:root{
  --paper:#f4f2ea;--ink:#152019;--soft:#536158;--muted:#727b74;--signal:#a64624;
  --night:#07100f;--night2:#0b1514;--star:#f4efe4;--cold:#a9c6c3;--warm:#d79b67;
  --line:rgba(244,242,234,.14);--line2:rgba(244,242,234,.07);--paperline:rgba(21,32,25,.12);
  --sans:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --serif:"Songti SC",STSong,"Noto Serif CJK SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --mono:"SFMono-Regular","Roboto Mono","Liberation Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.16,1,.3,1);--pad:clamp(22px,4.6vw,72px);
}
*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--night);color:var(--star);font-family:var(--sans);-webkit-font-smoothing:antialiased}html{scroll-behavior:smooth}body{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}::selection{background:rgba(215,155,103,.3)}
.site-head{position:fixed;z-index:100;inset:0 0 auto;height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 var(--pad);background:rgba(244,242,234,.98);border-bottom:1px solid rgba(21,32,25,.08);color:var(--ink)}
.geogeek-logo{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:720;letter-spacing:-.035em}.geo-mark{position:relative;width:20px;height:20px;border:1px solid #526057;border-radius:50%;display:inline-block;background:radial-gradient(circle at center,var(--signal) 0 2px,transparent 2.6px)}.geo-mark:before,.geo-mark:after{content:"";position:absolute;background:#526057}.geo-mark:before{left:9px;top:-2px;width:1px;height:24px}.geo-mark:after{left:-2px;top:9px;width:24px;height:1px}
.header-tools{display:flex;align-items:center;gap:10px}.head-meta{color:#707971;font:650 10px/1 var(--mono);letter-spacing:.08em}.lang{display:flex;border-left:1px solid var(--paperline);padding-left:14px;gap:2px}.lang button{border:0;background:transparent;padding:9px 8px;color:#707971;cursor:pointer;font-size:13px;font-weight:650}.lang button[aria-pressed="true"]{color:var(--ink)}
#sky{position:fixed;z-index:0;inset:72px 0 0;width:100%;height:calc(100% - 72px);pointer-events:none}.nebula{position:fixed;z-index:0;inset:72px 0 0;pointer-events:none;background:radial-gradient(ellipse at 68% 32%,rgba(93,130,126,.08),transparent 28%),radial-gradient(ellipse at 32% 76%,rgba(166,70,36,.055),transparent 24%)}
.story{position:fixed;z-index:2;left:0;right:0;top:72px;bottom:0;overflow-y:auto;scroll-snap-type:y mandatory;overscroll-behavior-y:contain;scrollbar-width:none}.story::-webkit-scrollbar{display:none}.page{position:relative;min-height:calc(100dvh - 72px);height:calc(100dvh - 72px);scroll-snap-align:start;scroll-snap-stop:always;overflow:hidden;padding:clamp(34px,5vh,60px) var(--pad);display:grid;align-items:center}.page-inner{position:relative;width:min(1320px,100%);margin:0 auto;display:grid;grid-template-columns:minmax(0,.86fr) minmax(360px,1.14fr);gap:clamp(48px,7vw,110px);align-items:center}.page.copy-wide .page-inner{grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr)}
.chapter{margin:0 0 18px;color:var(--cold);font:700 10px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase}.display{margin:0;font-family:var(--serif);font-size:clamp(46px,5.7vw,86px);line-height:1.06;font-weight:500;letter-spacing:-.05em}.display em{font-style:normal;color:var(--warm)}.lead{margin:28px 0 0;max-width:720px;color:#cbd3d0;font:400 clamp(18px,1.5vw,23px)/1.7 var(--serif)}.lead strong{font-weight:500;color:#fff}.micro{margin-top:26px;color:#7f8e8a;font:650 10px/1.55 var(--mono);letter-spacing:.04em;max-width:680px}.punch{margin-top:34px;padding-top:20px;border-top:1px solid var(--line);font-family:var(--serif);font-size:clamp(24px,2.6vw,39px);line-height:1.45;color:#fff;max-width:780px}.punch em{font-style:normal;color:var(--warm)}
