:root{
  --ink:oklch(0.23 0.02 50);
  --paper:oklch(0.97 0.01 80);
  --bg:oklch(0.965 0.012 80);
  --muted:oklch(0.42 0.02 50);
  --accent:oklch(0.42 0.06 45);
  --rule:oklch(0.86 0.015 70);
  --card:oklch(0.99 0.005 80);
  --chip:oklch(0.9 0.02 80);
  --display:'Bricolage Grotesque';
  --sticky-top:0px;
  --main-pad:0 20px 120px;
  --home-top:0px;
}
@media (min-width:860px){
  :root{--sticky-top:68px;--main-pad:24px 20px 72px;--home-top:32px}
}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:'Atkinson Hyperlegible',system-ui,sans-serif;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}
a{color:var(--ink);text-underline-offset:3px}
a:hover{color:oklch(0.45 0.14 40)}
button,select{font:inherit;color:inherit}
:focus-visible{outline:3px solid oklch(0.5 0.2 265);outline-offset:3px;border-radius:6px}
[tabindex="-1"]:focus{outline:none}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

#app{min-height:100vh;display:flex;flex-direction:column;align-items:center}
.loading{padding:40px 20px;color:oklch(0.45 0.02 50)}
main{width:100%;max-width:1160px;padding:var(--main-pad);flex:1}
.wrap{max-width:720px;margin:0 auto}

/* chrome: narrow header and bottom bar below 860px, top nav bar from 860px */
.hdr-narrow{width:100%;max-width:1160px;padding:16px 20px 8px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.hdr-wide{display:none;position:sticky;top:0;z-index:6;width:100%;background:var(--ink);color:var(--paper)}
.hdr-wide-in{max-width:1160px;margin:0 auto;padding:6px 20px;display:flex;align-items:center;gap:32px}
.brand{background:none;border:0;padding:8px 0;cursor:pointer;display:flex;align-items:center;gap:10px;min-height:44px}
.hdr-wide .brand{color:var(--paper)}
.brand-dot{width:22px;height:22px;border-radius:50%;background:conic-gradient(oklch(0.8 0.13 55) 0 62%, oklch(0.8 0.1 265) 0)}
.brand-name{font-family:var(--display);font-weight:800;font-size:18px;letter-spacing:-0.01em}
.hdr-wide .brand-name{font-size:19px}
.tabs-wide{display:flex;gap:4px;flex:1}
.tab{position:relative;min-height:56px;padding:0 14px;border:0;background:transparent;color:var(--paper);font-weight:700;font-size:16px;cursor:pointer;opacity:0.72}
.tab:hover,.tab.is-cur{opacity:1}
.tab-bar{position:absolute;left:14px;right:14px;bottom:6px;height:4px;border-radius:2px;background:transparent}
.tab.is-cur .tab-bar{background:oklch(0.8 0.13 55)}
.btm{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:center;padding:0 12px 12px;z-index:4;pointer-events:none}
.btm-in{pointer-events:auto;width:100%;max-width:520px;display:grid;grid-template-columns:repeat(4,1fr);gap:4px;padding:6px;border-radius:20px;background:var(--ink);box-shadow:0 8px 30px oklch(0.3 0.03 50 / 0.25)}
.btm-btn{min-height:52px;border:0;border-radius:14px;background:transparent;color:var(--paper);font-weight:700;font-size:15px;cursor:pointer}
.btm-btn.is-cur{background:var(--paper);color:var(--ink)}
@media (min-width:860px){
  .hdr-narrow,.btm{display:none}
  .hdr-wide{display:block}
}

/* shared pieces */
.eyebrow{margin:0 0 10px;font-size:14px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--accent)}
.badge{font-size:12px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;padding:4px 8px;border-radius:6px;background:var(--chip)}
.badge-sm{padding:3px 7px;margin-left:4px}
.badge-card{background:var(--card)}
.badge-ink{padding:5px 9px;background:var(--ink);color:var(--paper)}
.chips{display:flex;gap:8px;overflow-x:auto}
.chip{min-height:44px;padding:8px 16px;border-radius:999px;border:2px solid var(--ink);background:transparent;color:var(--ink);font-weight:700;cursor:pointer;white-space:nowrap}
.chip.is-on{background:var(--ink);color:var(--paper)}
.btn{border:0;border-radius:14px;background:var(--ink);color:var(--paper);cursor:pointer}
.start-btn:hover{background:oklch(0.35 0.06 45)}
.link-btn{background:none;border:0;padding:0;min-height:44px;cursor:pointer;text-decoration:underline}
.h-display{font-family:var(--display);font-weight:800}
.rule-row{border-bottom:1px solid var(--rule)}

