:root{
  --bg:#090b0e;--bg-2:#0e1116;--panel:#12161c;--panel-2:#171c23;--line:#272e38;
  --text:#f6f7f9;--muted:#a6afbb;--muted-2:#77818e;--accent:#ff7a1a;--accent-soft:#ff9a52;
  --ok:#66d38b;--max:1160px;--radius:22px;--shadow:0 24px 70px rgba(0,0,0,.28)
}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg)}body{margin:0;color:var(--text);background:
radial-gradient(circle at 78% 4%,rgba(255,122,26,.11),transparent 28rem),
linear-gradient(180deg,var(--bg),#0b0e12 55%,var(--bg));font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:8px}.skip{position:absolute;left:12px;top:-60px;padding:10px 14px;background:var(--accent);color:#111;z-index:99;border-radius:10px;font-weight:700}.skip:focus{top:12px}.shell{width:min(calc(100% - 40px),var(--max));margin:auto}.nav{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-weight:760;letter-spacing:-.025em}.mark{display:block;width:38px;height:38px;border-radius:11px;background:url('/assets/euler-logo.jpg') center/cover no-repeat;box-shadow:0 0 0 1px rgba(255,255,255,.06),0 10px 32px rgba(255,122,26,.18)}.brand-name{font-size:18px}.links{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:14px}.links a{position:relative;padding:8px 0}.links a:hover,.links a[aria-current="page"]{color:var(--text)}.links a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;background:var(--accent)}
main{min-height:62vh}.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:64px;align-items:center;padding:112px 0 82px}.eyebrow,.kicker{color:var(--accent);text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:800}.hero h1,.page h1{margin:14px 0 24px;line-height:.96;letter-spacing:-.058em}.hero h1{max-width:900px;font-size:clamp(56px,8.8vw,104px)}.hero-copy{max-width:760px;color:var(--muted);font-size:clamp(19px,2.15vw,24px)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border:1px solid var(--line);border-radius:12px;background:var(--panel);font-weight:700;font-size:14px;transition:transform .2s ease,border-color .2s ease,background .2s ease}.button.primary{background:var(--accent);border-color:var(--accent);color:#111}.button:hover{transform:translateY(-2px);border-color:#495362}.button.primary:hover{background:var(--accent-soft);border-color:var(--accent-soft)}.hero-mark{justify-self:end;width:min(100%,360px);aspect-ratio:1;border-radius:30px;background:linear-gradient(145deg,rgba(255,122,26,.15),rgba(255,122,26,.025)),var(--panel);border:1px solid var(--line);display:grid;place-items:center;box-shadow:var(--shadow);position:relative;overflow:hidden}.hero-mark::before{content:"";position:absolute;inset:-1px;background:linear-gradient(135deg,rgba(255,255,255,.08),transparent 38%);pointer-events:none}.hero-mark img{width:47%;height:47%;object-fit:cover;border-radius:24%;box-shadow:0 22px 70px rgba(255,122,26,.24)}
.section{padding:26px 0 92px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:30px}.section-head h2{margin:7px 0 0;font-size:clamp(30px,4vw,48px);letter-spacing:-.045em;line-height:1.05}.section-head p{max-width:520px;margin:0;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{position:relative;min-height:250px;padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(160deg,rgba(255,255,255,.025),transparent 42%),var(--panel);display:flex;flex-direction:column;transition:transform .22s ease,border-color .22s ease,background .22s ease}.card:hover{transform:translateY(-4px);border-color:#3b4654;background:var(--panel-2)}.card .num,.tag{font-size:11px;color:var(--accent);letter-spacing:.14em;text-transform:uppercase;font-weight:800}.card h3{margin:42px 0 10px;font-size:25px;line-height:1.15;letter-spacing:-.035em}.card p{margin:0;color:var(--muted)}.card .arrow{margin-top:auto;padding-top:28px;color:var(--muted);font-size:14px}.card:hover .arrow{color:var(--text)}.principles{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}.principle{padding:28px 32px 28px 0;border-bottom:1px solid var(--line)}.principle:nth-child(odd){border-right:1px solid var(--line)}.principle:nth-child(even){padding-left:32px}.principle strong{display:block;font-size:22px;letter-spacing:-.025em;margin-bottom:7px}.principle span{color:var(--muted)}
.page{padding:82px 0 110px}.page h1{font-size:clamp(48px,7vw,80px);max-width:940px}.lead{max-width:780px;color:var(--muted);font-size:clamp(19px,2vw,23px)}.stack{margin-top:60px;border-top:1px solid var(--line)}.row{display:grid;grid-template-columns:170px minmax(0,1fr);gap:30px;padding:30px 0;border-bottom:1px solid var(--line)}.row-label{color:var(--muted-2);font-size:13px;text-transform:uppercase;letter-spacing:.1em}.row h2{margin:0 0 8px;font-size:25px;letter-spacing:-.035em}.row p{margin:0;color:var(--muted);max-width:760px}.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:56px}.project-card{padding:30px;min-height:255px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);display:flex;flex-direction:column}.project-card h2{font-size:30px;letter-spacing:-.04em;margin:34px 0 10px}.project-card p{color:var(--muted);margin:0}.project-card .meta{margin-top:auto;padding-top:30px;color:var(--muted-2);font-size:13px}.note-list{margin-top:56px}.note{display:grid;grid-template-columns:64px 1fr;gap:20px;padding:26px 0;border-top:1px solid var(--line)}.note:last-child{border-bottom:1px solid var(--line)}.note-index{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.1em}.note h2{margin:0 0 8px;font-size:24px;letter-spacing:-.03em}.note p{margin:0;color:var(--muted);max-width:780px}.status-card{margin-top:46px;padding:28px;border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;gap:20px}.status-line{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:750}.dot{width:11px;height:11px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 6px rgba(102,211,139,.09)}.status-meta{color:var(--muted);font-size:14px}.error-code{font-size:clamp(88px,20vw,190px);line-height:.82;letter-spacing:-.08em;color:transparent;-webkit-text-stroke:1px #343d48;margin:18px 0 30px}
