:root{
  --ink:#12232b; --ink2:#46606b; --paper:#e9eeeb; --card:#fbfcfb; --line:#c9d3cf;
  --signal:#f2c230; --signal-d:#d9a90f; --blue:#1d4e6b; --ok:#1c7a4b; --bad:#b3261e; --warn:#b86e00;
  --display:#0c171c; --r:10px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 "Archivo","Segoe UI",system-ui,sans-serif}
h1,h2,h3{font-stretch:88%;font-weight:700;line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(1.7rem,4vw,2.5rem)} h2{font-size:1.4rem} h3{font-size:1.1rem}
p{margin:.3em 0 .9em}
a{color:var(--blue)}
.top{display:flex;align-items:center;gap:12px;padding:12px 20px;background:var(--ink);color:#fff}
.brand{font-stretch:80%;font-weight:800;font-size:1.15rem;letter-spacing:.02em;display:flex;align-items:center;gap:10px}
.brand i{display:inline-block;width:22px;height:26px;border:3px solid var(--signal);border-radius:3px;position:relative}
.brand i:after{content:"";position:absolute;left:50%;top:0;bottom:0;width:3px;background:var(--signal);transform:translateX(-50%)}
.top .sp{flex:1}.top .who{font-size:.9rem;opacity:.85}
.wrap{max-width:980px;margin:0 auto;padding:26px 18px 60px}
.narrow{max-width:520px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:18px}
.card.stripe{border-left:8px solid var(--signal)}
label{display:block;font-weight:600;font-size:.92rem;margin:12px 0 4px}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid #9fb0aa;border-radius:8px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,button:focus-visible,a:focus-visible{outline:3px solid var(--signal);outline-offset:1px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
@media(max-width:560px){.row{grid-template-columns:1fr}}
button,.btn{font:inherit;font-weight:700;border:0;border-radius:8px;padding:11px 20px;cursor:pointer;background:var(--signal);color:var(--ink);text-decoration:none;display:inline-block}
button:hover,.btn:hover{background:var(--signal-d)}
button.sec{background:#fff;border:1px solid #8aa0a8;color:var(--ink)} button.sec:hover{background:#eef3f1}
button.dark{background:var(--ink);color:#fff} button.dark:hover{background:#243d48}
button.danger{background:var(--bad);color:#fff}
button.sm{padding:6px 12px;font-size:.85rem}
button:disabled{opacity:.45;cursor:not-allowed}
.msg{padding:10px 12px;border-radius:8px;margin:12px 0;font-size:.95rem}
.msg.err{background:#fdeceb;color:var(--bad);border:1px solid #f2b8b5}
.msg.ok{background:#e6f4ec;color:var(--ok);border:1px solid #a9d8bc}
.msg.warn{background:#fff4dd;color:#7a4b00;border:1px solid #f0cf85}
.tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:2px solid var(--line)}
.tabs button{background:none;border-radius:8px 8px 0 0;color:var(--ink2);padding:10px 16px}
.tabs button.on{background:var(--ink);color:#fff}
.muted{color:var(--ink2);font-size:.92rem}
ul.rules{padding-left:1.2em}ul.rules li{margin:.45em 0}
.chip{display:inline-block;padding:2px 10px;border-radius:99px;font-size:.8rem;font-weight:700;background:#dfe7e3;color:var(--ink2)}
.chip.ok{background:#d6efe0;color:var(--ok)}.chip.bad{background:#f9dcda;color:var(--bad)}.chip.warn{background:#fdebc4;color:#7a4b00}.chip.on{background:var(--signal);color:var(--ink)}
.rec-dot{display:inline-block;width:11px;height:11px;border-radius:50%;background:#e5322a;margin-right:6px;animation:blink 1.4s infinite}
@keyframes blink{50%{opacity:.25}} @media(prefers-reduced-motion:reduce){.rec-dot{animation:none}}

/* device check */
.check{display:grid;grid-template-columns:260px 1fr;gap:20px;align-items:start}
@media(max-width:640px){.check{grid-template-columns:1fr}}
video.prev{width:100%;border-radius:8px;background:#000;transform:scaleX(-1)}
.meter{height:10px;background:#dbe3df;border-radius:6px;overflow:hidden}.meter b{display:block;height:100%;width:0;background:var(--ok);transition:width .08s}
.tick{font-weight:700}.tick.ok{color:var(--ok)}.tick.no{color:var(--bad)}

/* exam */
.exam{display:grid;grid-template-columns:1fr 400px;height:calc(100vh - 52px);height:calc(100dvh - 52px)}
@media(max-width:860px){.exam{grid-template-columns:1fr;grid-template-rows:55% 45%}}
.viewer{position:relative;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.vbar{display:flex;gap:6px;padding:8px 10px;background:#f1f4f2;border-bottom:1px solid var(--line);align-items:center}
.vbar span{font-size:.85rem;color:var(--ink2);margin-left:auto}
.vscroll{flex:1;overflow:auto;display:flex;min-height:0;cursor:grab;touch-action:pan-x pan-y pinch-zoom;background:#fff}
.vscroll.drag{cursor:grabbing}
.vscroll img{margin:auto;display:block;max-width:none;user-select:none;-webkit-user-drag:none}
.side{padding:16px;overflow:auto;background:var(--card);display:flex;flex-direction:column;gap:14px}
.floor{background:var(--display);border-radius:12px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;color:#fff}
.floor .q{font-size:.85rem;color:#9fb6bf}
.floor .q b{display:block;font-size:1.5rem;color:var(--signal);font-variant-numeric:tabular-nums}
.floor .t{font-size:2.6rem;font-weight:800;font-variant-numeric:tabular-nums;color:var(--signal);letter-spacing:.03em;font-stretch:90%}
.floor .t.low{color:#ff9a3c}.floor .t.crit{color:#ff5a4d}
.listen{display:flex;align-items:center;gap:10px;font-weight:600}
.wave{display:flex;gap:3px;align-items:center;height:22px}.wave i{width:4px;background:var(--ok);border-radius:2px;height:5px;transition:height .1s}
.say{font-size:.95rem;min-height:5.5em;max-height:12em;overflow:auto;background:#fff;border:1px dashed #9fb0aa;border-radius:8px;padding:10px;color:var(--ink2)}
.cam{width:110px;border-radius:8px;transform:scaleX(-1);background:#000;align-self:flex-start}

