:root{
    --bg:#e7eaed; --panel:#fff; --ink:#1a2026; --muted:#5c6773;
    --steel:#2f4858; --steel-2:#3f6b82; --line:#d3d9de;
    --ok:#0f7a37; --ok-bg:#e2f3e8; --ok-br:#8fcfa6;
    --no-ink:#59636e; --no-bg:#eceff1; --no-br:#cdd4da;
    --key:#ffd23f; --flaw:#b3261e; --warn:#b3261e;
    --shadow:0 1px 2px rgba(20,30,40,.06),0 8px 24px rgba(20,30,40,.06);
  }
  *{box-sizing:border-box}
  body{margin:0;background:var(--bg);color:var(--ink);font-family:"Inter",system-ui,sans-serif;line-height:1.5;
    background-image:radial-gradient(circle at 1px 1px,rgba(47,72,88,.07) 1px,transparent 0);background-size:22px 22px;}
  .wrap{max-width:1140px;margin:0 auto;padding:20px 16px 80px}
  header{margin-bottom:12px}
  .eyebrow{font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--steel-2);font-weight:700}
  h1{font-family:"Chakra Petch",sans-serif;font-weight:700;font-size:clamp(21px,4vw,32px);margin:4px 0 10px;text-transform:uppercase}
  /* Tabs */
  .tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:2px solid var(--line);padding-bottom:0;margin-bottom:16px}
  .tab{font-family:"Chakra Petch",sans-serif;font-weight:600;font-size:14px;letter-spacing:.02em;text-transform:uppercase;
    border:none;background:transparent;color:var(--muted);padding:10px 14px;cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px;
    display:flex;align-items:center;gap:7px}
  .tab:hover{color:var(--steel)}
  .tab.on{color:var(--steel);border-bottom-color:var(--steel)}
  .badge{font-family:"JetBrains Mono",monospace;font-size:11px;font-weight:700;background:var(--flaw);color:#fff;border-radius:99px;padding:1px 7px;min-width:20px;text-align:center}
  .badge.zero{background:#c3ccd3}
  .view{display:none}.view.on{display:block}
  /* chips + bar */
  .chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
  .chip{font-family:"Chakra Petch",sans-serif;font-size:12.5px;font-weight:600;border:1.5px solid var(--line);background:#fff;color:var(--muted);
    border-radius:99px;padding:6px 13px;cursor:pointer;transition:all .12s}
  .chip:hover{border-color:var(--steel-2);color:var(--steel)}
  .chip.on{background:var(--steel);border-color:var(--steel);color:#fff}
  .barwrap{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:14px}
  .bar{flex:1;min-width:160px;height:8px;background:#d5dbe0;border-radius:99px;overflow:hidden}
  .bar>span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--steel),var(--steel-2));transition:width .35s ease}
  .stats{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--muted);white-space:nowrap}
  .stats b{color:var(--ink)} .stats .g{color:var(--ok)} .stats .r{color:var(--flaw)}
  /* layout + card */
  .grid{display:grid;grid-template-columns:1fr 320px;gap:18px;align-items:start}
  @media(max-width:840px){.grid{grid-template-columns:1fr}}
  .card{background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
  .qhead{display:flex;align-items:center;gap:10px;padding:16px 20px 6px;flex-wrap:wrap}
  .qnum{font-family:"Chakra Petch",sans-serif;font-weight:700;font-size:13px;color:#fff;background:var(--steel);padding:4px 9px;border-radius:6px;white-space:nowrap}
  .qsec{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--muted)}
  .qbody{padding:6px 20px 4px;font-size:16.5px;font-weight:500}
  .qbody .key{border-radius:3px;padding:0 1px;transition:background .25s}
  .answered .qbody .key{background:var(--key);box-shadow:0 0 0 2px var(--key)}
  .qimgs{padding:8px 20px 2px;display:flex;flex-direction:column;gap:8px}
  .qimgs img{max-width:100%;border:1px solid var(--line);border-radius:8px;background:#fff}
  .opts{padding:10px 16px 6px;display:flex;flex-direction:column;gap:9px}
  .opt{display:flex;gap:12px;align-items:flex-start;border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;cursor:pointer;background:#fff;font-size:14.5px;
    transition:border-color .15s,background .15s,transform .05s}
  .opt:hover:not(.locked){border-color:var(--steel-2);background:#f7fafc}
  .opt:active:not(.locked){transform:translateY(1px)}
  .opt.locked{cursor:default}
  .tagl{font-family:"JetBrains Mono",monospace;font-weight:700;font-size:13px;width:24px;height:24px;flex:none;border-radius:6px;display:grid;place-items:center;background:#eef2f5;color:var(--steel);border:1px solid var(--line)}
  .otext .flaw{font-weight:400;transition:all .2s}
  .answered .opt.no .flaw{font-weight:700;color:var(--flaw);text-decoration:underline;text-decoration-color:rgba(179,38,30,.45);text-underline-offset:3px}