.rail{position:fixed;z-index:80;right:18px;top:50%;transform:translateY(-45%);display:grid;gap:12px}.rail button{width:28px;height:28px;border:0;background:transparent;cursor:pointer;position:relative}.rail button:before{content:"";position:absolute;left:50%;top:50%;width:4px;height:4px;border-radius:50%;background:rgba(244,242,234,.32);transform:translate(-50%,-50%);transition:.3s var(--ease)}.rail button:after{content:"";position:absolute;inset:3px;border:1px solid transparent;border-radius:50%;transition:.3s var(--ease)}.rail button[aria-current="true"]:before{width:6px;height:6px;background:var(--warm);box-shadow:0 0 18px rgba(215,155,103,.5)}.rail button[aria-current="true"]:after{border-color:rgba(215,155,103,.42)}
.page-no{position:absolute;left:var(--pad);bottom:19px;color:#6f7e7a;font:650 10px/1 var(--mono);letter-spacing:.1em}.next-hint{position:absolute;right:var(--pad);bottom:17px;display:flex;align-items:center;gap:10px;color:#73817d;font:650 10px/1 var(--mono);letter-spacing:.08em}.next-hint i{width:44px;height:1px;background:#586763;position:relative}.next-hint i:after{content:"";position:absolute;right:0;top:-3px;width:6px;height:6px;border-right:1px solid #7e8c88;border-bottom:1px solid #7e8c88;transform:rotate(-45deg)}
.cover .page-inner{grid-template-columns:minmax(0,1.04fr) minmax(340px,.96fr)}.cover .display{font-size:clamp(48px,5.8vw,92px)}.cover .display small{display:block;margin-bottom:14px;color:#d8dfdc;font:500 .38em/1.4 var(--serif);letter-spacing:-.02em}.cover .lead{font-size:clamp(20px,1.8vw,27px)}.human-field{height:min(66vh,640px);position:relative;border-left:1px solid var(--line2);overflow:hidden}.planet-arc{position:absolute;right:-30%;bottom:-36%;width:115%;aspect-ratio:1;border-radius:50%;border:1px solid rgba(169,198,195,.35);background:radial-gradient(circle at 30% 20%,rgba(127,164,158,.24),rgba(22,47,44,.1) 28%,rgba(5,12,12,.88) 69%,#030807 71%);box-shadow:-60px -50px 160px rgba(82,128,122,.08)}.orbit{position:absolute;left:7%;top:22%;width:93%;height:42%;border:1px solid rgba(169,198,195,.13);border-radius:50%;transform:rotate(-17deg)}.dust-word{position:absolute;right:2%;top:12%;color:#687873;font:650 9px/1.6 var(--mono);letter-spacing:.14em;text-align:right}.person{position:absolute;left:26%;bottom:13%;width:3px;height:34px;background:#e7ded0;box-shadow:0 0 16px rgba(231,222,208,.13)}.person:before{content:"";position:absolute;left:-3px;top:-8px;width:9px;height:9px;border-radius:50%;background:#e7ded0}.person:after{content:"";position:absolute;left:-8px;bottom:-1px;width:19px;height:1px;background:rgba(231,222,208,.62)}.human-caption{position:absolute;left:31%;bottom:12.5%;color:#7d8a86;font:650 9px/1.4 var(--mono);letter-spacing:.08em}
