:root{color-scheme:light;--bg:#f4f5ef;--surface:#fcfcf8;--panel:#eef1e9;--raised:#e3eae0;--ink:#233936;--muted:#5f7771;--faint:#677e76;--line:#193c291c;--accent:#227a64;--accent-ink:#fff;--gold:#8f6d2b;--shadow:0 14px 40px #2944340c;font-family:Arial,Helvetica,sans-serif;font-synthesis:none}:root[data-theme=dark]{color-scheme:dark;--bg:#111f23;--surface:#17282c;--panel:#1a2c30;--raised:#21363a;--ink:#edf4ed;--muted:#a0b4b3;--faint:#7f9998;--line:#ffffff14;--accent:#91d4bd;--accent-ink:#112b28;--gold:#d7bc88;--shadow:0 14px 40px 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120px);overflow:auto}.panel-heading{display:flex;align-items:center;justify-content:space-between}.panel h2{font:22px Georgia,serif}.panel label{display:flex;flex-direction:column;gap:10px;font-size:12px;color:var(--muted);margin-top:21px}.panel input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}.setting-note{font-size:10px;line-height:1.8;color:var(--faint);margin-top:10px}.panel .check-label{flex-direction:row;align-items:center;margin-bottom:18px}.check-label input{accent-color:var(--accent)}.button{min-height:42px;border-radius:8px;padding:11px 20px;background:var(--accent);color:var(--accent-ink);font-size:12px}.button.secondary{background:var(--raised);color:var(--accent);border:1px solid var(--line);width:100%;margin-top:17px}dialog{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:16px;width:620px;max-width:calc(100% - 28px);padding:34px;max-height:87dvh;box-shadow:var(--shadow)}dialog::backdrop{background:#071512b0;backdrop-filter:blur(8px)}.dialog-close{position:absolute;top:16px;right:16px}.dialog-ingredient-head{display:flex;gap:22px;align-items:center;margin:18px 0}.element-emblem{background:linear-gradient(135deg,#3c8d76,#215448);color:#e0fff0;border-radius:12px;min-width:90px;height:100px;display:flex;align-items:center;justify-content:center;font-size:38px;position:relative}.element-emblem small{position:absolute;top:8px;left:10px;font-size:9px}.dialog-ingredient-head h2{margin:0;font:34px Georgia,serif}.dialog-ingredient-head p{font-size:11px!important;margin:8px 0 0!important}dialog>h2{font:34px/1.2 Georgia,serif;margin:25px 0 20px}dialog p,dialog li{font-size:13px;line-height:1.85;color:var(--muted)}dialog p{margin:15px 0}dialog h3{font:22px Georgia,serif;margin-top:22px}dialog ul{padding-left:18px}dialog li{padding-bottom:8px}dialog a{color:var(--accent)}.found-worlds{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}.found-worlds button{border:1px solid var(--line);padding:10px 12px;border-radius:6px;font-size:11px;color:var(--accent);background:var(--panel)}.molecule-parts{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.molecule-parts span{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:13px 16px;font-size:20px;color:var(--accent)}.molecule-parts small{display:block;font-size:9px;margin-top:5px;color:var(--muted)}.tour-progress{position:absolute;right:18px;top:70px;width:225px;z-index:3;background:#101f26e8;border:1px solid #ffffff20;padding:16px;border-radius:10px;backdrop-filter:blur(15px);color:#e0efe7}.tour-progress>div:first-child{display:flex;justify-content:space-between;color:#91d4bd;font-size:9px}.tour-progress .eyebrow{color:#91d4bd;font-size:7px}.tour-progress p{font-size:11px;line-height:1.6;color:#b8c6c0;margin:10px 0}.tour-track{height:2px;background:#ffffff12;margin:13px 0 10px}.tour-track span{display:block;height:100%;background:#91d4bd;width:0}.tour-actions{display:flex;justify-content:space-between}.tour-actions button{font-size:10px;color:#c0d3c9;min-height:25px}#loading{position:absolute;inset:0;background:#0b1b1f;z-index:10;display:flex;align-items:center;justify-content:center;flex-direction:column;transition:opacity .8s}#loading.done{opacity:0;pointer-events:none}#loading p{color:#8ba99d;font-size:12px;margin:14px 0 25px}#loading .eyebrow{color:#a5c7b9}.loader-orbit{width:65px;height:65px;border:1px