  .answered .opt.ok{background:var(--ok-bg);border-color:var(--ok-br)}
  .answered .opt.ok .tagl{background:var(--ok);color:#fff;border-color:var(--ok)}
  .answered .opt.no{background:var(--no-bg);border-color:var(--no-br);color:var(--no-ink)}
  .answered .opt.no .tagl{background:#dde3e8;color:var(--no-ink)}
  .answered .opt.picked{box-shadow:0 0 0 2px rgba(47,72,88,.25)}
  .answered .opt.picked.no{box-shadow:0 0 0 2px rgba(179,38,30,.35)}
  .opt.exam-sel{border-color:var(--steel);background:#eef4f8;box-shadow:0 0 0 2px rgba(47,72,88,.2)}
  .opt.exam-sel .tagl{background:var(--steel);color:#fff}
  .mark{margin-left:auto;font-family:"JetBrains Mono",monospace;font-weight:700;font-size:12px;align-self:center;opacity:0;white-space:nowrap;transition:opacity .2s}
  .answered .opt.ok .mark{opacity:1;color:var(--ok)}
  .answered .opt.no .mark{opacity:1;color:var(--no-ink)}
  .why{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:13px;color:var(--no-ink)}
  .answered .opt.no.haswhy .why{max-height:220px;margin-top:4px}
  .why::before{content:"proč ne — ";font-family:"JetBrains Mono",monospace;font-size:10.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--flaw);font-weight:700}
  .nav{display:flex;gap:10px;padding:12px 16px 16px;align-items:center;flex-wrap:wrap}
  .btn{font-family:"Chakra Petch",sans-serif;font-weight:600;font-size:14px;border:1.5px solid var(--steel);background:#fff;color:var(--steel);padding:9px 16px;border-radius:8px;cursor:pointer;transition:all .12s;text-transform:uppercase}
  .btn:hover{background:var(--steel);color:#fff}
  .btn:disabled{opacity:.35;cursor:not-allowed;background:#fff;color:var(--steel)}
  .btn.primary{background:var(--steel);color:#fff}
  .btn.primary:hover{background:var(--steel-2);border-color:var(--steel-2)}
  .btn.danger{border-color:var(--flaw);color:var(--flaw)}
  .btn.danger:hover{background:var(--flaw);color:#fff}
  .spacer{flex:1}
  .jump{font-family:"JetBrains Mono",monospace;font-size:13px;color:var(--muted)}
  .jump input{width:64px;font-family:"JetBrains Mono",monospace;font-size:13px;text-align:center;border:1.5px solid var(--line);border-radius:6px;padding:5px}
  .side{position:sticky;top:16px}
  .sum{background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
  .sum .top{background:var(--steel);color:#fff;padding:12px 16px;font-family:"Chakra Petch",sans-serif;font-weight:700;font-size:13px;text-transform:uppercase;display:flex;align-items:center;gap:8px}
  .sum .top::before{content:"";width:9px;height:9px;border-radius:2px;background:var(--key)}
  .sum .body{padding:15px 16px;font-size:14px;min-height:80px}
  .sum .placeholder{color:var(--muted);font-style:italic}
  .sum .ans{font-family:"JetBrains Mono",monospace;font-weight:700;font-size:12px;color:var(--ok);display:inline-block;margin-bottom:8px;background:var(--ok-bg);border:1px solid var(--ok-br);padding:2px 8px;border-radius:5px}
  .sum .noann{color:var(--muted);font-size:12.5px;margin-top:10px;font-style:italic}
  .legend{margin-top:14px;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);font-size:12.5px;color:var(--muted)}
  .legend h4{margin:0 0 8px;font-family:"Chakra Petch",sans-serif;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--steel-2)}
  .legend .row{display:flex;align-items:center;gap:8px;margin:5px 0}
  .sw{width:16px;height:16px;border-radius:4px;flex:none;border:1px solid var(--line)}
  .sw.ok{background:var(--ok-bg);border-color:var(--ok-br)} .sw.no{background:var(--no-bg);border-color:var(--no-br)} .sw.key{background:var(--key)}
  .note{margin-top:14px;font-size:12px;color:var(--muted);text-align:center;font-family:"JetBrains Mono",monospace}
  kbd{font-family:"JetBrains Mono",monospace;background:#dde3e8;border-radius:4px;padding:1px 5px;font-size:11px}
  .empty{padding:44px 24px;text-align:center;color:var(--muted)}
  .empty b{color:var(--ink)}
  /* exam */
  .exam-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:12px}
  .timer{font-family:"JetBrains Mono",monospace;font-weight:700;font-size:20px;color:var(--steel);background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:8px 14px}
  .timer.low{color:var(--flaw);border-color:var(--flaw)}
  .qgrid{display:flex;flex-wrap:wrap;gap:5px;margin:6px 0 12px}
  .qdot{width:32px;height:30px;border:1.5px solid var(--line);border-radius:7px;background:#fff;font-family:"JetBrains Mono",monospace;font-size:11.5px;font-weight:700;color:var(--muted);cursor:pointer;display:grid;place-items:center}
