/* Styles for the study app. Colors and fonts come from ../assets/css/tokens.css */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--font-body); }
h1, h2, h3, .display { font-family: var(--font-display); letter-spacing: -0.015em; }
button { font: inherit; cursor: pointer; }
a { color: var(--primary); }
:focus-visible { outline: 3px solid var(--cta); outline-offset: 2px; border-radius: 6px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- top bar ---------- */
.topbar { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--surface) 92%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.topbar-in { max-width: 1100px; margin: 0 auto; padding: 8px 16px; display: flex; align-items: center; gap: 10px 14px; flex-wrap: wrap; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; border: 0; background: none; padding: 4px 2px; }
.brand b { font-family: var(--font-display); font-size: 19px; font-weight: 700; letter-spacing: -0.01em; line-height: 1; display: block; }
.brand small { display: block; font-size: 9.5px; font-weight: 700; letter-spacing: .3em; color: var(--ink-2); margin-top: 3px; }
.tabs { display: flex; gap: 4px; }
.tab { border: 0; background: transparent; color: var(--ink-2); padding: 10px 14px; border-radius: 10px; font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 7px; min-height: 44px; }
.tab:hover { color: var(--ink); background: var(--surface-2); }
.tab[aria-current="page"] { background: var(--primary-soft); color: var(--brand-deep); }
.tab svg { width: 19px; height: 19px; flex: none; }
.tab .count { font-size: 11.5px; font-weight: 800; background: var(--cta); color: var(--cta-ink); border-radius: 999px; padding: 1px 7px; }
.sp { flex: 1; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; gap: 2px; background: var(--surface); }
.seg button { border: 0; background: transparent; padding: 7px 13px; min-height: 34px; font-weight: 700; font-size: 13px; color: var(--ink-2); border-radius: 999px; }
.seg button[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); }
.bottomnav { display: none; }
@media (max-width: 760px) {
  .topbar .tabs { display: none; }
  .topbar-in { padding: 6px 12px; min-height: 56px; }
  .brand b { font-size: 16px; }
  .brand svg { width: 30px; height: 30px; }
  .topbar-in { gap: 6px; flex-wrap: nowrap; }
  .seg button { padding: 6px 9px; font-size: 12.5px; }
  .bottomnav { display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; background: var(--surface); border-top: 1px solid var(--line); padding: 4px 4px calc(4px + env(safe-area-inset-bottom)); }
  .bottomnav .tab { flex: 1; flex-direction: column; gap: 2px; font-size: 11.5px; padding: 7px 2px; min-height: 54px; justify-content: center; position: relative; }
  .bottomnav .tab .count { position: absolute; top: 3px; right: calc(50% - 22px); font-size: 10px; padding: 0 5px; }
  body { padding-bottom: 72px; }
  body.running .bottomnav { display: none; }
  body.running { padding-bottom: 0; }
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 24px 16px 64px; }
.view { display: none; }
.view.on { display: block; }

