@font-face{font-family:Geist;src:url('/fonts/geist-98bbbccb.woff2') format('woff2');font-display:swap}
.guide-extra{margin:24px 0;padding:16px 20px;border:1px solid #d7ddce;border-radius:10px;background:#fbfcf5}.guide-extra summary{cursor:pointer;min-height:28px;font-weight:600}.guide-extra>p{margin-top:12px}.guide-extra:target{outline:2px solid #799b65}
:root{--bg:#f4f1e9;--paper:#fbfcf5;--ink:#263e32;--muted:#596b55;--green:#31543b;--border:#d7ddce;--soft:#e8edde}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(ellipse at 5% 0%,#e9eddf,transparent 48%),var(--bg);color:var(--ink);font:16px/1.72 Geist,Arial,sans-serif}a{color:inherit;text-underline-offset:4px}a:focus-visible{outline:3px solid #799b65;outline-offset:5px}.article-header{height:88px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 4.3%;gap:24px}.article-brand{display:flex;align-items:center;gap:10px;text-decoration:none;font:28px/1 Georgia,serif;letter-spacing:-.8px}.article-brand>span{width:42px;height:42px;display:grid;place-items:center;border-radius:50%;background:#e3ead8;border:1px solid #b8c7a7}.article-header nav,.article-header nav a{display:flex;align-items:center}.article-header nav{height:100%;gap:26px}.article-header nav a{height:100%;font-size:13px;text-decoration:none;color:#5f705b;border-bottom:2px solid transparent}.article-header nav a[aria-current=page]{border-color:var(--green);color:var(--ink)}main{max-width:980px;margin:auto;padding:38px 28px 72px}.back{display:inline-block;margin-bottom:34px;color:#46633f}.article-hero{max-width:780px}.eyebrow{font-size:11px;font-weight:600;letter-spacing:1.7px;color:#5d7352}.article-hero h1{font:clamp(42px,7vw,67px)/1.02 Georgia,serif;letter-spacing:-2px;margin:13px 0 24px;max-width:820px}.intro{font-size:22px;line-height:1.55;color:#53684f;margin-bottom:20px}.article-hero>p:not(.intro):not(.eyebrow){max-width:760px}.play{display:inline-flex;background:var(--green);color:#fff;padding:13px 19px;border-radius:9px;margin-top:24px;text-decoration:none}.play:hover{background:#294934}.contents{display:flex;align-items:center;gap:18px 24px;flex-wrap:wrap;background:var(--paper);border:1px solid var(--border);border-radius:12px;padding:17px 20px;margin:48px 0}.contents strong{font:18px Georgia,serif;margin-right:5px}.contents a{font-size:13px;color:#46633f}section{scroll-margin-top:20px}h2{font:34px/1.2 Georgia,serif;letter-spacing:-.7px;margin:12px 0 19px}h3{font:21px/1.25 Georgia,serif;margin:7px 0 9px}.stage-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:24px 0 56px}.stage-grid article{background:var(--paper);border:1px solid var(--border);border-radius:11px;padding:18px 16px;min-height:220px}.stage-grid article>span{font-size:11px;font-weight:600;letter-spacing:1px;color:#698057}.stage-grid p{font-size:14px;line-height:1.6;color:var(--muted);margin:0}.article-copy{max-width:760px}.article-copy h2{margin-top:43px}.article-copy p{margin:0 0 17px;color:#3b5141}.sources{padding-left:21px}.sources li{margin:9px 0}.sources a{color:#315a3b}footer{border-top:1px solid var(--border);padding:23px 4.3%;display:flex;justify-content:space-between;gap:20px;color:#556a51;font-size:13px}footer nav{display:flex;gap:22px}
@media(max-width:800px){.article-header{height:72px;padding:0 20px}.article-brand{font-size:22px}.article-header nav a[aria-current=page]{display:none}main{padding:28px 20px 58px}.stage-grid{grid-template-columns:1fr 1fr}.stage-grid article{min-height:0}.article-hero h1{font-size:47px}.intro{font-size:19px}.contents{align-items:flex-start;flex-direction:column;gap:8px}footer{padding-inline:20px}}
@media(max-width:500px){.article-brand{font-size:19px}.article-brand>span{width:34px;height:34px}.article-header nav{gap:10px}.article-header nav a{font-size:12px}.article-hero h1{font-size:39px}.intro{font-size:18px}.stage-grid{grid-template-columns:1fr}.stage-grid article{padding:16px}h2{font-size:30px}footer{flex-direction:column}footer nav{justify-content:space-between}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(max-width:600px){.article-header{height:auto;min-height:88px;flex-wrap:wrap;gap:4px;padding:12px 16px}.article-header .article-brand{font-size:22px;white-space:nowrap}.article-header nav{height:auto;flex-basis:100%;gap:20px;flex-wrap:wrap}.article-header nav a{min-height:44px}.article-brand>span{width:34px;height:34px}footer nav{flex-wrap:wrap;gap:12px 18px}footer nav a{min-height:44px;display:flex;align-items:center}}

.science-glossary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:24px 0 40px}
.science-glossary>div{padding:16px;background:var(--paper);border:1px solid var(--border);border-radius:10px;scroll-margin-top:24px}
.science-glossary dt{font-weight:600;color:var(--green)}.science-glossary dd{margin:6px 0 0;font-size:15px;color:var(--muted)}
.experiment-card{padding:22px;border:1px solid #b8c7a7;border-radius:12px;background:#e8edde;margin:28px 0}
.article-copy .experiment-card h2{margin-top:0}.experiment-card ol{padding-left:22px}.experiment-card li+li{margin-top:10px}
.experiment-card .play{margin:8px 0 16px}.article-copy .experiment-note{font-size:14px;color:var(--muted)}
.experiment-card summary{cursor:pointer;min-height:44px;display:list-item;font-weight:600}
.experiment-card details p{margin-top:10px}.experiment-card h3{margin-top:20px}
@media(max-width:600px){.science-glossary{grid-template-columns:1fr}.experiment-card{padding:16px}.experiment-card .play{max-width:100%;font-size:14px}}

.claim-source{font-size:13px!important;color:var(--muted)}
.stage-grid .claim-source{margin-top:12px;font-size:12px!important}
.timing-table-wrap{overflow-x:auto;margin:20px 0}
.timing-comparison{width:100%;border-collapse:collapse;font-size:14px;background:var(--paper)}
.timing-comparison caption{text-align:left;padding-bottom:12px;color:var(--muted)}
.timing-comparison th,.timing-comparison td{text-align:left;vertical-align:top;padding:12px;border-bottom:1px solid var(--border)}
.timing-comparison thead{background:var(--soft)}
.timing-comparison th[scope=row]{width:20%}
@media(max-width:800px){.article-header nav a[aria-current=page]{display:flex}}
@media(max-width:600px){.timing-comparison{font-size:13px}.timing-comparison th,.timing-comparison td{padding:8px;overflow-wrap:anywhere}}