@font-face{font-family:LabNoteJP;src:url(fonts/LabNoteJP.woff2);font-weight:500;font-display:swap}@font-face{font-family:LabNoteEN;src:url(fonts/LabNoteEN.woff2);font-weight:100 900;font-display:swap}@font-face{font-family:LabNumber;src:url(fonts/LabNumber.woff2);font-weight:100 900;font-display:swap}
:root{color-scheme:light;--paper:#f7f5f0;--ink:#20232a;--gray:#5c6370;--line:#d9d7d2;--blue:#1c64d9}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:500 16px/1.6 LabNoteJP,LabNoteEN,sans-serif}html[lang=en] body{font-family:LabNoteEN,LabNoteJP,sans-serif}button,input,select{font:inherit}button,select{cursor:pointer;min-height:44px;border:1px solid #aaa9a5;border-radius:8px;background:transparent;color:var(--ink);padding:9px 14px}button:hover{background:#eae7df}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--ink);outline-offset:3px}button:disabled{opacity:.5;cursor:default}.primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}.primary:hover{background:#42454c}h1,h2,p{margin:0 0 14px}h1{font-size:20px;line-height:1.35}h2{font-size:21px}a{color:var(--ink);text-underline-offset:4px}header{max-width:1360px;margin:auto;padding:18px 30px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}header span{font-family:LabNumber;color:var(--gray);font-size:14px}.brand{display:flex;gap:14px;align-items:baseline}.brand h1{margin:0}.experiment{max-width:1360px;margin:auto;display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:28px;padding:20px 30px 28px}.visual{min-width:0;align-self:start;position:sticky;top:12px}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:0 0 8px}.tabs button{border:0;border-radius:0;padding:8px 15px;flex:1}.tabs [aria-selected=true]{border-bottom:3px solid var(--ink)}#stage{height:min(64vh,570px);min-height:300px;width:100%;position:relative}#stage svg{display:block}#detail{height:165px;border-top:1px solid var(--line);margin:6px 0}#detail[hidden]{display:none}.question{font-size:19px;line-height:1.6;margin:12px 0 16px}.controls .primary{width:100%;font-size:18px}.controls{padding-top:48px;min-width:0}.slider{margin:24px 0}.slider label,.slider .label{display:block;margin-bottom:6px}.slider output{float:right;font-family:LabNumber,LabNoteJP,LabNoteEN;font-variant-numeric:tabular-nums}.track{display:flex;align-items:center;gap:10px}.track button{padding:4px;min-width:44px;font-size:23px}.track input{min-width:0;width:100%;height:44px;accent-color:var(--ink);cursor:pointer}.ticks{font-size:16px;color:var(--gray);display:flex;justify-content:space-between;gap:6px;line-height:1.4;margin:4px 48px 0}.brightness-marks{position:relative;height:62px;margin:0 48px;font-size:16px;line-height:1.3;color:var(--gray)}.brightness-marks span{position:absolute;transform:translateX(-50%);white-space:nowrap;border-top:1px solid #8b8a86;padding-top:5px}.brightness-marks span:nth-child(2){top:28px}.toggle{display:flex;gap:10px;align-items:center;min-height:44px}.toggle input{width:22px;height:22px;accent-color:var(--ink)}select{max-width:100%;width:100%}.row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.hint,.note{color:var(--gray)}.hint{padding:12px 0 0;margin:0;font-size:16px}.about{max-width:1000px;padding:28px 30px;margin:auto;border-top:1px solid var(--line)}.about>p{max-width:760px}.about details{border-top:1px solid var(--line);padding:16px 0}.about summary{cursor:pointer;min-height:44px}.about ol,.about ul{padding-left:22px}footer{font-size:16px;color:var(--gray);padding:15px 30px 30px;max-width:1000px;margin:auto}.toast{padding:12px 16px;border:1px solid var(--ink);border-radius:6px;margin:12px 