html{scroll-padding-top:env(safe-area-inset-top,0px)}body{margin:0;padding:0}img{max-width:100%}[hidden]{display:none!important}
/* Layout: open sky above a desk. The ground is sky blue, deeper at the top of every page.
   White cards sit on it. One hand-written answer sheet is the only loud object; everything else stays quiet.
   Each exam carries its own colour (blue, ochre, green) from its home card through all of its pages. */
:root{
  --sky:#BDD9F5; --sky-deep:#90C0EE; --sky-pale:#E3EFFC; --haze:rgba(255,255,255,.5);
  --card:#FFFFFF; --ink:#0D1D40; --ink-2:#364669; --line:#9DBDE2; --line-2:#D8E5F5;
  --pen:#103FB4; --on-pen:#FFFFFF; --pen-wash:#E0E9FC;
  --sun:#FFCB45; --on-sun:#2B2000;
  --night:#0E2350; --on-night:#F1F6FF; --on-night-2:#B9CAEE; --night-line:rgba(255,255,255,.16);
  --margin:#D9485F; --ok:#13744A; --ok-wash:#DDF3E6; --wait:#8A5300; --wait-wash:#FBEBD0;
  --cse:#103FB4; --cse-wash:#E0E9FC; --geo:#A2500A; --geo-wash:#FBEAD3; --ifos:#13744A; --ifos-wash:#DDF3E6;
  --on-tone:#FFFFFF;
  --sheet:#FFFFFF; --rule:#C7D5EC; --scan:#FFFFFF;
  --shadow:0 1px 2px rgba(13,45,105,.08),0 14px 32px rgba(13,45,105,.13);
  --shadow-s:0 1px 2px rgba(13,45,105,.07),0 4px 14px rgba(13,45,105,.08);
  --head-bg:rgba(189,217,245,.86);

  --display:"Bricolage Grotesque","Figtree",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --body:"Figtree",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --hand:"Kalam","Segoe Print","Bradley Hand",cursive;
  --t-xs:.8125rem; --t-s:.9375rem; --t-m:1.0625rem; --t-l:1.3125rem;
  --t-xl:clamp(1.55rem,1.15rem + 1.7vw,2.2rem); --t-xxl:clamp(2.15rem,1.3rem + 3.6vw,3.6rem);
  --gap:clamp(16px,2.2vw,26px); --r-card:20px; --r-in:12px; --rule-h:32px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --sky:#0B1830; --sky-deep:#102C5C; --sky-pale:#182B52; --haze:rgba(90,140,255,.16);
    --card:#122140; --ink:#EAF1FF; --ink-2:#A9B9DA; --line:#27406F; --line-2:#22365E;
    --pen:#8DB1FF; --on-pen:#0B1830; --pen-wash:#1B2F5C;
    --sun:#FFCB45; --on-sun:#2B2000;
    --night:#142B5E; --on-night:#F1F6FF; --on-night-2:#B9CAEE; --night-line:rgba(255,255,255,.16);
    --margin:#F0798A; --ok:#62D39C; --ok-wash:#123524; --wait:#F2B761; --wait-wash:#3A2A10;
    --cse:#8DB1FF; --cse-wash:#1B2F5C; --geo:#F2B46C; --geo-wash:#3A2710; --ifos:#62D39C; --ifos-wash:#123524;
    --on-tone:#0B1830;
    --sheet:#172949; --rule:#2B3F68;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 14px 32px rgba(0,0,0,.35);
    --shadow-s:0 1px 2px rgba(0,0,0,.25),0 4px 14px rgba(0,0,0,.25);
    --head-bg:rgba(11,24,48,.82);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --sky:#0B1830; --sky-deep:#102C5C; --sky-pale:#182B52; --haze:rgba(90,140,255,.16);
  --card:#122140; --ink:#EAF1FF; --ink-2:#A9B9DA; --line:#27406F; --line-2:#22365E;
  --pen:#8DB1FF; --on-pen:#0B1830; --pen-wash:#1B2F5C;
  --sun:#FFCB45; --on-sun:#2B2000;
  --night:#142B5E; --on-night:#F1F6FF; --on-night-2:#B9CAEE; --night-line:rgba(255,255,255,.16);
  --margin:#F0798A; --ok:#62D39C; --ok-wash:#123524; --wait:#F2B761; --wait-wash:#3A2A10;
  --cse:#8DB1FF; --cse-wash:#1B2F5C; --geo:#F2B46C; --geo-wash:#3A2710; --ifos:#62D39C; --ifos-wash:#123524;
  --on-tone:#0B1830;
  --sheet:#172949; --rule:#2B3F68;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 14px 32px rgba(0,0,0,.35);
  --shadow-s:0 1px 2px rgba(0,0,0,.25),0 4px 14px rgba(0,0,0,.25);
  --head-bg:rgba(11,24,48,.82);
  color-scheme:dark;
}
[data-tone="cse"]{--tone:var(--cse);--tone-wash:var(--cse-wash)}
[data-tone="geo"]{--tone:var(--geo);--tone-wash:var(--geo-wash)}
[data-tone="ifos"]{--tone:var(--ifos);--tone-wash:var(--ifos-wash)}

