.sf-intro,.sf-explorer{max-width:1320px;margin-inline:auto}.sf-intro{padding:55px 30px 34px}.sf-breadcrumb{display:flex;gap:14px;align-items:center;font:11px var(--mono,monospace);letter-spacing:.08em;margin-bottom:30px;color:#9bb1b7}.sf-breadcrumb a{text-decoration:none}.sf-intro h1{font-size:clamp(54px,7vw,94px);line-height:1.04;margin:15px 0 6px}.sf-intro h1 em{color:#d9a578}.sf-intro .sf-deck{font-family:Georgia,serif;font-size:26px;color:#d4dde0;margin:16px 0}.sf-intro>p:last-child{max-width:720px;color:#a5b7bd;font-size:18px;line-height:1.7}.sf-explorer{border:1px solid #273944;background:#0b151e;margin-bottom:50px}.sf-topbar{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;gap:20px;border-bottom:1px solid #2a3b45}.sf-topbar>a{font-size:12px;color:#a9bbc0}.sf-mode{display:flex;gap:8px}.sf-explorer button,.sf-explorer select,.sf-explorer input[type=number]{font:inherit}.sf-explorer button{border:1px solid #354953;background:#101f29;color:#dce4e4;padding:11px 15px;cursor:pointer;border-radius:3px;font-size:13px;min-height:42px}.sf-explorer button[aria-pressed=true]{border-color:#ce986d;background:#342921;color:#ffddb7}.sf-explorer button:focus-visible,.sf-explorer input:focus-visible,.sf-explorer select:focus-visible{outline:2px solid #b5dedb;outline-offset:4px}.sf-explorer button:hover{border-color:#d3a375}.sf-explorer [hidden]{display:none!important}.sf-stage{position:relative;height:clamp(340px,42vw,560px);background:#050b14;overflow:hidden;touch-action:none;isolation:isolate;cursor:grab}.sf-stage:active{cursor:grabbing}.sf-stage canvas{position:absolute;inset:0;display:block;width:100%;height:100%}.sf-stage .sf-initial{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:.65}.sf-stage[data-ready=true] .sf-initial{display:none}.sf-coordinate{position:absolute;top:23px;left:26px;pointer-events:none;max-width:75%;z-index:2}.sf-coordinate span,.sf-coordinate 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.eyebrow{display:block;font-size:10px;color:#abbbb9;letter-spacing:.1em;max-width:500px;line-height:1.6}.sf-clock output{display:block;margin-top:7px;font:clamp(20px,2.8vw,33px) Georgia,serif;font-variant-numeric:tabular-nums;min-height:40px;color:#f0dcc0;white-space:normal}.sf-playback{display:flex;gap:8px;flex-shrink:0}.sf-playback button:first-child{background:#c09168;border-color:#c09168;color:#09141b;min-width:150px;font-weight:700}.sf-stars{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;padding:0 26px 18px;background:#101e29}.sf-stars>div{border-left:2px solid #9ab8c0;padding:8px 13px;min-width:0}.sf-stars>div:first-child{border-color:#d5a275}.sf-stars span,.sf-stars small{display:block;color:#94aab5;font-size:11px}.sf-stars span{letter-spacing:.1em;margin-bottom:6px;font-family:monospace}.sf-stars strong{display:block;font-size:15px;color:#e5e6df;min-height:22px;line-height:1.5}.sf-stars 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input[type=number]{width:75px;min-width:75px;color:#e9e4d9;background:#0b1720;border:1px solid #3b535d;border-radius:3px;padding:9px}.sf-controls small{display:block;font-size:11px;color:#9bafb4;line-height:1.6;margin-top:10px}.sf-choice select{width:100%;max-width:100%;background:#10222d;border:1px solid #3a515d;border-radius:3px;padding:11px 8px;color:#e0e8e6;font-size:12px;min-height:42px}.sf-explorer input:disabled,.sf-explorer select:disabled{opacity:.55;cursor:default}.sf-presets{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:0 