.sg-guide{--sg-pad:clamp(22px,4.5vw,72px);--sg-gap:clamp(32px,5vw,72px)}
.sg-hero{padding:34px var(--sg-pad) 64px;max-width:1600px;margin:auto}
.sg-breadcrumb{display:flex;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:12px;margin-bottom:55px}.sg-breadcrumb a{text-decoration:underline;text-underline-offset:4px}
.sg-hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:var(--sg-gap);align-items:center}.sg-hero-grid>div,.sg-hero-grid>figure{min-width:0}
.sg-hero h1{font:clamp(57px,6.7vw,102px)/1.02 var(--display);letter-spacing:-.052em;margin:25px 0}.sg-hero h1 em{color:var(--aqua);font-weight:400}.sg-deck{font-size:clamp(17px,1.5vw,22px);line-height:1.65;max-width:38ch;color:#c5d0ce}.sg-byline{display:flex;flex-wrap:wrap;gap:10px 25px;color:var(--muted);font-size:12px;line-height:1.6;margin:25px 0 32px}.sg-byline a{text-decoration:underline}
.sg-hero-diagram{margin:0}.sg-hero-diagram img{width:100%;height:auto}.sg-hero-diagram figcaption,.sg-figure figcaption{color:var(--muted);font-size:13px;line-height:1.65;margin-top:16px;max-width:75ch}
.sg-jump{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));padding:0 var(--sg-pad);max-width:1600px;margin:0 auto 16px}.sg-jump a{border-top:1px solid var(--line);padding:17px 8px 18px 0;display:flex;gap:10px;font-size:12px;line-height:1.4}.sg-jump a span{color:var(--copper);font-size:10px}.sg-jump a:hover{color:var(--aqua)}
.sg-section{padding:clamp(54px,6vw,90px) var(--sg-pad);max-width:1600px;margin:auto;border-top:1px solid var(--line);scroll-margin-top:24px}.sg-section h2{font:clamp(35px,4.5vw,66px)/1.08 var(--display);letter-spacing:-.04em;margin:15px 0 32px}.sg-section h2 em{font-weight:400;color:var(--aqua)}.sg-section h3{font:clamp(23px,2vw,31px)/1.2 var(--display);letter-spacing:-.02em}
.sg-reading{display:grid;grid-template-columns:minmax(240px,340px) minmax(0,1fr);gap:var(--sg-gap)}.sg-section-intro{align-self:start;min-width:0}.sg-prose{min-width:0;max-width:80ch}.sg-prose p{font-size:17px;line-height:1.85;color:#c8d2cf;margin-bottom:25px}.sg-prose>.text-link{line-height:1.6;white-space:normal}
.sg-citations{white-space:nowrap;font-size:.76em}.sg-citations a{color:var(--copper);text-decoration:underline;text-underline-offset:3px}.sg-figure{margin:32px 0}.sg-figure img{width:100%;height:auto;border:1px solid var(--line);background:#0c171e}
.sg-definition-grid,.sg-evidence-grid,.sg-open-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.sg-definition-grid>article,.sg-evidence-grid>article,.sg-open-grid>article{min-width:0;padding:28px;border:1px solid var(--line);background:var(--panel)}.sg-definition-grid p,.sg-evidence-grid p,.sg-open-grid p,.sg-note p,.sg-section-lead{font-size:16px;line-height:1.8;color:#c5cfcd}.sg-key{display:inline-block;font-size:12px;letter-spacing:.13em;border-bottom:3px solid;padding-bottom:8px;margin-bottom:20px}.sg-key-horizon{color:var(--copper)}.sg-key-photon{color:var(--aqua)}.sg-key-orbit{color:#c1afd9}
.sg-note{margin-top:30px;padding:25px 28px;border-left:3px solid var(--copper);background:#14232b}.sg-note strong{font-weight:500;color:var(--cream)}.sg-note p{max-width:105ch;margin:13px 0 0}.sg-section-lead{max-width:90ch;margin:20px 0 32px}.sg-evidence-grid>article>span,.sg-source-grid>article>span,.sg-reading-grid>a>span{font-size:10px;letter-spacing:.16em;color:var(--copper)}.sg-evidence-grid h3,.sg-open-grid h3{margin:20px 0}.sg-evidence-grid a{font-size:13px;text-decoration:underline;text-underline-offset:4px;line-height:1.65}
.sg-questions{max-width:1250px}.sg-questions details{border-top:1px solid var(--line);padding:0 4px}.sg-questions summary{font-size:18px;cursor:pointer;min-height:54px;padding:18px 0;color:var(--cream);line-height:1.6}.sg-questions details p{max-width:80ch;line-height:1.85;font-size:16px;color:#c5cfcd;padding:0 22px 18px}.sg-reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.sg-reading-grid>a{display:flex;flex-direction:column;padding:28px;border:1px solid var(--line);background:var(--panel);min-width:0;transition:border-color .2s,background .2s}.sg-reading-grid>a:hover{border-color:var(--copper);background:#17262e}.sg-reading-grid h3{margin:22px 0 18px}.sg-reading-grid p{font-size:15px;line-height:1.8;color:#bfcac7}.sg-reading-grid b{font-size:12px;font-weight:500;color:var(--aqua);margin-top:auto;padding-top:15px;line-height:1.6}
