@font-face{font-family:Poppins;font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/poppins-400-latin.woff2) format("woff2")}
@font-face{font-family:Poppins;font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/poppins-600-latin.woff2) format("woff2")}
@font-face{font-family:Poppins;font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/poppins-700-latin.woff2) format("woff2")}

:root{
  --brand:#FF5A1F;--brand-ink:#B83A0B;--on-brand:#111111;
  --bg:#F7F7F7;--surface:#FFFFFF;--ink:#111111;--text:#333333;--muted:#5C5C5C;--line:#E5E5E5;
  --ok:#137A3B;--ok-bg:#E7F6EC;--bad:#B42318;--bad-bg:#FDECEA;--warn-bg:#FFF4E5;--warn:#8A4B00;
  --focus:#1A56DB;--radius:14px;--shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.05);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --brand:#FF6A33;--brand-ink:#FF9A73;--on-brand:#111111;
  --bg:#0F1012;--surface:#1A1B1E;--ink:#F5F5F5;--text:#D6D6D6;--muted:#A3A3A3;--line:#2E3035;
  --ok:#5BD58A;--ok-bg:#12301E;--bad:#FF8A80;--bad-bg:#3A1714;--warn-bg:#352611;--warn:#FFC77A;--focus:#8AB4FF;
  --shadow:0 1px 2px rgba(0,0,0,.4);color-scheme:dark}}
:root[data-theme=dark]{
  --brand:#FF6A33;--brand-ink:#FF9A73;--on-brand:#111111;
  --bg:#0F1012;--surface:#1A1B1E;--ink:#F5F5F5;--text:#D6D6D6;--muted:#A3A3A3;--line:#2E3035;
  --ok:#5BD58A;--ok-bg:#12301E;--bad:#FF8A80;--bad-bg:#3A1714;--warn-bg:#352611;--warn:#FFC77A;--focus:#8AB4FF;
  --shadow:0 1px 2px rgba(0,0,0,.4);color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Poppins,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;font-size:1rem;line-height:1.6;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
h1,h2,h3{color:var(--ink);line-height:1.25;margin:0 0 .5em;font-weight:700}
h1{font-size:clamp(1.75rem,5vw,2.5rem)}h2{font-size:1.25rem;font-weight:600}.h3{font-size:1.05rem;font-weight:600}
p{margin:0 0 .75em}
a{color:var(--brand-ink)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:-999px;top:8px;background:var(--surface);color:var(--ink);padding:8px 12px;border-radius:8px;z-index:100}.skip:focus{left:8px}
.wrap{width:100%;max-width:1040px;margin:0 auto;padding:0 16px}
main{flex:1;padding-bottom:40px}
[hidden]{display:none!important}

.topbar{background:var(--surface);border-bottom:1px solid var(--line)}
.topbar-in{display:flex;align-items:center;justify-content:space-between;min-height:60px;padding-right:132px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--ink);text-decoration:none}
.logo{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--brand);color:var(--on-brand);font-weight:700;font-size:.85rem}
.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.i-sun{display:none}
:root[data-theme=dark] .i-sun{display:block}:root[data-theme=dark] .i-moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .i-sun{display:block}:root:not([data-theme=light]) .i-moon{display:none}}

/* Floating sticky timer: top-right on every viewport */
.timer{position:fixed;top:max(8px,env(safe-area-inset-top));right:max(8px,env(safe-area-inset-right));z-index:50;display:flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:999px;background:var(--ink);color:var(--surface);font-weight:600;font-variant-numeric:tabular-nums;font-size:1.05rem;box-shadow:0 4px 18px rgba(0,0,0,.18)}
.timer.warning{background:#8A4B00;color:#fff}
.timer.critical{background:#B42318;color:#fff}
@media (prefers-reduced-motion:no-preference){.timer.critical{animation:pulse 1s ease-in-out infinite}}
@keyframes pulse{50%{transform:scale(1.04)}}
body.in-exam .topbar-in{padding-right:132px}

.hero{padding:32px 0 8px}
.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:.78rem;font-weight:600;color:var(--brand-ink);margin-bottom:.4em}
.lede{font-size:1.05rem;max-width:62ch}
.facts{display:flex;gap:12px;list-style:none;padding:0;margin:16px 0 0;flex-wrap:wrap}
.facts li{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 16px;min-width:96px}
.facts strong{display:block;font-size:1.4rem;color:var(--ink);line-height:1.2}.facts span{font-size:.85rem;color:var(--muted)}