26px 24px}.sf-presets>span{font:10px monospace;color:#91abb3;margin-right:5px}.sf-presets button{font-size:12px}.sf-caption{display:grid;grid-template-columns:1fr auto;gap:35px;padding:23px 26px;background:#10202a;border-top:1px solid #2a3c47}.sf-caption p{margin:0;color:#c2d0d2;line-height:1.7;font-size:14px;max-width:790px}.sf-caption .eyebrow{font-size:10px;color:#c2966b;letter-spacing:.1em;margin-bottom:8px}.sf-caption p.sf-guide-note{color:#8fa8af;font-size:11px;margin-top:9px}.sf-camera-tools{display:flex;flex-wrap:wrap;align-content:start;max-width:240px;gap:7px}.sf-camera-tools button{padding:8px 10px;font-size:11px;flex:1}.sf-camera-tools label{width:100%;font-size:12px;color:#aec2c8;margin-top:10px;display:flex;align-items:center;gap:7px}.sf-budget{padding:16px 26px;background:#111e28;border-top:1px solid #293b46}.sf-budget span{font:10px monospace;color:#c39b72;display:block;margin-bottom:7px}.sf-budget output{color:#c2d0d2;font-size:12px;font-variant-numeric:tabular-nums}.sf-research-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.sf-research-grid article,.sf-reading-grid article{background:#0c1821;border:1px solid #293b45;padding:28px}.sf-research-grid h3,.sf-reading-grid h3{font:26px/1.2 Georgia,serif;color:#ede2cf;margin:15px 0}.sf-research-grid p,.sf-reading-grid p{font-size:14px;color:#a6bac0;line-height:1.8}.sf-research-grid .eyebrow,.sf-reading-grid .eyebrow{font-size:10px;color:#ca9b72;line-height:1.6}.sf-research-grid a,.sf-reading-grid a,.sf-sources a,.sf-far-future a{font-size:13px;color:#c6d8d8}.sf-far-future{margin-top:22px;border:1px solid #2b414b;padding:22px 26px;background:#101c25}.sf-far-future summary{font:20px/1.5 Georgia,serif;cursor:pointer;color:#e4d2b9}.sf-far-future p{font-size:14px;line-height:1.8;color:#a4b9bd;max-width:900px}.sf-reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.sf-reading-grid article{display:flex;flex-direction:column;padding:24px}.sf-reading-grid article a{margin-top:auto;padding-top:12px}.sf-sources ul{columns:2;column-gap:45px;padding-left:20px}.sf-sources li{break-inside:avoid;margin:0 0 15px;line-height:1.5}.sf-return{display:flex;justify-content:space-between;gap:35px;align-items:center;border-top:1px solid #293c47}.sf-return a{display:block;color:#bad2d6;padding:9px 0;font-size:14px}.atlas-bridge-stellar{background:radial-gradient(circle at 95% 20%,#75583b45,transparent 50%),#111e29}.sf-entry{display:flex;gap:28px;align-items:center;border:1px solid #344651;background:#10202a;padding:25px}.sf-entry img{width:38%;height:auto;max-width:400px}.sf-entry p{font-size:14px;line-height:1.7;color:#9bb1b8}.sf-entry h2{margin:8px 0;font-size:32px}
@media(min-width:1380px){.sf-explorer{margin-inline:auto}.sf-controls{grid-template-columns:1fr 1fr 1fr}}
@media(max-width:800px){.sf-intro{padding:35px 22px 20px}.sf-explorer{margin-inline:16px}.sf-stage{height:390px}.sf-controls,.sf-explorer[data-mode=binary] .sf-controls{grid-template-columns:1fr 1fr}.sf-clock{padding:18px}.sf-stars,.sf-timeline{padding-inline:18px}.sf-caption{grid-template-columns:1fr;gap:18px;padding:20px}.sf-camera-tools{max-width:none}.sf-camera-tools label{width:auto;margin:0 12px}.sf-reading-grid{grid-template-columns:1fr 1fr}.sf-topbar{align-items:flex-start;gap:10px;padding:14px}.sf-topbar>a{max-width:115px;font-size:10px;line-height:1.5}.sf-scene-tag{display:none}.sf-entry{flex-direction:column}.sf-entry img{width:100%}}