*{box-sizing:border-box}
body{background:var(--sky);color:var(--ink);font-family:var(--body);font-size:var(--t-m);line-height:1.6;-webkit-font-smoothing:antialiased}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
.wrap{width:100%;min-width:0;max-width:1120px;margin-inline:auto;padding-inline:clamp(16px,4vw,32px)}
a{color:var(--pen);text-underline-offset:3px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--pen);outline-offset:3px;border-radius:8px}
h1,h2,h3{font-family:var(--display);line-height:1.12;margin:0;text-wrap:balance;letter-spacing:-.015em}
h1{font-size:var(--t-xxl);font-weight:700;letter-spacing:-.025em}
h2{font-size:var(--t-xl);font-weight:700}
h3{font-size:var(--t-l);font-weight:650}
p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
.muted{color:var(--ink-2)}
.small{font-size:var(--t-s)}
.measure{max-width:64ch}
.ic{width:1.25em;height:1.25em;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.stack{display:flex;flex-direction:column;gap:var(--gap);min-width:0}
.stack > *{min-width:0}

/* buttons and chips */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:650;font-size:var(--t-s);line-height:1.2;text-decoration:none;cursor:pointer;
  background:var(--pen);color:var(--on-pen);border:1.5px solid var(--pen);border-radius:999px;padding:11px 20px;box-shadow:var(--shadow-s);transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn:active{transform:none}
.btn.ghost{background:var(--card);color:var(--ink);border-color:var(--line)}
.btn.sun{background:var(--sun);color:var(--on-sun);border-color:var(--sun)}
.btn.onnight{background:transparent;color:var(--on-night);border-color:var(--night-line);box-shadow:none}
.btn.onnight:hover{background:rgba(255,255,255,.1)}
.btn.sm{padding:8px 15px;font-size:var(--t-xs)}
.chip{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;font-size:var(--t-xs);font-weight:650;line-height:1.3;padding:3px 10px;border-radius:999px;white-space:nowrap;background:var(--sky-pale);color:var(--ink-2)}
.chip.ok{background:var(--ok-wash);color:var(--ok)}
.chip.wait{background:var(--wait-wash);color:var(--wait)}
.chip.sun{background:var(--sun);color:var(--on-sun)}
.link{display:inline-flex;align-items:center;gap:4px;font-weight:650;font-size:var(--t-s);color:var(--pen);text-decoration:none}
.link:hover{text-decoration:underline}
.link .ic{width:1em;height:1em;stroke-width:2.2}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--head-bg);-webkit-backdrop-filter:saturate(1.4) blur(12px);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:10px 20px;padding-block:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);margin-right:auto;flex:none}
.brand svg{width:38px;height:38px;flex:none;border-radius:10px}
.logo-tile{fill:var(--night)}
.logo-ring{fill:none;stroke:var(--sun)}
footer .logo-tile,.cover .logo-tile{fill:rgba(255,255,255,.12)}
.brand b{display:block;font-family:var(--display);font-weight:750;font-size:1.25rem;letter-spacing:-.01em;line-height:1.1;white-space:nowrap}
.brand small{display:block;font-size:var(--t-xs);color:var(--ink-2);line-height:1.2;white-space:nowrap}
.nav{display:flex;gap:2px}
.nav a{font-size:var(--t-s);font-weight:600;color:var(--ink-2);text-decoration:none;padding:7px 12px;border-radius:999px;white-space:nowrap;transition:background-color .16s ease,color .16s ease}
.nav a:hover{color:var(--ink);background:var(--sky-pale)}
.nav a[aria-current="page"]{color:var(--on-pen);background:var(--pen)}
.menu-btn{display:none;align-items:center;gap:8px;font:inherit;font-size:var(--t-s);font-weight:650;color:var(--ink);background:var(--card);border:1.5px solid var(--line);border-radius:999px;padding:8px 14px;cursor:pointer}
.drawer{border-top:1px solid var(--line);background:var(--card);max-height:calc(100vh - 70px);overflow-y:auto}
.drawer .wrap{display:flex;flex-direction:column;gap:4px;padding-block:14px 20px}
.drawer a{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:600;padding:10px 12px;border-radius:var(--r-in)}
.drawer a:hover{background:var(--sky-pale)}
.drawer a.sub{font-weight:500;font-size:var(--t-s);color:var(--ink-2);padding:7px 12px 7px 46px}
.drawer hr{border:0;border-top:1px solid var(--line-2);margin:6px 0;width:100%}
@media (max-width:1000px){.nav,.top .tg{display:none}.menu-btn{display:inline-flex}}
@media (min-width:1001px){.drawer{display:none}}
@media (max-width:380px){.brand small{display:none}}

/* page frame */
main:focus{outline:none}
.skytop{background:radial-gradient(70% 90% at 88% 0%,var(--haze),transparent 62%),linear-gradient(180deg,var(--sky-deep),var(--sky))}
.sect{padding-block:clamp(36px,5.5vw,68px)}
.sect-head{display:flex;flex-direction:column;gap:8px;margin-bottom:var(--gap)}
.sect-head p{color:var(--ink-2);max-width:62ch}
.card{background:var(--card);border-radius:var(--r-card);box-shadow:var(--shadow-s)}
@media (prefers-reduced-motion:no-preference){.fade{animation:fade .22s ease both}@keyframes fade{from{opacity:0}to{opacity:1}}}

