:root{--bg:#fbfaf7;--fg:#1d1f23;--muted:#5d636d;--card:#fff;--line:#e4e1da;--brand:#b04a0a;--brand-ink:#fff;--soft:#fdecd9;--ok:#1d7a46;--warn:#9a5b00}
@media (prefers-color-scheme:dark){:root{--bg:#121417;--fg:#ececea;--muted:#a3a8b0;--card:#1b1e23;--line:#2c3038;--brand:#f5a524;--brand-ink:#111;--soft:#3a2914;--ok:#5fd08f;--warn:#f0b35a}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif}
a{color:var(--brand)}a:hover{text-decoration-thickness:2px}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px}.skip:focus{left:8px;top:8px;background:var(--card);padding:8px;z-index:9}
header.site{border-bottom:1px solid var(--line);background:var(--card)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding-top:12px;padding-bottom:12px}
.logo{font-weight:800;font-size:20px;text-decoration:none;color:var(--fg);letter-spacing:-.02em}.logo span{color:var(--brand)}
nav.top a{margin-left:14px;font-size:15px;text-decoration:none;color:var(--muted)}nav.top a:hover{color:var(--brand)}
main{padding:24px 0 40px}
h1{font-size:clamp(26px,5vw,38px);line-height:1.2;letter-spacing:-.02em;margin:.2em 0 .4em}
h2{font-size:clamp(21px,3.4vw,26px);line-height:1.3;margin:1.8em 0 .5em}h3{font-size:19px;margin:1.4em 0 .4em}
.lead{font-size:19px;color:var(--muted)}
.meta{font-size:14px;color:var(--muted)}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:6px}.crumbs a{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.grid a.card{text-decoration:none;color:var(--fg);display:block}.grid a.card:hover{border-color:var(--brand)}
.grid a.card strong{display:block;font-size:18px;margin-bottom:4px;color:var(--brand)}
.grid a.card span{font-size:15px;color:var(--muted)}
.tag{display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;background:var(--soft);color:var(--fg);border-radius:6px;padding:2px 8px;margin-bottom:6px}
.tool{background:var(--card);border:2px solid var(--brand);border-radius:16px;padding:18px;margin:18px 0}
.tool label{display:block;font-weight:600;font-size:15px;margin:12px 0 4px}
.tool input,.tool select{width:100%;font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--fg)}
.tool .row{display:grid;gap:0 14px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.tool button{margin-top:16px;font:inherit;font-weight:700;background:var(--brand);color:var(--brand-ink);border:0;border-radius:10px;padding:12px 20px;cursor:pointer;width:100%}
.result{margin-top:16px;background:var(--soft);border-radius:12px;padding:14px 16px}
.result .big{font-size:30px;font-weight:800;line-height:1.2}
table{width:100%;border-collapse:collapse;font-size:15px;margin:12px 0}th,td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--soft)}
.tbl{overflow-x:auto}
.note{border-left:4px solid var(--warn);background:var(--card);padding:10px 14px;border-radius:0 10px 10px 0;font-size:15px}
.toc{font-size:15px}.toc ol{margin:6px 0;padding-left:20px}
footer.site{border-top:1px solid var(--line);background:var(--card);font-size:14px;color:var(--muted);padding:22px 0}
footer.site nav a{color:var(--muted);margin-right:14px;display:inline-block;margin-bottom:6px}
.ad-slot{min-height:100px;margin:20px 0}
@media (max-width:560px){nav.top a{margin:0 12px 0 0}body{font-size:16px}}