.observe-stage{height:min(62vh,600px);border:1px solid var(--line);position:relative;overflow:hidden;background:#091311;cursor:crosshair}.observe-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(244,242,234,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(244,242,234,.045) 1px,transparent 1px);background-size:36px 36px}.obs-shape{position:absolute;border:1px solid rgba(169,198,195,.17);border-radius:48% 52% 42% 58%/55% 45% 55% 45%}.obs-shape.s1{left:9%;top:12%;width:46%;height:44%;transform:rotate(-12deg)}.obs-shape.s2{right:5%;bottom:8%;width:52%;height:41%;transform:rotate(17deg)}.pixels{position:absolute;inset:0;opacity:.72;background:repeating-linear-gradient(90deg,rgba(169,198,195,.035) 0 12px,transparent 12px 24px),repeating-linear-gradient(0deg,rgba(215,155,103,.025) 0 12px,transparent 12px 24px)}.scan{position:absolute;left:0;top:0;width:1px;height:100%;background:linear-gradient(transparent,rgba(215,155,103,.9),transparent);box-shadow:0 0 24px rgba(215,155,103,.35);transform:translateX(50%);transition:transform .1s linear}.lens{position:absolute;width:180px;height:180px;border:1px solid rgba(244,242,234,.28);border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;background:radial-gradient(circle,rgba(244,242,234,.06),rgba(244,242,234,0) 66%);box-shadow:0 0 0 999px rgba(0,0,0,.08)}.lens:before{content:"WORLD?";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:rgba(244,242,234,.42);font:700 10px/1 var(--mono);letter-spacing:.1em}.stage-label{position:absolute;left:18px;top:16px;color:#798984;font:650 9px/1.5 var(--mono);letter-spacing:.08em}.stage-foot{position:absolute;left:18px;right:18px;bottom:15px;display:flex;justify-content:space-between;color:#70807b;font:650 9px/1 var(--mono);letter-spacing:.08em}
.shift-stage{border:1px solid var(--line);min-height:470px;padding:28px;background:rgba(8,17,16,.76);display:grid;grid-template-rows:auto 1fr auto;gap:22px}.split-toggle{display:flex;gap:7px}.split-toggle button{border:1px solid var(--line);background:transparent;padding:10px 13px;cursor:pointer;color:#80908b;font:700 10px/1 var(--mono);letter-spacing:.06em}.split-toggle button.is-active{border-color:rgba(215,155,103,.45);color:#f4efe4;background:rgba(166,70,36,.08)}.shift-map{position:relative;min-height:260px;border-top:1px solid var(--line2);border-bottom:1px solid var(--line2);overflow:hidden}.shift-map:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(244,242,234,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(244,242,234,.04) 1px,transparent 1px);background-size:34px 34px}.region{position:absolute;border:1px solid rgba(169,198,195,.22);border-radius:48% 52% 60% 40%/45% 55% 45% 55%;transition:all .7s var(--ease)}.region.train{left:12%;top:18%;width:34%;height:48%;background:rgba(169,198,195,.06)}.region.test{left:34%;top:35%;width:29%;height:42%;background:rgba(215,155,103,.045);border-color:rgba(215,155,103,.32)}.shift-stage.is-spatial .region.test{left:67%;top:28%;width:27%;height:43%}.region span{position:absolute;left:12px;top:11px;color:#81908c;font:650 9px/1 var(--mono);letter-spacing:.08em}.region.test span{color:#bb8e6b}.shift-arrow{position:absolute;left:48%;top:51%;width:20%;height:1px;background:linear-gradient(90deg,rgba(169,198,195,.3),rgba(215,155,103,.5));opacity:0;transform:scaleX(.4);transform-origin:left;transition:.7s var(--ease)}.shift-stage.is-spatial .shift-arrow{opacity:1;transform:scaleX(1)}.shift-arrow:after{content:"";position:absolute;right:0;top:-3px;width:6px;height:6px;border-right:1px solid var(--warm);border-top:1px solid var(--warm);transform:rotate(45deg)}.scoreline{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;color:#899792;font:650 9px/1 var(--mono);letter-spacing:.07em}.scorebar{height:2px;background:rgba(244,242,234,.1);position:relative}.scorebar i{position:absolute;inset:0 auto 0 0;width:92%;background:var(--cold);transition:width .7s var(--ease),background .7s}.shift-stage.is-spatial .scorebar i{width:74%;background:var(--warm)}.score-number{color:#d7dfdc;font-size:12px;min-width:42px;text-align:right}.evidence-note{color:#697975;font:650 9px/1.5 var(--mono);letter-spacing:.03em}