/* home: hero */
.hero{padding-block:clamp(22px,4vw,44px) clamp(30px,5vw,56px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);grid-template-areas:"strip strip" "copy sheet" "exams exams";gap:clamp(22px,4vw,44px) clamp(28px,5vw,60px);align-items:center}
.strip{grid-area:strip;display:flex;align-items:center;gap:10px;justify-self:start;max-width:100%;background:var(--card);color:var(--ink);text-decoration:none;font-size:var(--t-s);font-weight:550;line-height:1.35;border-radius:999px;padding:6px 14px 6px 6px;box-shadow:var(--shadow-s)}
.strip > span:nth-child(2){min-width:0}
.strip .ic{color:var(--ink-2);width:1em;height:1em}
.strip:hover{box-shadow:var(--shadow)}
.hero-copy{grid-area:copy;display:flex;flex-direction:column;gap:20px;min-width:0}
.kicker{font-weight:650;color:var(--pen);font-size:var(--t-s)}
.lede{font-size:var(--t-l);line-height:1.5;color:var(--ink-2);max-width:54ch}
.byline{display:flex;align-items:center;gap:12px;font-size:var(--t-s);color:var(--ink-2);line-height:1.4}
.byline b{color:var(--ink)}
.avatar{flex:none;width:46px;height:46px;border-radius:50%;background:var(--night);color:var(--sun);display:grid;place-items:center;font-family:var(--display);font-weight:800;font-size:.8rem;letter-spacing:.02em;object-fit:cover;box-shadow:0 0 0 3px var(--card)}
.avatar.big{width:132px;height:132px;font-size:2rem;box-shadow:0 0 0 5px var(--card),var(--shadow)}
.hero-sheet{grid-area:sheet;min-width:0}
.exams-wrap{grid-area:exams;display:flex;flex-direction:column;gap:16px;min-width:0;scroll-margin-top:84px}
.exams{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
@media (max-width:940px){
  .hero-grid{grid-template-columns:minmax(0,1fr);grid-template-areas:"strip" "copy" "exams" "sheet"}
  .exams{grid-template-columns:minmax(0,1fr)}
}

/* exam cards */
.exam{display:flex;flex-direction:column;gap:16px;padding:22px;min-width:0;transition:transform .2s ease,box-shadow .2s ease}
.exam:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.exam-head{display:flex;align-items:flex-start;gap:12px}
.exam-head > div{min-width:0;flex:1}
.exam h3 a{color:inherit;text-decoration:none}
.exam h3 a:hover{color:var(--tone)}
.exam-head p{font-size:var(--t-s);color:var(--ink-2);line-height:1.35;margin-top:2px}
.emblem{flex:none;width:46px;height:46px;border-radius:14px;background:var(--tone-wash);color:var(--tone);display:grid;place-items:center}
.emblem .ic{width:24px;height:24px}
.exam-facts{font-size:var(--t-s);color:var(--ink-2)}
.parts{display:flex;flex-direction:column;gap:8px;margin-top:auto}
.parts a{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);background:var(--sky-pale);border-radius:var(--r-in);padding:10px 12px;transition:background-color .16s ease}
.parts a:hover{background:var(--tone-wash)}
.parts b{font-family:var(--display);font-weight:700;color:var(--tone);white-space:nowrap;min-width:4.6em}
.parts span{font-size:var(--t-s);line-height:1.3;min-width:0;flex:1}
.parts .ic{color:var(--tone);width:1.05em;height:1.05em;stroke-width:2.2}

/* the answer sheet */
.sheet{background:var(--sheet);border-radius:4px;box-shadow:var(--shadow);min-width:0;max-width:100%;overflow:hidden}
@media (min-width:941px){.hero-sheet .sheet{transform:rotate(1.1deg)}}
.sheet-print{padding:16px 20px 14px;border-bottom:2px solid var(--ink);display:flex;flex-direction:column;gap:6px}
.sheet-print small{font-size:var(--t-xs);font-weight:650;color:var(--ink-2)}
.sheet-q{font-family:var(--display);font-weight:550;font-size:var(--t-m);line-height:1.4}
.sheet-lines{position:relative;padding:0 16px var(--rule-h) 54px;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(var(--rule-h) - 1px),var(--rule) calc(var(--rule-h) - 1px),var(--rule) var(--rule-h))}
.sheet-lines::before{content:"";position:absolute;inset-block:0;left:40px;width:2px;background:var(--margin);opacity:.75}
.sheet svg{display:block;width:100%;height:auto;background:var(--sheet);margin-top:var(--rule-h);border:1px dashed var(--rule)}
.hand{position:relative;font-family:var(--hand);font-size:1.16rem;line-height:var(--rule-h);color:var(--pen)}
.hand u{text-decoration-thickness:2px;text-underline-offset:4px}
.hand::before{content:"\2713";position:absolute;left:-36px;color:var(--margin);font-weight:700}
.sheet figcaption{padding:10px 20px 12px;border-top:1px solid var(--rule);font-size:var(--t-xs);color:var(--ink-2)}
.d-axis{stroke:var(--ink-2);stroke-width:1.5;fill:none}
.d-curve{stroke:var(--pen);stroke-width:2.6;fill:none;stroke-linecap:round}
.d-dash{stroke:var(--ink-2);stroke-width:1.2;stroke-dasharray:4 4;fill:none}
.d-t{font-family:var(--hand);font-size:15px;fill:var(--pen)}
.d-a{font-family:var(--body);font-size:11px;fill:var(--ink-2);letter-spacing:.06em}
.d-head{fill:var(--ink-2)}
@media (prefers-reduced-motion:no-preference){.d-curve{stroke-dasharray:1;animation:draw 1.5s ease-out both}@keyframes draw{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}}

