:root{color-scheme:light;--ink:#192626;--muted:#61706c;--line:#d8e0da;--paper:#f5f7f1;--green:#1d6751;--lime:#d3f47c;font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.7}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1120px,calc(100% - 64px));margin:auto}.masthead{min-height:108px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;font-size:23px;font-weight:750;letter-spacing:-.5px}.mark{display:grid;place-items:center;width:35px;height:35px;border-radius:9px;background:var(--green);color:white;font-size:23px}.brand-detail{margin-left:12px;font-size:10px;letter-spacing:1.7px;color:var(--muted);font-weight:600}.nav-link{font-size:13px}.nav-link span{margin-left:16px;color:var(--green)}.hero{padding-top:89px;padding-bottom:84px}.eyebrow{margin:0 0 23px;font-size:11px;letter-spacing:1.8px;font-weight:650;color:var(--green)}.dot{display:inline-block;width:7px;height:7px;margin-right:8px;background:var(--green);border-radius:50%}h1{font-size:clamp(42px,5.5vw,68px);line-height:1.3;letter-spacing:-2px;font-weight:650;margin:0 0 27px}.lead{max-width:650px;color:var(--muted);font-size:16px;line-height:1.9}.site-label{display:flex;gap:18px;align-items:center;margin-top:35px;font-size:12px}.site-label span{color:var(--muted)}.site-label strong{font-family:ui-monospace,SFMono-Regular,monospace;font-size:12px;font-weight:500;overflow-wrap:anywhere}.test-section{padding:52px;border:1px solid #c9d4cb;border-radius:20px;background:#edf2e7;display:grid;grid-template-columns:1.2fr 1fr;gap:70px;align-items:center}h2{font-size:28px;letter-spacing:-.7px;line-height:1.4;margin:0 0 20px;font-weight:650}.test-copy p:not(.eyebrow){font-size:14px;color:var(--muted)}code{font-size:12px;background:#e1e8dc;padding:2px 5px;border-radius:3px}button{border:0;border-radius:7px;background:var(--green);color:white;padding:15px 20px;font:inherit;font-size:13px;font-weight:600;margin-top:16px;cursor:pointer;display:flex;gap:36px;align-items:center}button:hover{background:#15523f}button:disabled{cursor:wait;opacity:.65}button:focus-visible,a:focus-visible{outline:3px solid #88b545;outline-offset:5px}.result-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:31px 34px}.result-label{font-size:11px;color:var(--muted)}.measurement{display:flex;gap:12px;align-items:baseline;margin:8px 0;font-variant-numeric:tabular-nums}.measurement>span:first-child{font-size:66px;font-weight:500;line-height:1.25;letter-spacing:-3px}.unit{font-size:17px;color:var(--muted)}.result-card p{font-size:12px;color:var(--muted);margin:9px 0 0}.result-rule{height:1px;background:var(--line);margin-top:24px}.result-card .fine{font-size:10px;letter-spacing:.3px}.notes-section{padding:85px 0 74px}.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:45px;margin-top:38px}.number{font-size:11px;color:var(--green);font-family:ui-monospace,monospace}h3{font-size:17px;font-weight:600;margin:13px 0 10px}.notes-grid p{font-size:13px;color:var(--muted);line-height:1.9;margin:0}.about-section{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:48px 0;display:grid;grid-template-columns:1fr 1fr;gap:60px}.about-section h2{font-size:24px;margin-bottom:0}.about-section .eyebrow{margin-bottom:16px}.about-section>p{font-size:13px;color:var(--muted);line-height:1.95;margin:0}.footer{display:flex;justify-content:space-between;padding:30px 0 42px;color:var(--muted);font-size:10px;letter-spacing:.4px}.note a{text-decoration:underline}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.masthead{min-height:83px}.brand-detail{display:none}.nav-link{font-size:11px}.hero{padding:56px 0}.hero .lead{font-size:14px}h1{letter-spacing:-1px}.test-section{padding:28px;grid-template-columns:1fr;gap:30px;border-radius:14px}.test-section .eyebrow{font-size:9px;letter-spacing:1.4px}h2{font-size:24px}.result-card{padding:25px}.notes-section{padding:54px 0}.notes-grid{grid-template-columns:1fr;gap:27px}.notes-grid article{border-top:1px solid var(--line);padding-top:19px}.notes-grid h3{margin-top:7px}.about-section{padding:34px 0;grid-template-columns:1fr;gap:20px}.footer{flex-direction:column;gap:8px}.site-label{align-items:flex-start;gap:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}