:root{--ink:#082c50;--blue:#006dbb;--line:#d6e2ed;--muted:#536a7c;--paper:#fff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid #26a7ff;outline-offset:6px}.skip{position:absolute;top:-90px;background:white;padding:10px;z-index:20}.skip:focus{top:0}header{display:flex;align-items:center;justify-content:space-between;padding:28px 5%;border-bottom:1px solid var(--line);gap:24px}.brand{font-weight:800;letter-spacing:.12em;font-size:22px;white-space:nowrap}.brand span{font-size:12px;margin-left:9px;letter-spacing:.06em;font-weight:400}nav{display:flex;gap:36px;font-size:14px}nav a:hover,.text-link:hover{color:var(--blue)}.hero{position:relative;min-height:700px;display:grid;grid-template-columns:1.12fr 1fr;align-items:center;padding:65px 5% 110px;overflow:hidden}.hero-copy{z-index:1}.eyebrow{font-size:13px;font-weight:600;letter-spacing:.16em;margin:0 0 32px}h1{font-size:clamp(48px,5.7vw,90px);font-weight:400;letter-spacing:-.055em;line-height:1.04;margin:0 0 32px}h1 em{font-style:normal;color:var(--blue)}.intro{color:var(--muted);font-size:18px;line-height:1.7;margin-bottom:32px}.button{display:inline-flex;align-items:center;gap:32px;padding:17px 22px;background:var(--ink);color:#fff;font-size:14px;border:1px solid transparent;transition:background .2s,transform .2s}.button:hover{background:var(--blue);transform:translateY(-2px)}.button span{font-size:21px}.logo{margin:0;width:100%;max-width:610px;justify-self:center}.logo img{display:block;width:100%;height:auto}.hero-bottom{position:absolute;left:5%;right:5%;bottom:27px;border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;font-size:12px;letter-spacing:.1em}.hero-bottom a{letter-spacing:0;font-size:14px}.section{padding:100px 7%}.technology{background:#f2f7fb;display:grid;grid-template-columns:1fr 1fr;gap:10%}h2{font-size:clamp(36px,4vw,62px);font-weight:400;line-height:1.13;letter-spacing:-.045em;margin:0}.explanation p{color:var(--muted);margin:0 0 22px}.explanation .large{font-size:27px;line-height:1.35;color:var(--ink)}.text-link{border-bottom:1px solid var(--ink);padding:8px 0;display:inline-block;font-size:14px}.text-link span{margin-left:25px}.demo{background:#062a4a;color:white}.section-top{display:flex;justify-content:space-between;gap:24px}.section-top>span{font-size:12px;letter-spacing:.07em;color:#aac1d7}.demo-heading{display:flex;align-items:end;justify-content:space-between;gap:45px}.demo-heading p{max-width:350px;color:#c0d3e4;font-size:19px;margin:0}.metrics{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #36536e;border-bottom:1px solid #36536e;margin:50px 0}.metrics>div{padding:33px 20px 32px 0}.metrics>div+div{padding-left:35px;border-left:1px solid #36536e}.metrics strong{font-size:clamp(42px,5vw,76px);font-weight:400;letter-spacing:-.055em;line-height:1.2}.metrics strong span{font-size:25px;color:#86caff;letter-spacing:0}.metrics p{font-size:14px;color:#b7cddd;margin:14px 0 0}.experiment{display:grid;grid-template-columns:1fr 1fr;gap:10%;align-items:center}h3{font-weight:400;font-size:23px;margin:0 0 12px;letter-spacing:-.02em}.experiment p{color:#bfd2e3;margin:0}.calculation{padding:28px;border:1px solid #36536e}.calculation>span{font-size:12px;letter-spacing:.1em;color:#92b5d1}.calculation p{font-size:24px;margin:13px 0}.calculation div{font-size:17px;color:#c8d8e6}.calculation b{color:#80caff;font-weight:400;white-space:nowrap}.demo-bottom{margin-top:40px;display:flex;gap:25px;align-items:center;justify-content:space-between}.demo-bottom p{font-size:13px;color:#adc5d9}.light{background:#fff;color:var(--ink)}.light:hover{background:#dcedfc}.research-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:45px}.research-heading