:root{color-scheme:dark;--bg:#090d18;--panel:#121827;--text:#eff2ff;--muted:#93a0ba;--blue:#82caff;--purple:#b5a1ff;--line:#ffffff15}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 80% 0,#28233f60,transparent 45%),var(--bg);color:var(--text);font:14px/1.6 Arial,Helvetica,sans-serif}button,input,select{font:inherit}button{cursor:pointer}button,a,input,select,summary{ -webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:4px}button:disabled{opacity:.35;cursor:default}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}[hidden]{display:none!important}.site-header,.wrap{max-width:1680px;margin:auto;padding:0 30px}.site-header{height:93px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:27px;font-weight:900;letter-spacing:2px;line-height:1.1;color:var(--text)}.brand span{background:linear-gradient(100deg,#70bfff,#bd83fa);background-clip:text;color:transparent}.brand small{display:block;font-size:11px;letter-spacing:2px;color:#97a2bb;margin-top:10px}.site-header nav{display:flex;gap:30px;font-size:14px}.intro{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:30px 0 26px}.eyebrow{font-size:13px;letter-spacing:1.8px;font-weight:700;color:var(--blue);margin:0}h1{font-size:54px;letter-spacing:-2px;line-height:1.1;margin:12px 0}h1 em{font-style:normal;background:linear-gradient(100deg,#8ac8ff,#b29fff,#d5acff);background-clip:text;color:transparent}.intro>div>p:last-child{font-size:14px;color:#a8b4ce;margin:12px 0 0}.intro-note{padding-left:25px;border-left:1px solid #a89ffb44}.intro-note>span{font-size:12px;letter-spacing:1.5px;color:#9d9bbd}.intro-note>p{font-size:13px!important}.workspace{display:grid;grid-template-columns:190px minmax(0,1fr) 345px;gap:17px;align-items:start}.world-nav{border:1px solid var(--line);border-radius:13px;background:#101624;padding:16px 12px;position:sticky;top:15px}.nav-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 2px}.nav-heading .eyebrow{font-size:11px;letter-spacing:1px}.nav-heading button{border:0;background:none;color:#9faecb;font-size:20px;line-height:1}.search{display:block;margin:12px 0 14px}.search input{width:100%;min-width:0;background:#090f1c;border:1px solid #8395bd30;border-radius:7px;padding:10px;color:#d3def7;font-size:14px}.world-list{max-height:670px;overflow:auto;padding-right:4px;scrollbar-width:thin;scrollbar-color:#4b4d70 transparent}.world-row{display:flex;align-items:center;gap:4px;margin-bottom:5px}.world-row>.world-button{flex:1}.world-button{display:flex;align-items:center;gap:10px;text-align:left;width:100%;background:transparent;border:1px solid transparent;border-radius:7px;padding:9px 7px;color:#b6c2dd;font-size:13px;min-height:41px;transition:background .15s,border-color .15s}.world-button:hover{background:#26304b75;border-color:#ffffff14}.world-button.active{background:#292c4b;border-color:#aa9eff65;color:#eee7ff}.world-dot{height:17px;width:17px;background:var(--world-color);border-radius:50%;flex-shrink:0;box-shadow:inset -4px -2px 6px #0005}.world-button .name{flex:1}.world-button small{font-size:11px;color:#8c97af;display:block}.expand-moons{width:22px;background:none;border:0;color:#7787a5;font-size:14px;padding:0;min-height:36px}.moon-list{padding-left:15px;margin-bottom:10px;border-left:1px solid #68779235;margin-left:14px}.moon-list .world-button{font-size:14px;min-height:33px;padding:6px}.moon-list .world-dot{width:10px;height:10px}.nav-foot{font-size:12px;color:#8795b1;border-top:1px solid var(--line);padding:15px 4px 0;margin-top:14px;line-height:1.8}.nav-foot