0}.sharebox{overflow-wrap:anywhere;margin-top:15px}.sharebox input{width:100%;padding:12px;border:1px solid var(--gray);background:white;color:var(--ink);border-radius:5px}.prepare,.results,.notebook{max-width:850px;margin:30px auto;padding:0 24px}.prepare p{margin-bottom:18px}.measure{height:100svh;max-width:900px;margin:auto;display:flex;flex-direction:column;padding:12px 16px;gap:6px}.measure-head{display:flex;justify-content:space-between;align-items:center;height:44px;flex:none}.progress{font-size:20px;font-family:LabNumber,LabNoteJP,LabNoteEN}.first-note{line-height:1.4;min-height:45px;flex:none;margin:4px 0;font-size:16px}.measure-stage{width:100%;flex:none;max-width:760px;margin:0 auto}.adjust{display:grid;grid-template-columns:70px minmax(0,1fr) 70px;gap:10px;align-items:center}.adjust input{width:100%;height:44px;accent-color:var(--ink);min-width:0}.adjust button{line-height:1.1;padding:5px;font-size:21px;min-height:48px}.adjust small{display:block;font-size:14px}.decide{width:100%;min-height:48px;font-size:18px}.measure .decide{margin-top:6px}.results svg,.record svg{width:100%;height:auto;display:block}.legend{display:flex;gap:15px;flex-wrap:wrap;color:var(--gray);font-size:16px}.legend i{display:inline-block;background:#e8590c;width:10px;height:10px;border-radius:50%}.legend b{display:inline-block;border-left:3px solid #e8590c;height:14px;vertical-align:middle}.record{padding:20px 0;border-top:1px solid var(--line)}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--line);font-weight:500}.blue{color:var(--blue)}.first-step{border-left:2px solid var(--gray);padding-left:12px;margin:15px 0}.muted{color:var(--gray)}
@media(max-width:599px){header{padding:8px 16px;min-height:44px;border:0}h1{font-size:16px}.brand{gap:6px}.brand span{display:none}header button{font-size:14px;padding:5px 10px;min-height:36px}.experiment{display:block;padding:0}.visual{top:0;z-index:2;background:var(--paper);padding:0 16px;border-bottom:1px solid var(--line)}.tabs{height:48px;margin:0}.tabs button{font-size:16px;padding:6px 4px}#stage{height:55svh;min-height:0;max-height:none}.controls{padding:0 16px 24px}.question{font-size:16px;line-height:1.5;margin:10px 0}.controls .primary{min-height:44px;font-size:17px}#detail{height:150px}.slider{margin:20px 0}.about{padding:24px 16px}.prepare,.results,.notebook{margin:20px auto;padding:0 16px}.measure{padding:8px 16px;gap:5px}.first-note{min-height:0;margin:2px 0 4px}.measure-head{height:44px}.measure-stage{margin:0 auto}.results h1{font-size:21px}h2{font-size:19px}.measure .decide{margin-top:4px}.adjust{gap:6px;grid-template-columns:64px minmax(0,1fr) 64px}footer{padding:16px}th,td{padding:8px 5px;font-size:16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:599px){header{height:44px;padding:0 16px;gap:8px}.brand h1{font-size:14px;line-height:1.2}.question{margin:8px 0}.controls .primary{padding:8px 12px;line-height:1.5}}
.result-graph{margin:22px 0 30px}.result-graph>p{font-size:16px;margin:0 0 8px;text-align:center}.graph-row{display:grid;align-items:center;min-height:80px;border-top:1px solid var(--line)}.graph-label{font-size:16px;line-height:1.4;padding-right:10px}.plot{min-width:0}.plot svg{width:100%;height:80px;display:block}.graph-axis{height:32px;position:relative;font:500 16px/2 LabNumber,LabNoteJP,LabNoteEN}.graph-axis span{position:absolute;transform:translateX(-50%)}
header button{white-space:nowrap;flex-shrink:0}

:root{--number-font:LabNumber}
#detail{height:auto;min-height:0;padding:8px 0 14px}.zoom-label{font-size:16px;line-height:1.5;color:#5c6370;text-align:center;margin:0 0 8px}