/* night band */
.band{background:var(--night);color:var(--on-night)}
.band h2{color:var(--on-night)}
.band p{color:var(--on-night-2)}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap);padding-block:clamp(26px,4vw,40px)}
.stats > div{display:flex;flex-direction:column;gap:2px;min-width:0}
.stats b{font-family:var(--display);font-weight:750;font-size:var(--t-xxl);line-height:1;color:var(--sun);font-variant-numeric:tabular-nums}
.stats span{font-size:var(--t-s);color:var(--on-night-2)}
@media (max-width:700px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* inside every paper */
.inside{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.inside li{display:flex;gap:12px;align-items:flex-start;padding:16px;min-width:0}
.inside li:first-child{grid-column:span 2}
.inside .emb{flex:none;width:38px;height:38px;border-radius:12px;background:var(--pen-wash);color:var(--pen);display:grid;place-items:center}
.inside b{display:block;font-family:var(--display);font-weight:700}
.inside span{display:block;font-size:var(--t-s);color:var(--ink-2);line-height:1.4}
@media (max-width:940px){.inside{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.inside{grid-template-columns:minmax(0,1fr)}.inside li:first-child{grid-column:auto}}

/* mentor */
.mentor{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(20px,4vw,44px);align-items:center;padding:clamp(22px,4vw,40px)}
.mentor-body{display:flex;flex-direction:column;gap:14px;min-width:0}
.creds{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.creds li{background:var(--sky-pale);border-radius:var(--r-in);padding:10px 14px;min-width:0}
.creds b{display:block;font-family:var(--display);font-weight:700;line-height:1.25}
.creds span{font-size:var(--t-s);color:var(--ink-2);line-height:1.35;display:block}
@media (max-width:700px){.mentor{grid-template-columns:minmax(0,1fr);justify-items:start}.creds{grid-template-columns:minmax(0,1fr)}}

/* notice board and posts */
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,48px);align-items:start}
@media (max-width:860px){.two{grid-template-columns:minmax(0,1fr)}}
.notices{display:flex;flex-direction:column;padding:6px 20px}
.notices li{display:flex;gap:6px 16px;justify-content:space-between;align-items:baseline;padding-block:13px;border-bottom:1px solid var(--line-2)}
.notices li:last-child{border-bottom:0}
.notices span{flex:1 1 24ch;min-width:0}
.posts{display:flex;flex-direction:column;gap:12px}
.post{display:flex;flex-direction:column;gap:6px;padding:18px 20px;text-decoration:none;color:var(--ink);min-width:0;transition:transform .2s ease,box-shadow .2s ease}
a.post:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.post h3{font-size:1.15rem}
.post p{font-size:var(--t-s);color:var(--ink-2)}
.post-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:var(--t-xs);color:var(--ink-2)}

/* channels */
.channels{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.channel{display:flex;flex-direction:column;gap:6px;padding:18px;text-decoration:none;color:var(--ink);min-width:0;font:inherit;text-align:left;border:0;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}
.channel:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.channel .emb{width:40px;height:40px;border-radius:12px;background:var(--pen-wash);color:var(--pen);display:grid;place-items:center;margin-bottom:4px}
.channel b{font-family:var(--display);font-weight:700}
.channel span{font-size:var(--t-s);color:var(--pen);overflow-wrap:anywhere;line-height:1.35}
.channel small{font-size:var(--t-xs);color:var(--ink-2);line-height:1.4}
.band .channel{background:rgba(255,255,255,.07);color:var(--on-night);box-shadow:none;border:1px solid var(--night-line)}
.band .channel .emb{background:rgba(255,255,255,.1);color:var(--sun)}
.band .channel span{color:var(--sun)}
.band .channel small{color:var(--on-night-2)}
@media (max-width:860px){.channels{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:420px){.channels{grid-template-columns:minmax(0,1fr)}}

/* faq */
.faq{display:flex;flex-direction:column;padding:4px 20px;max-width:820px}
.faq details{border-bottom:1px solid var(--line-2)}
.faq details:last-child{border-bottom:0}
.faq summary{display:flex;justify-content:space-between;align-items:center;gap:16px;cursor:pointer;list-style:none;font-family:var(--display);font-weight:650;font-size:1.1rem;padding-block:15px}
.faq summary::-webkit-details-marker{display:none}
.faq summary .ic{color:var(--ink-2);transition:transform .2s ease;transform:rotate(90deg)}
.faq details[open] summary .ic{transform:rotate(-90deg)}
.faq details p{color:var(--ink-2);padding-bottom:16px;max-width:64ch}

