:root{--ink: #1a2332;--ink-soft: #4a5a70;--paper: #fbfaf8;--card: #ffffff;--line: #e5e2dc;--brand: #14532d;--brand-soft: #e8f2ea;--accent: #b45309;--radius: 10px;font-family:Segoe UI,system-ui,-apple-system,Arial,sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0;line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}main{max-width:880px;margin:0 auto;padding:0 20px 64px}.site-header{border-bottom:1px solid var(--line);background:var(--card)}.site-header .inner{max-width:880px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.site-header .logo{font-weight:700;font-size:19px;color:var(--brand);text-decoration:none}.site-header .logo span{color:var(--ink-soft);font-weight:400}.site-nav{display:flex;gap:4px;flex-wrap:wrap}.site-nav a{text-decoration:none;color:var(--ink-soft);font-size:14px;padding:6px 10px;border-radius:6px}.site-nav a:hover{background:var(--brand-soft);color:var(--brand)}.site-nav a[aria-current=page]{color:var(--brand);font-weight:600}.site-footer{border-top:1px solid var(--line);background:var(--card);margin-top:48px}.site-footer .inner{max-width:880px;margin:0 auto;padding:28px 20px;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px;font-size:14px;color:var(--ink-soft)}.site-footer h2{font-size:13px;text-transform:uppercase;letter-spacing:.06em;margin:0 0 8px}.site-footer a{color:var(--ink-soft);text-decoration:none;display:block;padding:2px 0}.site-footer a:hover{color:var(--brand);text-decoration:underline}.site-footer .legal{grid-column:1 / -1;border-top:1px solid var(--line);padding-top:14px;font-size:13px}h1{font-size:clamp(26px,4.5vw,36px);line-height:1.2;margin:18px 0 10px}h2{font-size:22px;margin:36px 0 10px}h3{font-size:17px;margin:22px 0 8px}p{margin:10px 0}.lede{font-size:17px;color:var(--ink-soft)}.breadcrumbs{font-size:13px;color:var(--ink-soft);margin-top:14px}.breadcrumbs a{color:var(--ink-soft)}.breadcrumbs a:hover{color:var(--brand)}.breadcrumbs nav{display:inline}.converter{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:18px 0;box-shadow:0 1px 3px #1a23320d}.converter .row{display:flex;flex-wrap:wrap;gap:10px;align-items:end}.converter label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--ink-soft)}.converter select,.converter input{font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;min-width:110px;color:var(--ink)}.converter input{width:110px}.converter select:focus-visible,.converter input:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.results{margin-top:16px}.results .grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.result-card{border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:#fff}.result-card .system{font-size:12px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}.result-card .value{font-size:22px;font-weight:700;margin-top:2px}.result-card .value.pair{font-size:17px}.result-card .flag{font-size:12px;color:var(--accent);margin-top:2px}.result-card .note{font-size:12px;color:var(--ink-soft);margin-top:4px}.hint{font-size:13px;color:var(--ink-soft);margin-top:12px}table.chart{border-collapse:collapse;width:100%;font-size:14px;background:#fff}table.chart th,table.chart td{border:1px solid var(--line);padding:7px 10px;text-align:left}table.chart th{background:var(--brand-soft);color:var(--brand);font-weight:600}table.chart td.num,table.chart th.num{text-align:right;font-variant-numeric:tabular-nums}.table-wrap{overflow-x:auto;margin:12px 0}.source-note{display:flex;gap:8px;align-items:start;font-size:13px;color:var(--ink-soft);background:var(--brand-soft);border-radius:8px;padding:10px 12px;margin:12px 0}.source-note:before{content:"✓";color:var(--brand);font-weight:700}.related ul{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}.related a{display:block;padding:10px 12px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink);background:#fff;font-size:14px}.related a:hover{border-color:var(--brand);color:var(--brand)}.faq details{border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:8px 0;background:#fff}.faq summary{cursor:pointer;font-weight:600}.faq details[open] summary{margin-bottom:6px}.card-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin:16px 0}.card-list a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;text-decoration:none;color:var(--ink)}.card-list a:hover{border-color:var(--brand)}.card-list .t{font-weight:600}.card-list .d{font-size:13px;color:var(--ink-soft);margin-top:4px}@media(max-width:480px){.converter .row{flex-direction:column;align-items:stretch}.converter select,.converter input{width:100%}}