small{display:block;font-size:12px;color:#677894;margin-top:8px}.tiny-dot{display:inline-block;background:#a99bff;width:5px;height:5px;border-radius:50%;margin-right:5px}.observatory{border:1px solid #8195bc26;border-radius:14px;overflow:hidden;background:#0c111e}.scene-top{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px;border-bottom:1px solid var(--line)}.scene-views{display:flex;background:#131a2a;border:1px solid #ffffff0c;border-radius:7px;padding:3px;gap:2px}.scene-views button{font-size:13px;background:none;border:0;border-radius:5px;padding:8px 10px;color:#9bacc9}.scene-views button.active{background:#302d4b;color:#e0d4ff}.quiet-button{background:none;border:0;color:#8ea6cb;font-size:13px;padding:5px;white-space:nowrap}.stage{position:relative;background:#050912;height:570px;overflow:hidden;touch-action:none}.scene-title{position:absolute;z-index:2;left:22px;top:20px;pointer-events:none}.scene-title .eyebrow{font-size:11px;letter-spacing:1.5px}.scene-title h2{font-size:23px;letter-spacing:-.5px;font-weight:500;margin:8px 0 5px}.scene-title p{font-size:12px;color:#7c8caa;margin:0}.stage canvas{display:block;width:100%;height:100%;touch-action:none}.stage-bottom{position:absolute;left:18px;right:18px;bottom:15px;display:flex;align-items:flex-end;justify-content:space-between;gap:14px;pointer-events:none;font-size:11px;color:#7b8daa}.stage-bottom>span:first-child{max-width:80%;background:#05091290;padding:2px 5px;border-radius:3px}.stage-bottom>span:last-child{font-size:10px;letter-spacing:1px;color:#687393}.zoom-controls{position:absolute;right:13px;bottom:50px;display:flex;flex-direction:column;gap:4px;z-index:4}.zoom-controls button{border:1px solid #7790b53d;background:#0e1627cc;color:#bcd5f7;border-radius:5px;height:30px;width:31px;font-size:16px}.world-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}.world-label{position:absolute;font-size:12px;color:#a9bedc;white-space:nowrap;transform:translate(-50%,0);text-shadow:0 1px 4px #000,0 0 5px #000;background:#05091266;padding:1px 4px;border-radius:3px;line-height:1.3}.world-label.selected{color:#e6d6ff}.world-labels .world-label{pointer-events:auto;border:0;cursor:pointer;font-family:inherit}.comparison-labels{position:absolute;bottom:38px;left:10%;right:10%;display:flex;justify-content:space-around;gap:20px;text-align:center;pointer-events:none}.comparison-labels strong{display:block;color:#d5e3ff;font-size:13px}.comparison-labels span{display:block;font-size:12px;color:#8f9fbd}.scene-controls{display:flex;align-items:center;gap:11px;flex-wrap:wrap;padding:13px;background:#121929;border-top:1px solid #ffffff10}.play-button{border:1px solid #a79afc55;color:#e6deff;background:#332b50;border-radius:6px;padding:9px 12px;font-size:14px;min-width:82px}.scene-controls>label{font-size:11px;letter-spacing:.3px;color:#8f9fbb;display:flex;flex-direction:column;gap:4px}.scene-controls select{background:#0b1222;border:1px solid #7286a742;border-radius:5px;padding:6px;color:#bbcae7;font-size:12px;max-width:152px}.scene-controls .check{flex-direction:row;align-items:center;font-size:12px;gap:5px;margin-top:13px}.check input{accent-color:#ad9cfa}.scene-help{font-size:12px;color:#7d8da9;line-height:1.7;margin:0;padding:11px 15px;background:#0f1524;border-top:1px solid #ffffff09}.detail-panel{border:1px solid var(--line);background:#111726;border-radius:13px;overflow:hidden}.detail-head{display:flex;padding:20px 18px 16px;justify-content:space-between;gap:10px}.detail-head .eyebrow{font-size:11px;letter-spacing:1px}.detail-head h2{font-size:30px;line-height:1.1;letter-spacing:-.9px;margin:9px 0}.detail-head p{font-size:13px;color:#9baac6;margin:10px 0 0;max-width:250px}.detail-arrows{display:flex;gap:3px;align-self:flex-start}.detail-arrows button{width:25px;height:25px;border:1px solid #ffffff17;background:#1b2234;color:#a7b9d6;border-radius:5px;font-size:13px;padding:0}.detail-tabs{display:flex;gap:0;justify-content:space-around;border-top:1px solid #ffffff0d;border-bottom:1px solid #ffffff12;padding:0 10px}.detail-tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:13px 4px;color:#8e9cba;font-size:12px;white-space:nowrap}.detail-tabs button.active{border-bottom-color:#b1a0fa;color:#e3d6ff}.tab-body{padding:17px}.hero-photo{border-radius:8px;overflow:hidden;background:#080d18;position:relative}.hero-photo img{display:block;width:100%;height:177px;object-fit:cover}.hero-photo .credit{display:block;font-size:10px;line-height:1.5;color:#7e91af;padding:8px 9px}.world-summary{font-size:14px;line-height:1.8;color:#b1bfd9;margin:17px 0}.quick-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:17px 0}.quick-stats>div{background:#192034;border:1px solid #ffffff0d;border-radius:7px;padding:11px}.quick-stats span{display:block;font-size:11px;letter-spacing:.5px;color:#8498b9}.quick-stats strong{display:block;font-size:15px;color:#cbdcf7;margin-top:5px;line-height:1.5}.world-actions{display:flex;flex-direction:column;gap:8px}.primary,.secondary{border-radius:7px;font-size:13px;padding:11px 12px;text-align:left}.primary{background:#b2a1fa;border:1px solid #b2a1fa;color:#1a1530;font-weight:700}.secondary{background:#24243c;border:1px solid #9d91e540;color:#c9bff0}.primary:hover{background:#c5b7ff}.secondary:hover{background:#302c4b}.parent-link{font-size:13px;display:block;margin:14px 0 0}.property-grid{display:grid;grid-template-columns:1fr;gap:10px;margin:15px 0}.property-grid>div{padding:13px;background:#182033;border:1px solid #ffffff0e;border-radius:8px}.property-grid dt{font-size:18px;color:var(--blue)}.property-grid dd{font-size:19px;margin:7px 0 4px;color:#dbe7ff;line-height:1.5}.property-grid small{display:block;font-size:12px;color:#899dbd;line-height:1.7}.small-copy{font-size:13px;line-height:1.8;color:#8e9fbc}.discover-note{padding:16px 0;border-bottom:1px solid var(--line)}.discover-note:last-child{border:0}.discover-note h3{font-size:16px;margin:0 0 9px;color:#d6e1f6;font-weight:500}.discover-note p{font-size:14px;color:#98accb;line-height:1.85;margin:0}.detail-footer{border-top:1px solid var(--line);padding:14px 17px;display:flex;gap:10px;flex-wrap:wrap;font-size:12px}.detail-footer span{color:#6f809c;font-size:11px}.moon-card{display:flex;align-items:center;gap:13px;width:100%;padding:11px 0;background:none;border:0;border-bottom:1px solid var(--line);text-align:left;color:#c7d7ef}.moon-card img,.moon-card .moon-placeholder{width:56px;height:56px;object-fit:cover;border-radius:50%;background:#1f273b;flex-shrink:0}.moon-card strong{display:block;font-size:13px}.moon-card small{display:block;font-size:12px;color:#8297b8;line-height:1.7}.moon-card .arrow{margin-left:auto;color:#a99ce6}.no-moons{padding:18px 0;color:#a5b6d1;font-size:13px;line-height:1.9}.notes{display:flex;align-items:flex-start;justify-content:space-between;gap:30px;padding:25px 0 35px;margin-top:28px;border-top:1px solid var(--line);font-size:13px;color:#7185a3}.notes details{max-width:1000px}.notes summary{cursor:pointer;color:#a3b4d1}.notes details p{line-height:1.9}.notes>p{white-space:nowrap;margin:0;font-size:12px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.nav-collapsed .world-list,.nav-collapsed .search,.nav-collapsed .nav-foot{display:none}.nav-collapsed .world-nav{position:static}.photo-fallback{padding:25px;font-size:13px;color:#91a5c6;text-align:center;min-height:100px}