/* exam page */
.exam-top{padding-block:clamp(18px,3vw,30px) clamp(22px,3.5vw,36px)}
.exam-top .wrap{display:flex;flex-direction:column;gap:18px}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:var(--t-s);color:var(--ink-2)}
.crumbs a{color:var(--ink-2);text-decoration:none;font-weight:600}
.crumbs a:hover{color:var(--ink);text-decoration:underline}
.crumbs .ic{width:.9em;height:.9em}
.exam-title{display:flex;gap:16px;align-items:center}
.exam-title .emblem{width:58px;height:58px;border-radius:18px;background:var(--card);box-shadow:var(--shadow-s)}
.exam-title .emblem .ic{width:30px;height:30px}
.exam-title h1{font-size:var(--t-xl)}
.exam-title p{color:var(--ink-2);font-weight:550}
.facts{display:flex;flex-wrap:wrap;gap:8px}
.facts li{background:var(--card);border-radius:999px;padding:6px 14px;font-size:var(--t-s);color:var(--ink-2);box-shadow:var(--shadow-s)}
.facts b{color:var(--ink);font-family:var(--display);font-weight:700;font-variant-numeric:tabular-nums}
.stages{display:flex;flex-wrap:wrap;gap:8px}
.stages a{display:inline-flex;align-items:baseline;gap:8px;text-decoration:none;color:var(--ink);background:var(--card);border-radius:999px;padding:8px 18px;box-shadow:var(--shadow-s);transition:background-color .16s ease,color .16s ease}
.stages a:hover{background:var(--tone-wash)}
.stages small{font-size:var(--t-xs);font-weight:650;color:var(--ink-2)}
.stages b{font-family:var(--display);font-weight:700;font-size:1.05rem}
.stages a[aria-current="true"]{background:var(--tone);color:var(--on-tone)}
.stages a[aria-current="true"] small{color:var(--on-tone);opacity:.88}
.panel{scroll-margin-top:84px}
.seg{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:6px;background:var(--card);border-radius:18px;padding:6px;box-shadow:var(--shadow-s)}
.seg a{display:flex;flex-direction:column;gap:1px;text-decoration:none;color:var(--ink);border-radius:13px;padding:10px 16px;min-width:0;transition:background-color .16s ease,color .16s ease}
.seg a:hover{background:var(--tone-wash)}
.seg b{font-family:var(--display);font-weight:700;font-size:1.1rem;line-height:1.2}
.seg span{font-size:var(--t-s);color:var(--ink-2);line-height:1.3}
.seg a[aria-current="true"]{background:var(--tone);color:var(--on-tone)}
.seg a[aria-current="true"] span{color:var(--on-tone);opacity:.88}
.seg-scope{display:none;font-size:var(--t-s);color:var(--ink-2)}
@media (max-width:640px){.seg a{align-items:center;text-align:center;padding:9px 8px}.seg span{display:none}.seg-scope{display:block}}

.exam-body{display:flex;flex-direction:column;gap:14px;padding-block:6px clamp(36px,5vw,64px)}
.tabs{scroll-margin-top:84px;display:flex;gap:6px;overflow-x:auto;padding:4px 2px 8px;margin-inline:-2px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs a{flex:none;display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:650;font-size:var(--t-s);color:var(--ink);background:var(--card);border-radius:999px;padding:9px 16px;box-shadow:var(--shadow-s);transition:background-color .16s ease,color .16s ease}
.tabs a:hover{background:var(--tone-wash)}
.tabs a[aria-current="true"]{background:var(--tone);color:var(--on-tone)}
.panel{padding:clamp(18px,3.4vw,36px);display:flex;flex-direction:column;gap:clamp(20px,3vw,30px);min-width:0;border-radius:24px}
.panel > *{min-width:0}
.sec-head{display:flex;flex-direction:column;gap:6px}
.sec-head p{color:var(--ink-2);max-width:64ch}
.sec-head .sub{font-weight:650;color:var(--tone);font-size:var(--t-s)}

/* year rows */
.years{display:flex;flex-direction:column;border:1px solid var(--line-2);border-radius:16px;overflow:hidden}
.year{display:grid;grid-template-columns:5.2rem minmax(0,16rem) minmax(0,1fr);gap:8px 16px;align-items:center;padding:12px 18px;border-bottom:1px solid var(--line-2)}
.year:last-child{border-bottom:0}
.year.yhead{background:var(--sky-pale);font-size:var(--t-xs);font-weight:650;color:var(--ink-2);padding-block:8px}
.year .yr{font-family:var(--display);font-weight:750;font-size:1.35rem;font-variant-numeric:tabular-nums;line-height:1}
.year .sol{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;font-size:var(--t-s)}
.year .qpc{font-size:var(--t-s);display:flex;flex-wrap:wrap;gap:6px 8px;align-items:center}
@media (max-width:640px){.year{grid-template-columns:3.6rem minmax(0,1fr);padding:12px 12px;gap:8px 10px}.year .yr{grid-row:1 / span 2;align-self:start;padding-top:6px}.year .sol{grid-column:2}.year.yhead{display:none}.year .btn.sm{padding:7px 11px}}

