22px; }
.signin-why ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.signin-why li { display: flex; gap: 14px; align-items: flex-start; }
.signin-why svg { flex: none; width: 40px; height: 40px; padding: 9px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); }
.signin-why b { display: block; font-size: 1rem; }
.signin-why span { color: var(--muted); font-size: .92rem; }

/* privacy policy and terms pages; the line under the Google button */
.legal { max-width: 760px; }
.legal h1 { margin-top: 8px; }
.legal h2 { font-size: 1.1rem; margin: 26px 0 6px; }
.legal ul { padding-left: 20px; margin: 6px 0; }
.legal li { margin: 4px 0; }
.legal p { margin: 6px 0; }
.legal-note { margin: 14px 0 0; text-align: center; font-size: .8rem; color: var(--muted); }

/* private stats page (/admin) */
.stats-page h1 { margin-bottom: 2px; }
.stats-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.stats-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.stats-filters .chip { text-decoration: none; color: var(--text); font-size: .88rem; }
.stats-filters .chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-box { padding: 14px 16px; display: flex; flex-direction: column; gap: 2px; }
.stat-box span { color: var(--muted); font-size: .82rem; font-weight: 600; }
.stat-box b { font-size: 1.6rem; }
.stat-box small { color: var(--muted); font-size: .8rem; }
.stats-two { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; margin-bottom: 16px; }
.stats-card { padding: 16px 18px; margin-bottom: 16px; }
.stats-two .stats-card { margin-bottom: 0; }
.stats-card h2 { font-size: 1rem; margin-bottom: 12px; }
.stats-card h2.mt { margin-top: 18px; }
.bar-row { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) 40px; gap: 10px; align-items: center; padding: 5px 0; font-size: .9rem; }
.bar-row b { text-align: right; font-variant-numeric: tabular-nums; }
.bar-track { height: 10px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar-track i { display: block; height: 100%; background: var(--accent); border-radius: 99px; }
.table-wrap { overflow-x: auto; }