:root{
  --ink:#1b1a17; --muted:#6b665d; --line:#e7e1d6; --bg:#faf7f1; --card:#fff;
  --brand:#0f6b5c; --brand-2:#e9f3f0; --warn:#b4690e; --warn-2:#fbf1e2; --bad:#b3261e; --bad-2:#fbe9e7;
  --radius:14px; --font: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
*{box-sizing:border-box} body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.5}
a{color:var(--brand)} h1,h2,h3{line-height:1.2;margin:0 0 .5rem} h1{font-size:1.75rem} h2{font-size:1.2rem}
.top{display:flex;align-items:center;gap:1.25rem;padding:1rem 1.5rem;border-bottom:1px solid var(--line);background:var(--card);flex-wrap:wrap}
.logo{font-weight:800;letter-spacing:-.02em;font-size:1.2rem;color:var(--ink);text-decoration:none}
.logo span{color:var(--brand)}
.nav a{margin-right:1rem;text-decoration:none;color:var(--muted);font-weight:500}
.nav a:hover{color:var(--ink)}
.pill{display:inline-block;padding:.15rem .6rem;border-radius:999px;background:var(--brand-2);color:var(--brand);font-size:.8rem;font-weight:600}
.wrap{max-width:1040px;margin:0 auto;padding:1.5rem}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem}
.big{font-size:2rem;font-weight:700;letter-spacing:-.02em}
.muted{color:var(--muted)} .small{font-size:.875rem}
.bar{height:10px;background:#f0ece4;border-radius:99px;overflow:hidden;margin:.5rem 0}
.bar i{display:block;height:100%;background:var(--brand)}
.bar.watch i{background:var(--warn)} .bar.stopped i{background:var(--bad)}
.tag{font-size:.75rem;font-weight:700;padding:.1rem .5rem;border-radius:6px}
.tag.ok{background:var(--brand-2);color:var(--brand)} .tag.watch{background:var(--warn-2);color:var(--warn)} .tag.stopped{background:var(--bad-2);color:var(--bad)}
.tips li{margin:.35rem 0}
.flash{background:var(--brand-2);border:1px solid #cfe5df;padding:.75rem 1rem;border-radius:10px;margin-bottom:1rem}
form.inline{display:flex;gap:.5rem;flex-wrap:wrap;align-items:end}
label{display:block;font-size:.85rem;font-weight:600;margin:.6rem 0 .25rem}
input,select,textarea{font:inherit;padding:.55rem .7rem;border:1px solid var(--line);border-radius:10px;background:#fff;width:100%}
form.inline input,form.inline select{width:auto}
button,.btn{font:inherit;font-weight:600;border:0;border-radius:10px;padding:.6rem 1rem;background:var(--brand);color:#fff;cursor:pointer;text-decoration:none;display:inline-block}
button.ghost{background:transparent;color:var(--brand);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse} td,th{padding:.6rem .4rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:.8rem;color:var(--muted);font-weight:600}
code,pre{font-family:ui-monospace,Menlo,monospace;font-size:.85rem}
pre{background:#f4f1ea;padding:.8rem;border-radius:10px;overflow:auto;white-space:pre-wrap}
.key{background:#1b1a17;color:#fff;padding:.8rem 1rem;border-radius:10px;word-break:break-all}
.quiz fieldset{border:1px solid var(--line);border-radius:12px;margin:0 0 .75rem;padding:.75rem 1rem}
.quiz legend{font-weight:600;padding:0 .25rem}
.quiz label{font-weight:400;display:flex;gap:.5rem;align-items:center;margin:.25rem 0}
.quiz input[type=radio]{width:auto}
.level.current{outline:2px solid var(--brand)}
.hero{padding:3rem 0 1.5rem} .hero h1{font-size:2.4rem;max-width:22ch}
@media (max-width:600px){.hero h1{font-size:1.8rem}.wrap{padding:1rem}}