:root{
  --bg:#f7f6f2;--surface:#ffffff;--ink:#1c2321;--muted:#5b6662;--line:#e2e0d8;
  --brand:#0f5c4d;--brand-ink:#ffffff;--accent:#d9822b;--ok:#1f7a3f;--bad:#b3261e;
  --soft:#e8f1ee;--radius:14px;--max:1080px;
  --font:"Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#111614;--surface:#1a211e;--ink:#e9eeec;--muted:#a2aeaa;--line:#2c3532;
  --brand:#4fb39a;--brand-ink:#0b1210;--accent:#f0a456;--ok:#5ccf86;--bad:#ff8a80;--soft:#1f2b27;
}}
:root[data-theme="dark"]{
  --bg:#111614;--surface:#1a211e;--ink:#e9eeec;--muted:#a2aeaa;--line:#2c3532;
  --brand:#4fb39a;--brand-ink:#0b1210;--accent:#f0a456;--ok:#5ccf86;--bad:#ff8a80;--soft:#1f2b27;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.6}
a{color:var(--brand)}
img{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
header.top{border-bottom:1px solid var(--line);background:var(--surface)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px;flex-wrap:wrap}
.logo{font-weight:800;text-decoration:none;color:var(--ink);font-size:1.1rem}
.logo span{color:var(--brand)}
nav a{margin-left:16px;text-decoration:none;color:var(--muted);font-weight:600;font-size:.95rem}
nav a:hover{color:var(--ink)}
.hero{padding:56px 0 40px}
.eyebrow{display:inline-block;background:var(--soft);color:var(--brand);font-weight:700;font-size:.85rem;padding:4px 10px;border-radius:99px}
h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.15;margin:14px 0 12px;letter-spacing:-.02em}
h2{font-size:clamp(1.4rem,3.4vw,2rem);line-height:1.25;margin:0 0 12px;letter-spacing:-.01em}
h3{font-size:1.15rem;margin:0 0 6px}
.lead{font-size:1.15rem;color:var(--muted);max-width:640px}
.btn{display:inline-block;background:var(--brand);color:var(--brand-ink);font-weight:700;text-decoration:none;border:0;border-radius:10px;padding:13px 20px;font-size:1rem;cursor:pointer;font-family:inherit;min-height:48px}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--brand);border:2px solid var(--brand)}
.btn[disabled]{opacity:.6;cursor:wait}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
section{padding:44px 0}
section.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
section.alt .card{background:var(--bg)}
.card p{margin:0;color:var(--muted)}
.facts{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-top:20px}
.fact b{display:block;font-size:1.6rem;color:var(--brand);line-height:1.2}
.fact small{color:var(--muted)}
/* quiz */
.quiz{max-width:720px}
.q{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.q-meta{color:var(--muted);font-size:.9rem;margin-bottom:6px;display:flex;justify-content:space-between}
.q-text{font-weight:600;margin:0 0 14px}
.opt{display:block;width:100%;text-align:left;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:8px 0;font:inherit;cursor:pointer;min-height:48px}
.opt:hover:not([disabled]){border-color:var(--brand)}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 12%,transparent)}
.opt.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 12%,transparent)}
.expl{margin-top:12px;padding:12px 14px;border-left:4px solid var(--brand);background:var(--soft);border-radius:6px;font-size:.95rem}
.score{font-size:2.4rem;font-weight:800;color:var(--brand)}
.progress{height:6px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:14px}
.progress i{display:block;height:100%;background:var(--brand);transition:width .3s}
/* forms */
form.f{display:grid;gap:12px;max-width:560px}
label{font-weight:600;font-size:.95rem}
input,select,textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font:inherit;min-height:48px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:1px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.note{font-size:.88rem;color:var(--muted)}
.msg{padding:12px 14px;border-radius:10px;font-weight:600}
.msg.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}
.msg.err{background:color-mix(in srgb,var(--bad) 14%,transparent);color:var(--bad)}
.reflink{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.reflink input{flex:1;min-width:0}
/* table */
.tbl{width:100%;border-collapse:collapse;font-size:.95rem}
.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;vertical-align:top}
.tbl-wrap{overflow-x:auto}
/* faq */
details{border-bottom:1px solid var(--line);padding:14px 0}
summary{font-weight:700;cursor:pointer}
details p{color:var(--muted);margin:8px 0 0}
/* article */
article.post{max-width:720px;padding:36px 0 20px}
article.post h1{font-size:clamp(1.7rem,4.5vw,2.4rem)}
article.post h2{font-size:1.4rem;margin-top:32px}
article.post .meta{color:var(--muted);font-size:.9rem}
article.post li{margin:4px 0}
.callout{background:var(--soft);border-radius:var(--radius);padding:18px 20px;margin:28px 0}
.callout p{margin:6px 0 0}
.crumb{font-size:.9rem;color:var(--muted);padding-top:18px}
.crumb a{color:var(--muted)}
footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:.9rem;background:var(--surface)}
footer a{color:var(--muted)}
@media (max-width:560px){nav a{margin-left:12px;font-size:.9rem}.hero{padding:36px 0 28px}}
a.card{text-decoration:none;color:inherit;display:block}a.card:hover{border-color:var(--brand)}a.card h3{color:var(--brand)}