p{color:var(--muted);margin:0}.resource{display:flex;align-items:center;gap:32px;border-top:1px solid var(--line);padding:27px 0;transition:color .2s}.resource:last-child{border-bottom:1px solid var(--line)}.resource:hover{color:var(--blue)}.resource div{flex:1}.resource h3{margin:0 0 3px}.resource p{margin:0;color:var(--muted);font-size:14px}.number,.type{font-size:12px;letter-spacing:.07em;color:var(--muted)}.resource>span:last-child{font-size:28px}footer{border-top:1px solid var(--line);padding:35px 5%;display:flex;align-items:center;justify-content:space-between;gap:20px}footer p,footer>a:last-child{font-size:13px;color:var(--muted)}@media(min-width:1700px){body{max-width:1800px;margin:auto}.hero{min-height:800px}}@media(max-width:760px){header{padding:23px 6%;flex-wrap:wrap;gap:16px}.brand{font-size:19px}nav{gap:24px;font-size:14px}.hero{padding:46px 6% 85px;grid-template-columns:1fr;min-height:auto}.hero h1{font-size:clamp(43px,9.5vw,69px)}.hero .eyebrow{margin-bottom:25px}.hero .logo{width:80%;max-width:350px;margin-top:10px}.hero-bottom{left:6%;right:6%;font-size:12px;gap:16px}.hero-bottom>span:last-child{display:none}.section{padding:65px 6%}.technology{grid-template-columns:1fr;gap:32px}.explanation .large{font-size:24px}.section-top{display:block}.section-top .eyebrow{margin-bottom:14px}.section-top>span{display:block;margin-bottom:30px}.demo-heading{display:block}.demo-heading p{margin-top:24px;max-width:none}.metrics{grid-template-columns:1fr;margin:30px 0}.metrics>div{padding:24px 0}.metrics>div+div{padding:24px 0;border-left:0;border-top:1px solid #36536e}.metrics strong{font-size:56px}.metrics p{margin-top:5px}.experiment{grid-template-columns:1fr;gap:28px}.calculation{padding:22px}.demo-bottom{flex-direction:column;align-items:start;margin-top:22px}.research-heading{display:block}.research-heading p{margin-top:15px}.resource{gap:20px}.type{display:none}.resource h3{font-size:20px}footer{flex-wrap:wrap;padding:30px 6%}footer .brand{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Travel imagery and aluminum brand plaque */
header{padding-top:14px;padding-bottom:14px}.brand-plaque{display:block;width:116px;flex-shrink:0;line-height:0}.brand-plaque img{width:100%;height:auto;display:block}.hero{grid-template-columns:1fr 1.15fr;gap:32px;padding-top:55px;padding-bottom:115px;min-height:650px}.space-visual{margin:0;position:relative;align-self:stretch;min-height:440px}.space-visual img{position:absolute;width:100%;height:100%;object-fit:cover;object-position:center}.space-visual figcaption{position:absolute;bottom:18px;left:20px;right:20px;color:white;font-size:12px;letter-spacing:.09em;text-shadow:0 1px 5px #000}.flight-visual{margin:0;position:relative;background:#062a4a}.flight-visual img{display:block;width:100%;height:clamp(340px,48vw,740px);object-fit:cover}.flight-visual figcaption{display:flex;justify-content:space-between;align-items:center;padding:23px 7%;gap:24px;color:#fff}.flight-visual figcaption span:first-child{font-size:27px;letter-spacing:-.03em}.flight-visual figcaption span:last-child{font-size:12px;letter-spacing:.09em;color:#bfd2e3}@media(max-width:760px){header{flex-wrap:nowrap}.brand-plaque{width:90px}nav{flex-wrap:wrap;justify-content:flex-end;gap:10px 18px}.hero{grid-template-columns:1fr;padding-top:36px;gap:28px}.space-visual{min-height:340px}.space-visual img{object-fit:cover}.flight-visual img{height:390px}.flight-visual figcaption{align-items:start;flex-direction:column;gap:8px}.flight-visual figcaption span:first-child{font-size:24px}}

