/* Shared editorial system for the question map, research library and light explainer. */
.explore{--forest:#142b30;--lime:#d6f657;--coral:#ff946f;--lavender:#c6b4f0;--page:#101a1d;--panel:#18272a;--soft:#233631;--copy:#ecf2ed;--sub:#b7c9bd;--line:#43594f;--link:#cce89e;--maxw:1240px;background:var(--page);color:var(--copy);font-size:18px;line-height:1.65;color-scheme:dark}
[data-theme=light] .explore{--page:#f7f8f3;--panel:#fff;--soft:#eaf0e4;--copy:#142b30;--sub:#4a6256;--line:#b6c9b7;--link:#28654b;color-scheme:light}
.explore .wrap{padding-inline:36px}.explore h1,.explore h2,.explore h3,.explore h4{font-family:Inter,Arial,sans-serif;letter-spacing:-.045em;font-weight:800;color:inherit}.explore h1{font-size:clamp(44px,6vw,80px);line-height:.99;margin:18px 0 25px;max-width:900px}.explore h2{font-size:clamp(32px,4vw,52px);line-height:1.08;margin:10px 0 22px}.explore h3{font-size:27px;line-height:1.2;margin:0 0 15px}.explore p{margin:0 0 20px}.explore a{color:var(--link);text-underline-offset:4px}.explore button,.explore input,.explore select{font:inherit}.explore button{cursor:pointer}.explore :focus-visible{outline:3px solid #ba9cff;outline-offset:4px}.explore [hidden]{display:none!important}.explore .skip-link{position:fixed;z-index:100;top:-100px;left:20px;background:var(--panel);padding:12px 20px}.explore .skip-link:focus{top:10px}
.explore .topbar{background:var(--panel);border-bottom:1px solid var(--line)}.explore .tb{height:76px;gap:20px}.explore .brand{font-family:Inter,sans-serif;font-size:26px;font-weight:800;letter-spacing:-.07em;color:var(--copy)}.explore .brand span{color:#bd4926}.explore .tb nav{gap:20px;justify-content:center}.explore .tb nav a{font-size:14px;color:var(--sub)}.explore .tb nav a.on{color:var(--copy);border-bottom-color:var(--coral)}.explore .tb .mini{font-size:13px;color:var(--sub)}.explore .tb .mini b,.explore .tb .cart b{color:var(--link)}.explore .tb .cart{font-size:13px;background:transparent;color:var(--copy);border-color:var(--line);border-radius:3px}
.ex-hero{padding:66px 0 60px;background:var(--forest);color:#fff;overflow:hidden}.ex-hero h1 span{color:var(--lime)}.ex-hero .lede{font-size:22px;line-height:1.55;max-width:750px;color:#d9e4dc}.kicker{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.13em;display:block;color:var(--link)}.ex-hero .kicker{color:var(--lime)}.ex-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:28px}.ex-btn{display:inline-flex;align-items:center;justify-content:center;gap:20px;border:1px solid var(--line);padding:13px 21px;min-height:52px;border-radius:4px;font-size:17px!important;font-weight:700;text-decoration:none;line-height:1.4;background:var(--panel);color:var(--copy)!important}.ex-btn:hover{background:var(--soft)}.ex-btn.primary{background:var(--lime);color:#142b30!important;border-color:var(--lime)}.ex-btn.primary:hover{background:#e8ff8b}.ex-btn:disabled{opacity:.55;cursor:default}.ex-hero .ex-btn:not(.primary){background:transparent;color:#fff!important;border-color:#6c8378}.ex-section{padding:70px 0}.ex-alt{background:var(--panel);border-block:1px solid var(--line)}.section-intro{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:end;margin-bottom:35px}.section-intro p{color:var(--sub);font-size:20px}.section-intro h2{margin-bottom:0}.note{color:var(--sub);font-size:16px}.ex-status{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);width:max-content;max-width:calc(100% - 32px);z-index:60;background:var(--lime);color:#142b30;padding:14px 22px;box-shadow:0 5px 30px #0005;border-radius:5px;font-size:17px;font-weight:600}.ex-status:empty{display:none}
/* A connected route map, not six generic cards. */
