:root{--bg:#fbfaf7;--fg:#1c1b18;--muted:#6b675f;--line:#e6e2d8;--accent:#b8321a;--accent-ink:#fff;--card:#fff;--code:#14130f;--code-fg:#e9e6dc;--ok:#2f7a3d}
@media (prefers-color-scheme:dark){:root{--bg:#141310;--fg:#ece8dc;--muted:#a49f93;--line:#2c2a25;--accent:#ff6b4a;--accent-ink:#141310;--card:#1c1b17;--code:#0b0b09;--code-fg:#e9e6dc;--ok:#7bd389}}
*{box-sizing:border-box}html{color-scheme:light dark}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent)}h1,h2,h3{line-height:1.2;letter-spacing:-.01em}h1{font-size:2.4rem;margin:.2em 0 .4em}h2{font-size:1.5rem;margin:2em 0 .6em}h3{font-size:1.15rem;margin:1.6em 0 .4em}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line)}header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{font-weight:700;text-decoration:none;color:var(--fg);font-size:1.1rem}.brand span{color:var(--accent)}
nav{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:flex-end}nav a{text-decoration:none;color:var(--muted);font-size:.95rem;white-space:nowrap}nav a:hover{color:var(--fg)}
.hero{padding:56px 0 24px}.hero p.lead{font-size:1.25rem;color:var(--muted);max-width:640px}
.cta{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:12px 20px;border-radius:8px;text-decoration:none;font-weight:600;margin:8px 12px 8px 0}
.cta.secondary{background:transparent;color:var(--fg);border:1px solid var(--line)}
pre{background:var(--code);color:var(--code-fg);padding:18px 20px;border-radius:10px;overflow-x:auto;font:14px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
code{font:.92em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--line);padding:1px 5px;border-radius:4px}pre code{background:none;padding:0}
.email{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px 24px;white-space:pre-wrap;font:15px/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;position:relative}
.email .subj{font-weight:700;display:block;margin-bottom:12px;border-bottom:1px solid var(--line);padding-bottom:10px}
button.copy{position:absolute;top:12px;right:12px;font:13px inherit;padding:5px 10px;border:1px solid var(--line);background:var(--bg);color:var(--fg);border-radius:6px;cursor:pointer}
table{border-collapse:collapse;width:100%;margin:1em 0;font-size:.95rem}th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-weight:600}td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:1em 0}
.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 18px;text-decoration:none;color:var(--fg)}.card:hover{border-color:var(--accent)}.card b{display:block;margin-bottom:4px}.card span{color:var(--muted);font-size:.92rem}
.ladder{list-style:none;padding:0;margin:1em 0}.ladder li{display:grid;grid-template-columns:90px 1fr;gap:14px;padding:12px 0;border-bottom:1px solid var(--line)}.ladder .when{font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.note{border-left:3px solid var(--accent);padding:6px 16px;color:var(--muted);margin:1.2em 0}
label{display:block;margin:12px 0 4px;font-weight:600}input,select{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:var(--card);color:var(--fg);width:100%;max-width:280px}
.result{font-size:1.6rem;font-weight:700;margin:16px 0 4px}.result small{font-size:1rem;color:var(--muted);font-weight:400}
footer{border-top:1px solid var(--line);margin-top:72px;padding:28px 0;color:var(--muted);font-size:.9rem}footer a{color:var(--muted)}
.crumbs{color:var(--muted);font-size:.9rem;margin-top:28px}.crumbs a{color:var(--muted)}
@media(max-width:600px){h1{font-size:1.8rem}header.top .wrap{height:auto;padding:12px 20px;flex-wrap:wrap;gap:8px}nav{gap:4px 12px;justify-content:flex-start}nav a{font-size:.85rem}.ladder li{grid-template-columns:70px 1fr}}