.scale-stage{height:min(60vh,560px);border:1px solid var(--line);position:relative;background:rgba(6,14,13,.8);overflow:hidden}.network{position:absolute;inset:0}.network svg{width:100%;height:100%}.network line{stroke:rgba(169,198,195,.18);stroke-width:1;transition:.6s var(--ease)}.network circle{fill:#091311;stroke:#89aaa5;stroke-width:1.2;transition:.6s var(--ease)}.network .focus{fill:var(--warm);stroke:var(--warm);filter:drop-shadow(0 0 7px rgba(215,155,103,.45))}.network text{fill:#7d8e89;font:650 9px var(--mono);letter-spacing:.06em;transition:.5s var(--ease)}.scale-control{position:absolute;left:20px;right:20px;bottom:20px;padding:14px 16px;border:1px solid var(--line2);background:rgba(5,11,10,.82);display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center}.scale-control span{color:#82908c;font:650 9px/1 var(--mono);letter-spacing:.08em}.scale-control input{width:100%;accent-color:var(--warm)}.scale-readout{color:#eee8dd!important;min-width:66px;text-align:right}.scale-caption{position:absolute;left:21px;top:19px;max-width:280px;color:#70817c;font:650 9px/1.6 var(--mono);letter-spacing:.05em}
.world-stage{height:min(60vh,560px);border:1px solid var(--line);position:relative;overflow:hidden;background:linear-gradient(180deg,#0b1514,#07100f);perspective:900px}.world-grid{position:absolute;left:8%;right:8%;bottom:-6%;height:72%;background-image:linear-gradient(rgba(169,198,195,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(169,198,195,.10) 1px,transparent 1px);background-size:44px 44px;transform:rotateX(66deg) rotateZ(-10deg);transform-origin:center bottom;transition:transform .2s ease-out}.world-cube{position:absolute;width:95px;height:95px;border:1px solid rgba(169,198,195,.24);background:rgba(169,198,195,.025);transform:rotate(18deg) skewY(-8deg)}.world-cube.c1{left:19%;top:31%}.world-cube.c2{left:48%;top:21%;width:125px;height:125px}.world-cube.c3{right:15%;top:42%;width:76px;height:76px}.world-question{position:absolute;inset:auto 24px 24px auto;text-align:right}.world-question small{display:block;color:#6c7d78;font:650 9px/1 var(--mono);letter-spacing:.1em}.world-question strong{display:block;margin-top:9px;font:500 clamp(25px,2.4vw,38px)/1.2 var(--serif);color:#efeae0}.geo-tags{position:absolute;inset:22px 22px auto;display:flex;flex-wrap:wrap;gap:6px}.geo-tags span{border:1px solid rgba(244,242,234,.10);padding:8px 9px;color:#788984;font:650 9px/1 var(--mono);letter-spacing:.06em}.geo-tags span:last-child{border-color:rgba(215,155,103,.28);color:#b89172}
.finale .page-inner{grid-template-columns:minmax(0,1fr) minmax(260px,.54fr)}.finale .display{font-size:clamp(43px,5vw,78px)}.principles{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.principles div{padding:17px 22px 18px 0;border-right:1px solid var(--line2)}.principles div+div{padding-left:22px}.principles div:last-child{border-right:0}.principles small{display:block;color:#768681;font:650 9px/1 var(--mono);letter-spacing:.08em}.principles b{display:block;margin-top:10px;color:#e7e5dc;font:500 17px/1.45 var(--serif)}.final-human{height:min(64vh,590px);position:relative}.final-human .person{left:50%;bottom:12%;height:47px}.final-human .human-caption{left:54%;bottom:12.4%}.halo{position:absolute;left:50%;top:46%;width:380px;height:380px;border:1px solid rgba(215,155,103,.12);border-radius:50%;transform:translate(-50%,-50%)}.halo:before,.halo:after{content:"";position:absolute;inset:12%;border:1px solid rgba(169,198,195,.10);border-radius:50%}.halo:after{inset:28%}.shareline{margin-top:22px;color:#87958f;font:650 10px/1.55 var(--mono);letter-spacing:.04em}
