:root{--bg:#F6F3EC;--card:#fff;--ink:#11141B;--muted:#5B6170;--line:#E3DED3;--brand:#0B7A5C;--pri:#11141B;--prifg:#fff;--chip:#ECE6DA;--ok:#0B7A5C;--warn:#A4460F}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#11141B;--card:#1A1E27;--ink:#EDEAE3;--muted:#9AA1B0;--line:#2A303C;--brand:#2FD3A0;--pri:#2FD3A0;--prifg:#11141B;--chip:#2A303C;--ok:#2FD3A0;--warn:#FFB347}}
:root[data-theme="dark"]{--bg:#11141B;--card:#1A1E27;--ink:#EDEAE3;--muted:#9AA1B0;--line:#2A303C;--brand:#2FD3A0;--pri:#2FD3A0;--prifg:#11141B;--chip:#2A303C;--ok:#2FD3A0;--warn:#FFB347}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
header,main,footer{max-width:820px;margin:0 auto;padding:0 16px}header{padding-top:22px;display:flex;gap:6px 16px;align-items:center;flex-wrap:wrap}
header a.brand{font-weight:800;font-size:20px;text-decoration:none;color:var(--ink);margin-right:auto}nav{display:flex;flex-wrap:wrap;gap:4px 14px}nav a{color:var(--muted);text-decoration:none;white-space:nowrap;font-size:15px}
h1{font-size:32px;line-height:1.15;margin:18px 0 6px;letter-spacing:-.01em}h2{font-size:22px;margin:30px 0 8px}h3{font-size:17px;margin:20px 0 4px}
.lede{font-size:18px;margin:0 0 14px}.meta{color:var(--muted);font-size:14px}a{color:inherit;text-decoration-color:var(--brand);text-underline-offset:2px}
.calc{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;margin:16px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
label{display:block;font-size:14px;color:var(--muted);font-weight:600;margin-bottom:4px}
input,select{width:100%;font:inherit;font-size:18px;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
input:focus,select:focus{outline:2px solid var(--brand);outline-offset:1px}
.out{margin-top:14px;padding:14px;border-radius:12px;background:var(--chip)}
.big{font-size:40px;font-weight:800;line-height:1.1;letter-spacing:-.02em}.sub{color:var(--muted);font-size:15px}
.ok{color:var(--ok);font-weight:700}.warn{color:var(--warn);font-weight:700}
table{border-collapse:collapse;width:100%;font-size:15px}th,td{padding:7px 8px;border-bottom:1px solid var(--line);text-align:left}th{font-size:13px;color:var(--muted)}
td.r,th.r{text-align:right;font-variant-numeric:tabular-nums}
.tw{overflow-x:auto}.cta{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;margin:26px 0}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-top:10px}
.card{display:block;text-decoration:none;border:1px solid var(--line);border-radius:12px;padding:12px;background:var(--bg)}.card b{display:block}.card span{color:var(--muted);font-size:14px}
.btn{display:inline-block;padding:9px 14px;border-radius:10px;text-decoration:none;font-weight:700;font-size:15px;background:var(--pri);color:var(--prifg)}
.note{border-left:3px solid var(--brand);background:var(--card);padding:10px 14px;border-radius:0 10px 10px 0;margin:14px 0;font-size:14px;color:var(--muted)}
footer{color:var(--muted);font-size:14px;padding:16px 16px 32px;border-top:1px solid var(--line);margin-top:30px}
@media (max-width:520px){h1{font-size:26px}.big{font-size:32px}}