@media(min-width:1550px){.workspace{grid-template-columns:205px minmax(0,1fr) 370px}.stage{height:640px}.world-list{max-height:760px}.hero-photo img{height:190px}.detail-tabs button{font-size:13px}}
@media(max-width:1200px){.workspace{grid-template-columns:170px minmax(0,1fr);gap:15px}.detail-panel{grid-column:2;display:grid;grid-template-columns:1fr}.world-nav{grid-row:1/3}.stage{height:540px}.detail-tabs{justify-content:flex-start;gap:25px;padding:0 18px}.detail-tabs button{font-size:14px}.detail-head h2{font-size:33px}.tab-body{padding:22px}.hero-photo img{height:250px;object-fit:contain}.quick-stats{grid-template-columns:repeat(4,1fr)}.world-actions{flex-direction:row}.property-grid{grid-template-columns:repeat(2,1fr)}.world-summary{max-width:850px}.intro-note{display:none}.world-list{max-height:76vh}}
@media(max-width:750px){.site-header,.wrap{padding-left:16px;padding-right:16px}.site-header{height:83px}.brand{font-size:23px}.brand small{font-size:10px}.site-header nav{gap:14px;font-size:12px}.intro{padding:25px 0 23px}h1{font-size:43px}.intro .eyebrow{font-size:11px;letter-spacing:1.2px}.intro>div>p:last-child{font-size:14px}.workspace{grid-template-columns:1fr;gap:14px}.world-nav{position:static;grid-row:auto;padding:13px}.world-list{display:flex;overflow:auto;max-height:170px;flex-wrap:wrap;gap:3px 8px;padding:0}.world-row{min-width:115px;width:auto;flex:1;margin-bottom:0}.world-button{font-size:14px;padding:7px 5px}.world-dot{width:14px;height:14px}.world-button small{font-size:10px}.moon-list{display:flex;flex-wrap:wrap;gap:4px;width:100%;padding:8px;margin:4px 0 6px;max-height:120px;overflow:auto;border:1px solid #ffffff13;border-radius:6px}.moon-list .world-button{width:auto;min-height:35px;flex:1;min-width:100px}.nav-foot{display:none}.search{margin:8px 0}.search input{padding:8px}.detail-panel{grid-column:auto}.scene-top{padding:10px;flex-wrap:wrap}.scene-views{flex:1}.scene-views button{flex:1;padding:8px 6px;font-size:12px}.quiet-button{font-size:12px}.stage{height:480px}.scene-title{left:16px;top:16px}.scene-title h2{font-size:21px}.scene-title p{font-size:11px;max-width:245px}.scene-controls{gap:10px;padding:12px}.scene-controls select{font-size:12px;max-width:145px}.scene-controls .check{margin-top:10px}.stage-bottom{font-size:10px;left:12px;right:12px;bottom:12px}.stage-bottom>span:last-child{display:none}.stage-bottom>span:first-child{max-width:90%}.world-label{font-size:11px}.scene-help{font-size:12px}.detail-tabs{gap:15px;padding:0 14px;justify-content:space-between}.detail-tabs button{font-size:12px}.detail-head{padding:18px}.detail-head h2{font-size:31px}.detail-head p{font-size:14px;max-width:100%}.tab-body{padding:18px}.hero-photo img{height:220px}.quick-stats{grid-template-columns:1fr 1fr}.world-actions{flex-direction:column}.property-grid{gap:8px}.property-grid dt{font-size:18px}.property-grid dd{font-size:17px}.notes{display:block}.notes>p{margin-top:20px}.intro-note{display:none}.comparison-labels{left:3%;right:3%;gap:10px}.comparison-labels strong{font-size:14px}}
@media(prefers-reduced-motion:reduce){.world-button{transition:none}}