/* question paper reader */
.qp-bar{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;font-size:var(--t-s)}
.qp-sol{display:inline-flex;flex-wrap:wrap;gap:6px 12px;align-items:center;font-size:var(--t-s);background:var(--sky-pale);border-radius:var(--r-in);padding:8px 14px}
.qp-sol b{font-family:var(--display)}
.qp{display:flex;flex-direction:column;gap:16px;align-items:center}
.qp figure{width:100%;max-width:940px;display:flex;flex-direction:column;gap:4px}
.qp img{display:block;width:100%;height:auto;background:var(--scan);border:1px solid var(--line-2);border-radius:6px;box-shadow:var(--shadow-s)}
.shield{position:relative;border-radius:6px}
.locked img{pointer-events:none;-webkit-user-select:none;user-select:none;-webkit-user-drag:none;-webkit-touch-callout:none}
.locked .shield::after{content:"";position:absolute;inset:0}
.qp figcaption{font-size:var(--t-xs);color:var(--ink-2);text-align:center}
.qp-nav{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center}
.qp-nav > :last-child{justify-self:end}
.qp-nav > :first-child{justify-self:start}
@media (max-width:640px){.qp{margin-inline:-10px}}

/* book callout */
.book{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(16px,3vw,28px);align-items:center;background:var(--sky-pale);border-radius:18px;padding:clamp(16px,3vw,24px)}
.cover{width:112px;aspect-ratio:3/4;border-radius:4px 10px 10px 4px;background:var(--night);color:var(--on-night);box-shadow:var(--shadow);padding:12px 10px 10px 16px;display:flex;flex-direction:column;justify-content:space-between;border-left:5px solid var(--sun)}
.cover svg{width:26px;height:26px}
.cover b{font-family:var(--display);font-weight:750;font-size:.95rem;line-height:1.15;display:block}
.cover small{font-size:.66rem;color:var(--on-night-2);line-height:1.3;display:block}
.book-body{display:flex;flex-direction:column;gap:10px;min-width:0}
.book-body h3{font-size:1.15rem}
.dots{display:flex;flex-direction:column;gap:3px;font-size:var(--t-s);color:var(--ink-2)}
.dots li{padding-left:16px;position:relative}
.dots li::before{content:"";position:absolute;left:2px;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--tone,var(--pen))}
@media (max-width:520px){.book{grid-template-columns:minmax(0,1fr)}.cover{width:92px}}

/* empty state and note */
.empty{display:flex;flex-direction:column;gap:12px;align-items:flex-start;background:var(--sky-pale);border-radius:18px;padding:clamp(18px,3vw,28px)}
.empty .emb{width:44px;height:44px;border-radius:14px;background:var(--tone-wash,var(--pen-wash));color:var(--tone,var(--pen));display:grid;place-items:center}
.empty p{color:var(--ink-2);max-width:58ch}
.note{background:var(--sky-pale);border-radius:var(--r-in);padding:12px 16px;font-size:var(--t-s);color:var(--ink-2);max-width:72ch}
.note b{color:var(--ink)}

/* syllabus and topic lists */
.units{display:flex;flex-direction:column;gap:8px}
.units li{display:flex;gap:14px;align-items:baseline;background:var(--sky-pale);border-radius:var(--r-in);padding:12px 16px;min-width:0}
.units .n{flex:none;min-width:2.2em;font-family:var(--display);font-weight:750;color:var(--tone);font-variant-numeric:tabular-nums;white-space:nowrap}
.units li > div{min-width:0;flex:1}
.units b{font-family:var(--display);font-weight:700;font-size:1.08rem;display:block}
.units p{color:var(--ink-2);font-size:var(--t-s);line-height:1.6;margin-top:3px;max-width:86ch}
.unit-group{display:flex;flex-direction:column;gap:10px}
.unit-group h3{font-size:1.2rem}
@media (max-width:640px){.units li{flex-direction:column;gap:2px;padding:12px 14px}}
.topics{display:flex;flex-direction:column;border:1px solid var(--line-2);border-radius:16px;overflow:hidden}
.topics li{display:flex;flex-wrap:wrap;gap:6px 16px;justify-content:space-between;align-items:center;padding:11px 18px;border-bottom:1px solid var(--line-2)}
.topics li:last-child{border-bottom:0}
.topics li > span:first-child{flex:1 1 20ch;min-width:0}
.topics .act{display:flex;gap:10px;align-items:center;font-size:var(--t-s)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;counter-reset:s}
.steps li{counter-increment:s;background:var(--sky-pale);border-radius:16px;padding:16px;font-size:var(--t-s);color:var(--ink-2);min-width:0}
.steps li::before{content:counter(s);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--tone,var(--pen));color:var(--on-tone);font-family:var(--display);font-weight:750;font-size:var(--t-s);margin-bottom:10px}
.steps b{display:block;font-family:var(--display);font-size:var(--t-m);color:var(--ink);margin-bottom:2px}
.block{display:flex;flex-direction:column;gap:10px}
.block > p{color:var(--ink-2);max-width:64ch}

