:root{--ink:#17212b;--muted:#5b6875;--line:#e3e8ee;--bg:#fff;--soft:#f5f7f9;--brand:#0f766e;--brand-dark:#0b5953;--accent:#f59e0b;--radius:12px;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{font-family:var(--font);color:var(--ink);background:var(--bg);margin:0;line-height:1.65}a{color:var(--brand);text-underline-offset:2px}a:hover{color:var(--brand-dark)}.wrap{max-width:1080px;margin:0 auto;padding:0 20px}.narrow{max-width:760px}header.site{border-bottom:1px solid var(--line);z-index:10;background:#fff;position:sticky;top:0}header.site .wrap{justify-content:space-between;align-items:center;gap:16px;height:64px;display:flex}.logo{color:var(--ink);align-items:center;gap:8px;font-size:1.15rem;font-weight:800;text-decoration:none;display:flex}.logo span{color:var(--brand)}nav.main a{color:var(--ink);margin-left:18px;font-weight:500;text-decoration:none}nav.main a:hover{color:var(--brand)}.hero{color:#fff;background:linear-gradient(135deg,#0f766e 0%,#134e4a 100%);padding:64px 0 56px}.hero h1{margin:0 0 14px;font-size:clamp(1.9rem,4vw,2.8rem);line-height:1.15}.hero p{opacity:.92;max-width:640px;margin:0 0 24px;font-size:1.15rem}.btn{background:var(--accent);color:#1f1300;border-radius:999px;padding:12px 20px;font-weight:700;text-decoration:none;display:inline-block}.btn:hover{color:#1f1300;filter:brightness(1.05)}.btn.ghost{color:#fff;background:0 0;border:2px solid #fff9;margin-left:10px}section{padding:44px 0}section h2{margin:0 0 18px;font-size:1.5rem}.grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;display:grid}.card{border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);background:#fff;padding:20px;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:block}.card:hover{border-color:var(--brand);color:var(--ink);box-shadow:0 6px 20px #0f766e14}.card h3{margin:6px 0 8px;font-size:1.1rem;line-height:1.35}.card p{color:var(--muted);margin:0;font-size:.95rem}.tag{text-transform:uppercase;letter-spacing:.04em;color:var(--brand);font-size:.75rem;font-weight:700;display:inline-block}.muted{color:var(--muted)}.notice{background:var(--soft);border-left:4px solid var(--accent);border-radius:6px;margin:18px 0 26px;padding:12px 16px;font-size:.92rem}article.post h1{margin:8px 0 10px;font-size:clamp(1.7rem,3.4vw,2.4rem);line-height:1.2}article.post .meta{color:var(--muted);font-size:.92rem}article.post .body h2{margin-top:2.1em;font-size:1.45rem;line-height:1.3}article.post .body h3{margin-top:1.6em;font-size:1.15rem}article.post .body table{border-collapse:collapse;width:100%;margin:1.2em 0;font-size:.95rem;display:block;overflow-x:auto}article.post .body th,article.post .body td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:8px 10px}article.post .body th{background:var(--soft)}sup.cite a{padding:0 2px;font-size:.75em;font-weight:700;text-decoration:none}.sources{border-top:1px solid var(--line);color:var(--muted);margin-top:40px;padding-top:18px;font-size:.9rem}.sources li{margin-bottom:6px}.crumbs{color:var(--muted);margin:22px 0 0;font-size:.88rem}.crumbs a{color:var(--muted)}.tool{border:1px solid var(--line);border-radius:var(--radius);background:var(--soft);padding:24px}.tool label{margin:14px 0 6px;font-weight:600;display:block}.tool input,.tool select{background:#fff;border:1px solid #c9d2db;border-radius:8px;width:100%;max-width:320px;padding:10px 12px;font-size:1rem}.tool .row{flex-wrap:wrap;gap:16px;display:flex}.tool .row>div{flex:160px}.result{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-top:22px;padding:18px 20px}.bar{background:var(--line);border-radius:99px;height:10px;margin:4px 0 12px;overflow:hidden}.bar>i{background:var(--brand);height:100%;display:block}.ok{color:#047857;font-weight:700}.no{color:#b91c1c;font-weight:700}footer.site{border-top:1px solid var(--line);color:var(--muted);margin-top:40px;padding:28px 0 40px;font-size:.9rem}footer.site a{color:var(--muted);margin-right:16px}@media (max-width:640px){nav.main a{margin-left:12px;font-size:.92rem}.btn.ghost{margin:10px 0 0}}.logo{white-space:nowrap}article.post .body blockquote{border-left:4px solid var(--line);color:var(--muted);margin:1.2em 0;padding:4px 16px}@media (max-width:420px){.logo{font-size:1rem}nav.main a{margin-left:10px;font-size:.88rem}}
