:root{
  --bg:#f6f4ee;--card:#fff;--ink:#1d2421;--ink2:#5b6460;--line:#e3e0d6;
  --pri:#0f3d3e;--pri2:#1f6f6b;--acc:#f2b33d;--ok:#2e8b57;--okbg:#e7f4ec;--bad:#c0392b;--badbg:#fbeae7;--warn:#b7791f;--warnbg:#fdf3e1;
  --r:14px;--sh:0 1px 2px rgba(0,0,0,.04),0 4px 18px rgba(15,61,62,.06)
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--pri2)}
.top{position:sticky;top:0;z-index:20;background:var(--pri);color:#fff;box-shadow:0 2px 10px rgba(0,0,0,.12)}
.top-in{max-width:1100px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;white-space:nowrap}
.brand img{width:34px;height:34px;border-radius:9px}
.brand small{display:block;font-weight:400;font-size:12px;opacity:.75}
#nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;margin-left:auto}
#nav::-webkit-scrollbar{display:none}
#nav a{color:#d9ebe9;text-decoration:none;padding:7px 12px;border-radius:999px;font-size:14.5px;font-weight:600;white-space:nowrap}
#nav a.on{background:var(--acc);color:#1d2421}
main{max-width:1100px;margin:0 auto;padding:24px 18px 120px}
.loading{color:var(--ink2)}
h1{font-size:30px;line-height:1.2;margin:4px 0 14px;letter-spacing:-.01em}
h2{font-size:22px;margin:26px 0 10px}
h3{font-size:18px;margin:22px 0 8px}
h4{font-size:16px;margin:18px 0 6px}
.muted{color:var(--ink2)}
.small{font-size:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:18px 20px;margin:14px 0}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.hero{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0}
.hero h1,.hero h2{color:#fff;margin-top:0}
.hero .muted{color:#cfe5e2}
.big{font-size:44px;font-weight:800;line-height:1}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:999px;padding:10px 18px;font:600 15px/1.2 inherit;cursor:pointer;text-decoration:none;background:var(--pri);color:#fff}
.btn.acc{background:var(--acc);color:#1d2421}
.btn.ghost{background:transparent;color:var(--pri);border:1.5px solid var(--pri)}
.hero .btn.ghost{color:#fff;border-color:#fff}
.btn.sm{padding:6px 12px;font-size:14px}
.btn:disabled{opacity:.45;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12.5px;font-weight:700;background:#eef3f1;color:var(--pri)}
.pill.B{background:#e6f0ef}.pill.R{background:var(--warnbg);color:var(--warn)}.pill.S{background:#f6e3e3;color:var(--bad)}
.pill.ok{background:var(--okbg);color:var(--ok)}.pill.bad{background:var(--badbg);color:var(--bad)}.pill.mid{background:var(--warnbg);color:var(--warn)}
.bar{height:10px;background:#e8e5dc;border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--acc);border-radius:99px}
/* plán */
.plan{display:grid;gap:8px}
.plan a{display:grid;grid-template-columns:44px 92px 54px 1fr auto;gap:10px;align-items:center;padding:10px 14px;background:var(--card);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink)}
.plan a.today{outline:3px solid var(--acc)}
.plan a.done{background:#f0f7f3}
.plan .n{font-weight:800;color:var(--pri2)}
@media(max-width:640px){.plan a{grid-template-columns:34px 1fr auto;}.plan a .d,.plan a .t2{display:none}}
/* deň */
.steps{position:sticky;top:58px;z-index:10;background:var(--bg);padding:8px 0;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--line)}
.steps::-webkit-scrollbar{display:none}
.steps a{white-space:nowrap;font-size:13.5px;padding:5px 11px;border-radius:999px;background:var(--card);border:1px solid var(--line);color:var(--ink);text-decoration:none}
.steps a.q{border-color:var(--acc)}
.sec{scroll-margin-top:120px}
.prose{overflow-wrap:break-word}
.prose table{border-collapse:collapse;width:100%;display:block;overflow-x:auto;margin:12px 0;font-size:14.5px}
.prose th,.prose td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
.prose th{background:#eef3f1}
.prose pre{background:#13201f;color:#e9f1ef;padding:14px;border-radius:12px;overflow-x:auto;font-size:13px;line-height:1.45}
.prose code{background:#efece4;padding:1px 5px;border-radius:5px;font-size:.92em}