#renderer{position:absolute;inset:0}

/* Align the time reset with the select inputs; keep a compact date readout. */
.scene-controls #restart-time{align-self:flex-end;min-height:32px;padding:6px 0;display:flex;align-items:center}
.scene-controls #restart-time[hidden]{display:none}
.simulation-date{margin:0;padding:10px 15px 0;background:#0f1524;color:#a8bddc;font-size:13px;line-height:1.6;font-variant-numeric:tabular-nums}
.simulation-date+.scene-help{border-top:0;padding-top:6px}
.composition-card{border:1px solid #a89ae32b;background:#171f32;border-radius:9px;padding:15px;margin:5px 0 20px}
.composition-card h3{font-size:19px;color:var(--blue);font-weight:500;margin:0 0 14px}
.composition-card h4{font-size:15px;color:#d6e1f6;margin:14px 0 5px;font-weight:500}
.composition-card p{font-size:14px;color:#acbcd7;line-height:1.8;margin:0 0 10px}
.element-chips{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 14px}
.element-chips span{border:1px solid #8ca9dc3b;border-radius:5px;padding:4px 7px;font-size:13px;color:#c5d5f1;background:#202941}
.composition-card .composition-source{font-size:13px;line-height:1.6;display:block;margin-top:10px}

/* Every control group shares the same caption row and 38px input row. */
.scene-controls{align-items:flex-end;gap:12px}
.scene-controls>label,.scene-controls>.time-actions,.scene-controls>.visibility-controls,.scene-controls>.current-time-control{display:grid;grid-template-rows:18px 38px;gap:5px;align-items:stretch}
.scene-controls .control-caption,.scene-controls>label{font-size:13px;color:#8f9fbb;letter-spacing:.2px;line-height:18px}
.scene-controls .control-row{height:38px;display:flex;align-items:center;gap:6px}
.scene-controls select{height:38px;box-sizing:border-box;margin:0;padding:6px 9px;font-size:14px;line-height:normal}
.scene-controls .play-button,.scene-controls .step-button,.scene-controls #restart-time{height:38px;min-height:38px;box-sizing:border-box;margin:0;align-self:auto;display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;line-height:1;white-space:nowrap}
.scene-controls .step-button{background:#1d263c;border:1px solid #8ca9dc44;color:#c9d8f1;border-radius:6px;font-size:13px;min-width:33px}
.scene-controls .step-button:hover{background:#303a54}
.scene-controls .check{height:38px;margin:0;padding:0;display:inline-flex;align-items:center;gap:5px;line-height:1;font-size:14px}
.scene-controls .check input{margin:0;width:14px;height:14px}
.scene-controls #restart-time{font-size:14px;padding-left:0;padding-right:0}
.scene-controls [hidden],.scene-controls>[hidden],.scene-controls #restart-time[hidden]{display:none!important}
.earth-sun-note{margin:0;padding:4px 15px;background:#0f1524;color:#b5c6dc;font-size:13px;line-height:1.6}
.earth-sun-note[hidden]{display:none}
.material-section{padding:0 0 17px;margin-bottom:18px;border-bottom:1px solid #8ca9dc25}
.composition-card .material-section h4{color:var(--blue);font-size:18px;margin-top:0}
.composition-card h5{font-size:13px;color:#b9cdeb;font-weight:500;margin:14px 0 7px;line-height:1.6}
.composition-card h5.inferred-heading{color:#cbb7e8}
.element-chips.inferred span{border-color:#b49ad855;border-style:dashed;background:#29223d;color:#d2c1e9}
.composition-card .evidence-empty{font-size:13px;color:#8f9fbb;font-style:italic}
@media(max-width:750px){.scene-controls{gap:10px 12px}.scene-controls select{max-width:160px}.scene-controls .control-row{gap:5px}.scene-controls .play-button{min-width:76px}.scene-controls .check{font-size:13px}}