/* home */
.chips-home{margin:12px 0 28px}
.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,440px),1fr));gap:24px 64px;align-items:start;padding-top:var(--home-top)}
.home-h1{font-family:var(--display);font-weight:800;font-size:clamp(42px,11vw,68px);line-height:0.98;letter-spacing:-0.035em;margin:0 0 20px;text-wrap:balance}
.home-lede{font-size:19px;line-height:1.5;margin:0 0 12px;max-width:34em;text-wrap:pretty}
.home-meta{font-size:15px;line-height:1.5;margin:0 0 28px;color:var(--muted)}
.home-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:44px}
.start-btn{min-height:56px;padding:14px 28px;font-family:var(--display);font-weight:800;font-size:20px}
.best{font-size:15px;color:var(--muted)}
.home-side{display:flex;flex-direction:column;gap:32px;margin-bottom:44px}
.ed-list-wrap{display:none}
@media (min-width:860px){
  .ed-list-wrap{display:block}
  .chips-home{display:none}
}
.ed-list{display:flex;flex-direction:column;gap:8px}
.ed-pill{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:64px;padding:10px 22px;border-radius:999px;border:2px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer;text-align:left}
.ed-pill:hover{border-width:3px}
.ed-pill.is-on{background:var(--ink);color:var(--paper)}
.ed-pill-t{font-family:var(--display);font-weight:800;font-size:22px;letter-spacing:-0.02em}
.ed-pill-s{font-size:15px}
.teaser{border-top:2px solid var(--ink);padding-top:16px}
.teaser-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.teaser-h{font-family:var(--display);font-weight:800;font-size:22px;margin:0}
.teaser-card{position:relative;border-radius:12px;overflow:hidden;background:oklch(0.93 0.012 80);padding:16px;display:flex;gap:16px;align-items:center}
.fill{position:absolute;inset:0}
.teaser-pct{position:relative;font-family:var(--display);font-weight:800;font-size:40px;letter-spacing:-0.03em;font-variant-numeric:tabular-nums;min-width:2.4em}
.teaser-txt{position:relative;font-size:16px;line-height:1.35}
.teaser-link{margin-top:12px;min-height:44px;font-weight:700;font-size:16px;text-underline-offset:4px}
.source-line{margin:32px 0 0;font-size:14px;color:var(--muted)}
.source-line a{color:var(--muted)}

/* quiz */
.q-sticky{position:sticky;top:var(--sticky-top);background:var(--bg);padding:12px 0 16px;z-index:2}
.q-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.q-count{font-weight:700;font-size:15px}
.q-count span{font-weight:400;color:var(--muted)}
.q-exit{min-height:44px;padding:0 4px;background:none;border:0;font-size:15px;text-decoration:underline;cursor:pointer}
.segs{display:grid;grid-template-columns:repeat(10,1fr);gap:4px}
.seg{height:8px;border-radius:4px;background:var(--rule)}
.seg.right{background:oklch(0.62 0.13 150)}
.seg.wrong{background:oklch(0.62 0.16 25)}
.seg.current{background:var(--ink)}
.q-h{font-family:var(--display);font-weight:600;font-size:clamp(25px,6.5vw,32px);line-height:1.15;letter-spacing:-0.02em;margin:12px 0 24px;text-wrap:pretty}
.opts{display:flex;flex-direction:column;gap:10px}
.opts.has-sheet{padding-bottom:420px}
.opt{display:flex;align-items:center;gap:14px;text-align:left;min-height:60px;padding:12px 16px;border-radius:14px;border:2px solid var(--rule);background:var(--card);font-size:18px;line-height:1.3;cursor:pointer}
.opt.right{background:oklch(0.86 0.1 150);border-color:oklch(0.5 0.12 150)}
.opt.wrong{background:oklch(0.86 0.09 25);border-color:oklch(0.55 0.15 25)}
.opt.dim{opacity:0.55}
.opt:hover{border-color:var(--ink)}
.opt-mark{flex:none;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:15px;background:var(--ink);color:var(--paper)}
.sheet{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:center;z-index:5}
.sheet-in{width:100%;max-width:620px;border-radius:22px 22px 0 0;padding:22px 20px 24px;box-shadow:0 -10px 40px oklch(0.3 0.03 50 / 0.18);max-height:72vh;overflow:auto}
.sheet-in.right{background:oklch(0.86 0.1 150)}
.sheet-in.wrong{background:oklch(0.86 0.09 25)}
.verdict{margin:0 0 6px;font-family:var(--display);font-weight:800;font-size:28px;letter-spacing:-0.02em}
.sheet-ans{margin:0 0 8px;font-size:17px}
.sheet-exp{margin:0 0 14px;font-size:17px;line-height:1.5}
.src-card{display:block;padding:12px 14px;border-radius:12px;background:var(--card);text-decoration:none;margin-bottom:12px}
.src-card:hover{background:white}
.src-t{display:block;font-weight:700;font-size:16px;line-height:1.3}
.src-d{display:block;font-size:14px;color:var(--muted);margin-top:2px}
.sheet-pct{margin:0 0 16px;font-size:15px}
.next-btn{width:100%;min-height:54px;font-family:var(--display);font-weight:800;font-size:19px}