.route-top{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:25px;margin:42px 0 0}.route-top:before,.route-top:after{content:'';height:1px;background:#718477}.route-hub{border:1px solid #81968a;border-radius:100px;padding:14px 24px;color:var(--lime);font-size:19px;font-weight:700}.topic-map{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:0}.topic-route{color:white!important;text-decoration:none;position:relative;border-bottom:1px solid #567267;padding:34px 25px 24px;display:grid;grid-template-columns:46px 1fr;gap:16px}.topic-route:before{content:'';position:absolute;height:24px;top:0;left:47px;border-left:1px solid #718477}.topic-route:hover{background:#27423e}.route-num{font-size:21px;width:45px;height:45px;border-radius:50%;background:var(--lime);color:#142b30;display:grid;place-items:center;font-weight:800}.topic-route:nth-child(2n) .route-num{background:var(--coral)}.topic-route:nth-child(3n) .route-num{background:var(--lavender)}.topic-route strong{font-size:22px;letter-spacing:-.03em;display:block;line-height:1.3}.topic-route small{display:block;font-size:15px;margin-top:8px;color:#d0ddd4}.quick-start{display:grid;grid-template-columns:150px 1fr auto;gap:32px;align-items:center;padding:30px 0}.quick-start .big-num{font-size:76px;font-weight:800;letter-spacing:-.09em;color:var(--link);line-height:1}.quick-start strong{font-size:25px;letter-spacing:-.04em;display:block}.quick-start p{margin:8px 0 0;color:var(--sub)}
.ex-controls{display:grid;grid-template-columns:2fr 1fr;gap:18px;margin:28px 0}.ex-controls label,.filter-label{font-size:15px;font-weight:700;display:block}.ex-controls input,.ex-controls select,.cite-form select{background:var(--panel);color:var(--copy);border:1px solid var(--line);border-radius:4px;padding:13px 15px;width:100%;min-height:54px;margin-top:7px;min-width:0}.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.filter-btn{font-size:16px!important;border:1px solid var(--line);border-radius:100px;background:var(--panel);color:var(--copy);padding:10px 17px}.filter-btn[aria-pressed=true]{background:var(--lime);color:#142b30;border-color:var(--lime)}.results-line{display:flex;gap:20px;align-items:center;justify-content:space-between;margin:25px 0;color:var(--sub)}.text-btn{border:0;background:none;color:var(--link);text-decoration:underline;text-underline-offset:4px;padding:5px;font-size:16px!important}.topic-heading{display:flex;gap:24px;align-items:center;margin:45px 0 20px;scroll-margin-top:110px}.topic-heading .route-num{flex:none}.topic-heading h2{font-size:32px;margin:0}.question{border-top:1px solid var(--line);scroll-margin-top:108px}.question:last-child{border-bottom:1px solid var(--line)}.question>summary{list-style:none;display:grid;grid-template-columns:60px 1fr 30px;gap:20px;padding:26px 0;cursor:pointer;align-items:start}.question>summary::-webkit-details-marker{display:none}.question>summary:after{content:'+';font-size:32px;line-height:1;font-weight:400;color:var(--link)}.question[open]>summary:after{content:'−'}.q-label{font-size:18px;font-weight:800;color:var(--link)}.question>summary strong{display:block;font-size:24px;line-height:1.35;letter-spacing:-.035em}.question>summary small{font-size:15px;color:var(--sub);display:block;margin-top:6px}.question-body{padding:0 50px 32px 80px;max-width:960px}.question-body p{font-size:19px}.question-body ul{padding-left:24px;margin:15px 0 25px}.question-body li{margin-bottom:10px}.official-text{padding:17px 20px;border-left:3px solid var(--lavender);background:var(--panel);margin:24px 0}.official-text summary{font-size:17px;font-weight:700;cursor:pointer}.official-text p{font-size:17px;margin-top:18px}.q-tip{padding:18px 22px;background:var(--soft);border-left:3px solid var(--lime)}.q-links{display:flex;gap:20px;flex-wrap:wrap;font-size:16px;margin-top:20px}