/* ---------- generic ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.pad { padding: 22px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); padding: 0 18px; min-height: 44px; border-radius: 12px; font-weight: 700; font-size: 15px; text-decoration: none; }
.btn:hover { border-color: var(--ink-3); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.cta { background: var(--cta); border-color: var(--cta); color: var(--cta-ink); }
.btn.cta:hover { filter: brightness(1.05); }
.btn.outline { border-color: var(--primary); color: var(--brand-deep); }
.btn.danger { color: var(--bad); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.small { min-height: 36px; padding: 0 13px; font-size: 13.5px; border-radius: 10px; }
.muted { color: var(--ink-2); }
.small { font-size: 13.5px; }
.eyebrow { margin: 0; font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--primary); }
.chip { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; letter-spacing: .02em; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.chip.dom-A { background: color-mix(in srgb, var(--dom-a) 14%, var(--surface)); color: var(--dom-a); }
.chip.dom-B { background: color-mix(in srgb, var(--dom-b) 15%, var(--surface)); color: var(--dom-b); }
.chip.dom-C { background: color-mix(in srgb, var(--dom-c) 14%, var(--surface)); color: var(--dom-c); }
.chip.dom-D { background: color-mix(in srgb, var(--dom-d) 13%, var(--surface)); color: var(--dom-d); }
.chip.dom-E { background: color-mix(in srgb, var(--dom-e) 16%, var(--surface)); color: var(--dom-e); }
.chip.dom-F { background: color-mix(in srgb, var(--dom-f) 13%, var(--surface)); color: var(--dom-f); }
.chip.dom-G { background: color-mix(in srgb, var(--dom-g) 13%, var(--surface)); color: var(--dom-g); }
.chip.dom-H { background: color-mix(in srgb, var(--dom-h) 13%, var(--surface)); color: var(--dom-h); }
.chip.dom-I { background: color-mix(in srgb, var(--dom-i) 14%, var(--surface)); color: var(--dom-i); }
.chip.plain { background: var(--surface-2); color: var(--ink-2); }
.chip.wrap { white-space: normal; line-height: 1.35; }
.bar { height: 10px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: 99px; background: var(--primary); }
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 860px) { .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) { .grid.cols-2 { grid-template-columns: minmax(0, 1fr); } }
.section-head { display: flex; align-items: baseline; gap: 12px; margin: 36px 0 14px; flex-wrap: wrap; }
.section-head h2 { margin: 0; font-size: 24px; font-weight: 700; color: var(--brand-deep); }
.page-head { display: flex; flex-direction: column; gap: 6px; margin: 4px 0 6px; }
.page-head h1 { margin: 0; font-size: clamp(28px, 4.4vw, 38px); line-height: 1.08; font-weight: 800; color: var(--brand-deep); }
.page-head p { margin: 0; color: var(--ink-2); max-width: 68ch; }
.domain-letter { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; font-weight: 800; font-size: 14px; color: #fff; background: var(--dom-a); flex: none; }
.dom-A-bg { background: var(--dom-a) !important; } .dom-B-bg { background: var(--dom-b) !important; }
.dom-C-bg { background: var(--dom-c) !important; } .dom-D-bg { background: var(--dom-d) !important; }
.dom-E-bg { background: var(--dom-e) !important; } .dom-F-bg { background: var(--dom-f) !important; }
.dom-G-bg { background: var(--dom-g) !important; } .dom-H-bg { background: var(--dom-h) !important; } .dom-I-bg { background: var(--dom-i) !important; }
.score-pill { font-weight: 800; font-size: 14px; padding: 3px 10px; border-radius: 999px; white-space: nowrap; }
.score-pill.hi { background: var(--good-soft); color: var(--good); }
.score-pill.mid { background: var(--amber-soft); color: var(--amber); }
.score-pill.lo { background: var(--bad-soft); color: var(--bad); }
.score-pill.none { background: var(--surface-2); color: var(--ink-3); }

/* ---------- choose exam ---------- */
body.choosing .tabs, body.choosing .bottomnav { display: none !important; }
@media (max-width: 760px) { body.choosing { padding-bottom: 0; } }
.choose-card.last { border-color: var(--primary); }
.choose-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.last-chip { background: var(--primary-soft); color: var(--brand-deep); }
.choose-prog { display: flex; flex-direction: column; gap: 6px; }
.choose-card .btn { align-self: flex-start; margin-top: 6px; pointer-events: none; }
.linkbtn { border: 0; background: none; color: var(--primary); font-weight: 700; font-size: 13.5px; text-decoration: underline; text-underline-offset: 4px; padding: 6px 2px; min-height: 32px; }
.choose { max-width: 820px; margin: 24px auto 0; display: flex; flex-direction: column; gap: 22px; }
.choose h1 { margin: 0; font-size: clamp(30px, 5vw, 44px); line-height: 1.06; font-weight: 800; color: var(--brand-deep); }
.choose-card { text-align: left; padding: 26px; border: 2px solid var(--line); border-radius: 20px; background: var(--surface); color: var(--ink); display: flex; flex-direction: column; gap: 10px; box-shadow: var(--shadow); }
.choose-card:hover { border-color: var(--primary); }
.choose-top b { font-family: var(--font-display); font-size: 28px; color: var(--brand-deep); }
.choose-prog b { color: var(--brand-deep); }
.choose-card span { color: var(--ink-2); font-size: 15px; }