.evidence-button{position:fixed;z-index:90;left:var(--pad);bottom:16px;border:0;background:transparent;color:#71807c;cursor:pointer;font:650 9px/1 var(--mono);letter-spacing:.08em}.evidence-button:hover{color:#d0d9d5}.drawer{position:fixed;z-index:120;inset:72px 0 0;background:rgba(4,9,8,.72);backdrop-filter:blur(12px);display:none;align-items:flex-end}.drawer.is-open{display:flex}.drawer-card{width:100%;max-height:72vh;overflow:auto;background:var(--paper);color:var(--ink);padding:clamp(28px,4vw,54px) var(--pad);border-top:1px solid var(--paperline)}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.drawer-head h2{margin:0;font:500 clamp(28px,3vw,46px)/1.1 var(--serif);letter-spacing:-.03em}.drawer-close{border:1px solid var(--paperline);background:transparent;padding:10px 12px;cursor:pointer;color:var(--soft)}.sources{margin:30px 0 0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--paperline)}.sources li{padding:19px 28px 19px 0;border-bottom:1px solid var(--paperline);color:#4d5a52;font-size:13px;line-height:1.6}.sources li:nth-child(even){padding-left:28px;border-left:1px solid var(--paperline)}.sources a{text-decoration:underline;text-underline-offset:3px}.drawer-note{margin-top:20px;color:#6e786f;font:650 10px/1.5 var(--mono)}
.reveal{opacity:.18;transform:translateY(14px);transition:opacity .8s var(--ease),transform .8s var(--ease)}.page.is-active .reveal{opacity:1;transform:none}.page.is-active .reveal.d1{transition-delay:.08s}.page.is-active .reveal.d2{transition-delay:.16s}.page.is-active .reveal.d3{transition-delay:.24s}
@media(max-width:900px){.head-meta{display:none}.page{height:auto;min-height:calc(100dvh - 72px);overflow:visible;padding-right:max(var(--pad),48px)}.page-inner,.cover .page-inner,.page.copy-wide .page-inner,.finale .page-inner{grid-template-columns:1fr;gap:38px}.human-field,.final-human{height:36vh;min-height:260px}.observe-stage,.scale-stage,.world-stage{height:44vh;min-height:330px}.shift-stage{min-height:390px}.principles{grid-template-columns:1fr}.principles div,.principles div+div{padding:14px 0;border-right:0;border-bottom:1px solid var(--line2)}.principles div:last-child{border-bottom:0}.sources{grid-template-columns:1fr}.sources li:nth-child(even){padding-left:0;border-left:0}.rail{right:8px}.evidence-button{display:none}}
@media(max-width:560px){.site-head{height:64px}.geogeek-logo{font-size:20px}.story{top:64px}.page{min-height:calc(100dvh - 64px);padding-top:32px;padding-bottom:54px}.display,.cover .display{font-size:clamp(39px,11vw,59px)}.lead{font-size:18px}.human-field{display:none}.cover .page-inner{display:block}.shift-stage{padding:18px}.scale-control{grid-template-columns:1fr;gap:10px}.world-stage{min-height:320px}.world-cube{transform:scale(.75) rotate(18deg) skewY(-8deg)}.page-no{bottom:14px}.next-hint{display:none}.drawer{inset:64px 0 0}.lang{padding-left:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.region,.scorebar i,.network line,.network circle,.network text{transition:none}}