/* Keep the lesson's visual theme scoped to this route. The shared navigation stays intact. */
.solar-page{background:#f8faff;color:#16213b}.solar-page main{overflow:clip}.solar-page h1,.solar-page h2,.solar-page h3{font-family:'DM Sans',sans-serif;line-height:1.18;letter-spacing:-.035em}.solar-page h2{font-size:clamp(1.8rem,4vw,2.65rem);margin:10px 0 24px}.solar-page h3{font-size:1.3rem;letter-spacing:-.02em}.space-intro{padding:28px 0 26px}.space-intro h1{font-size:clamp(2.6rem,7vw,4.4rem);margin:6px 0;letter-spacing:-.065em}.space-intro h1 em{font-style:normal;color:#6551dc}.space-intro p:last-child{margin:10px 0 0;color:#546179}.solar-page .eyebrow{font-size:.8rem;letter-spacing:.12em;font-weight:700;text-transform:uppercase;color:#6452bd}.observatory{color:#e8efff;background:#080f23;border:1px solid #263352;border-radius:24px;padding:20px;box-shadow:0 22px 60px #12214920}.sim-heading{display:flex;gap:14px;justify-content:space-between;font-size:.75rem;letter-spacing:.12em;color:#afbbd3;border-bottom:1px solid #273047;padding-bottom:14px}.sim-heading #sim-status{letter-spacing:0;text-align:right}.sim-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:16px}.scene-column{min-width:0}#solar-scene{display:block;width:100%;aspect-ratio:1.35;height:auto;touch-action:pan-y;cursor:pointer}.sim-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 0 18px}.sim-controls button,.sim-controls select{background:#1d2942;border:1px solid #415273;color:#f4f7ff;border-radius:9px;min-height:44px;font:600 .875rem 'DM Sans',sans-serif;padding:8px 12px}.sim-controls button{cursor:pointer}.sim-controls #play{background:#a7d5fc;color:#101b2e;border-color:#a7d5fc;min-width:78px}.sim-controls label{font-size:.875rem;display:flex;align-items:center;gap:6px}.sim-controls .check{min-height:44px}.sim-controls input{width:18px;height:18px;accent-color:#a7d5fc}.solar-page :focus-visible{outline:3px solid #8d71ef;outline-offset:4px}.observatory :focus-visible{outline-color:#ffcf78}.planet-inspector{min-width:0;align-self:center;padding:12px 18px 22px;background:#111c32;border:1px solid #2a3650;border-radius:18px;margin-block:18px}.portrait{height:185px;display:grid;place-items:center}.portrait canvas{width:240px;max-width:100%;height:auto}.planet-inspector .eyebrow{font-size:.75rem;color:#b5c5e4;letter-spacing:.07em}.planet-inspector h2{font-size:2rem;margin:6px 0 12px}.planet-inspector p{font-size:.9375rem;color:#c4cee0;line-height:1.6}.planet-inspector dl{margin:20px 0 0}.planet-inspector dl div{display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px;border-top:1px solid #2b3850;padding:8px 0;font-size:.875rem}.planet-inspector dt{color:#aebbd1}.planet-inspector dd{font-weight:700;margin:0}.planet-picker{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:6px;border-top:1px solid #28324a;padding-top:18px}.planet-picker button{min-height:54px;min-width:0;padding:8px 3px;background:#121d33;border:1px solid #38465f;color:#dce5f6;border-radius:10px;font:600 .875rem 'DM Sans',sans-serif;cursor:pointer}.planet-picker button[aria-pressed=true]{border-color:#a7d5fc;background:#253b58;color:white}.planet-picker button span{display:block;font-size:.75rem;color:#a9b8d1;margin-bottom:3px}.sim-hint{font-size:.875rem;color:#b5c2d8;margin:16px 0 10px}.model-note{border-top:1px solid #28324a;padding-top:12px;color:#b5c2d8;font-size:.875rem}.model-note summary{color:#dce6f8;cursor:pointer;min-height:32px}.fallback{padding:16px;border:1px solid #c8a165}.solar-toc{display:flex;flex-wrap:wrap;gap:10px 26px;padding:30px 0;border-bottom:1px solid #dfe5f1}.solar-toc a{text-decoration:none;font-size:.875rem;font-weight:700;min-height:32px}.lesson{padding-block:64px;scroll-margin-top:20px}.lesson p{line-height:1.8}.lesson-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}.concept-box{background:#edf2fc;border:1px solid #dce3f2;border-radius:18px;padding:24px}.concept-box h3{margin-top:0}.concept-box p:last-child{margin-bottom:0}.source{font-size:.875rem;color:#596682}.source a{color:inherit}.planet-lesson{background:#eef2fa}.lesson-lead{max-width:750px}.family-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:28px 0}.family-grid article{padding:24px;background:white;border:1px solid #dce3f2;border-radius:18px}.family-grid article>span{font-size:.875rem;letter-spacing:.12em;color:#6452bd;font-weight:700}.family-grid