/* ---------- dashboard ---------- */
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 16px; margin-top: 18px; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }
.continue-card { background: var(--brand-deep); color: #fff; border: 0; padding: 26px; display: flex; flex-direction: column; gap: 12px; }
@media (prefers-color-scheme: dark) { .continue-card { background: #1C3D35; } }
.continue-card .eyebrow { color: var(--brand-mint); }
.continue-card h2 { margin: 0; font-size: 26px; line-height: 1.15; color: #fff; }
.continue-card p { margin: 0; color: #D6E8E1; }
.continue-card .bar { background: rgba(255,255,255,.18); }
.continue-card .bar > i { background: var(--cta); }
.next-card { padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.next-card h2 { margin: 0; font-size: 21px; line-height: 1.2; color: var(--brand-deep); }
.next-card p { margin: 0; color: var(--ink-2); font-size: 15px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.stat { padding: 18px 20px; display: flex; flex-direction: column; gap: 4px; }
.stat .num { font-family: var(--font-display); font-size: 32px; font-weight: 800; line-height: 1; color: var(--brand-deep); }
.stat .num small { font-size: 16px; color: var(--ink-3); font-weight: 600; }
.stat .lbl { color: var(--ink-2); font-size: 14px; }
.dom-row { display: grid; grid-template-columns: 32px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 12px 0; }
.dom-row + .dom-row { border-top: 1px solid var(--line); }
.dom-row .nm { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.dom-row .nm b { font-size: 15px; line-height: 1.3; }
.dom-row .nm .meta { font-size: 12.5px; color: var(--ink-3); }
.dom-row .bar > i.hi { background: var(--good); } .dom-row .bar > i.mid { background: var(--cta); } .dom-row .bar > i.lo { background: var(--bad); }
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-2); margin-top: 10px; }
.legend i { display: inline-block; width: 11px; height: 11px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }
.hist { display: flex; align-items: flex-end; gap: 10px; height: 150px; padding: 10px 2px 0; border-bottom: 1px solid var(--line); overflow-x: auto; }
.hist .col { flex: 0 0 52px; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 5px; height: 100%; }
.hist .col i { display: block; width: 32px; border-radius: 7px 7px 0 0; background: var(--primary); }
.hist .col b { font-size: 12.5px; }
.hist-labels { display: flex; gap: 10px; padding: 6px 2px 0; overflow-x: hidden; }
.hist-labels span { flex: 0 0 52px; text-align: center; font-size: 11.5px; color: var(--ink-3); line-height: 1.25; }
.mock-row { display: flex; align-items: center; gap: 12px; padding: 11px 0; flex-wrap: wrap; }
.mock-row + .mock-row { border-top: 1px solid var(--line); }
.mock-row .grow { flex: 1; min-width: 160px; }
.storage { margin-top: 30px; padding: 18px 20px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.storage p { margin: 0; flex: 1; min-width: 240px; font-size: 14px; color: var(--ink-2); }

/* ---------- practice lists ---------- */
.list-row { display: flex; align-items: center; gap: 14px; padding: 14px 18px; flex-wrap: wrap; }
.list-row + .list-row { border-top: 1px solid var(--line); }
.list-row .grow { flex: 1; min-width: 200px; display: flex; flex-direction: column; gap: 2px; }
.list-row .grow b { font-size: 15.5px; line-height: 1.3; }
.list-row .grow span { font-size: 13px; color: var(--ink-3); }
.test-card { padding: 22px; display: flex; flex-direction: column; gap: 10px; }
.test-card h3 { margin: 0; font-size: 20px; line-height: 1.2; color: var(--brand-deep); }
.test-card p { margin: 0; color: var(--ink-2); font-size: 14.5px; flex: 1; }
.test-card .meta { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.test-card .foot { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.step-num { width: 30px; height: 30px; border-radius: 50%; background: var(--primary-soft); color: var(--brand-deep); font-weight: 800; display: inline-grid; place-items: center; font-size: 14px; }
details.explain { margin-top: 14px; }
details.explain > summary { cursor: pointer; font-weight: 700; color: var(--brand-deep); padding: 8px 0; }
details.explain p { margin: 8px 0; color: var(--ink-2); font-size: 14.5px; max-width: 78ch; }