@media(max-width:520px){.sf-stage{height:340px}.sf-mode button{font-size:11px;padding:9px 10px}.sf-topbar>a{display:none}.sf-clock{flex-wrap:wrap;gap:9px}.sf-clock>div:first-child{width:100%}.sf-clock output{font-size:25px;min-height:32px}.sf-clock .eyebrow{font-size:9px}.sf-playback{width:100%}.sf-playback button{flex:1}.sf-stars{grid-template-columns:1fr 1fr;padding-bottom:15px;gap:12px}.sf-stars>div:first-child:last-child{grid-column:1/-1}.sf-stars strong{font-size:13px}.sf-stars>div{padding-left:9px}.sf-stars>div[data-sf-orbit-card]{grid-column:1/-1}.sf-controls,.sf-explorer[data-mode=binary] .sf-controls{grid-template-columns:1fr;padding:20px;gap:20px}.sf-presets{padding-inline:20px}.sf-presets>span{width:100%}.sf-chapters button{flex:auto;font-size:10px}.sf-research-grid,.sf-reading-grid{grid-template-columns:1fr}.sf-research-grid article{padding:23px}.sf-sources ul{columns:1}.sf-return{display:block}.sf-coordinate{left:18px;top:19px;max-width:74%}.sf-coordinate span{font-size:9px;line-height:1.7}.sf-coordinate small{font-size:8px;letter-spacing:.06em}.sf-watermark{left:18px;bottom:18px}.sf-zoom{right:12px;top:18px}.sf-breadcrumb{font-size:10px;gap:9px}.sf-caption p{font-size:13px}}
@media(prefers-reduced-motion:reduce){.sf-explorer *{scroll-behavior:auto}}

/* Reserve only the changing number; keep the time unit as one compact phrase. */
.sf-clock{flex-wrap:wrap}.sf-clock>div:first-child{flex:1 1 18rem;min-width:0;text-align:left}
.sf-clock output.sf-age-grid{display:grid;grid-template-columns:.7em auto auto auto;column-gap:.28em;align-items:baseline;justify-content:start;text-align:left;white-space:nowrap}
.sf-clock output.sf-age-compact{grid-template-columns:.7em auto auto}
.sf-age-grid [data-sf-age-number]{width:5ch;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-variant-numeric:tabular-nums;font-feature-settings:"tnum";text-align:right}
.sf-age-grid [data-sf-age-unit]{display:inline-flex;gap:.22em;align-items:baseline;white-space:nowrap}
.sf-age-grid .sf-age-prelude{grid-column:1/-1;white-space:normal}
@media(max-width:520px){.sf-clock output.sf-age-grid{font-size:clamp(20px,5.5vw,25px)}}

/* Help remains visible alongside the mode controls, including on phones. */
.sf-topbar{flex-wrap:wrap}.sf-topbar-links{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.sf-topbar-links a{font-size:12px;line-height:1.5;color:#b6cbd0;text-underline-offset:4px}
.sf-topbar-links .sf-help-link{display:inline-flex;align-items:center;min-height:44px;padding:10px 14px;border:1px solid #c29269;border-radius:3px;color:#ffdfba;background:#32291f;text-decoration:none;font-size:13px}
.sf-help-link:hover{border-color:#f0bf8d;background:#423224}.sf-help-link:focus-visible,.sf-help-topics a:focus-visible{outline:2px solid #b5dedb;outline-offset:4px}
.sf-help-topics{display:flex;flex-wrap:wrap;align-items:center;gap:2px 18px;padding:0 26px 16px}.sf-help-topics span{font:10px/1.6 monospace;letter-spacing:.08em;color:#91abb3}.sf-help-topics a{display:inline-flex;align-items:center;min-height:44px;font-size:12px;line-height:1.5;color:#b9d6d8;text-underline-offset:4px}
@media(max-width:800px){.sf-topbar-links{gap:8px 12px}.sf-topbar-links .sf-method-link{font-size:10px}}
@media(max-width:520px){.sf-topbar-links{width:100%}.sf-topbar-links .sf-help-link{justify-content:center;width:100%;font-size:12px}.sf-topbar-links .sf-method-link{padding:3px 0}.sf-help-topics{padding-inline:20px;gap:0 15px}.sf-help-topics span{width:100%}}