solid #91d4bd40;border-radius:50%;position:relative;margin-bottom:28px;animation:spin 3s linear infinite}.loader-orbit:before{content:'';width:20px;height:20px;background:radial-gradient(circle at 35% 35%,#b1e8d7,#328771);border-radius:50%;position:absolute;top:21px;left:21px;box-shadow:0 0 30px #91d4bd35}.loader-orbit span{position:absolute;top:8px;left:4px;width:8px;height:8px;border-radius:50%;background:#91d4bd}.loading-track{width:160px;height:2px;background:#ffffff10}.loading-track span{height:100%;width:0;background:#91d4bd;display:block;transition:width .3s}#toast{position:fixed;left:50%;bottom:25px;transform:translate(-50%,10px);z-index:90;background:var(--ink);border-radius:8px;padding:13px 20px;color:var(--bg);font-size:12px;opacity:0;pointer-events:none;transition:all .3s;max-width:90%;text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:1600px){.worlds-page{grid-template-columns:minmax(0,1fr) 420px}.inspector{padding:28px 32px}.chemistry-story{font-size:14px}.material-row p{font-size:12px}.scene-stage{height:590px}.intro{padding-top:40px;padding-bottom:32px}.worlds-left{padding-right:34px}.planet-button{font-size:10px}}
@media(max-width:1150px){.topbar{gap:25px;padding:15px 25px}.breadcrumb{font-size:11px;gap:11px}.intro{padding:28px 25px 24px}.intro-mark{display:none}.mode-row{margin:0 25px}.view-badge{display:none}.worlds-page{grid-template-columns:minmax(0,1fr) 330px;margin:0 25px}.worlds-left{padding-right:20px}.inspector{padding:22px 20px}.scene-stage{height:430px}.stage-heading{left:18px;top:18px}.stage-heading h2{font-size:27px}.stage-heading .eyebrow{max-width:200px}.planet-button{min-width:50px}.transport #sim-day,.time-control label{display:none}.transport-right{gap:6px}.learning-bridge{padding:15px 13px;gap:10px;flex-wrap:wrap}.learning-bridge button{margin-left:40px;min-height:26px}.learning-bridge strong{font-size:11px}.content-page{padding:30px 25px 40px}.origin-elements{grid-template-columns:repeat(6,1fr)}.origin-timeline{display:flex;overflow-x:auto;gap:8px;padding-bottom:6px;scrollbar-width:thin}.origin-timeline button{flex:0 0 170px}.origin-timeline button{padding:12px}.origin-timeline button strong{font-size:17px}}
@media(max-width:900px){.breadcrumb{display:none}.worlds-page{grid-template-columns:minmax(0,1fr) 300px;margin:0 18px}.mode-row{margin:0 18px}#learning-modes{gap:20px}#learning-modes button{font-size:11px}.worlds-left{padding-right:16px}.inspector{padding:22px 16px}.scene-stage{height:405px}.world-emblem{width:58px;height:68px;font-size:30px}.world-heading{gap:12px}.world-heading h2{font-size:27px}.stage-heading .eyebrow{display:none}.scene-toolbar .view-switch button{font-size:9px;padding:7px 8px}.scene-toolbar #tour{font-size:10px}.view-caption{left:18px;right:18px;flex-direction:column;gap:6px;bottom:15px}.ingredient-ribbon{left:18px;bottom:62px}.render-mode{display:none}.transport-right #fullscreen{display:none}.explorer-footer{font-size:8px}.explorer-footer>span:last-child{display:none}.origin-timeline{grid-template-columns:repeat(3,1fr)}.origin-feature{grid-template-columns:160px minmax(0,1fr);gap:24px;padding:23px}.origin-visual{height:190px;padding:20px;gap:8px}.origin-atom{width:50px;height:56px;font-size:23px}.composition-card{padding:21px}.comparison-grid{gap:16px}.composition-legend{grid-template-columns:1fr}.origin-elements{grid-template-columns:repeat(5,1fr)}}