/* ---------- guide ---------- */
.searchbar input { width: 100%; font: inherit; padding: 0 16px; min-height: 48px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); }
.part-title { margin: 28px 0 4px; font-size: 13px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; color: var(--ink-2); }
.chap-row { display: flex; gap: 14px; align-items: center; width: 100%; text-align: left; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); color: var(--ink); margin-top: 8px; min-height: 60px; }
.chap-row:hover { border-color: var(--primary); }
.chap-row .cnum { flex: none; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: var(--surface-2); font-weight: 800; font-size: 15px; color: var(--brand-deep); }
.chap-row.read .cnum { background: var(--primary); color: var(--primary-ink); }
.chap-row .ct { flex: 1; min-width: 0; }
.chap-row .ct b { display: block; font-size: 15.5px; line-height: 1.3; }
.chap-row .ct span { color: var(--ink-3); font-size: 12.5px; }
.chap-row .done { flex: none; font-size: 12px; font-weight: 800; color: var(--good); }
.chap-row .arr { color: var(--ink-3); font-size: 20px; }

/* ---------- reader ---------- */
.reader-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.reader h1 { font-size: clamp(26px, 4.4vw, 36px); line-height: 1.12; margin: 12px 0 4px; font-weight: 800; color: var(--brand-deep); }
.reader .chap-meta { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0 20px; }
.md { font-size: 17px; line-height: 1.7; max-width: 74ch; }
.md h2 { font-size: 24px; margin: 32px 0 8px; line-height: 1.25; font-weight: 700; color: var(--brand-deep); }
.md h3 { font-size: 20px; margin: 26px 0 6px; font-weight: 700; }
.md h4 { font-size: 17px; margin: 18px 0 5px; font-family: var(--font-body); font-weight: 800; }
.md p { margin: 10px 0; }
.md ul, .md ol { margin: 8px 0 12px; padding-left: 26px; }
.md li { margin: 4px 0; }
.md li > ul, .md li > ol { margin: 3px 0 5px; }
.md blockquote { margin: 16px 0; padding: 12px 18px; border-radius: 12px; background: var(--primary-soft); }
.md blockquote p { margin: 4px 0; }
.md code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .88em; background: var(--surface-2); padding: 1px 5px; border-radius: 5px; }
.md pre { background: var(--surface-2); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; overflow-x: auto; font-size: 13.5px; line-height: 1.5; }
.md pre code { background: transparent; padding: 0; }
.md hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.table-wrap { overflow-x: auto; margin: 14px 0; border: 1px solid var(--line); border-radius: 12px; }
.md table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.45; }
.md th, .md td { padding: 8px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.md th { background: var(--surface-2); font-weight: 700; }
.md tr:last-child td { border-bottom: 0; }
.md details.answerkey { border: 1px solid var(--line); border-radius: 12px; padding: 4px 16px 10px; background: var(--surface); margin: 16px 0; }
.md details.answerkey summary { cursor: pointer; font-weight: 800; padding: 10px 0; color: var(--brand-deep); font-family: var(--font-display); font-size: 19px; }
.reader-nav { display: flex; gap: 10px; margin-top: 36px; flex-wrap: wrap; }
.chapter-end { margin-top: 30px; padding: 20px 22px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; background: var(--amber-soft); border: 0; }
.chapter-end p { margin: 0; flex: 1; min-width: 220px; }

/* ---------- runner ---------- */
.runner-bar { position: sticky; top: 60px; z-index: 30; background: color-mix(in srgb, var(--bg) 94%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); margin: -24px -16px 0; padding: 10px 16px; }
@media (max-width: 760px) { .runner-bar { top: 56px; } }
.runner-bar-in { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.timer { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-weight: 700; font-size: 17px; padding: 5px 12px; border-radius: 9px; background: var(--surface-2); }
.timer.low { background: var(--bad-soft); color: var(--bad); }
.qcount { font-weight: 700; font-size: 14.5px; }
.rprogress { flex: 1; min-width: 90px; }
.question-card { padding: 24px; margin-top: 20px; }
.question-card .qmeta { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; align-items: center; }
.question-card .stem { font-size: 18px; line-height: 1.6; margin: 0 0 18px; }
.opts { display: grid; gap: 10px; }
.opt { display: flex; gap: 12px; align-items: flex-start; text-align: left; width: 100%; padding: 14px 16px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); font-size: 16px; line-height: 1.5; min-height: 52px; }
.opt .letter { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--line); display: grid; place-items: center; font-weight: 800; font-size: 13.5px; margin-top: 1px; }
.opt:hover { border-color: var(--ink-3); }
.opt.sel { border-color: var(--primary); background: var(--primary-soft); }
.opt.sel .letter { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.opt.correct { border-color: var(--good); background: var(--good-soft); }
.opt.correct .letter { background: var(--good); border-color: var(--good); color: #fff; }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt.wrong .letter { background: var(--bad); border-color: var(--bad); color: #fff; }
.opt:disabled { cursor: default; opacity: 1; }
.runner-nav { display: flex; gap: 10px; margin-top: 20px; align-items: center; flex-wrap: wrap; }
.flagbtn[aria-pressed="true"] { background: var(--amber-soft); border-color: var(--flag); color: var(--amber); }
.feedback { margin-top: 18px; border-radius: 14px; padding: 16px 18px; border: 1px solid var(--line); }
.feedback.ok { background: var(--good-soft); border-color: color-mix(in srgb, var(--good) 40%, var(--line)); }
.feedback.no { background: var(--bad-soft); border-color: color-mix(in srgb, var(--bad) 40%, var(--line)); }
.feedback h4 { margin: 0 0 6px; font-size: 16px; }
.feedback p { margin: 6px 0; font-size: 15px; }
.feedback .clue { border-top: 1px dashed var(--line); padding-top: 9px; margin-top: 10px; }