.prose pre code{background:none;padding:0}
.prose blockquote{margin:12px 0;padding:8px 14px;border-left:4px solid var(--acc);background:#fffaf0;border-radius:0 10px 10px 0}
.prose details{background:#f7f6f1;border:1px solid var(--line);border-radius:10px;padding:8px 12px;margin:10px 0}
.prose summary{cursor:pointer;font-weight:600;color:var(--pri2)}
.prose pre.mermaid{background:#fff;color:#333;text-align:center}
/* kvíz */
.qi{border-top:1px solid var(--line);padding:16px 0}
.qi:first-of-type{border-top:0}
.qh{display:flex;gap:10px;align-items:baseline}
.qn{font-weight:800;color:var(--pri2);min-width:28px}
.qt{font-weight:600}
.opts{display:grid;gap:8px;margin:10px 0 0 38px}
.opt{display:flex;gap:10px;text-align:left;width:100%;padding:10px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;font:inherit;color:inherit;cursor:pointer}
.opt b{color:var(--pri2)}
.opt:hover{border-color:var(--pri2)}
.opt.sel{border-color:var(--pri);background:#eef6f5}
.opt.right{border-color:var(--ok);background:var(--okbg)}
.opt.wrong{border-color:var(--bad);background:var(--badbg)}
.opt:disabled{cursor:default}
.conf{margin:8px 0 0 38px;display:flex;gap:6px;align-items:center;font-size:14px;color:var(--ink2);flex-wrap:wrap}
.conf button{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:4px 12px;font:600 14px inherit;cursor:pointer}
.conf button.on{background:var(--pri);color:#fff;border-color:var(--pri)}
.exp{margin:10px 0 0 38px;padding:10px 14px;border-radius:12px;background:#f7f6f1;font-size:14.5px}
.exp.ok{background:var(--okbg)}.exp.bad{background:var(--badbg)}
.cover{margin:10px 0 0 38px}
.score{font-size:26px;font-weight:800}
.qbar{position:sticky;top:110px;z-index:5;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:8px 12px;margin:8px 0;display:flex;gap:12px;align-items:center}
.qbar .bar{flex:1}
/* kartičky */
.flash{min-height:220px;display:flex;flex-direction:column;justify-content:center;text-align:center;font-size:19px;cursor:pointer}
.flash .back{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);color:var(--pri);font-weight:600}
/* časovač */
.timer{position:fixed;right:16px;bottom:16px;z-index:30;background:var(--pri);color:#fff;border-radius:16px;padding:10px 14px;box-shadow:0 8px 24px rgba(0,0,0,.25);display:flex;gap:10px;align-items:center;font-weight:700}
.timer .t{font-size:22px;font-variant-numeric:tabular-nums}
.timer button{background:rgba(255,255,255,.15);color:#fff;border:0;border-radius:999px;padding:5px 10px;font:600 13px inherit;cursor:pointer}
.timer.over{background:var(--bad)}
.hidden{display:none}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 14px}
.tabs a{padding:6px 14px;border-radius:999px;background:var(--card);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:600;font-size:14.5px}
.tabs a.on{background:var(--pri);color:#fff;border-color:var(--pri)}
label.f{display:block;font-weight:600;margin:12px 0 6px}
select,input[type=number]{font:inherit;padding:8px 10px;border-radius:10px;border:1.5px solid var(--line);background:#fff;max-width:100%}
table.st{border-collapse:collapse;width:100%;font-size:14.5px}
table.st td,table.st th{padding:6px 8px;border-bottom:1px solid var(--line);text-align:left}
.rub{display:grid;grid-template-columns:1fr auto;gap:8px 14px;align-items:center}
.rub .seg{display:flex;gap:4px}
.rub .seg button{width:36px;border:1.5px solid var(--line);background:#fff;border-radius:8px;padding:4px 0;font:600 14px inherit;cursor:pointer}
.rub .seg button.on{background:var(--pri);color:#fff;border-color:var(--pri)}
@media(max-width:720px){
  .top-in{flex-wrap:wrap;gap:8px;padding:8px 12px}.brand small{display:none}#nav{margin-left:0;width:100%}
  main{padding:16px 12px 120px}h1{font-size:24px}.opts,.conf,.exp,.cover{margin-left:0}.steps{top:96px}.qbar{top:140px}.sec{scroll-margin-top:150px}
}