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60px}.exp-course-card{min-height:370px;position:relative;overflow:hidden;text-align:left;background:radial-gradient(ellipse at 72% 30%,color-mix(in srgb,var(--card-accent) 10%,#0d1520),#0c1420 80%);border:1px solid #344354;border-radius:8px;padding:25px;transition:border-color .2s,transform .2s}.exp-course-card:hover{border-color:var(--card-accent);transform:translateY(-3px)}.exp-course-card>span{font-size:9px;letter-spacing:1px;color:var(--card-accent);line-height:1.8;position:relative;z-index:1}.exp-course-card h2{font:400 31px/1.2 Georgia,serif;margin:180px 0 14px;position:relative}.exp-course-card p{font-size:12px;line-height:1.8;color:#b8c9da;position:relative}.exp-course-card strong{font-size:11px;line-height:1.7;color:var(--card-accent);display:block;margin-top:20px}.course-miniature{position:absolute;width:180px;height:180px;right:35px;top:44px;border-radius:50%;background:radial-gradient(circle at 33% 27%,var(--card-accent),#223745 48%,#03080c 76%);box-shadow:0 0 45px color-mix(in srgb,var(--card-accent) 12%,transparent)}.asteroid .course-miniature{border-radius:35% 57% 48% 32%;transform:rotate(-20deg);background:repeating-radial-gradient(ellipse at 40% 25%,#788274 0,#788274 8px,#4a544c 9px,#4a544c 19px,#1e2a27 22px,#1e2a27 27px)}.comet .course-miniature{width:85px;height:85px;top:83px;right:140px;transform:rotate(-24deg)}.comet .course-miniature:after{content:"";position:absolute;left:60px;top:-4px;width:190px;height:90px;background:linear-gradient(90deg,#bbeafb99,transparent);clip-path:polygon(0 15%,100% 50%,0 95%)}.belts .course-miniature{height:70px;border:20px dotted #a6a7ea88;background:none;transform:rotate(-27deg);top:100px}.wind .course-miniature:before{content:"";position:absolute;left:-80px;top:35px;width:200px;height:100px;border-top:2px solid #a1eed88a;border-bottom:2px solid #a1eed88a;border-radius:50%}.sunlife .course-miniature{background:radial-gradient(circle at 30% 30%,#fff3b6,#ffc369 40%,#c94319 74%);box-shadow:0 0 90px 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.exp-stages{grid-template-columns:repeat(3,minmax(0,1fr))}.exp-lab,.exp-reflection{gap:30px}.topbar nav{gap:16px}.local-tag{display:none}.exp-stamp{font-size:70px}}@media(max-width:760px){.expedition{padding:16px 5vw 40px}.exp-breadcrumb{flex-wrap:wrap}.exp-breadcrumb>span{font-size:8px;order:3;width:100%}.exp-heading{padding:26px 0}.exp-heading h1{font-size:43px;letter-spacing:-1px}.exp-heading p{font-size:13px}.exp-stamp{display:none}.exp-layout,.expedition-belts .exp-layout{grid-template-columns:1fr}.exp-visual{min-height:470px}.exp-story{border-left:0;border-top:1px solid #2c3a4a;padding:24px}.exp-story h2{font-size:29px}.exp-story p{font-size:14px}.exp-model-info{left:16px;bottom:76px;max-width:calc(100% - 32px)}.exp-model-info span{font-size:11px}.exp-model-info small{font-size:9px}.exp-view-tools{right:16px;bottom:17px}.exp-gesture{left:16px;bottom:62px;font-size:9px}.exp-scene-top{left:16px;right:16px;font-size:8px}.exp-live{font-size:7px}.exp-stages,.expedition-sunlife .exp-stages,.expedition-blackhole .exp-stages{grid-template-columns:repeat(2,minmax(0,1fr))}.exp-stages button{padding:14px;min-height:112px}.exp-timeline-heading{font-size:8px;line-height:1.7}.exp-player{flex-wrap:wrap;gap:10px}.exp-player .btn{font-size:11px;flex:1;padding:12px}.exp-player>span{flex-basis:100%}.exp-player progress{width:100%}.exp-lab,.exp-reflection{grid-template-columns:1fr;gap:25px;padding-top:26px}.exp-limits{grid-template-columns:1fr;gap:8px;padding:20px}.exp-related{grid-template-columns:1fr}.exp-extra{padding:20px}.exp-extra summary{font-size:14px}.exp-formula{font-size:18px;overflow-wrap:anywhere}.course-index{padding:36px 5vw}.course-index>h1{font-size:49px}.course-lead{font-size:14px}.exp-course-cards{grid-template-columns:1fr;gap:16px}.exp-course-card{padding:24px}.course-topic{grid-template-columns:1fr;gap:15px}.course-topic