/* forum */
.boards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.boards li{background:var(--sky-pale);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:6px;min-width:0}
.boards .emb{width:36px;height:36px;border-radius:11px;background:var(--card);color:var(--tone);display:grid;place-items:center;margin-bottom:4px}
.boards b{font-family:var(--display);font-weight:700}
.boards span{font-size:var(--t-s);color:var(--ink-2);line-height:1.45}
@media (max-width:760px){.boards{grid-template-columns:minmax(0,1fr)}}
.rules{display:flex;flex-direction:column;gap:6px;color:var(--ink-2);font-size:var(--t-s)}
.rules li{display:flex;gap:10px;align-items:flex-start}
.rules .ic{color:var(--ok);margin-top:.2em;width:1.05em;height:1.05em;stroke-width:2.4}

/* blog */
.cats{display:flex;flex-wrap:wrap;gap:8px}
.cats button{font:inherit;font-size:var(--t-s);font-weight:650;cursor:pointer;color:var(--ink-2);background:var(--sky-pale);border:0;border-radius:999px;padding:7px 14px;transition:background-color .16s ease,color .16s ease}
.cats button:hover{color:var(--ink)}
.cats button[aria-pressed="true"]{background:var(--ink);color:var(--card)}
.cats button small{font-size:var(--t-xs);font-weight:600;opacity:.7;margin-left:4px}
.panel .post{background:var(--sky-pale);border-radius:16px;box-shadow:none}
.panel a.post:hover{background:var(--tone-wash);transform:none;box-shadow:none}
.article{display:flex;flex-direction:column;gap:14px;max-width:68ch}
.article h2{font-size:var(--t-xl)}
.article h3{margin-top:10px;font-size:1.2rem}
.article ul,.article ol{padding-left:1.3em;display:flex;flex-direction:column;gap:4px}
.article ul{list-style:disc}.article ol{list-style:decimal}

/* inner pages */
.page-top{padding-block:clamp(22px,4vw,44px)}
.page-top .wrap{display:flex;flex-direction:column;gap:12px}
.page-body{padding-block:8px clamp(36px,5vw,64px)}
.page-body > .wrap{display:flex;flex-direction:column;gap:clamp(24px,4vw,40px)}
.about{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:clamp(20px,4vw,40px);align-items:start}
@media (max-width:860px){.about{grid-template-columns:minmax(0,1fr)}}
.about-main{padding:clamp(20px,3.4vw,36px);display:flex;flex-direction:column;gap:18px;min-width:0}
.about-main p{max-width:62ch}
.about-id{display:flex;flex-wrap:wrap;gap:18px;align-items:center}
.side{padding:22px;display:flex;flex-direction:column;gap:14px;min-width:0}
.mail{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.mail code{font-family:var(--body);font-weight:700;font-size:var(--t-m);user-select:all;overflow-wrap:anywhere}
.ways{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.ways li{padding:18px;min-width:0}
.ways b{display:block;font-family:var(--display);font-weight:700;margin-bottom:4px}
.ways span{font-size:var(--t-s);color:var(--ink-2);display:block;line-height:1.5}
@media (max-width:760px){.ways{grid-template-columns:minmax(0,1fr)}}
.policy{padding:clamp(20px,3.4vw,36px);display:flex;flex-direction:column;gap:26px}
.policy section{display:flex;flex-direction:column;gap:8px;max-width:70ch}
.policy ul{list-style:disc;padding-left:1.2em;display:flex;flex-direction:column;gap:4px;color:var(--ink-2)}
.fill{background:var(--sun);color:var(--on-sun);padding:0 5px;border-radius:4px;font-weight:650}

/* footer */
footer{background:var(--night);color:var(--on-night-2);font-size:var(--t-s)}
.foot{display:grid;grid-template-columns:minmax(0,1.3fr) repeat(3,minmax(0,1fr));gap:var(--gap) clamp(20px,4vw,48px);padding-block:clamp(30px,5vw,52px) 22px}
.foot h3{font-size:var(--t-s);color:var(--on-night);font-family:var(--body);font-weight:700;letter-spacing:0;margin-bottom:10px}
.foot ul{display:flex;flex-direction:column;gap:7px}
.foot a{color:var(--on-night-2);text-decoration:none}
.foot a:hover{color:var(--on-night);text-decoration:underline}
.foot .brand{color:var(--on-night);margin-bottom:12px}
.foot .brand small{color:var(--on-night-2)}
.foot-end{border-top:1px solid var(--night-line);padding-block:16px 26px;display:flex;flex-wrap:wrap;gap:6px 24px;justify-content:space-between}
@media (max-width:800px){.foot{grid-template-columns:repeat(2,minmax(0,1fr))}.foot > div:first-child{grid-column:1 / -1}}