h3{margin:14px 0}.family-grid p{margin:0}.planet-facts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:30px 0}.planet-facts details{border:1px solid #d2dceb;border-radius:10px;background:white;padding:16px}.planet-facts summary{font-weight:700;cursor:pointer;min-height:32px}.planet-facts summary span{font-size:.8rem;font-weight:400;margin-left:8px;color:#596682}.table-scroll{max-width:100%;overflow:auto;border:1px solid #ced8e9;border-radius:14px;background:white}.table-scroll table{border-collapse:collapse;width:100%;font-size:.9375rem}.table-scroll th,.table-scroll td{text-align:left;padding:14px 18px;border-bottom:1px solid #dfe5ef;white-space:nowrap}.table-scroll thead{background:#e0e7f5}.try-it{padding:26px;border-left:4px solid #7562cc;background:#f0edfb;margin-top:26px;border-radius:0 14px 14px 0}.try-it ol{padding-left:22px}.try-it li{padding:6px 0}.misconception{margin-top:32px;padding-left:24px;border-left:4px solid #d19838}.space-band{background:#101a31;color:#e9eefb}.space-band .eyebrow{color:#a7c9ef}.space-band .family-grid article{background:#19263e;border-color:#344059}.space-band .source{color:#b9c5dd}.pluto-note{padding-top:18px;border-top:1px solid #38465d}.solar-page fieldset{border:1px solid #d7dfed;border-radius:14px;margin:24px 0;padding:20px}.solar-page legend{font-weight:700;padding:0 8px}.solar-page fieldset label{display:flex;align-items:baseline;gap:12px;min-height:46px;padding:10px;border-radius:8px;cursor:pointer}.solar-page fieldset label:hover{background:#eef2fa}.solar-page fieldset input{accent-color:#6551dc}.answer{color:#34486c;margin:10px 0 0}.answer:empty{display:none}#quiz-result{font-weight:700;font-size:1.125rem}.next-step{background:#eae7fa;padding:28px;border-radius:18px;margin-top:36px}.credits{padding-bottom:48px;color:#58647a;font-size:.875rem}.credits h2{font-size:1.3rem}.solar-page button:disabled,.solar-page select:disabled{opacity:.55;cursor:default}
/* Reflow the inspection panel below the full-width orbit view on narrow screens. */
@media(max-width:900px){.sim-layout{grid-template-columns:1fr}.planet-inspector{display:grid;grid-template-columns:200px 1fr;align-items:center;margin:0 0 18px;gap:20px}.portrait{height:auto}.planet-inspector dl{margin-top:12px}.planet-picker{grid-template-columns:repeat(5,minmax(0,1fr))}#solar-scene{aspect-ratio:1.5}.family-grid{grid-template-columns:1fr}.family-grid article{padding:20px}}
@media(max-width:560px){.space-intro{padding:20px 0}.space-intro .eyebrow{font-size:.75rem}.observatory{padding:12px;border-radius:18px}.sim-heading{font-size:.7rem;gap:10px}.sim-heading span:first-child{max-width:120px}#solar-scene{aspect-ratio:1}.sim-controls{gap:8px}.sim-controls label{font-size:.8rem}.sim-controls select{padding:8px}.planet-inspector{grid-template-columns:1fr;padding:16px;gap:0}.portrait{height:155px}.portrait canvas{width:205px}.inspector-copy .eyebrow{margin-top:10px}.planet-inspector h2{margin:5px 0 8px}.planet-inspector p{margin-block:8px}.planet-picker{grid-template-columns:repeat(3,minmax(0,1fr))}.planet-picker button{min-height:48px}.planet-picker button span{display:inline;margin-right:6px}.lesson{padding-block:44px}.lesson-grid,.planet-facts{grid-template-columns:1fr}.solar-toc{gap:8px 16px;padding-block:24px}.solar-page fieldset{padding:14px}.credits{padding-bottom:30px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Wrap share actions on phones; retain a 44px minimum touch target. */
.tutorial-share{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.tutorial-share button,.tutorial-share a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border:1px solid #cbd5e5;border-radius:10px;background:#fff;color:#293956;font:600 .875rem 'DM Sans',sans-serif;text-decoration:none;cursor:pointer}
.tutorial-share #share-tutorial{background:#5b4bdb;color:#fff;border-color:#5b4bdb}
.tutorial-share button:hover,.tutorial-share a:hover{filter:brightness(.94)}
.tutorial-share [hidden],.manual-share[hidden]{display:none}
.space-intro .share-feedback{font-size:.875rem;color:#34496a;margin:8px 0 0}
.share-feedback:empty{display:none}
.manual-share{margin-top:12px;max-width:540px}
.manual-share label{display:block;font-size:.875rem;margin-bottom:6px}
.manual-share input{width:100%;min-width:0;min-height:44px;font:inherit;border:1px solid #b2c0d6;border-radius:8px;padding:10px;background:#fff;color:#16213b}