li{gap:10px}.course-topic li>span{font-size:11px}.course-topic li>a{font-size:9px}.exp-sources{line-height:1.8}.expedition-asteroid .exp-heading h1{letter-spacing:-1.5px}}#exp-scene .model-hotspot{position:absolute;transform:translate(-50%,-50%);display:flex;align-items:center;gap:8px;border:1px solid color-mix(in srgb,var(--hotspot-color) 45%,#233349);border-radius:4px;background:#0a1523d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:9px 12px;color:#d6e8f4;font-size:10px;line-height:1.5;white-space:nowrap;min-height:34px;box-shadow:0 3px 20px #0008;z-index:2}#exp-scene .model-hotspot i{width:5px;height:5px;border-radius:50%;background:var(--hotspot-color);box-shadow:0 0 9px var(--hotspot-color);flex-shrink:0}.exp-model-info:has(strong:empty){display:none}.exp-visual{min-height:610px}.exp-story{padding:27px 30px}.exp-story p{line-height:1.85}.exp-heading h1{font-size:clamp(42px,4.2vw,68px)}.exp-heading{padding:20px 0 28px}.exp-stamp{font-size:86px}@media(max-width:760px){#exp-scene .model-hotspot{font-size:9px;padding:7px 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span{margin-left:3px}.topbar{gap:12px}.exp-table-scroll{width:100%}}@media(prefers-reduced-motion:reduce){.exp-course-card{transition:none}.exp-course-card:hover{transform:none}}:root{font-family:Arial,Helvetica,sans-serif;color:#e8eef5;background:#070c13;font-synthesis:none;--muted:#93a1b4;--accent:#c6edcd;--line:#28313e;--panel:#0f1620}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a,button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #bceacd;outline-offset:5px}button:disabled{opacity:.5;cursor:default}button[hidden],[hidden]{display:none!important}.topbar{height:98px;display:flex;align-items:center;justify-content:space-between;padding:0 4vw;border-bottom:1px solid var(--line);position:relative;z-index:4;background:#070c13}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:24px;letter-spacing:5px;font-weight:600}.brand 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span+span:before{content:"·";margin-right:15px}.space-stage{position:relative;grid-column:1;min-width:0;height:620px}#scene{position:absolute;top:0;right:0;bottom:0;left:0;touch-action:none}#scene canvas{display:block;width:100%;height:100%;outline:none}.stage-top{position:absolute;top:25px;left:44%;right:20px;display:flex;justify-content:space-between;align-items:center;pointer-events:none}.stage-actions{display:flex;gap:8px;pointer-events:auto}.icon-btn{height:36px;width:36px;border:1px solid #34414f;border-radius:50%;background:#0e1825aa;font-size:22px}.scene-hint{position:absolute;bottom:88px;left:50%;transform:translate(-50%);font-size:10px;white-space:nowrap;color:#9badc1}.scale-note{position:absolute;bottom:24px;left:30px;font-size:10px;line-height:1.7;color:#8091a9}.planet-label{position:absolute;transform:translate(-50%,-100%);border:0;background:#080f17a8;color:#c6d5e6;font-size:11px;padding:5px 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var(--line)}.dock-title{display:flex;justify-content:space-between;align-items:center;color:#7f90a5;font-size:10px;letter-spacing:2px}.planet-options{display:grid;grid-template-columns:repeat(9,1fr);gap:10px;padding:14px 0 24px}.planet-option{display:flex;align-items:center;gap:12px;position:relative;border:1px solid transparent;border-radius:7px;padding:12px 8px;background:none;font-size:12px;transition:background .2s}.planet-option:hover,.planet-option.selected{background:#17212e;border-color:#34485b}.planet-option small{position:absolute;bottom:4px;left:50px;font-size:8px;color:#8192a7;letter-spacing:1px}.planet-thumb{height:32px;width:32px;flex-shrink:0;border-radius:50%;background-size:auto 100%;box-shadow:inset -10px -4px 12px #000a,0 0 18px color-mix(in srgb,var(--planet-color) 12%,transparent)}.page-footer{display:flex;justify-content:space-between;align-items:center;padding:10px 4vw 22px;border-top:1px solid 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