/* results */
.res-eyebrow{margin:16px 0 4px;font-size:14px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--accent)}
.score{margin:0;font-family:var(--display);font-weight:800;font-size:112px;line-height:0.9;letter-spacing:-0.05em;font-variant-numeric:tabular-nums}
.score span{font-size:48px;color:oklch(0.5 0.02 50)}
.res-verdict{margin:12px 0 18px;font-family:var(--display);font-weight:600;font-size:24px}
.rev-bars{display:grid;grid-template-columns:repeat(10,1fr);gap:4px;margin-bottom:12px}
.rev-bar{height:14px;border-radius:4px}
.rev-bar.right,.rev-mark.right{background:oklch(0.75 0.13 150)}
.rev-bar.wrong,.rev-mark.wrong{background:oklch(0.78 0.12 25)}
.compare{margin:0 0 10px}
.compare-pct{margin:0 0 10px;font-size:17px}
.compare-pct b{font-family:var(--display);font-weight:800;font-size:26px;letter-spacing:-0.02em;font-variant-numeric:tabular-nums}
.dist{display:grid;grid-template-columns:repeat(11,1fr);gap:4px;align-items:end;height:56px}
.dist-col{display:block;border-radius:3px 3px 0 0;background:oklch(0.86 0.015 70)}
.dist-col.you{background:var(--ink)}
.dist-axis{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:2px}
.compare-avg{margin:8px 0 0;font-size:15px;color:oklch(0.35 0.02 50)}
.mock-note{margin:0 0 22px;font-size:14px;color:var(--muted)}
.res-h2-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.res-h2-row.ruled{border-top:2px solid var(--ink);padding-top:16px;margin-bottom:8px}
.res-h2-row.ruled .res-h2{margin:0}
.rev-a.you{color:oklch(0.45 0.12 25)}
.rev-data{position:relative;height:32px;border-radius:8px;background:oklch(0.93 0.01 80);overflow:hidden;margin:2px 0 8px}
.rev-data .fill{position:absolute;top:0;bottom:0;left:0}
.rev-data-t{position:relative;display:block;line-height:32px;padding-left:10px;font-size:15px;font-weight:700;font-variant-numeric:tabular-nums}
.rev-a.ok{color:oklch(0.35 0.1 150)}
.res-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:36px}
.btn-main{min-height:52px;padding:12px 22px;font-weight:700;font-size:17px}
.btn-line{min-height:52px;padding:12px 22px;border:2px solid var(--ink);border-radius:14px;background:transparent;font-weight:700;font-size:17px;cursor:pointer}
.res-h2{font-family:var(--display);font-weight:800;font-size:24px;margin:16px 0 4px}
.review{list-style:none;margin:0 0 36px;padding:0}
.review li{display:grid;grid-template-columns:32px minmax(0,1fr);gap:12px;padding:14px 0;border-bottom:1px solid var(--rule)}
.rev-mark{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-weight:700}
.rev-q{margin:0 0 6px;font-weight:700;font-size:16px;line-height:1.35}
.rev-a{margin:0 0 6px;font-size:15px;line-height:1.4}
.rev-a .you{color:oklch(0.45 0.12 25)}
.rev-src{font-size:14px}
.hist-note{margin:0 0 12px;font-size:14px;color:var(--muted)}
.hist-empty{font-size:16px}
.hist-empty .link-btn{font-weight:700}
.hist{list-style:none;margin:0;padding:0}
.hist li{padding:10px 0;border-bottom:1px solid var(--rule)}
.hist-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;width:100%}
.hist-open{grid-template-columns:minmax(0,1fr) auto auto;min-height:44px;padding:0;border:0;background:none;text-align:left;cursor:pointer}
.hist-open:hover .hist-bar{outline:2px solid var(--ink)}
.hist-go{font-size:24px;line-height:1;color:var(--muted)}
@media (max-width:520px){
  .hist-row{grid-template-columns:minmax(0,1fr) auto}
  .hist-open{grid-template-columns:minmax(0,1fr) auto}
  .hist-bar{grid-column:1/-1}
  .hist-sc{grid-column:1}
  .hist-go{grid-column:2;grid-row:2}
}
.hist-bar{position:relative;height:28px;border-radius:6px;background:oklch(0.92 0.012 80);overflow:hidden}
.hist-bar .fill{background:oklch(0.82 0.1 55)}
.hist-bar span:last-child{position:relative;line-height:28px;padding-left:10px;font-size:15px;font-weight:700}
.hist-sc{font-size:15px;font-variant-numeric:tabular-nums}
.clear-hist{margin-top:12px;font-size:15px;color:var(--muted)}

