:root{color-scheme:dark;--bg:#111513;--panel:#181e1a;--line:#303830;--text:#eff2e9;--muted:#a4afa3;--accent:#d5f77f;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-size:14px;line-height:1.7}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,select{cursor:pointer}button{color:var(--text);border:1px solid var(--line);background:transparent;border-radius:7px;padding:9px 15px}button:hover{background:#2b352c}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}.masthead,main,footer{max-width:1240px;margin:auto}.masthead{height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-size:25px;font-weight:700;letter-spacing:-1px}.brand-icon{background:var(--accent);color:var(--bg);border-radius:9px;width:36px;height:36px;font-size:27px;line-height:32px;text-align:center}.brand-icon span{font-size:16px}.brand-sub{font-size:10px;letter-spacing:1.8px;font-weight:500;color:var(--muted);margin-left:10px}.masthead>a:last-child{font-size:13px;color:var(--muted)}.intro{padding:55px 0 34px;display:flex;justify-content:space-between;align-items:center}.eyebrow{color:var(--accent);font-size:11px;letter-spacing:2px;margin:0 0 14px}h1{font-size:clamp(24px,3.2vw,39px);line-height:1.55;letter-spacing:.01em;font-weight:600;margin:0 0 18px}.lead{color:var(--muted);margin:0;font-size:14px}.mobile-break{display:none}.intro-mark{display:flex;gap:14px;align-items:center;padding-right:65px;transform:skew(-15deg)}.intro-mark i{height:110px;width:11px;background:var(--accent)}.intro-mark i:nth-child(1){opacity:.1}.intro-mark i:nth-child(2){opacity:.25}.intro-mark i:nth-child(3){opacity:.45}.intro-mark i:nth-child(4){opacity:.7}.meter{display:flex;align-items:center;gap:42px;border:1px solid #3c4932;border-radius:12px;background:linear-gradient(110deg,#20291c,var(--panel));padding:21px 27px}.primary-reading{flex:1}.primary-reading p{margin:0;font-size:12px;color:#c5cebf}.primary-reading>div{display:flex;align-items:baseline;gap:12px}#hz{font-size:64px;font-weight:500;line-height:1.2;letter-spacing:-3px;font-variant-numeric:tabular-nums;color:var(--accent)}.unit{font-size:22px;color:var(--accent)}.status{color:var(--accent);font-size:11px;background:#303d23;border-radius:30px;padding:3px 9px;letter-spacing:.02em}.status.warning{color:#f6ca82;background:#423724}.reading{border-left:1px solid var(--line);padding-left:32px}.reading>span{color:var(--muted);font-size:11px}.reading p{margin:5px 0 0;color:var(--muted);font-size:12px}.reading strong{font-size:26px;font-weight:500;color:var(--text);font-variant-numeric:tabular-nums}.quiet{font-size:12px;white-space:nowrap;color:#c6d0c2}.measurement-note{font-size:11px;color:var(--muted);margin:10px 2px 28px;min-height:19px}.experiment{background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:20px 22px 0;gap:12px}.mode{display:flex;background:var(--bg);padding:4px;border:1px solid var(--line);border-radius:8px}.mode button{border:0;padding:8px 18px;color:var(--muted);font-size:12px}.mode button[aria-pressed=true]{background:var(--accent);color:#1c2711;font-weight:600}.view-actions{display:flex;gap:8px}.mode-description{font-size:11px;color:var(--muted);padding:14px 24px 18px}.track{--lane:#d5f77f;display:flex;border-top:1px solid var(--line);height:141px}.track[data-lane="1"]{--lane:#8ecbd4}.track[data-lane="2"]{--lane:#d9b0ed}.track-info{width:201px;flex-shrink:0;padding:17px 23px;background:#1b221d;z-index:1}.track-title{display:flex;align-items:center;gap:7px;font-size:11px;color:#d8dfd2}.dot{width:6px;height:6px;display:inline-block;background:var(--lane);border-radius:50%}.tag{font-size:10px;color:var(--muted);margin-left:auto;background:#2a332b;padding:0 5px;border-radius:3px}.track-rate{display:flex;align-items:baseline;gap:6px;color:var(--muted)}.track-rate strong{font-size:33px;font-weight:500;color:var(--lane);line-height:1.6;font-variant-numeric:tabular-nums}.track-rate>span{font-size:11px}.track-rate input{width:104px;min-width:0;font-size:26px;background:#101711;color:var(--lane);border:1px solid #64715d;border-radius:5px;height:43px;margin:5px 0;padding:2px 7px}.actual{color:var(--muted);font-size:10px;font-variant-numeric:tabular-nums}canvas{width:calc(100% - 201px);height:140px;background-color:#101512;background-image:linear-gradient(#22302555 1px,transparent 1px),linear-gradient(90deg,#22302555 1px,transparent 1px);background-size:32px 32px}.rate-note{padding:12px 23px;margin:0;border-top:1px solid var(--line);font-size:11px;color:var(--muted);min-height:44px}.rate-note.warning{color:#f6ca82}.settings{display:grid;grid-template-columns:2fr 1fr 1fr;gap:35px;padding:19px 23px 23px;border-top:1px solid var(--line)}.settings label{font-size:11px;color:#c7d0c2}.settings