:root{--bg:#f4f9f8;--surface:#ffffff;--ink:#16292b;--muted:#5a6e70;--line:#dbe7e5;--accent:#0b6b61;--accent2:#12958a;--soft:#e9f5f3;--warn:#fff6e0;--warnline:#e6c875;--shadow:0 1px 2px rgba(16,40,40,.06),0 10px 28px rgba(16,40,40,.07);--hero1:#0a5c54;--hero2:#14a193}
@media (prefers-color-scheme:dark){:root{--bg:#0e1617;--surface:#142022;--ink:#e8f0ef;--muted:#9fb3b1;--line:#243537;--accent:#5fd0c2;--accent2:#7fe0d3;--soft:#172a2c;--warn:#2b2615;--warnline:#6b5a22;--shadow:none;--hero1:#0b3f3b;--hero2:#116b63}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--accent)}
header{position:sticky;top:0;z-index:10;background:var(--surface);border-bottom:1px solid var(--line);padding:12px 20px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.bar{max-width:980px;margin:0 auto;display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;text-decoration:none;color:var(--ink);letter-spacing:-.01em}
.brand::before{content:"+";display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--hero1),var(--hero2));color:#fff;font-size:22px;font-weight:700;line-height:1}
header nav a{display:inline-block;padding:7px 14px;margin:0 2px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;color:var(--muted)}
header nav a:hover{background:var(--soft);color:var(--accent)}
main{max-width:800px;margin:0 auto;padding:32px 20px}
main.wide,.home{max-width:980px}
main>article{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:36px 40px;box-shadow:var(--shadow)}
h1{font-size:36px;line-height:1.2;margin:6px 0 14px;letter-spacing:-.02em}
h2{font-size:24px;line-height:1.3;margin:38px 0 10px;letter-spacing:-.01em}
h3{font-size:18px;line-height:1.4;margin:24px 0 6px}
p{margin:0 0 14px}
.meta{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--accent);background:var(--soft);padding:4px 12px;border-radius:999px;margin:0 0 10px}
.answer{background:var(--soft);border-left:5px solid var(--accent2);padding:18px 20px;margin:22px 0;border-radius:12px}
.answer p{margin:0 0 8px}
.answer p:last-child{margin:0}
.warn{background:var(--warn);border:1px solid var(--warnline);padding:14px 18px;border-radius:12px;font-size:16px;margin:22px 0}
.scroll{overflow-x:auto;margin:16px 0;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:15px;line-height:1.5}
th,td{border-bottom:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
th{background:var(--soft);font-weight:700}
tr:last-child td{border-bottom:0}
caption{caption-side:bottom;text-align:left;font-size:13px;color:var(--muted);padding:8px 14px}
ul,ol{padding-left:22px;margin:0 0 14px}
li{margin:6px 0}
details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:10px 0;background:var(--surface)}
summary{cursor:pointer;font-weight:700}
details p{margin:8px 0 0}
.card{display:block;border:1px solid var(--line);border-radius:16px;padding:20px;background:var(--surface);box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-3px);border-color:var(--accent2)}
.card h2,.card h3{margin:6px 0 8px;font-size:19px;line-height:1.35}
.card h2 a,.card h3 a{text-decoration:none;color:var(--ink)}
.card p{margin:0;color:var(--muted);font-size:15px}
.tag{font-size:12px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--accent)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:18px 0}
.hero{background:linear-gradient(135deg,var(--hero1),var(--hero2));color:#fff;border-radius:22px;padding:52px 40px;margin:8px 0 12px}
.hero h1{color:#fff;font-size:42px;margin:0 0 14px}
.hero .lead{font-size:19px;color:rgba(255,255,255,.92);max-width:640px;margin:0 0 24px}
.btn{display:inline-block;padding:12px 24px;border-radius:999px;background:#fff;color:#0a5c54;font-weight:700;text-decoration:none;margin:0 10px 8px 0}
.btn.ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7)}
.home h2{margin-top:44px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.fact{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px}
.fact strong{display:block;margin-bottom:4px;color:var(--accent)}
.fact p{margin:0;color:var(--muted);font-size:15px}
footer{margin-top:56px;background:#102a2c;color:#c9dcda;padding:28px 20px;font-size:14px;line-height:1.7}
footer .bar{flex-direction:column;align-items:flex-start;gap:8px}
footer a{color:#fff;text-decoration:none;font-weight:600}
footer a:hover{text-decoration:underline}
a:focus-visible,summary:focus-visible{outline:3px solid var(--accent2);outline-offset:2px}
@media (max-width:640px){body{font-size:16px}main{padding:18px 14px}main>article{padding:22px 18px;border-radius:14px}h1{font-size:28px}.hero{padding:32px 22px;border-radius:18px}.hero h1{font-size:30px}header nav a{padding:6px 10px}}