/* leaderboard */
.board-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,380px),1fr));gap:8px 56px;align-items:start}
.board-intro{max-width:520px}
.page-h1{font-family:var(--display);font-weight:800;font-size:clamp(34px,9vw,48px);letter-spacing:-0.03em;margin:16px 0 8px}
.board-h1{line-height:1;margin:16px 0 10px}
.board-lede{font-size:17px;line-height:1.5;margin:0 0 18px;max-width:34em}
.chips-board{margin-bottom:14px}
.chips-board .chip{padding:8px 14px}
.cohort{margin-bottom:14px;border:2px solid var(--rule);border-radius:14px;padding:4px 14px}
.cohort summary{min-height:44px;display:flex;align-items:center;cursor:pointer;font-weight:700;font-size:16px}
.cohort summary span{font-weight:400;margin-left:6px}
.cohort-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;padding:6px 0 12px}
.cohort label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:700}
.cohort select{min-height:48px;padding:0 12px;border-radius:10px;border:2px solid var(--ink);background:var(--card);font-size:16px;font-weight:400}
.cohort-avg{margin:0 0 10px;font-size:15px}
.cohort .reset{font-size:15px;margin-bottom:6px}
.board-bar{position:sticky;top:var(--sticky-top);z-index:2;background:var(--bg);padding:8px 0 10px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.toggle{display:flex;padding:4px;border-radius:12px;background:oklch(0.9 0.015 80)}
.toggle button{min-height:44px;padding:0 14px;border:0;border-radius:9px;background:transparent;color:var(--ink);font-weight:700;font-size:15px;cursor:pointer}
.toggle button.is-on{background:var(--ink);color:var(--paper)}
.stories{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.stories>li{border-radius:14px;overflow:hidden;background:oklch(0.93 0.01 80)}
.story-btn{position:relative;width:100%;display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:center;text-align:left;padding:14px 16px;border:0;background:transparent;cursor:pointer;min-height:72px}
.story-fill{position:absolute;top:0;bottom:0;left:0}
.story-pct{position:relative;font-family:var(--display);font-weight:800;font-size:36px;letter-spacing:-0.03em;font-variant-numeric:tabular-nums;width:2.5em}
.story-main{position:relative}
.story-t{display:block;font-weight:700;font-size:17px;line-height:1.3;text-wrap:pretty}
.story-m{display:block;font-size:14px;margin-top:3px;color:oklch(0.3 0.02 50)}
.story-open{padding:4px 16px 18px;background:oklch(0.985 0.006 80)}
.story-open .eyebrow{font-size:14px;letter-spacing:0.05em;margin:12px 0 6px}
.story-q{margin:0 0 6px;font-size:17px;line-height:1.4}
.story-a{margin:0 0 10px;font-size:16px}
.story-e{margin:0 0 14px;font-size:15px;line-height:1.5;color:oklch(0.32 0.02 50)}
.story-links{display:flex;gap:16px;flex-wrap:wrap}
.story-links a{font-size:15px;min-height:44px;display:inline-flex;align-items:center}
.story-links a:first-child{font-weight:700}
.legend{display:flex;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:oklch(0.38 0.02 50)}
.legend i{flex:1;height:10px;border-radius:5px;background:linear-gradient(90deg,oklch(0.8 0.11 265),oklch(0.93 0.01 80),oklch(0.8 0.13 55))}