.sg-source-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:22px}.sg-source-grid article{min-width:0;padding:26px;border:1px solid var(--line);scroll-margin-top:25px}.sg-source-grid article:target{border:2px solid var(--copper);background:#1b292e;padding:25px}.sg-source-grid article:target>span{font-weight:700;color:#f2d2aa}.sg-source-grid h3{font-size:24px;margin:17px 0;overflow-wrap:anywhere}.sg-source-grid p{font-size:14px;line-height:1.8;color:var(--muted)}.sg-source-return{display:inline-block;text-decoration:underline;text-underline-offset:4px;font-size:12px;line-height:1.6;margin-top:7px}.sg-update-note{color:var(--muted);max-width:90ch;font-size:13px;line-height:1.8;margin:30px 0 0}.sg-guide :focus-visible{outline:2px solid var(--aqua);outline-offset:5px}
@media(min-width:960px) and (min-height:640px){.sg-section-intro{position:sticky;top:28px}}
@media(max-width:1100px){.sg-jump{grid-template-columns:repeat(4,minmax(0,1fr))}.sg-reading-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sg-definition-grid,.sg-evidence-grid,.sg-open-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}}
@media(max-width:959px){.sg-hero-grid,.sg-reading{grid-template-columns:1fr}.sg-hero h1{font-size:clamp(56px,9vw,88px)}.sg-hero h1 br:last-child{display:none}.sg-hero-diagram{max-width:580px;margin:auto}.sg-hero{padding-bottom:40px}.sg-section-intro h2{margin-bottom:0}.sg-prose{max-width:85ch}.sg-tool-live{grid-template-columns:1fr}.sg-source-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.sg-breadcrumb{margin-bottom:36px}.sg-jump{grid-template-columns:repeat(3,minmax(0,1fr))}.sg-jump a{font-size:11px;gap:7px}.sg-definition-grid,.sg-evidence-grid,.sg-open-grid,.sg-reading-grid,.sg-source-grid,.sg-slider-grid{grid-template-columns:1fr}.sg-presets{gap:8px}.sg-presets button{padding:12px 10px;font-size:12px}.sg-presets button span{font-size:11px;line-height:1.5}.sg-tool-controls{padding:17px}.sg-tool-live>div{padding:21px}.sg-prose p{font-size:16px}.sg-section{scroll-margin-top:15px}.sg-section h2{font-size:41px}.sg-section h3{font-size:26px}.sg-questions summary{font-size:17px}.sg-byline{flex-direction:column;gap:7px}}
@media(max-width:370px){.sg-jump{grid-template-columns:repeat(2,minmax(0,1fr))}.sg-presets{grid-template-columns:1fr}.sg-hero h1{font-size:50px}}
@media(prefers-reduced-motion:reduce){.sg-reading-grid>a{transition:none}}
@media print{.sg-jump,.sg-tool-controls,.sg-tool-live,.sg-hero .button{display:none!important}.sg-hero-grid,.sg-reading{display:block}.sg-section-intro{position:static}.sg-source-grid,.sg-reading-grid{grid-template-columns:1fr}.sg-section{break-inside:auto}.sg-guide{color:#111}.sg-section p{color:#222}}


.sg-hero h1 em,.sg-section h2 em{color:#e5bb8f}.sg-jump a:hover,.sg-guide :focus-visible{outline-color:#e5bb8f}.sg-hero-diagram{max-width:620px}.sg-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:28px 0}.sg-paths>a{display:block;min-width:0;padding:24px;border:1px solid var(--line);background:var(--panel)}.sg-paths a:hover{border-color:var(--copper)}.sg-paths span{font-size:10px;letter-spacing:.14em;color:var(--copper)}.sg-paths h3{margin:20px 0 14px}.sg-paths p{font-size:15px;line-height:1.8;color:#c5cfcd}.sg-paths b{font-size:12px;font-weight:500;color:var(--aqua)}.sg-comparison{overflow-x:auto;margin:30px 0;border:1px solid var(--line)}.sg-comparison table{min-width:760px;width:100%;border-collapse:collapse;text-align:left}.sg-comparison caption{text-align:left;padding:18px;color:var(--muted);font-size:13px;line-height:1.6}.sg-comparison th,.sg-comparison td{vertical-align:top;padding:20px;border-top:1px solid var(--line);font-size:15px;line-height:1.8}.sg-comparison thead th{font-size:11px;letter-spacing:.1em;color:var(--aqua);text-transform:uppercase}.sg-comparison tbody th{font:23px var(--display)}.sg-figure-wide{margin:32px 0}.sg-figure-wide img{display:block;width:100%;height:auto;border:1px solid var(--line)}.sg-figure-wide figcaption{max-width:95ch;color:var(--muted);font-size:13px;line-height:1.7;margin-top:16px}.sg-evidence-grid dl{margin:0}.sg-evidence-grid dt{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--aqua);margin-top:20px}.sg-evidence-grid dd{margin:8px 0 0;color:#c5cfcd;font-size:15px;line-height:1.8}.sg-update-note a{color:var(--aqua);text-decoration:underline;text-underline-offset:4px}.sg-reading-grid a:focus-visible,.sg-paths a:focus-visible{outline:2px solid var(--aqua);outline-offset:5px}
@media(max-width:1100px){.sg-paths{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}}
@media(max-width:700px){.sg-paths{grid-template-columns:1fr}.sg-hero h1{font-size:clamp(49px,11vw,72px)}}
@media print{.sg-paths{grid-template-columns:1fr}.sg-comparison{overflow:visible}.sg-comparison table{min-width:0}.sg-comparison td,.sg-comparison th{font-size:10px;padding:8px}}

@media(max-width:959px){.sg-hero h1 br:last-child{display:initial}}