.overlay { position: fixed; inset: 0; z-index: 60; background: rgba(10, 16, 15, .5); display: none; align-items: flex-end; justify-content: center; }
.overlay.on { display: flex; }
.sheet { background: var(--surface); width: min(680px, 100%); max-height: 86vh; overflow-y: auto; border-radius: 20px 20px 0 0; padding: 22px; }
@media (min-width: 700px) { .overlay { align-items: center; } .sheet { border-radius: 20px; } }
.sheet h3 { margin: 0 0 6px; font-size: 21px; color: var(--brand-deep); }
.navgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(44px, 1fr)); gap: 7px; margin: 14px 0; }
.navcell { position: relative; height: 44px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); font-weight: 700; font-size: 14px; }
.navcell.answered { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.navcell.now { outline: 3px solid var(--cta); outline-offset: 1px; }
.navcell .fdot { position: absolute; top: 4px; right: 4px; width: 8px; height: 8px; border-radius: 50%; background: var(--flag); border: 1.5px solid var(--surface); }

/* ---------- results & review ---------- */
.score-hero { display: flex; gap: 24px; align-items: center; padding: 24px; flex-wrap: wrap; }
.ring { position: relative; width: 132px; height: 132px; flex: none; }
.ring svg { transform: rotate(-90deg); }
.ring .ring-num { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; }
.ring .ring-num b { font-family: var(--font-display); font-size: 36px; line-height: 1; display: block; }
.ring .ring-num span { font-size: 11.5px; color: var(--ink-2); font-weight: 700; letter-spacing: .04em; }
.score-hero .verdict { flex: 1; min-width: 240px; }
.score-hero .verdict h2 { margin: 0 0 6px; font-size: 26px; color: var(--brand-deep); }
.score-hero .verdict p { margin: 0; color: var(--ink-2); max-width: 60ch; }
.agg-row { display: grid; grid-template-columns: 32px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 10px 0; }
.agg-row + .agg-row { border-top: 1px solid var(--line); }
.agg-row .names b { display: block; font-size: 15px; }
.agg-row .names span { font-size: 12.5px; color: var(--ink-2); }
.agg-row .nums { text-align: right; }
.agg-row .nums b { font-size: 16px; }
.agg-row .nums span { display: block; font-size: 12px; color: var(--ink-2); }
.task-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.task-table th, .task-table td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
.task-table th { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-2); }
.task-table .r { text-align: right; }
.review-item { border: 1px solid var(--line); border-radius: 14px; margin-top: 10px; background: var(--surface); overflow: hidden; }
.review-item > summary { cursor: pointer; padding: 14px 16px; display: flex; gap: 11px; align-items: flex-start; list-style: none; font-size: 15px; }
.review-item > summary::-webkit-details-marker { display: none; }
.review-item .body { padding: 2px 16px 16px; border-top: 1px dashed var(--line); }
.review-item .body p { margin: 8px 0; font-size: 15px; }
.mark { flex: none; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 800; color: #fff; margin-top: 1px; }
.mark.ok { background: var(--good); } .mark.no { background: var(--bad); } .mark.flag { background: var(--flag); }
.optline { display: flex; gap: 9px; padding: 8px 10px; border-radius: 9px; margin-top: 6px; font-size: 14.5px; align-items: flex-start; }
.optline .letter { flex: none; font-weight: 800; width: 20px; }
.optline.correct { background: var(--good-soft); }
.optline.yours-wrong { background: var(--bad-soft); }
.optline .tag { margin-left: auto; flex: none; font-size: 11.5px; font-weight: 800; letter-spacing: .03em; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 14px 0 4px; }
.fchip { border: 1.5px solid var(--line); background: var(--surface); color: var(--ink-2); border-radius: 999px; padding: 0 13px; min-height: 36px; font-weight: 700; font-size: 13px; }
.fchip[aria-pressed="true"] { border-color: var(--primary); background: var(--primary-soft); color: var(--brand-deep); }
.empty { padding: 34px 24px; text-align: center; }
.empty h3 { margin: 0 0 6px; font-size: 21px; color: var(--brand-deep); }
.empty p { margin: 0 auto; max-width: 52ch; color: var(--ink-2); }