/* archive */
.arch-lede{font-size:17px;line-height:1.5;margin:0 0 20px}
.arch{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.arch li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--rule);flex-wrap:wrap}
.arch li>div{min-width:0}
.arch-l{margin:0;font-family:var(--display);font-weight:400;font-size:20px;letter-spacing:-0.01em}
.arch-l.play{font-weight:800}
.arch-s{margin:2px 0 0;font-size:14px;color:var(--muted)}
.arch-play{min-height:44px;padding:0 16px;border-radius:10px;font-weight:700}
.arch-read{min-height:44px;display:inline-flex;align-items:center;font-size:15px}

/* scores overview, attempt detail, retest */
.rt-sec{margin-top:36px}
.chips-rt{margin:4px 0 14px}
.mm{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.mm-row{padding:12px 0;border-bottom:1px solid var(--rule)}
.mm-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.mm-t{margin:0;font-family:var(--display);font-weight:800;font-size:20px;letter-spacing:-0.01em}
.mm-chg{font-size:15px;font-weight:700}
.mm-bar{position:relative;height:20px;border-radius:6px;background:oklch(0.92 0.012 80);overflow:hidden}
.mm-bar .fill{background:oklch(0.82 0.1 55)}
.mm-tick{position:absolute;top:0;bottom:0;width:3px;background:var(--ink)}
.mm-s{margin:6px 0 0;font-size:15px;color:var(--muted);font-variant-numeric:tabular-nums}
.back{margin-top:8px;font-size:15px;font-weight:700}
.res-date{margin:0 0 6px;font-size:14px;color:var(--muted)}
.res-eyebrow{margin-top:4px}
.four{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:0 0 22px}
@media (min-width:520px){.four{grid-template-columns:repeat(4,1fr)}}
.four>div{border-radius:12px;padding:12px 14px}
.four dt{font-size:14px;font-weight:700}
.four dd{margin:2px 0 0;font-family:var(--display);font-weight:800;font-size:36px;letter-spacing:-0.03em;font-variant-numeric:tabular-nums}
.four .rem,.tag.rem{background:oklch(0.86 0.1 150)}
.four .learn,.tag.learn{background:oklch(0.93 0.06 150)}
.four .forg,.tag.forg{background:oklch(0.86 0.09 25)}
.four .still,.tag.still{background:oklch(0.93 0.05 25)}
.tag{display:inline-block;margin:0 0 6px;padding:3px 8px;border-radius:6px;font-size:13px;font-weight:700;letter-spacing:0.04em;text-transform:uppercase}
.rev-from{margin:0 0 8px;font-size:14px;color:var(--muted)}

/* quiz from 1100px: explanation and next button sit beside the question, not in a bottom sheet */
@media (min-width:1100px){
  .wrap.quiz{max-width:1120px;display:grid;grid-template-columns:minmax(0,1fr) 400px;column-gap:40px;align-items:start}
  .wrap.quiz>.q-sticky,.wrap.quiz>.q-h,.wrap.quiz>.opts{grid-column:1}
  .wrap.quiz>.sheet{grid-column:2;grid-row:1 / span 3;position:static;align-self:end;display:block}
  .wrap.quiz .sheet-in{max-width:none;border-radius:22px;max-height:none;overflow:visible;box-shadow:none}
  .wrap.quiz .opts.has-sheet{padding-bottom:0}
}