/* admin */
.wide{max-width:1280px}
table{width:100%;border-collapse:collapse;background:var(--card);font-size:.92rem}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#dfe7e3;font-stretch:90%;white-space:nowrap}
.tw{overflow:auto;border:1px solid var(--line);border-radius:var(--r)}
.bar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:0 0 14px}.bar input{max-width:300px}
.ans{border:1px solid var(--line);border-radius:var(--r);padding:16px;margin:14px 0;background:#fff}
.ans .grid{display:grid;grid-template-columns:150px 1fr;gap:16px}
@media(max-width:640px){.ans .grid{grid-template-columns:1fr}}
.ans img{width:100%;border:1px solid var(--line);border-radius:6px;cursor:zoom-in}
.pt{display:inline-block;margin:2px 4px 2px 0;padding:1px 9px;border-radius:99px;font-size:.82rem;background:#f9dcda;color:var(--bad)}.pt.hit{background:#d6efe0;color:var(--ok)}
.tr{background:#f4f7f5;border-left:4px solid var(--blue);padding:8px 12px;border-radius:4px;margin:6px 0;white-space:pre-wrap}
.model{background:#fff6d6;border-left:4px solid var(--signal);padding:8px 12px;border-radius:4px;margin:6px 0}
.big{font-size:2.2rem;font-weight:800;font-stretch:85%}
video.rv{width:100%;max-width:420px;border-radius:8px;background:#000}
.modal{position:fixed;inset:0;background:rgba(10,20,26,.85);z-index:50;overflow:auto;padding:16px}
.modal img{display:block;margin:0 auto;max-width:none;width:min(1400px,100%);background:#fff}
[hidden]{display:none!important}

.opts{display:flex;flex-direction:column;gap:8px}
.opts.lock{opacity:.45;pointer-events:none}
.opt{display:flex;gap:12px;align-items:flex-start;margin:0;padding:11px 12px;border:2px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;font-weight:500;font-size:.95rem;line-height:1.35}
.opt:hover{border-color:#8aa0a8}
.opt input{width:22px;height:22px;margin:1px 0 0;flex:none;accent-color:var(--ink)}
.opt:has(input:checked){border-color:var(--ink);background:#fff6d6}
.o{display:flex;gap:8px;align-items:flex-start;padding:6px 10px;margin:4px 0;border-radius:6px;border:1px solid var(--line);background:#fff}
.o.right{background:#e6f4ec;border-color:#a9d8bc}.o.wrongpick{background:#fdeceb;border-color:#f2b8b5}
.o b{flex:none;min-width:130px;font-size:.8rem}

.narrow2{max-width:760px}
.lh{color:var(--ink2);font-size:.9rem}
.lgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.lcard{display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left;background:var(--card);border:1px solid var(--line);border-left:6px solid var(--line);color:var(--ink);padding:12px 14px;border-radius:10px;font-weight:600}
.lcard:hover{background:#fff6d6}.lcard.done{border-left-color:var(--ok)}
.lcard .ln{font-size:.8rem;color:var(--ink2)}.lcard .lt{font-size:1rem}.lcard .ls{font-size:.82rem;color:var(--ink2);font-weight:400}
.dwrap{max-height:420px;overflow:auto;border:1px solid var(--line);border-radius:8px;background:#fff}.dwrap img{display:block;width:100%;min-width:560px}
.q .qh{font-weight:800;color:var(--blue);margin-bottom:4px}.q .qe{font-size:1.1rem;font-weight:700;display:flex;gap:10px;align-items:flex-start;justify-content:space-between;flex-wrap:wrap}
.sin{overflow-x:auto;margin:6px 0 10px;border-radius:6px}.sin img{display:block;width:100%;min-width:600px;height:auto}
.opt.good,.opt.good:has(input:checked){border-color:var(--ok)!important;background:#e6f4ec!important}.opt.bad,.opt.bad:has(input:checked){border-color:var(--bad)!important;background:#fdeceb!important}
.tag{display:inline-block;margin-left:6px;padding:0 8px;border-radius:99px;font-size:.75rem}.tag.ok{background:var(--ok);color:#fff}.tag.no{background:var(--bad);color:#fff}
.yellow{background:#fff0b3;border-radius:8px;padding:12px 14px;margin:10px 0 4px}
.remember{background:#eef4f6;border-left:8px solid var(--blue)}.remember p{margin:.3em 0 0}
.navrow{display:flex;justify-content:space-between;gap:10px}
.wrap .opts{margin-top:6px}

.qtext{background:#fff6d6;border-left:6px solid var(--signal);border-radius:8px;padding:11px 14px;font-weight:700;font-size:1.02rem;line-height:1.4}