/* books */
.bk-cover{display:block;width:100%;height:auto;aspect-ratio:5/8;object-fit:cover;border-radius:4px 10px 10px 4px;box-shadow:var(--shadow);background:var(--night)}
.cover.bk-cover{width:100%;aspect-ratio:5/8;padding:10% 8% 8% 12%}
.cover.bk-cover svg{width:30%;height:auto}
.cover.bk-cover b{font-size:clamp(.9rem,.6rem + 1.2vw,1.35rem)}
.cover.bk-cover small{font-size:clamp(.62rem,.5rem + .4vw,.8rem)}
.book .bk-cover{width:112px}
.book-cover-link{display:block;width:112px}
@media (max-width:520px){.book .bk-cover,.book-cover-link{width:92px}}
.book-lead{font-size:var(--t-s);color:var(--ink-2);max-width:64ch}
.reader-book{margin-top:8px}
.price{font-family:var(--display);font-weight:750;font-size:var(--t-l)}
.price small{font-family:var(--body);font-weight:500;font-size:var(--t-xs);color:var(--ink-2);margin-left:6px}
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,430px),1fr));gap:var(--gap)}
.shelf-card{display:grid;grid-template-columns:132px minmax(0,1fr);gap:18px;padding:18px;align-items:start}
.shelf-card .book-body h3 a{color:inherit;text-decoration:none}
.shelf-card .book-body h3 a:hover{text-decoration:underline}
@media (max-width:420px){.shelf-card{grid-template-columns:96px minmax(0,1fr);gap:14px;padding:14px}}
.home-books{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--gap);align-items:end}
@media (max-width:700px){.home-books{grid-template-columns:minmax(0,1fr)}}
.bk-hero{display:grid!important;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:clamp(22px,4vw,52px);align-items:start}
.bk-hero-copy{display:flex;flex-direction:column;gap:14px;min-width:0}
.bk-hero-copy h1{font-size:var(--t-xl)}
.bk-hero-cover{position:sticky;top:90px}
@media (max-width:760px){.bk-hero{grid-template-columns:minmax(0,1fr)}.bk-hero-cover{position:static;max-width:150px}}
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.compare li{padding:18px;min-width:0;display:flex;flex-direction:column;gap:8px}
.compare li.pick{outline:2px solid var(--sun)}
.compare b{font-family:var(--display);font-weight:700}
@media (max-width:640px){.compare{grid-template-columns:minmax(0,1fr)}}
.sample-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:end}
.buybar{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;background:var(--card);border-radius:18px;padding:16px 20px;box-shadow:var(--shadow-s)}
.nav a.nav-new::after{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--sun);margin-left:6px;vertical-align:middle;box-shadow:0 0 0 2px var(--card)}

/* ---- question pages, topic pages, question lists (added Oct 2026) ---- */
.exam-title .h1{font-family:var(--display);font-size:var(--t-xl);font-weight:700;line-height:1.12;letter-spacing:-.015em;color:var(--ink)}
.qa{display:flex;flex-direction:column;gap:var(--gap);min-width:0}
.qa-h{font-size:var(--t-xl);font-weight:700;letter-spacing:-.015em}
.qa-crumbs{margin-bottom:-6px}
.qa-meta{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;font-size:var(--t-s);color:var(--ink-2);margin-top:6px}
.qa-meta b{color:var(--ink);font-family:var(--display)}
.qa-meta a{color:var(--pen);font-weight:650}
.qa-q{background:var(--sky-pale);border-left:4px solid var(--tone,var(--pen));border-radius:var(--r-in);padding:14px 18px;display:flex;flex-direction:column;gap:6px}
.qa-q p{line-height:1.65;max-width:80ch}
.qa-tag{font-size:var(--t-xs);font-weight:750;letter-spacing:.06em;text-transform:uppercase;color:var(--tone,var(--pen))}
.qa-ans{display:flex;flex-direction:column;gap:10px}
.qa-ans h3:not(:first-child){margin-top:8px}
.qa-ans h3{font-size:var(--t-m)}
.qa-lead{font-size:var(--t-m);font-weight:600;line-height:1.55;max-width:80ch}
.qa-points{font-size:var(--t-m);gap:6px;max-width:80ch}
.qa-kw{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.qa-kw .muted{margin-right:4px}
.qlist{padding:0;overflow:hidden}
.qlist > summary{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;list-style:none;padding:14px 18px}
.qlist > summary::-webkit-details-marker{display:none}
.qlist > summary span{display:flex;flex-direction:column;gap:2px}
.qlist > summary small{font-size:var(--t-xs);color:var(--ink-2)}
.qlist > summary .ic{flex:none;transition:transform .18s ease}
.qlist[open] > summary .ic{transform:rotate(90deg)}
.qgroup{padding:4px 18px 14px;border-top:1px solid var(--line-2)}
.qgroup h3{font-size:var(--t-m);padding:10px 0 6px}
.qgroup h3 small{font-family:var(--body);font-weight:500;font-size:var(--t-xs);color:var(--ink-2);margin-left:6px}
.qgroup ul{display:flex;flex-direction:column}
.qgroup a{display:grid;grid-template-columns:5.2em minmax(0,1fr) auto;gap:10px;align-items:baseline;text-decoration:none;color:var(--ink);padding:7px 8px;border-radius:8px;font-size:var(--t-s)}
.qgroup a:hover{background:var(--sky-pale)}
.qgroup .qid{font-weight:700;color:var(--tone,var(--pen));font-variant-numeric:tabular-nums}
.qgroup .qm{color:var(--ink-2);font-size:var(--t-xs);white-space:nowrap}
.tlist .link{display:inline;font-size:var(--t-m)}
.tlist .link b{color:var(--tone,var(--pen));margin-right:6px}
@media (max-width:640px){.qgroup a{grid-template-columns:4.4em minmax(0,1fr)}.qgroup .qm{display:none}.qa-q{padding:12px 14px}}