.space-visual{min-height:0;align-self:center}.space-visual img{position:relative;height:auto;object-fit:contain}.space-visual figcaption{bottom:0;left:0;right:0;padding:24px 18px 12px;background:linear-gradient(transparent,rgba(0,15,30,.75))}@media(max-width:760px){.space-visual{min-height:0}}

/* Clean header using the supplied full-color identity. */
header{background:#fff;border-bottom:1px solid var(--line);color:var(--ink)}.brand-plaque{width:156px;mix-blend-mode:normal}.brand-plaque img{filter:none}header nav a{color:var(--ink);font-weight:500}header nav a:hover{color:var(--blue)}

/* Technical results from the Space Drive paper. */
.evidence{background:#fff}.evidence-heading{display:grid;grid-template-columns:1.1fr 1fr;gap:10%;align-items:end}.evidence-heading>p{font-size:19px;color:var(--muted);margin:0}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:55px 0}.result-grid article{padding:32px 28px 32px 0}.result-grid article+article{border-left:1px solid var(--line);padding-left:32px}.result-grid article>span{display:block;font-size:12px;letter-spacing:.09em;color:var(--muted);margin-bottom:14px}.result-grid strong{display:block;font-size:clamp(44px,5vw,74px);font-weight:400;letter-spacing:-.055em;line-height:1}.result-grid small{font-size:24px;color:var(--blue);letter-spacing:0}.result-grid p{color:var(--muted);font-size:14px;line-height:1.55;margin:18px 0 0}.gas-results{max-width:900px;margin-left:auto}.gas-results h3{margin-bottom:20px}.gas-row{display:grid;grid-template-columns:1fr 130px 1fr;gap:25px;padding:15px 0;border-top:1px solid var(--line);align-items:center}.gas-row:last-child{border-bottom:1px solid var(--line)}.gas-row b{font-weight:500;color:var(--blue)}.gas-row i{font-style:normal;color:var(--muted);font-size:14px}.source-note{max-width:900px;margin:16px 0 0 auto;color:var(--muted);font-size:13px}

@media(max-width:760px){.brand-plaque{width:116px}.evidence-heading{grid-template-columns:1fr;gap:24px}.result-grid{grid-template-columns:1fr;margin:35px 0}.result-grid article{padding:25px 0}.result-grid article+article{border-left:0;border-top:1px solid var(--line);padding-left:0}.gas-row{grid-template-columns:1fr auto;gap:8px 20px}.gas-row i{grid-column:1 / -1}.result-grid strong{font-size:54px}}

.flight-visual video{display:block;width:100%;aspect-ratio:16/9;max-height:740px;object-fit:contain;background:#062a4a}
@media(max-width:760px){.flight-visual video{height:auto;max-height:none}}

.evidence-heading .payload-comparison{grid-column:2;font-size:18px;color:var(--ink);margin:18px 0 0;border-left:3px solid var(--blue);padding-left:20px}
@media(max-width:760px){.evidence-heading .payload-comparison{grid-column:1;margin:0}}

/* Continuous-acceleration travel estimates. */
.technology>div{min-width:0}.travel-times{margin:28px 0;max-width:100%}.travel-times table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:1rem;line-height:1.5}.travel-times th,.travel-times td{text-align:left;vertical-align:top;padding:14px 10px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.travel-times thead th{color:var(--ink);font-weight:600;border-top:1px solid var(--line);background:#e7f0f7}.travel-times th:first-child{width:44%;padding-left:0}.travel-times th:last-child{width:24%}.travel-times tbody th{font-weight:400;color:var(--ink)}.travel-times td{color:var(--muted)}.travel-times td:last-child{color:var(--blue)}
