:root{--bg:#fafaf7;--card:#fff;--ink:#1d1d1b;--muted:#5f5f5a;--line:#e3e2dc;--accent:#2f6f5e;--accent-ink:#fff;--soft:#eaf3ef}
*{box-sizing:border-box}
html{font-size:17px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.55}
header{border-bottom:1px solid var(--line);background:var(--card)}
header .wrap{display:flex;align-items:center;justify-content:space-between;padding:.8rem 1rem}
.brand{font-weight:700;text-decoration:none;color:var(--ink);letter-spacing:.3px}
.brand span{color:var(--accent)}
nav a{color:var(--muted);text-decoration:none;margin-left:1rem;font-size:.95rem}
.wrap{max-width:760px;margin:0 auto;padding:0 1rem}
main{padding:1.5rem 0 3rem}
h1{font-size:1.9rem;line-height:1.2;margin:.2rem 0 .4rem}
h2{font-size:1.3rem;margin:2rem 0 .5rem}
h3{font-size:1.05rem;margin:1.2rem 0 .3rem}
p.lede{color:var(--muted);margin-top:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1.2rem;margin:1.2rem 0}
.grid{display:grid;gap:.9rem;grid-template-columns:1fr 1fr}
@media(max-width:560px){.grid{grid-template-columns:1fr}}
label{display:block;font-weight:600;font-size:.92rem;margin-bottom:.25rem}
input,select{width:100%;padding:.6rem .7rem;border:1px solid var(--line);border-radius:8px;font-size:1rem;background:#fff;color:var(--ink)}
.row3{display:grid;gap:.6rem;grid-template-columns:1fr 1fr 1fr}
.tabs{display:flex;gap:.4rem;margin-bottom:1rem;flex-wrap:wrap}
.tabs button{border:1px solid var(--line);background:#fff;padding:.45rem .8rem;border-radius:999px;cursor:pointer;font-size:.92rem}
.tabs button[aria-selected=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.hidden{display:none}
.result{background:var(--soft);border-radius:10px;padding:1rem;margin-top:1rem}
.result .big{font-size:2.1rem;font-weight:700;line-height:1.1}
.result .sub{color:var(--muted);font-size:.95rem}
.result dl{display:grid;grid-template-columns:auto 1fr;gap:.25rem .8rem;margin:.8rem 0 0;font-size:.95rem}
.result dt{color:var(--muted)}
.result dd{margin:0}
details{margin-top:.8rem}
summary{cursor:pointer;font-weight:600}
pre{white-space:pre-wrap;font-size:.86rem;background:#f4f4f0;padding:.8rem;border-radius:8px;overflow:auto}
table{border-collapse:collapse;width:100%;font-size:.95rem;margin:.6rem 0}
th,td{text-align:left;padding:.45rem .5rem;border-bottom:1px solid var(--line)}
th{font-weight:600}
.note{font-size:.88rem;color:var(--muted)}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:.88rem;padding:1.2rem 0}
footer a{color:var(--muted)}
ul.tools{list-style:none;padding:0}
ul.tools li{padding:.6rem 0;border-bottom:1px solid var(--line)}
ul.tools a{font-weight:600;text-decoration:none;color:var(--accent)}
ul.tools small{display:block;color:var(--muted)}
.ad{min-height:90px;margin:1.2rem 0}