output{color:var(--text);margin-left:12px;font-variant-numeric:tabular-nums}.subtle{color:var(--muted);font-size:10px;margin-left:4px}input[type=range]{width:100%;display:block;margin:15px 0 0;accent-color:var(--accent);height:8px;cursor:pointer}select{display:block;width:100%;margin-top:7px;border:1px solid #414c40;color:var(--text);background:#1d271f;padding:7px 10px;border-radius:5px;font-size:12px}.guide{display:grid;grid-template-columns:1fr 1.5fr;gap:60px;padding:66px 0;border-bottom:1px solid var(--line)}.guide h2{font-size:25px;font-weight:500;line-height:1.6;margin:0}.guide article{display:flex;gap:20px;margin-bottom:26px}.guide article:last-child{margin:0}.step{font-family:monospace;color:var(--accent);font-size:12px;padding-top:4px}h3{font-size:14px;font-weight:600;margin:0 0 6px}.guide p:not(.eyebrow){font-size:12px;color:var(--muted);margin:0;line-height:1.9}.faq{max-width:850px;margin:47px auto 60px}.faq h2{font-size:19px;font-weight:500;margin:0 0 23px}details{border-bottom:1px solid var(--line);padding:15px 0}summary{cursor:pointer;font-size:13px}details p{font-size:12px;color:var(--muted);line-height:1.9;padding:0 17px;margin:13px 0 3px}.source{font-size:11px;color:var(--muted);margin-top:24px}.source a{text-decoration:underline}footer{border-top:1px solid var(--line);padding:23px 0 35px;display:flex;align-items:center;gap:25px;color:var(--muted);font-size:11px}footer .brand{font-size:19px;color:var(--text)}footer nav{margin-left:auto;display:flex;gap:20px}footer small{font-size:10px}.experiment:fullscreen{display:flex;flex-direction:column;justify-content:center;padding:2vh 0;background:var(--bg);border:0;border-radius:0}.experiment:fullscreen .track{height:20vh}.experiment:fullscreen canvas{height:100%}[hidden]{display:none!important}@media(max-width:1320px){.masthead,main,footer{margin-left:5%;margin-right:5%}.meter{gap:22px}.intro-mark{padding-right:30px}}@media(max-width:800px){.masthead{height:72px}.brand-sub{display:none}.intro{padding:34px 0 25px}.intro-mark{display:none}.meter{gap:20px;flex-wrap:wrap;padding:19px 20px}.primary-reading{flex-basis:100%}#hz{font-size:58px}.reading{padding-left:0;border:0;flex:1}.reading strong{font-size:22px}.meter .quiet{padding:8px}.track-info{width:166px;padding:17px}.track canvas{width:calc(100% - 166px)}.toolbar{padding:16px 14px 0;flex-wrap:wrap}.mode button{padding:8px 12px}.view-actions{margin-left:auto}.mode-description{padding:14px 17px}.settings{gap:16px}.guide{gap:30px;grid-template-columns:1fr;padding:42px 0}.guide h2{font-size:22px}.guide h2 br{display:none}footer{flex-wrap:wrap;gap:14px}footer nav{margin-left:auto}footer small{width:100%}.measurement-note{margin-bottom:20px}}@media(max-width:480px){.masthead,main,footer{margin-left:4%;margin-right:4%}.lead{font-size:12px}.mobile-break{display:block}h1{font-size:25px}.mode{width:100%}.mode button{flex:1}.view-actions{width:100%;justify-content:flex-end}.track-info{width:137px;padding:19px 12px}.track canvas{width:calc(100% - 137px)}.track-title{font-size:10px;gap:5px}.track-rate strong{font-size:30px}.track-rate input{width:87px;font-size:24px}.settings{grid-template-columns:1fr 1fr;padding:17px}.settings label:first-child{grid-column:1/-1;padding-bottom:5px}.rate-note{padding:12px 17px}.meter{gap:13px}.reading>span{font-size:10px}.meter .quiet{padding:7px;font-size:11px}.actual{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.header-actions{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:12px}.language-label{display:flex;align-items:center;gap:8px;font-size:11px}.language-label select{margin:0;width:auto;padding:5px 8px}.track{height:110px}.track canvas{height:109px}.track-info{padding-top:10px;padding-bottom:10px}.track-rate strong{font-size:30px;line-height:1.4}.track-rate input{height:36px;margin:3px 0;font-size:25px}.experiment:fullscreen{justify-content:flex-start;overflow:auto}.experiment:fullscreen .track{height:110px}.experiment:fullscreen canvas{height:109px}.experiment:fullscreen #tracks{flex-shrink:0}html[lang=en] .track-info{width:215px}html[lang=en] .track canvas{width:calc(100% - 215px)}@media(max-width:800px){.header-actions{gap:12px}.language-label{font-size:0}.language-label select{font-size:11px}html[lang=en] .track-info{width:170px}html[lang=en] .track canvas{width:calc(100% - 170px)}}@media(max-width:480px){.header-actions>a{display:none}.mode button{padding:8px 6px;font-size:11px}html[lang=en] .track-info{width:142px}html[lang=en] .track canvas{width:calc(100% - 142px)}html[lang=en] .track-title{font-size:9px}html[lang=en] .tag{font-size:8px}.intro{padding-top:28px}h1{font-size:24px}}

@media(max-width:480px){.masthead .brand{font-size:21px;letter-spacing:-.8px}.header-actions{gap:8px}.language-label select{max-width:125px}}