/* Compare evidence by what it can answer. */
.evidence-chain{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #779084;margin-top:44px;gap:36px}.chain-node{position:relative;padding-top:30px}.chain-node:before{content:'';position:absolute;top:-7px;left:0;width:13px;height:13px;background:var(--lime);border-radius:50%}.chain-node:nth-child(2):before{background:var(--coral)}.chain-node:nth-child(3):before{background:var(--lavender)}.chain-node strong{font-size:25px;letter-spacing:-.04em;display:block}.chain-node p{font-size:17px;line-height:1.55;margin:10px 0 0;color:#d0ddd4}.new-angles{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;border-bottom:1px solid var(--line)}.angle{padding:25px 0 30px;border-top:4px solid var(--coral)}.angle:nth-child(2){border-color:var(--lavender)}.angle:nth-child(3){border-color:var(--lime)}.angle .stat{font-size:64px;font-weight:800;letter-spacing:-.075em;line-height:1.1;margin:10px 0}.angle h3{font-size:25px}.angle p{font-size:18px;color:var(--sub)}.angle a{font-weight:700;font-size:17px}.evidence-controls{grid-template-columns:2fr 1fr 1fr}.study{padding:33px 0 38px;border-top:1px solid var(--line);scroll-margin-top:110px}.study-heading{display:grid;grid-template-columns:110px 1fr;gap:28px}.study-year{font-size:38px;line-height:1.1;font-weight:800;letter-spacing:-.065em;color:var(--link)}.study-year span{display:block;letter-spacing:0;font-size:14px;font-weight:500;line-height:1.5;margin-top:10px;color:var(--sub)}.study h3{max-width:880px;font-size:28px;margin:10px 0}.study .byline{font-size:16px;color:var(--sub);margin-bottom:16px}.direction{font-size:14px;font-weight:700;color:var(--copy);display:inline-flex;align-items:center;gap:10px}.direction:before{content:'';width:10px;height:10px;border-radius:50%;background:var(--dir,var(--lavender))}.study-comparison{display:grid;grid-template-columns:1fr 1fr;gap:38px;margin:12px 0 20px}.study-comparison>div{border-left:3px solid var(--lime);padding:5px 0 2px 20px}.study-comparison>div+div{border-color:var(--coral)}.study-comparison b{display:block;font-size:14px;text-transform:uppercase;letter-spacing:.07em;margin-bottom:10px;color:var(--link)}.study-comparison>div+div b{color:var(--coral)}[data-theme=light] .study-comparison>div+div b{color:#9e4326}.study-comparison p{font-size:18px;margin:0}.study-detail{margin-left:138px}.study-detail summary{font-size:17px;color:var(--link);font-weight:600;cursor:pointer}.study-detail p{font-size:17px;margin:18px 0}.cite-form{display:flex;gap:13px;flex-wrap:wrap;align-items:end;margin-top:25px;padding:20px;background:var(--soft)}.cite-form label{flex:1;min-width:180px;font-size:15px;font-weight:700}.cite-form .ex-btn{margin:0}.cite-form .saved-note{font-size:15px;color:var(--sub);flex-basis:100%;margin:0}.source-links{display:flex;flex-wrap:wrap;gap:20px;font-size:16px;margin:20px 0}.coverage-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 50px}.coverage-row{display:grid;grid-template-columns:1fr 85px;gap:16px;align-items:center;border-top:1px solid var(--line);padding:15px 0;text-decoration:none;color:var(--copy)!important;font-size:17px}.coverage-row b{color:var(--link);font-size:23px;text-align:right}.coverage-row small{font-size:13px;color:var(--sub)}.research-prompt{display:grid;grid-template-columns:repeat(4,1fr);counter-reset:step;gap:0;margin:30px 0}.research-prompt>div{border-top:2px solid var(--line);position:relative;padding:32px 26px 0 0}.research-prompt>div:before{counter-increment:step;content:counter(step);position:absolute;top:-18px;left:0;background:var(--lime);color:#142b30;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;font-weight:700}.research-prompt strong{font-size:22px;display:block;line-height:1.3}.research-prompt p{font-size:17px;color:var(--sub);margin-top:12px}