@media(max-width:700px){.topbar{padding:15px 18px;min-height:77px}.brand{font-size:10px;gap:8px;letter-spacing:1.4px}.brand-mark{font-size:37px}.brand small{font-size:8px;letter-spacing:0}.header-tools{gap:10px}.header-tools .quiet-button{font-size:9px;max-width:60px;text-align:right;line-height:1.5}.header-tools .icon-button{width:36px;min-width:36px;height:36px}.intro{padding:25px 20px 19px}.intro .eyebrow{font-size:8px;letter-spacing:1.2px}h1{font-size:32px;max-width:340px;line-height:1.2}.intro p:last-child{font-size:12px;max-width:340px}.mode-row{margin:0 16px}#learning-modes{gap:21px;width:100%}#learning-modes button{font-size:11px;min-height:49px}#learning-modes button span{font-size:13px;margin-right:5px}.worlds-page{display:flex;flex-direction:column;margin:0 16px}.worlds-left{padding:17px 0 0}.scene-toolbar{margin-bottom:12px}.scene-toolbar .view-switch button{font-size:10px;padding:8px 10px}.scene-toolbar #tour{font-size:10px}.scene-stage{height:415px;min-height:350px}.stage-heading{top:19px;left:20px}.stage-heading .eyebrow{display:block;font-size:6px;max-width:205px}.stage-heading h2{font-size:28px}.stage-heading>span:last-child{font-size:9px}.stage-tools{top:17px;right:13px;gap:6px}.stage-tools .icon-button{height:33px;width:33px;min-width:33px;font-size:17px}.ingredient-ribbon button{font-size:14px;padding:7px 9px}.ingredient-ribbon button small{font-size:6px}.planet-button{min-width:58px;flex:0 0 58px;font-size:9px;padding:10px 5px}.planet-dock{gap:4px}.transport{padding:13px 0}.transport-right{gap:9px}.transport-right button{font-size:9px}.time-control{gap:7px}.time-control select{font-size:10px}.learning-bridge{margin-top:15px;padding:16px}.learning-bridge p span{font-size:11px}.learning-bridge strong{font-size:12px}.learning-bridge button{margin-left:43px}.explorer-footer{padding:19px 0;font-size:9px}.inspector{border:1px solid var(--line);border-radius:12px;padding:23px;margin-bottom:25px}.inspector-top{margin-bottom:20px}.world-emblem{width:70px;height:79px;font-size:34px}.world-heading h2{font-size:33px}.world-heading p{font-size:11px}.chemistry-story{font-size:14px;line-height:1.8;margin:22px 0}.inspector-tabs button{min-height:42px;font-size:12px}.material-row p,.formation-steps p,.layer-card p{font-size:12px}.material-row strong{font-size:13px}.origin-note p{font-size:12px}.origin-note .eyebrow{font-size:8px}.content-page{padding:27px 20px 40px}.section-intro h2{font-size:31px}.section-intro p{font-size:12px}.comparison-tabs{gap:6px}.comparison-tabs button{font-size:10px;padding:10px 12px}.comparison-grid{grid-template-columns:1fr}.composition-card{padding:23px}.composition-legend{grid-template-columns:repeat(2,1fr)}.basis-note{padding:16px;gap:11px}.basis-note p{font-size:11px}.origin-timeline{display:flex;overflow-x:auto;padding-bottom:8px;gap:9px;scrollbar-width:thin}.origin-timeline button{min-width:155px;flex:0 0 155px;min-height:117px;padding:15px}.origin-feature{grid-template-columns:1fr;gap:20px;padding:22px}.origin-visual{height:110px;padding:18px;flex-wrap:nowrap}.origin-atom{width:55px;height:61px}.origin-feature h3{font-size:26px}.origin-feature p{font-size:12px}.origin-elements{grid-template-columns:repeat(4,1fr);gap:9px}.element-tile{padding:10px;min-height:112px}.element-tile strong{font-size:29px}.element-tile span{font-size:10px}.element-tile em{font-size:7px}.origin-grid-heading h3{font-size:24px}.origin-grid-heading p{font-size:11px}.panel{top:85px;right:12px;width:min(310px,calc(100% - 24px));max-height:calc(100dvh - 105px)}dialog{padding:26px 23px}.dialog-ingredient-head{gap:15px}.dialog-ingredient-head h2{font-size:29px}.dialog-ingredient-head .element-emblem{min-width:75px;height:85px}.tour-progress{top:76px;right:13px;width:205px;padding:13px}.tour-progress .eyebrow{font-size:6px}.tour-progress p{font-size:10px}.scene-stage.expanded{inset:7px}.scene-stage.expanded .view-caption{bottom:20px}.scene-stage.expanded .ingredient-ribbon{bottom:70px}button.icon-button{min-height:36px}}
@media(max-width:380px){.composition-legend{grid-template-columns:1fr}.origin-elements{grid-template-columns:repeat(3,1fr)}.scene-toolbar .view-switch button{font-size:9px;padding:7px}.scene-stage{height:385px}.stage-heading .eyebrow{display:none}.view-caption{font-size:7px}.time-control{gap:4px}.transport-right{gap:5px}.inspector{padding:20px}.scene-toolbar #tour{font-size:9px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.loader-orbit{animation:none}}