:root{color-scheme:light;--paper:#f4f0e7;--ink:#191b1e;--blue:#2156b8;--line:#d2ccbf}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 Arial,Helvetica,sans-serif}header,footer{max-width:1320px;margin:auto;padding:24px 32px;display:flex;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line)}header a,footer a{color:inherit;text-decoration:none}nav{display:flex;gap:20px}main{max-width:1260px;margin:auto;padding:48px 32px}.eyebrow{color:var(--blue);font-size:12px;letter-spacing:.13em;text-transform:uppercase}h1{font-size:clamp(48px,7vw,92px);letter-spacing:-.055em;line-height:1.03;margin:16px 0 26px;font-weight:500}.intro{font-size:22px;max-width:680px}.lab{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:36px;align-items:start;margin-top:36px}.viewer{position:sticky;top:16px;min-width:0}.viewer svg{width:100%;display:block;background:#fcfaf5;border:1px solid var(--line)}.viewer p{font-size:13px;color:#555}.controls{display:grid;gap:16px}h2{font-weight:500;letter-spacing:-.025em;line-height:1.2;font-size:30px}h3{font-size:20px;font-weight:500}label{display:block;font-size:15px}input,select,textarea,button{font:inherit;font-size:16px}input[type=range]{width:100%;min-height:44px;accent-color:var(--blue)}output{float:right;font-variant-numeric:tabular-nums}button,.download{min-height:44px;border:1px solid var(--line);padding:12px 18px;background:transparent;color:var(--ink);cursor:pointer;text-decoration:none;border-radius:4px}button.primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.row{display:flex;gap:10px;flex-wrap:wrap}.row>*{flex:1}select,textarea{width:100%;padding:12px;border:1px solid var(--line);background:#fcfaf5;color:var(--ink);border-radius:4px}textarea{resize:vertical;min-height:100px}.note{font-size:13px;color:#565855;margin:6px 0}details{border-top:1px solid var(--line);padding:16px 0}summary{min-height:44px;cursor:pointer}details label{margin-top:10px}.copy{max-width:760px;margin:72px auto}.copy section{padding:30px 0;border-top:1px solid var(--line)}.formula{overflow-x:auto;background:#e8e3d9;padding:20px;font:16px/1.8 monospace}.copy a{color:var(--blue)}.export{margin-top:8px;padding-top:16px;border-top:1px solid var(--line)}dialog{width:min(94vw,520px);max-height:90dvh;overflow:auto;padding:22px;border:1px solid var(--line);background:var(--paper);color:var(--ink)}dialog::backdrop{background:#191b1e99}dialog img{display:block;width:100%;max-height:48dvh;object-fit:contain;margin:12px 0}.status{min-height:24px;font-size:14px}.download{display:inline-block}footer{border-top:1px solid var(--line);border-bottom:0;font-size:13px}@media(max-width:700px){header,footer{padding:20px;font-size:12px}header nav{gap:12px}main{padding:28px 20px}.intro{font-size:19px}.lab{grid-template-columns:1fr;gap:14px;margin-top:24px}.viewer{position:static}.copy{margin:48px auto}.controls h2{margin:6px 0;font-size:25px}.row{gap:8px}h1{font-size:54px}.viewer p{margin:8px 0}dialog{padding-bottom:max(22px,env(safe-area-inset-bottom))}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}