/* Spectrum / circadian diagrams. */
.spectrum-track{display:grid;grid-template-columns:1fr 1.5fr 1fr 1fr;gap:4px;margin:35px 0 15px}.spectrum-band{padding:35px 20px;background:#aec8ef;color:#142b30;min-height:170px}.spectrum-band:nth-child(2){background:#a0dcc5}.spectrum-band:nth-child(3){background:#f7ba8f}.spectrum-band:nth-child(4){background:linear-gradient(110deg,#f6a29a,#f1e288,#9fdbb0,#a7bafa,#c9a3ec)}.spectrum-band strong{font-size:25px;display:block;letter-spacing:-.045em;line-height:1.2}.spectrum-band small{font-size:16px;display:block;margin-top:15px}.spectrum-axis{display:flex;align-items:center;gap:15px;font-size:15px;color:var(--sub)}.spectrum-axis:after{content:'→';font-size:28px}.spectrum-axis span{flex:1;border-top:1px solid var(--line)}.circadian-flow{display:grid;grid-template-columns:1fr 1fr 1fr;gap:40px;margin:38px 0}.circadian-node{position:relative;border-top:3px solid var(--lavender);padding-top:24px}.circadian-node:not(:last-child):after{content:'→';position:absolute;right:-30px;top:43px;color:var(--link);font-size:30px}.circadian-icon{font-size:53px;color:var(--link);line-height:1.1;display:block;margin-bottom:22px}.circadian-node p{color:var(--sub);font-size:18px}.day-cycle{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-radius:5px;overflow:hidden;margin:35px 0}.day-part{padding:35px 28px;background:#f0e99f;color:#142b30}.day-part:nth-child(2){background:#eab68d}.day-part:nth-child(3){background:#3e3559;color:#f3ecff}.day-part .time-symbol{font-size:55px;display:block;line-height:1;margin-bottom:25px}.day-part p{font-size:18px;margin-bottom:0}.display-choice{display:flex;gap:35px;align-items:center;border:1px solid var(--line);padding:30px;margin-top:35px}.display-choice p{margin:0;font-size:18px;color:var(--sub);flex:1}.display-choice strong{color:var(--copy)}.ex-footer-cta{background:var(--lime);color:#142b30;padding:55px 0}.ex-footer-cta .wrap{display:flex;gap:35px;align-items:center;justify-content:space-between}.ex-footer-cta h2{font-size:38px;margin:0 0 10px}.ex-footer-cta p{margin:0;font-size:19px}.ex-footer-cta .ex-btn{background:#142b30;color:#fff!important;border-color:#142b30;flex:none}.explore footer .disc,.explore footer p{font-size:15px;line-height:1.7}.explore footer{padding:40px 0}
@media(max-width:1100px){.explore .tb{height:auto;min-height:76px;flex-wrap:wrap;padding:14px 0;gap:14px}.explore .tb nav{order:3;flex-basis:100%;justify-content:flex-start;overflow:auto;flex-wrap:nowrap;padding:4px 0}.explore .tb nav a{white-space:nowrap}.explore .tb .mini{margin-left:auto}.explore .tb .cart{margin-left:0}.explore .topbar{position:relative}.ex-hero h1{font-size:65px}.topic-route{padding-inline:12px;gap:12px}.topic-route:before{left:34px}.quick-start{grid-template-columns:110px 1fr}.quick-start .ex-btn{grid-column:2}.evidence-controls{grid-template-columns:1fr 1fr}.evidence-controls label:first-child{grid-column:1/-1}}
