:root{--ink:#172d33;--muted:#4d656c;--brand:#075f58;--wash:#edf6f2;--line:#d2dfdc;--paper:#fff;--back:#f6f8f6;--error:#932e26;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--back);font-synthesis:none;color-scheme:light}*{box-sizing:border-box}body{margin:0;line-height:1.55;background:var(--back);color:var(--ink)}a{color:var(--brand);text-underline-offset:3px}button,input{font:inherit}button{cursor:pointer}:focus-visible{outline:3px solid #a9400c;outline-offset:4px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:absolute;left:16px;top:-100px;z-index:5;background:#fff;padding:12px}.skip:focus{top:10px}.wrap{width:min(1060px,100% - 40px);margin:auto}.top{background:#fff;border-bottom:1px solid var(--line)}.top .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0}.brand{font-size:1.35rem;font-weight:750;letter-spacing:-.04em;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:10px}.mark{display:inline-flex;justify-content:center;align-items:center;width:34px;height:34px;border:2px solid var(--brand);border-radius:50%;font-size:.7rem;color:var(--brand)}.tag{font-size:.8rem;color:var(--muted)}main{padding:32px 0 50px}.eyebrow{font-size:.75rem;font-weight:700;letter-spacing:.13em;color:var(--brand);text-transform:uppercase;margin:0 0 8px}h1{font-size:clamp(1.8rem,5vw,2.6rem);line-height:1.15;letter-spacing:-.035em;margin:0 0 12px}h2{font-size:1.25rem;line-height:1.3}.intro{margin:0 0 22px;max-width:760px;color:var(--muted)}.tabs{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 20px}.tabs a{background:#fff;border:1px solid #70847f;border-radius:8px;min-height:44px;padding:10px 14px;text-decoration:none;font-size:.9rem;font-weight:600}.tabs a[aria-current=page]{background:var(--ink);color:#fff;border-color:var(--ink)}.grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}label{font-size:.86rem;font-weight:650}input{width:100%;border:1px solid #70847f;border-radius:7px;min-height:46px;padding:9px 10px;background:#fff;color:var(--ink);font-variant-numeric:tabular-nums;font-size:1.05rem}input[aria-invalid=true]{border:2px solid var(--error)}.triple{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.primary,.secondary,.example{border:1px solid var(--brand);border-radius:7px;min-height:46px;padding:10px 16px;font-weight:650}.primary{background:var(--brand);color:#fff}.secondary,.example{background:#fff;color:var(--brand)}.result{margin-top:18px;background:var(--wash);border:1px solid #bcd6ca;border-radius:10px;padding:18px}.result strong{display:block;font-size:1.55rem;line-height:1.2;letter-spacing:-.025em;overflow-wrap:anywhere}.meta{margin:10px 0 0;color:var(--muted);font-size:.9rem}.error{color:var(--error);font-weight:650;min-height:24px}.examples{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap}.example{font-size:.82rem;min-height:40px;padding:8px 10px}.info{margin:28px 0 0;padding:16px 18px;background:#fff;border-left:3px solid var(--brand)}.prose{max-width:800px;margin-top:34px}.prose p,.prose li{color:var(--muted)}details{border-top:1px solid var(--line);padding:14px 0}summary{font-weight:650;cursor:pointer}.bottom{border-top:1px solid var(--line);background:#fff;padding:26px 0}.bottom .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.bottom p{font-size:.8rem;color:var(--muted);margin:0}.foot-links{display:flex;gap:18px;flex-wrap:wrap;font-size:.8rem}.hint{font-size:.82rem;color:var(--muted);margin:0}.no-js{background:#fff7e8;padding:14px;border-radius:8px}@media(max-width:800px){.grid{grid-template-columns:1fr}.wrap{width:calc(100% - 28px)}.card{padding:18px}.tag{display:none}.tabs{gap:6px}.tabs a{font-size:.79rem;padding:10px}.triple{gap:8px}.actions .primary{flex:1}}@media(max-width:430px){.triple{grid-template-columns:1fr}.examples{display:grid}.bottom .wrap{display:block}.foot-links{margin-top:16px}}