footer.site { border-top: 1px solid var(--line); margin-top: 24px; padding: 24px 16px 36px; color: var(--ink-3); font-size: 13px; }
footer.site .in { max-width: 1100px; margin: 0 auto; }
footer.site p { margin: 0; max-width: 82ch; }
.hide { display: none !important; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

/* ---------- online: sign-in screen, account button, locked content ---------- */
body.booting > .topbar, body.booting > main, body.booting > .bottomnav, body.booting > footer { display: none !important; }
#auth:empty { display: none; }
.auth-wrap { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 32px 16px; gap: 16px; }
.auth-card { width: 100%; max-width: 440px; padding: 30px 28px; display: flex; flex-direction: column; gap: 14px; }
.auth-card h1 { margin: 0; font-size: 28px; line-height: 1.1; font-weight: 800; color: var(--brand-deep); }
.auth-card p { margin: 0; }
.auth-card .eyebrow { margin: 0; }
.auth-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.auth-brand b { display: block; font-family: var(--font-display); font-size: 22px; color: var(--brand-deep); line-height: 1; }
.auth-brand small { display: block; font-size: 11px; letter-spacing: .18em; font-weight: 700; color: var(--ink-2); margin-top: 3px; }
.auth-card form { display: flex; flex-direction: column; gap: 8px; }
.auth-card label { font-weight: 700; font-size: 14px; margin-top: 4px; }
.auth-card input { font: inherit; font-size: 16px; min-height: 46px; padding: 0 14px; border: 1.5px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--ink); }
.auth-card input:focus { border-color: var(--primary); }
.auth-card form .btn { margin-top: 10px; }
.auth-card .linkbtn { align-self: flex-start; }
.auth-card .small a { color: var(--primary); }
.auth-tabs { align-self: stretch; display: flex; }
.auth-tabs button { flex: 1; }
.auth-msg { padding: 12px 14px; border-radius: 12px; font-size: 14.5px; line-height: 1.45; }
.auth-msg.good { background: var(--primary-soft); color: var(--brand-deep); }
.auth-msg.bad { background: color-mix(in srgb, var(--bad) 12%, var(--surface)); color: var(--bad); }
.auth-loading { display: flex; align-items: center; gap: 12px; padding: 18px 0; color: var(--ink-2); font-weight: 600; }
.spinner { width: 22px; height: 22px; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--primary); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 2.4s; } }
.auth-foot { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: center; margin: 0; font-size: 14px; }
.auth-foot a { color: var(--ink-2); }

.acct { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 3px 12px 3px 3px; min-height: 40px; font-weight: 700; font-size: 13px; }
.acct .av { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: var(--primary-ink); display: inline-flex; align-items: center; justify-content: center; font-size: 14px; }
.acct.hide { display: none; }
@media (max-width: 520px) { .acct { padding-right: 3px; } .acct .lbl { display: none; } }

.lock { vertical-align: -2px; flex: none; }
.btn.unlock { gap: 6px; border-color: var(--cta); }
.chap-row.locked, .list-row.locked, .mock-row.locked, .test-card.locked { opacity: .78; }
.chap-row.locked .cnum { background: var(--surface-2); color: var(--ink-3); }
.lock-tag { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; font-weight: 700; color: var(--ink-2); white-space: nowrap; }
.test-card.locked h3 { color: var(--ink-2); }
.up-list { margin: 12px 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; }
.sheet h3 .lock { width: 18px; height: 18px; }