@media(max-width:700px){.explore .wrap{padding-inline:22px}.ex-hero{padding:44px 0}.explore h1,.ex-hero h1{font-size:46px}.explore h2{font-size:36px}.ex-hero .lede{font-size:20px}.ex-section{padding:45px 0}.topic-map{grid-template-columns:1fr 1fr}.topic-route{grid-template-columns:35px 1fr;padding:28px 10px 22px 0;gap:10px}.route-num{width:34px;height:34px;font-size:17px}.topic-route:before{left:17px}.topic-route strong{font-size:18px}.topic-route small{font-size:14px}.route-hub{font-size:16px;padding:12px 18px}.route-top{gap:10px}.quick-start{grid-template-columns:75px 1fr;gap:20px}.quick-start .big-num{font-size:55px}.quick-start strong{font-size:23px}.section-intro{grid-template-columns:1fr;gap:20px}.ex-controls{grid-template-columns:1fr}.evidence-controls label:first-child{grid-column:auto}.question>summary{grid-template-columns:40px 1fr 22px;gap:10px;padding:22px 0}.question>summary strong{font-size:21px}.question-body{padding:0 0 28px}.question-body p{font-size:18px}.topic-heading{gap:14px}.topic-heading h2{font-size:28px}.evidence-chain{grid-template-columns:1fr;gap:0;border-top:0;border-left:1px solid #779084;padding-left:25px}.chain-node{padding:0 0 24px}.chain-node:before{left:-32px;top:8px}.chain-node:last-child{padding-bottom:0}.new-angles{grid-template-columns:1fr;gap:0}.angle{display:grid;grid-template-columns:95px 1fr;gap:0 20px;padding:25px 0}.angle .stat{grid-row:1/4;font-size:49px;margin:0}.angle h3{font-size:24px}.angle p{font-size:17px}.study-heading{grid-template-columns:1fr;gap:15px}.study-year{font-size:29px;display:flex;gap:15px;align-items:center}.study-year span{margin:0}.study h3{font-size:25px}.study-comparison{grid-template-columns:1fr;gap:25px}.study-detail{margin-left:0}.coverage-grid{grid-template-columns:1fr}.research-prompt{grid-template-columns:1fr 1fr;gap:40px 15px}.research-prompt>div{padding-right:8px}.spectrum-track{grid-template-columns:1fr 1fr}.spectrum-band{min-height:155px;padding:25px 18px}.spectrum-band strong{font-size:23px}.circadian-flow{grid-template-columns:1fr;gap:30px}.circadian-node:not(:last-child):after{display:none}.circadian-node{display:grid;grid-template-columns:60px 1fr;gap:0 20px}.circadian-icon{grid-row:1/3;font-size:44px}.circadian-node h3{font-size:25px}.circadian-node p{margin:0}.day-cycle{grid-template-columns:1fr}.day-part{display:grid;grid-template-columns:55px 1fr;gap:0 20px;padding:28px 24px}.day-part .time-symbol{grid-row:1/3;font-size:44px}.display-choice{flex-direction:column;align-items:start;padding:24px}.ex-footer-cta .wrap{flex-direction:column;align-items:start}.ex-footer-cta h2{font-size:33px}.explore .tb .mini{display:none}.explore .themebtn{margin-left:auto}.explore .tb .cart{font-size:12px;padding:8px}.results-line{align-items:start;font-size:16px}.ex-actions .ex-btn{max-width:100%}}
@media(prefers-reduced-motion:reduce){.explore *{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:480px){.spectrum-track{grid-template-columns:1fr}.spectrum-band{min-height:0;display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}.spectrum-band strong{font-size:21px;overflow-wrap:anywhere}.spectrum-band small{margin:0;font-size:15px}.spectrum-axis:after{content:'↓'}}

/* Topic-first questions and matched secondary action geometry. */
.questions-page .question>summary{grid-template-columns:minmax(0,1fr) 30px}.questions-page .question-body{padding-left:0}.q-links{align-items:center;gap:12px}.q-links>button,.q-links>a{display:inline-flex;align-items:center;justify-content:center;min-height:46px;margin:0;padding:10px 14px;border:1px solid var(--line);border-radius:3px;background:transparent;font:600 16px/1.4 Inter,sans-serif!important;color:var(--link);text-decoration:none;text-align:center;box-sizing:border-box}.q-links>button:hover,.q-links>a:hover{background:var(--soft);text-decoration:underline}.questions-page .quick-start .big-num{font-size:45px}.questions-page .question>summary small{font-size:16px}@media(max-width:700px){.questions-page .question>summary{grid-template-columns:minmax(0,1fr) 22px}.q-links{display:grid;grid-template-columns:1fr 1fr;align-items:stretch;gap:10px}.q-links>button,.q-links>a{padding:10px 8px;min-height:54px}}