.grid-2{display:grid;gap:16px;margin-top:20px}
@media (min-width:860px){.grid-2{grid-template-columns:minmax(0,5fr) minmax(0,6fr);align-items:start}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:16px}
label{display:block;font-weight:600;color:var(--ink);margin:12px 0 6px}
input{width:100%;font:inherit;padding:12px 14px;border:1px solid #8C8C8C;border-radius:10px;background:var(--surface);color:var(--ink);min-height:48px}
input:disabled{background:var(--bg);color:var(--muted)}
input[aria-invalid=true]{border-color:var(--bad)}
.hint{font-size:.88rem;color:var(--muted);margin:.5em 0 0}
.error{color:var(--bad);font-weight:600;min-height:1.2em;margin:.6em 0}
.error:empty{margin:0;min-height:0}
.notice{border:1px solid currentColor;font-weight:600;background:var(--warn-bg);color:var(--warn);border-radius:10px;padding:12px 14px;font-size:.92rem;margin-bottom:8px}
.muted{color:var(--muted)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:600;min-height:48px;padding:10px 18px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;text-decoration:none}
.btn:hover{border-color:var(--muted)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-primary{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.btn-primary:hover{filter:brightness(.95);border-color:var(--brand)}
.btn-danger{background:var(--bad-bg);border-color:var(--bad);color:var(--bad)}
.btn-block{width:100%;margin-top:16px}
.row{display:flex;gap:10px;flex-wrap:wrap}.row.end{justify-content:flex-end}

.table-wrap{overflow-x:auto}
.lb{width:100%;border-collapse:collapse;font-size:.95rem}
.lb th,.lb td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}
.lb th{font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:600}
.lb td:first-child{width:2.5em;font-weight:700;color:var(--ink)}
.lb td:nth-child(3),.lb td:nth-child(4){font-variant-numeric:tabular-nums;white-space:nowrap}
.lb tr.top td:first-child{color:var(--brand-ink)}

/* Exam */
.exam-head{padding:20px 0 8px}
.bar{height:6px;border-radius:6px;background:var(--line);overflow:hidden}
.bar span{display:block;height:100%;width:0;background:var(--brand);transition:width .2s}
@media (min-width:860px){#view-exam:not([hidden]){display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:16px;align-items:start}
  #view-exam .exam-head{grid-column:1/-1}#view-exam nav{position:sticky;top:72px}}
.qnum{font-size:.9rem;font-weight:600;color:var(--brand-ink);text-transform:uppercase;letter-spacing:.06em}
fieldset{border:0;padding:0;margin:0;min-width:0}
.stem{font-size:1.1rem;color:var(--ink);font-weight:600;white-space:pre-line;margin-bottom:16px;padding:0}
.options{display:grid;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;padding:14px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer;margin:0;font-weight:400;color:var(--text)}
.opt:hover{border-color:var(--muted)}
.opt input{width:20px;height:20px;min-height:0;margin:3px 0 0;accent-color:var(--brand);flex:none}
.opt .k{font-weight:700;color:var(--ink);text-transform:uppercase}
.opt:has(input:checked){border-color:var(--brand);background:color-mix(in srgb,var(--brand) 9%,var(--surface))}
.qnav{display:flex;justify-content:space-between;gap:10px;margin-top:20px}
.qnav .btn{flex:1;max-width:200px}
.nav-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;flex-wrap:wrap}
.legend{font-size:.8rem;color:var(--muted);margin:0;display:flex;align-items:center;gap:6px}
.dot{display:inline-block;width:12px;height:12px;border-radius:4px;border:1.5px solid var(--muted)}
.dot.answered{background:var(--ink);border-color:var(--ink)}
.navgrid{list-style:none;padding:0;margin:12px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:6px}
.navgrid button{width:100%;min-height:44px;border-radius:10px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;font-weight:600;font-size:.9rem;cursor:pointer;font-variant-numeric:tabular-nums}
.navgrid button.answered{background:var(--ink);border-color:var(--ink);color:var(--surface)}
.navgrid button[aria-current=true]{outline:3px solid var(--brand);outline-offset:1px}

/* Result */
.result-card{margin-top:24px}
.result-card h1{font-size:clamp(2.5rem,10vw,3.5rem);margin:0}
.review{list-style:none;padding:0;margin:0;counter-reset:q}
.review>li{background:var(--surface);border:1px solid var(--line);border-left:5px solid var(--bad);border-radius:var(--radius);padding:18px;margin-bottom:12px}
.review>li.correct{border-left-color:var(--ok)}
.review h3{white-space:pre-line}
.review .tag{display:inline-block;font-size:.78rem;font-weight:700;padding:2px 10px;border-radius:999px;background:var(--bad-bg);color:var(--bad);margin-bottom:8px}
.review li.correct .tag{background:var(--ok-bg);color:var(--ok)}
.review .ropts{list-style:none;padding:0;margin:10px 0}
.review .ropts li{padding:8px 12px;border-radius:10px;margin-bottom:6px;border:1px solid var(--line)}
.review .ropts li.is-answer{background:var(--ok-bg);border-color:var(--ok);color:var(--ink)}
.review .ropts li.is-wrong{background:var(--bad-bg);border-color:var(--bad);color:var(--ink)}
.review .ropts small{font-weight:700;margin-left:6px}
details{border-top:1px solid var(--line);padding-top:10px;margin-top:6px}
summary{cursor:pointer;font-weight:600;color:var(--ink);min-height:44px;display:flex;align-items:center}
.slides{padding-left:1.2em;margin:.4em 0 0}
.review.only-wrong>li.correct{display:none}

dialog{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--text);padding:24px;max-width:min(440px,calc(100vw - 32px))}
dialog::backdrop{background:rgba(0,0,0,.5)}
.foot{padding:20px 16px 32px;font-size:.85rem;color:var(--muted)}
@media (max-width:420px){.card{padding:16px}.facts li{min-width:0;flex:1}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}