:root{--bg:#fafaf8;--ink:#141c45;--muted:#626673;--line:#e5e6eb;--blue:#2b3fb8;--tint:#eef0fa}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Geist,system-ui,sans-serif;line-height:1.6}a{color:inherit;text-underline-offset:4px}button,input,summary{font:inherit}button,input,summary,a{outline-offset:5px}body>nav,main,body>footer{max-width:1080px;margin:auto;padding:0 32px}body>nav{display:flex;justify-content:space-between;align-items:center;height:100px;font-size:14px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:'Instrument Serif',Georgia,serif;font-size:27px}.brand img{width:32px;height:32px}header{padding:62px 0 48px;max-width:820px}.eyebrow,.num{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:600;color:var(--blue)}h1,h2{font-family:'Instrument Serif',Georgia,serif;font-weight:400;letter-spacing:-.02em;line-height:1.05;color:#141c45}.limits h2{color:#fff}h1{font-size:clamp(48px,7vw,78px);margin:18px 0 24px}h2{font-size:clamp(34px,4vw,48px);margin:12px 0 20px}h3{font-size:17px;margin:0 0 8px}p{margin:0 0 16px}.lead{font-size:20px;max-width:680px;color:var(--muted)}.flow{display:grid;grid-template-columns:1fr 30px 1fr 30px 1fr;align-items:center;gap:12px;margin-bottom:72px}.card{background:white;border:1px solid var(--line);border-radius:20px;padding:24px}.flow .card{min-height:160px}.flow small{display:block;color:var(--muted);margin-top:12px}.arrow{text-align:center;color:var(--blue);font-size:24px}.glyph{width:35px;height:35px;color:var(--blue);margin-bottom:14px}.section{padding:55px 0;border-top:1px solid var(--line)}.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px}.muted{color:var(--muted)}.pill{display:inline-block;background:var(--tint);color:var(--blue);border-radius:30px;padding:6px 12px;font-size:12px;font-weight:500}.rule{padding:20px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:155px 1fr;gap:20px}.rule:last-child{border:0}.rule p{margin:0;font-size:14px;color:var(--muted)}.timeline{position:relative;margin:32px 0 20px;height:95px;background:linear-gradient(to right,#f3f3f6 72%,#eef0fa 72%);border-radius:12px}.timeline:before{content:'';position:absolute;left:6%;right:6%;top:48px;height:2px;background:#c8cbd8}.marker{position:absolute;top:24px;text-align:center;transform:translateX(-50%);font-size:12px}.marker b{display:block;width:12px;height:12px;background:var(--blue);border-radius:50%;margin:10px auto}.marker span{white-space:nowrap}.sleep{left:94%}.dinner{left:55%}.time-control{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:20px;font-size:14px}.time-control input{width:65%;accent-color:var(--blue)}output{font-variant-numeric:tabular-nums}.note{font-size:12px;color:var(--muted);margin-top:18px}.checks{display:grid;gap:12px}.check{display:flex;gap:14px;border-bottom:1px solid var(--line);padding:15px 0}.check b{color:var(--blue);font-size:18px}.check p{font-size:14px;margin:3px 0 0;color:var(--muted)}.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0}.tabs button{border:1px solid var(--line);border-radius:24px;background:white;color:var(--muted);padding:8px 16px;cursor:pointer;font-size:13px}.tabs button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.plot-group{margin:24px 0}.plot-label{display:flex;justify-content:space-between;font-size:13px;gap:10px}.track{height:68px;position:relative;margin:8px 10px;background:repeating-linear-gradient(to right,transparent 0,transparent calc(25% - 1px),var(--line) calc(25% - 1px),var(--line) 25%);border-bottom:1px solid var(--line)}.dot{position:absolute;width:10px;height:10px;border-radius:50%;background:var(--blue);left:var(--x);top:var(--y);transform:translate(-50%,-50%)}.track.other .dot{background:#898e9f}.median{position:absolute;left:var(--x);height:58px;top:5px;width:2px;background:var(--ink)}.axis{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin:0 10px}.result{background:var(--tint);padding:18px;border-radius:12px;margin-top:24px}.result strong{display:block;font-size:22px}.result p{font-size:13px;margin:5px 0 0}.legend{display:flex;gap:20px;font-size:12px;color:var(--muted)}.strengths{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:30px}.strengths .card{padding:22px 18px}.strengths p{font-size:13px;color:var(--muted);margin:8px 0 0}.math{margin-top:30px;border-top:1px solid var(--line);padding:22px 0}.math summary{cursor:pointer;font-weight:500}.math .content{padding-top:22px;font-size:14px;max-width:820px}.math code{display:block;white-space:normal;padding:16px;background:var(--tint);border-radius:10px;font-size:12px;margin:12px 0}.limits{background:var(--ink);color:white;border-radius:24px;padding:38px;margin:30px 0 50px}.limits p{color:#d0d3df;max-width:760px}.limits h2{margin-top:0}.limits ul{padding-left:20px;color:#d0d3df}.limits li{margin:12px 0}body>footer{border-top:1px solid var(--line);padding-top:24px;padding-bottom:40px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}@media(max-width:700px){body>nav,main,body>footer{padding-left:22px;padding-right:22px}body>nav{height:80px}header{padding-top:35px}.split{grid-template-columns:1fr;gap:25px}.flow{grid-template-columns:1fr;margin-bottom:40px}.flow .card{min-height:0}.arrow{transform:rotate(90deg)}.strengths{grid-template-columns:1fr 1fr}.rule{grid-template-columns:125px 1fr;gap:12px}.section{padding:40px 0}.card{padding:22px}.limits{padding:26px}.lead{font-size:18px}body>footer{flex-direction:column}.time-control input{width:55%}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* Page nav extras and the closing waitlist block (S10, CONV-12). */
.hiw-nav-links{display:flex;align-items:center;gap:20px}.hiw-nav-links .hiw-join{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border-radius:999px;background:#141c45;color:#fff;text-decoration:none;font-weight:500}@media(max-width:560px){.hiw-nav-links{gap:12px}.hiw-nav-links .hiw-hide-sm{display:none}}@media(max-width:420px){.hiw-nav-links .hiw-pricing{display:none}body>nav{padding:0 16px}}
.hiw-closing{max-width:1080px;margin:0 auto;padding:0 32px}.hiw-closing>.le.de-site-closing--compact{margin-bottom:0}.hiw-closing+.de-site-footer>.le-foot{margin-top:32px}@media(max-width:700px){.hiw-closing{padding:0 22px}}