  .qdot.filled{background:var(--steel);border-color:var(--steel);color:#fff}
  .qdot.cur{box-shadow:0 0 0 2.5px var(--key)}
  .qdot.rok{background:var(--ok-bg);border-color:var(--ok-br);color:var(--ok)}
  .qdot.rno{background:#fbeaea;border-color:#e5b6b3;color:var(--flaw)}
  .result{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:22px;margin-bottom:16px}
  .result h2{font-family:"Chakra Petch",sans-serif;margin:0 0 6px;text-transform:uppercase;font-size:20px}
  .score{font-family:"JetBrains Mono",monospace;font-size:40px;font-weight:700}
  .verdict{display:inline-block;font-family:"Chakra Petch",sans-serif;font-weight:700;padding:5px 14px;border-radius:8px;margin:6px 8px 6px 0;font-size:14px}
  .verdict.pass{background:var(--ok-bg);color:var(--ok);border:1.5px solid var(--ok-br)}
  .verdict.fail{background:#fbeaea;color:var(--flaw);border:1.5px solid #e5b6b3}
  .mailrow{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;align-items:center}
  .mailrow input{flex:1;min-width:220px;border:1.5px solid var(--line);border-radius:8px;padding:10px 12px;font-family:"Inter",sans-serif;font-size:14px}
  .mailhint{font-size:12px;color:var(--muted);margin-top:6px}
  /* tahak */
  .tk{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px}
  .tcard{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:18px}
  .tcard h3{font-family:"Chakra Petch",sans-serif;text-transform:uppercase;font-size:15px;margin:0 0 4px;color:var(--steel)}
  .tcard .src{font-family:"JetBrains Mono",monospace;font-size:10.5px;color:var(--muted);margin-bottom:12px}
  .lad{display:flex;flex-direction:column;gap:6px}
  .rung{display:grid;grid-template-columns:52px 1fr;gap:10px;border-radius:9px;padding:9px 12px;font-size:13px;align-items:center}
  .rung b.cat{font-family:"Chakra Petch",sans-serif;font-size:16px}
  .rung small{display:block;color:inherit;opacity:.85}
  .r-ban{background:#fbe3e1;border:1.5px solid #e5b6b3;color:#7a1a14}
  .r-pov{background:#fdf1dc;border:1.5px solid #ecd3a0;color:#7a5410}
  .r-reg{background:#eef4f8;border:1.5px solid #bcd0dc;color:#24455a}
  .r-vol{background:var(--ok-bg);border:1.5px solid var(--ok-br);color:#0c5e2b}
  .tk table{width:100%;border-collapse:collapse;font-size:13px}
  .tk th{font-family:"Chakra Petch",sans-serif;text-align:left;font-size:11.5px;text-transform:uppercase;color:var(--muted);padding:6px 8px;border-bottom:2px solid var(--line)}
  .tk td{padding:7px 8px;border-bottom:1px solid var(--line);vertical-align:top}
  .tk td b.num{font-family:"JetBrains Mono",monospace;color:var(--steel);white-space:nowrap}
  .steps{counter-reset:s;display:flex;flex-direction:column;gap:8px}
  .step{display:flex;gap:10px;font-size:13.5px;align-items:flex-start}
  .step::before{counter-increment:s;content:counter(s);font-family:"Chakra Petch",sans-serif;font-weight:700;width:24px;height:24px;flex:none;border-radius:50%;background:var(--steel);color:#fff;display:grid;place-items:center;font-size:12px}
  .bigfact{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
  .bf{flex:1;min-width:110px;background:#eef4f8;border:1.5px solid #bcd0dc;border-radius:10px;padding:10px;text-align:center}
  .bf .v{font-family:"JetBrains Mono",monospace;font-weight:700;font-size:20px;color:var(--steel)}
  .bf .l{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
  .pill{display:inline-block;font-family:"JetBrains Mono",monospace;font-size:11px;font-weight:700;border-radius:6px;padding:1px 7px;margin:1px 2px}
  .p-ban{background:#fbe3e1;color:#7a1a14}.p-ok{background:var(--ok-bg);color:#0c5e2b}.p-b{background:#eef4f8;color:#24455a}
  /* statistika */
  .stgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
  .strow{margin:10px 0}
  .strow .lbl{display:flex;justify-content:space-between;font-size:13px;margin-bottom:4px}
  .strow .lbl b{font-family:"JetBrains Mono",monospace}
  .sbar{height:10px;background:#e3e8ec;border-radius:99px;overflow:hidden;display:flex}
  .sbar .g{background:var(--ok);height:100%}
  .sbar .r{background:#d9827c;height:100%}
  .misslist{font-size:13px}
  .misslist a{color:var(--steel);cursor:pointer;text-decoration:underline;text-underline-offset:2px}
  .misslist li{margin:5px 0}
  .warnbox{background:#fdf1dc;border:1.5px solid #ecd3a0;border-radius:10px;padding:10px 14px;font-size:12.5px;color:#7a5410;margin-bottom:14px}