:root{--ink:#1d2421;--muted:#5b6661;--line:#dfe5e1;--bg:#fff;--soft:#f5f8f6;--accent:#2f6b4f;--accent-ink:#fff;--warn:#8a5a00}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:960px;margin:0 auto;padding:0 18px}
a{color:var(--accent)}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;margin:0!important;padding:0}
.site-header{border-bottom:1px solid var(--line);background:#fff}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 18px;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.1rem;color:var(--ink);text-decoration:none}
.brand-mark{width:22px;height:22px;border-radius:6px;background:var(--accent);display:inline-block;box-shadow:inset 0 -7px 0 #a7d3bb}
.site-header nav{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.95rem}
.site-header nav a{text-decoration:none;color:var(--muted);padding:4px 0}
.site-header nav a[aria-current]{color:var(--ink);border-bottom:2px solid var(--accent)}
h1{font-size:2rem;line-height:1.2;margin:22px 0 6px}
h2{font-size:1.4rem;line-height:1.3;margin:36px 0 10px}
h3{font-size:1.05rem;margin:22px 0 4px}
.lead{color:var(--muted);margin:0 0 14px;font-size:1.05rem}
.answer{border-left:4px solid var(--accent);background:var(--soft);padding:12px 16px;margin:12px 0 18px;font-size:1.05rem}
.answer p{margin:0}
.tool{border:1px solid var(--line);border-radius:12px;padding:14px 16px 6px;background:var(--soft)}
.tool h2,.tool h3{margin:2px 0 10px;font-size:1.2rem}
.tool fieldset{border:0;padding:0;margin:0 0 10px;display:flex;flex-wrap:wrap;gap:6px}
.tool legend{font-size:.85rem;color:var(--muted);margin-bottom:4px;width:100%;float:left}
.seg{position:relative}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg span{display:inline-block;border:1px solid #2c7a57;color:#256446;background:#fff;border-radius:8px;padding:7px 12px;font-size:.95rem;line-height:1.2}
.seg small{color:inherit}
.seg input:checked+span{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.seg input:focus-visible+span{outline:3px solid #9cc9b2;outline-offset:1px}
.row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.field{display:flex;flex-direction:column;gap:3px}
.field.amount{flex:1 1 140px}
.field.ing{flex:3 1 260px}
.lbl{font-size:.85rem;color:var(--muted)}
.hint{font-size:.78rem;color:var(--muted)}
input[name=amount],select{font:inherit;font-size:1.05rem;padding:9px 10px;border:1px solid #b9c4be;border-radius:8px;background:#fff;color:var(--ink);width:100%;min-height:44px}
.result{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:6px 0 10px}
.result .main{font-size:1.25rem;margin:2px 0 6px}
.result .main strong{color:var(--accent)}
.alts{display:flex;flex-wrap:wrap;gap:6px 22px;margin:0 0 6px}
.alts div{min-width:110px}
.alts dt{font-size:.78rem;color:var(--muted)}
.alts dd{margin:0;font-weight:600}
.formula,.src{font-size:.9rem;color:var(--muted);margin:4px 0}
.formula span{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--ink)}
.facts{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:.9rem;color:var(--muted);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:8px 0;margin:22px 0}
.facts b{color:var(--ink)}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:8px 0 6px}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border-bottom:1px solid var(--line);padding:7px 8px;text-align:left;vertical-align:top}
thead th{background:var(--soft);font-size:.85rem;color:var(--muted);white-space:nowrap}
td.n,th.n{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
tbody th[colspan]{background:#fbfcfb;color:var(--accent);font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}
tbody th[scope=row]{font-weight:500}
.caption-note{font-size:.85rem;color:var(--muted)}
code{background:var(--soft);padding:1px 5px;border-radius:4px}
ul,ol{padding-left:22px}
li{margin:4px 0}
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin:10px 0}
.related a{display:block;border:1px solid var(--line);border-radius:10px;padding:12px 14px;text-decoration:none;color:var(--ink)}
.related a strong{color:var(--accent);display:block}
.faq h3{margin-top:18px}
.site-footer{margin-top:48px;border-top:1px solid var(--line);background:var(--soft);font-size:.9rem;color:var(--muted)}
.site-footer nav{display:flex;flex-wrap:wrap;gap:6px 16px;padding-top:16px}
.site-footer p{padding-bottom:18px}
.ad-slot{min-height:0}
@media (max-width:600px){h1{font-size:1.6rem}h2{font-size:1.25rem}.tool{padding:12px}.result .main{font-size:1.12rem}.site-header nav{font-size:.9rem}}
.convert{font:inherit;font-size:.95rem;background:#fff;color:#2c7a57;border:1px solid #2c7a57;border-radius:8px;padding:7px 16px;margin:0 0 10px;cursor:pointer;min-height:40px}
.convert:hover{background:var(--accent);color:#fff}
.result .paren{color:var(--muted);font-size:.95em}
.round{font-size:.8rem;color:var(--muted);margin:2px 0 4px}
.more{padding-left:20px}
.more .soon{color:var(--muted);font-weight:600}
.more small{color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:0 6px;margin-left:4px;font-size:.75rem}
.tool-note{font-size:.85rem;color:var(--muted);margin:0 0 8px}