:root{
  --bg:#0f1f1c;--surface:#13302a;--surface-2:#19403a;--ink:#eaf5ef;--muted:#9fc6b6;
  --accent:#3fd089;--accent-ink:#06251a;--line:rgba(255,255,255,.10);--radius:16px;
  --maxw:980px;font-synthesis:none;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(1200px 600px at 70% -10%,#1c4339 0,var(--bg) 55%);
  color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;}
a{color:var(--accent)}
.skip-link{position:absolute;left:-999px}
.skip-link:focus{left:12px;top:12px;background:var(--accent);color:var(--accent-ink);padding:8px 12px;border-radius:8px;z-index:20}
.site-header,main,.site-footer{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:18px;padding-bottom:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none}
.brand-mark{width:22px;height:22px;border-radius:50% 50% 50% 50%/60% 60% 40% 40%;
  background:linear-gradient(160deg,var(--accent),#1f8f63);box-shadow:0 0 0 3px rgba(63,208,137,.18)}
.site-header nav{display:flex;gap:16px;flex-wrap:wrap}
.site-header nav a{color:var(--muted);text-decoration:none;font-weight:600}
.site-header nav a:hover{color:var(--ink)}
.hero{padding:26px 0 8px}
.eyebrow{color:var(--accent);font-weight:700;letter-spacing:.04em;text-transform:uppercase;font-size:13px;margin:0 0 6px}
.eyebrow a{color:var(--accent);text-decoration:none}
h1{font-size:clamp(28px,5vw,42px);line-height:1.1;margin:.1em 0 .25em}
h2{font-size:clamp(20px,3vw,26px);margin:0 0 .4em}
h3{margin:0;font-size:18px}
.lede{color:var(--muted);font-size:18px;max-width:64ch}
.band{padding:26px 0;border-top:1px solid var(--line)}
.band.split{display:grid;grid-template-columns:1.4fr .8fr;gap:28px;align-items:start}
.section-heading{margin-bottom:14px}
.prose p{max-width:68ch;color:#d7ece2}
.check-list{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:10px}
.check-list li{position:relative;padding-left:26px;color:#d7ece2}
.check-list li::before{content:"";position:absolute;left:0;top:9px;width:12px;height:12px;border-radius:3px;background:var(--accent)}
.formula-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:grid;gap:4px}
.formula-box span{color:var(--muted);font-size:13px}
.formula-box strong{font-size:18px}
.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
.button{display:inline-block;background:var(--surface-2);color:var(--ink);border:1px solid var(--line);
  border-radius:999px;padding:10px 18px;font-weight:700;text-decoration:none;cursor:pointer;font-size:15px}
.button:hover{border-color:var(--accent)}
.button.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.button.ghost{background:transparent}
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-top:14px}
.tool-controls{display:flex;flex-direction:column;gap:14px;margin-bottom:16px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--surface-2);color:var(--muted);border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;font-weight:600;cursor:pointer;font-size:14px}
.chip[aria-checked="true"]{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.tool-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.tool-hint{color:var(--muted);font-size:14px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.name-card{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:8px}
.name-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}
.card-note{color:var(--muted);font-size:13px;margin:0;flex:1}
.card-meaning{color:var(--accent);font-size:12px;font-weight:600}
.fav{background:none;border:none;color:var(--muted);font-size:20px;line-height:1;cursor:pointer;padding:2px}
.fav[aria-pressed="true"]{color:#ff8aa6}
.copy{align-self:flex-start;background:transparent;border:1px solid var(--line);color:var(--ink);
  border-radius:8px;padding:5px 12px;font-size:13px;font-weight:600;cursor:pointer}
.copy:hover{border-color:var(--accent)}
.copy.copied{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.shortlist .button-row{margin-top:16px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.related-grid a{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;
  text-decoration:none;color:var(--ink);display:grid;gap:4px}
.related-grid a:hover{border-color:var(--accent)}
.related-grid a span{color:var(--muted);font-size:13px}
.faq-list{display:grid;gap:10px}
.faq{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:6px 16px}
.faq summary{cursor:pointer;font-weight:700;padding:8px 0}
.faq p{color:#d7ece2;margin:0 0 10px}
.banner-noindex{background:#3a2a12;border:1px solid #6b4d1f;color:#ffd99b;border-radius:12px;padding:12px 16px;margin:14px 0;font-size:14px}
.banner-noindex code{background:rgba(0,0,0,.3);padding:1px 6px;border-radius:5px}
.site-footer{padding:30px 20px 50px;color:var(--muted);border-top:1px solid var(--line);margin-top:20px}
.footer-meta a{color:var(--muted)}
@media(max-width:720px){.band.split{grid-template-columns:1fr}}
@media print{
  .site-header,.site-footer,.tool-controls,.button-row,.fav,.copy,.related-grid,.faq-list,.banner-noindex{display:none!important}
  body{background:#fff;color:#000}
  .name-card{border:1px solid #ccc;break-inside:avoid}
}