@font-face{font-family:PlexJP;src:url(fonts/PlexJP.ttf);font-weight:500}@font-face{font-family:Plex;src:url(fonts/Plex.ttf);font-weight:100 900}@font-face{font-family:Inter;src:url(fonts/Inter.ttf);font-weight:100 900}
:root{--paper:#F7F5F0;--ink:#20232A;--blue:#1C64D9;--gray:#5C6370;--orange:#E8590C}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:500 16px/1.7 PlexJP,Plex,sans-serif}html[lang=en] body{font-family:Plex,PlexJP,sans-serif}button,input,textarea{font:inherit}button{min-height:46px;border:1px solid #c8c7c2;border-radius:8px;padding:10px 14px;background:transparent;color:var(--ink);cursor:pointer;line-height:1.4}button:hover{background:#eeece6}button.primary{background:var(--ink);color:white;border-color:var(--ink)}button:disabled{opacity:.5;cursor:default}:focus-visible{outline:3px solid var(--blue);outline-offset:3px}a{color:var(--ink);overflow-wrap:anywhere}header{max-width:1160px;margin:auto;padding:15px 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dedbd3;gap:12px}.brand{color:var(--blue);font-size:20px;text-decoration:none}.brand span{font:16px Inter}main{max-width:1160px;margin:auto;padding:0 24px 40px}.heading{padding:25px 0 8px}h1{font-size:30px;line-height:1.4;margin:4px 0}h2{font-size:22px;line-height:1.6}.eyebrow{font:12px Inter;color:var(--gray);letter-spacing:.14em}nav{display:flex;gap:8px;padding:16px 0}nav button{border:0;border-bottom:3px solid transparent;border-radius:0;min-width:80px}nav button[aria-selected=true]{border-color:var(--ink)}#question{font-size:22px;margin:12px 0;text-align:center}.experiment{display:grid;grid-template-columns:minmax(0,1fr) 300px;column-gap:24px;align-items:start}#question{grid-column:1/-1}.diagram{grid-column:1;min-width:0}.controls{grid-column:2;grid-row:2;padding-top:14px;min-width:0}#stage{width:100%;line-height:0}#stage > svg{display:block;width:100%;height:auto}#evidence{color:var(--blue);text-align:center;font-family:Inter,PlexJP,sans-serif;padding:8px 0 12px}#evidence p{font-family:PlexJP,Plex,sans-serif;font-size:15px;margin:0 0 6px}.values-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px;font-size:16px}.values-row strong{font-size:24px}.row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.primary{width:100%}.slider{margin:20px 0}.slider label{display:block;margin-bottom:8px}.track{display:flex;gap:8px;align-items:center}.track input{width:100%;min-width:0;accent-color:var(--ink);height:44px}.track button{flex-shrink:0;padding:6px;width:40px;min-height:44px;font-family:Inter}.warn,#intro,.explain{color:var(--gray);font-size:14px}.explain,#intro{grid-column:1/-1;margin:16px 0;max-width:800px}#intro{font-size:14px;margin-top:0}.tag{font-size:14px;color:var(--blue)}.link-result{width:100%;padding:10px;border:1px solid #ccc;border-radius:6px}.note-form{border:1px solid #d8d5cd;border-radius:12px;background:white;padding:20px;margin:20px 0}.note-form textarea{display:block;width:100%;min-height:90px;padding:10px;border:1px solid #ccc;border-radius:8px;margin:8px 0}.choice-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.choice-row button{flex:1;min-width:100px}.choice-row button[aria-pressed=true]{background:var(--ink);color:white}#notebook,#sources,footer{border-top:1px solid #d8d5cd;margin-top:26px;padding-top:18px}.record{background:#fff;border:1px solid #d8d5cd;border-radius:10px;padding:16px;margin:14px 0}.record .meta{font-size:14px;color:var(--gray)}.word{display:inline-block;width:9px;height:9px;background:var(--orange);border-radius:50%;margin-right:8px}summary{min-height:44px;cursor:pointer}#sourceText,footer{font-size:14px;color:var(--gray)}.sourceLinks a{display:block;margin:12px 0}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media(max-width:760px){header{padding:12px 16px}main{padding:0 16px 32px}.heading{padding:18px 0 4px}h1{font-size:25px}h2,#question{font-size:19px}nav{padding:10px 0}nav button{flex:1;min-width:0;font-size:15px;padding:9px}.experiment{display:block}.controls{padding-top:0}#stage{width:calc(100% + 32px);margin-left:-16px}.values-row{flex-direction:column;gap:2px;font-size:17px}.values-row strong{line-height:1}.row{margin:10px 0}.row>button{flex:1}.row>button.primary{flex-basis:100%}#question{margin:12px 0 0}.warn,#intro,.explain{font-size:14px}.note-form{padding:14px}.choice-row button{min-width:70px;padding:10px 7px;font-size:15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.judgement{color:var(--orange)}