.ring-calculator{max-width:1100px;margin:42px auto;padding:32px;border:1px solid var(--line);background:var(--white);scroll-margin-top:110px}.ring-calculator h2{font:400 30px var(--serif);margin:0 0 12px}.ring-calculator p{line-height:1.7}.ring-calculator-heading{margin-bottom:22px}.ring-calculator-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:30px;align-items:start}.ring-calculator figure{margin:0;color:var(--green)}.ring-calculator svg{display:block;width:100%;max-width:360px;margin:auto}.ring-calculator [hidden]{display:none}.ring-calculator figcaption,.ring-measure-note{font-size:12px;color:var(--muted);line-height:1.7}.ring-calculator form{display:grid;gap:10px}.ring-calculator label{font-size:13px;font-weight:600}.ring-calculator input,.ring-calculator select{width:100%;min-height:46px;padding:10px 12px;border:1px solid var(--line);color:var(--ink);background:var(--paper);border-radius:0}.ring-calculator input[aria-invalid=true]{border-color:#b76955}.ring-measure-instruction{font-size:13px;margin:3px 0 8px}#ringMeasureResult{font-size:19px;color:var(--green);margin:5px 0;min-height:30px}.ring-calculator a{display:inline-block;padding:8px 0;text-decoration:underline;font-size:12px}@media(max-width:620px){.ring-calculator{padding:22px 18px;margin:30px auto}.ring-calculator h2{font-size:26px}.ring-calculator-grid{grid-template-columns:1fr;gap:22px}.ring-calculator svg{max-width:260px}}