:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:#082847;background:#fff;--navy:#082847;--navy2:#173a59;--green:#3f7d32;--greenp:#eaf2e6;--coral:#ef654d;--coralp:#ffd3c7;--paper:#fffaf7;--muted:#4b6075;--line:#dce4e8;--shell:min(1040px,calc(100% - 48px))}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px}a{color:inherit}a:focus-visible{outline:3px solid var(--coral);outline-offset:4px}p,li,td,th{line-height:1.65}h1,h2,h3{margin-top:0;text-wrap:balance}.shell{width:var(--shell);margin-inline:auto}.skip{position:fixed;top:12px;left:12px;padding:10px 14px;color:#fff;background:var(--navy);transform:translateY(-160%)}.skip:focus{transform:none}
    header{border-bottom:1px solid var(--line)}.head{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:24px}.head nav,.foot div{display:flex;flex-wrap:wrap;gap:22px}.brand{font-weight:800;text-decoration:none}.back{color:var(--green);font-weight:700;text-underline-offset:4px}
    .hero{padding:clamp(72px,10vw,120px) 0;color:#fff;background:var(--navy)}.hero-grid,.grid,.quick-grid,.session-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:clamp(42px,8vw,96px)}h1{margin-bottom:22px;font-size:clamp(3.2rem,7vw,6.2rem);line-height:.96;letter-spacing:-.065em}.lede{color:rgb(255 255 255/76%);font-size:1.14rem}.analogy{margin:0;padding-top:24px;border-top:1px solid rgb(255 255 255/24%);font:clamp(1.55rem,3vw,2.35rem)/1.34 Georgia,serif}
    .quick{padding:42px 0;border-bottom:1px solid var(--line);background:var(--paper)}.quick h2{font-size:1.9rem}.quick p{margin:0;color:var(--navy2);font-size:1.08rem}
    section.content{padding:clamp(68px,9vw,104px) 0;scroll-margin-top:20px}section.content+section.content{border-top:1px solid var(--line)}.label h2{font-size:clamp(2rem,4vw,3.25rem);line-height:1.04;letter-spacing:-.05em}.label p{color:var(--muted)}.prose{max-width:760px}.prose h3{margin:38px 0 10px;font-size:1.35rem}.prose h3:first-child{margin-top:0}.prose p,.prose li{color:var(--navy2)}code{padding:.1em .35em;border-radius:4px;background:var(--greenp)}
    .equation{margin:28px 0;padding:28px;border:1px solid #cbdac5;background:var(--greenp)}.equation code{display:block;padding:0;background:transparent;font-size:clamp(2.2rem,6vw,4.2rem);font-weight:800}.keys{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.keys p{margin:18px 0 0;padding-top:10px;border-top:1px solid #9ab292;font-size:.92rem}.keys strong{display:block;color:var(--navy)}
    .steps{padding-left:22px}.steps li{margin-bottom:12px}.table-wrap{overflow-x:auto}.compare{width:100%;margin-top:24px;border-collapse:collapse;font-size:.95rem}.compare th,.compare td{padding:14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}.compare th{background:var(--paper)}.compare td:first-child{font-weight:800;color:var(--navy)}
    .callout{margin:28px 0;padding:22px 24px;border-left:5px solid var(--coral);background:#fff0eb}.callout p:last-child{margin-bottom:0}.lora{margin-top:26px;padding:28px;color:#fff;background:var(--navy)}.lora p,.lora li{color:rgb(255 255 255/78%)}.lora code{display:block;margin:20px 0;padding:16px;color:var(--coralp);background:rgb(255 255 255/7%)}.myths{padding:0;list-style:none}.myths li{margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--line)}.myths strong{display:block;color:var(--navy)}
    .session{padding:clamp(58px,8vw,84px) 0;background:var(--coralp)}.session h2{font-size:clamp(2.2rem,4vw,3.5rem);letter-spacing:-.05em}.sources a{color:var(--green);font-weight:750;text-underline-offset:4px}footer{padding:42px 0;color:#fff;background:var(--navy)}.foot{display:flex;justify-content:space-between;gap:28px}.foot p{margin:0;color:rgb(255 255 255/72%)}.foot a{font-weight:700}
    @media(max-width:760px){:root{--shell:min(100% - 32px,680px)}.head,.foot{align-items:flex-start;flex-direction:column;padding:16px 0}.hero-grid,.grid,.quick-grid,.session-grid{grid-template-columns:1fr}.keys{grid-template-columns:1fr 1fr}h1{font-size:clamp(3rem,15vw,4.6rem)}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}