:root{--paper:#f4f6f3;--white:#fff;--ink:#142a2c;--ink-2:#1b3739;--teal:#08756f;--teal-dark:#075d58;--mint:#a7e8d4;--mint-soft:#eaf7f1;--violet:#6459df;--orange:#ff6848;--amber:#e9ad4c;--text:#273e3a;--muted:#5a6d68;--line:#d4ded9;--line-dark:#bdcdc6;--shadow:0 20px 55px rgba(24,55,47,.09)}
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.site-header{height:74px;border-bottom:1px solid var(--line);background:rgba(244,246,243,.9);backdrop-filter:blur(12px);position:relative;z-index:5}.header-inner{height:100%;display:flex;align-items:center;gap:42px}.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-size:22px;font-weight:800;letter-spacing:-.055em;white-space:nowrap}.brand-mark{display:grid;grid-template-columns:8px 8px;gap:3px}.brand-mark i{width:8px;height:8px;border-radius:3px;background:var(--orange)}.brand-mark i:nth-child(2){background:#16b7a6}.brand-mark i:nth-child(3){background:#5759ee}.brand-mark i:nth-child(4){background:#a44eea}.site-nav{display:flex;gap:28px}.site-nav a{text-decoration:none;font-size:13px;font-weight:700}.site-nav a:hover{color:var(--teal)}.edition{margin-left:auto;color:#5f716d;font-size:11px;font-weight:800;letter-spacing:.14em}
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.explanation{display:grid;grid-template-columns:.82fr 1.18fr;gap:70px;padding:15px 0 77px}.section-intro h2,.guide-head h2,.method h2,.faq h2{font-size:clamp(2.15rem,4vw,3.7rem);margin:15px 0 18px}.section-intro>p:last-child{color:#526762;max-width:480px}.comparison-cards{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line-dark);border-radius:13px;overflow:hidden;background:#fff}.comparison-cards article{padding:25px}.comparison-cards article+article{border-left:1px solid var(--line)}.comparison-cards article>span,.movement-cards article>span{font-size:9px;letter-spacing:.14em;font-weight:800;color:var(--teal)}.comparison-cards h3{font-size:25px;margin:11px 0}.comparison-cards p{font-size:13px;color:#536862;line-height:1.65}.comparison-cards button{border:0;background:transparent;color:var(--teal);font-size:12px;font-weight:800;padding:18px 0 0;text-decoration:underline;text-underline-offset:4px}.movement-guide{padding:70px 0;background:var(--ink);color:#f5faf6}.guide-head{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:end;margin-bottom:36px}.guide-head .eyebrow{color:var(--mint)}.guide-head>p{color:#c4d6d1;max-width:480px}.movement-cards{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #3a5555;border-left:1px solid #3a5555}.movement-cards article{min-height:175px;padding:20px;border-right:1px solid #3a5555;border-bottom:1px solid #3a5555}.movement-cards article>span{color:#92c8b9}.movement-cards h3{font-size:22px;margin:11px 0}.movement-cards p{color:#bdcfca;font-size:12px;line-height:1.6}.method{display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;padding:78px 0}.method ol{list-style:none;padding:0;margin:0}.method li{display:grid;grid-template-columns:38px 1fr;gap:14px;padding:17px 0;border-bottom:1px solid var(--line)}.method li>span{width:29px;height:29px;border-radius:50%;display:grid;place-items:center;background:var(--mint-soft);color:var(--teal);font-size:11px;font-weight:800}.method strong{font-size:15px}.method li p{font-size:13px;color:#5a6d68;margin-top:2px}.faq{display:grid;grid-template-columns:.7fr 1.3fr;gap:80px;border-top:1px solid var(--line-dark);padding:69px 0 80px}.faq-list details{border-bottom:1px solid var(--line-dark)}.faq-list summary{padding:18px 34px 18px 0;font-size:15px;font-weight:750;position:relative;cursor:pointer}.faq-list summary:after{content:"+";position:absolute;right:5px;color:var(--teal);font-size:22px;top:12px}.faq-list details[open] summary:after{content:"−"}.faq-list details p{padding:0 35px 20px 0;color:#526762;font-size:13px;line-height:1.7}.site-footer{border-top:1px solid var(--line);padding:29px 0 38px}.footer-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:30px}.footer-inner>p{color:#657771;font-size:12px}.footer-inner>div{display:flex;gap:18px}.footer-inner>div a{font-size:11px;color:var(--teal);font-weight:700}.noscript{position:fixed;left:20px;right:20px;bottom:20px;padding:14px;background:#fff3cf;border:1px solid #d8b861;z-index:20}
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@media(max-width:390px){.hero h1{font-size:42px}.move-button{padding-inline:7px}.movement-cards{grid-template-columns:1fr}.movement-cards article{min-height:0}.prompt-actions{grid-template-columns:1fr}.compact-controls{grid-template-columns:1fr}}
@media(max-width:620px){.quiet-button,.reverse-button,.guide-toggle,.segmented button,.play-button,.primary-button,.secondary-button,.comparison-cards button{min-height:44px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media(prefers-contrast:more){:root{--line:#879792;--line-dark:#6d8079}.move-button,.comparison-cards,.lab-shell{border-width:2px}}