footer{border-top:1px solid var(--line);padding:30px 0 44px;color:var(--muted);font-size:13px}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:end}.footer-brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700}.footer-brand .mark{width:28px;height:28px;border-radius:8px}.footer-copy{max-width:510px;margin:14px 0 0}.footer-links{display:flex;justify-content:flex-end;gap:20px;flex-wrap:wrap}.footer-links a:hover{color:var(--text)}.fineprint{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:28px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted-2)}
.reveal{opacity:0;transform:translateY(10px)}.js .reveal.in{opacity:1;transform:none;transition:opacity .55s ease,transform .55s ease}
@media(max-width:900px){.hero{grid-template-columns:1fr;gap:42px;padding-top:86px}.hero-mark{justify-self:start;width:min(72vw,320px)}.grid{grid-template-columns:1fr 1fr}.card:last-child{grid-column:1/-1}.project-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start}}
@media(max-width:680px){.shell{width:min(calc(100% - 28px),var(--max))}.nav{align-items:flex-start}.links{gap:13px;font-size:13px;flex-wrap:wrap;justify-content:flex-end}.links a:nth-child(3){display:none}.hero{padding:68px 0 58px}.hero h1{font-size:clamp(48px,16vw,72px)}.hero-mark{width:min(78vw,280px)}.section{padding-bottom:68px}.section-head{display:block}.section-head p{margin-top:14px}.grid{grid-template-columns:1fr}.card:last-child{grid-column:auto}.principles{grid-template-columns:1fr}.principle,.principle:nth-child(even){padding:24px 0;border-right:0}.page{padding:62px 0 84px}.row{grid-template-columns:1fr;gap:8px}.project-card{min-height:220px}.status-card{align-items:flex-start;flex-direction:column}.footer-links{gap:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.card{transition:none}.reveal,.js .reveal.in{opacity:1;transform:none;transition:none}}
@media print{body{background:#fff;color:#111}.nav,.hero-actions,.hero-mark,footer{display:none}.shell{width:100%}.card,.project-card,.status-card{border-color:#ccc;background:#fff;box-shadow:none}.hero,.page{padding:24px 0}.hero-copy,.lead,.card p,.row p,.note p,.status-meta{color:#444}}

/* Story / origin */
.story-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(340px,.92fr);gap:64px;align-items:center;padding:40px 0 12px}.story-grid h2,.origin h2{margin:8px 0 18px;font-size:clamp(36px,5vw,58px);line-height:1.02;letter-spacing:-.05em}.story-grid p{max-width:680px;color:var(--muted);font-size:18px}.story-lead{color:var(--text)!important;font-size:clamp(19px,2vw,23px)!important}.text-link{display:inline-flex;gap:8px;align-items:center;margin-top:12px;color:var(--accent);font-weight:750}.text-link span{transition:transform .2s ease}.text-link:hover span{transform:translateX(4px)}
.bridge-map{position:relative;min-height:340px;border:1px solid var(--line);border-radius:var(--radius);background:radial-gradient(circle at 50% 45%,rgba(255,122,26,.09),transparent 50%),linear-gradient(145deg,rgba(255,255,255,.02),transparent),var(--panel);overflow:hidden}.bridge-map::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(to bottom,#000,transparent 88%)}.node{position:absolute;z-index:2;display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#10141a;border:1px solid #45505e;color:var(--text);font-size:12px;font-weight:800;box-shadow:0 0 0 8px rgba(9,11,14,.72)}.n1{left:15%;top:18%}.n2{right:15%;top:22%}.n3{left:24%;bottom:22%}.n4{right:20%;bottom:18%}.edge{position:absolute;z-index:1;height:2px;background:linear-gradient(90deg,var(--accent),rgba(255,122,26,.28));transform-origin:left center;border-radius:2px}.e1{left:21%;top:26%;width:58%;transform:rotate(3deg)}.e2{left:20%;top:29%;width:44%;transform:rotate(49deg)}.e3{left:31%;bottom:29%;width:48%;transform:rotate(-6deg)}.e4{right:19%;top:30%;width:42%;transform-origin:right center;transform:rotate(-54deg)}.e5{left:35%;top:51%;width:37%;transform:rotate(-24deg);opacity:.72}.map-caption{position:absolute;left:22px;right:22px;bottom:17px;color:var(--muted-2);font-size:11px;letter-spacing:.12em;text-transform:uppercase}
.origin{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:48px;align-items:stretch;margin-top:58px;padding:34px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(135deg,rgba(255,122,26,.08),transparent 48%),var(--panel)}.origin-copy p{color:var(--muted);max-width:720px}.origin-copy p+p{margin-top:14px}.origin-quote{min-height:270px;border-left:1px solid var(--line);padding:20px 8px 20px 38px;display:flex;flex-direction:column;justify-content:space-between}.quote-mark{font-size:72px;line-height:1;color:var(--accent);font-family:Georgia,serif}.origin-quote p{margin:0;font-size:clamp(24px,3vw,34px);line-height:1.15;letter-spacing:-.04em;color:var(--text)}
@media(max-width:900px){.story-grid{grid-template-columns:1fr;gap:30px}.bridge-map{min-height:300px}.origin{grid-template-columns:1fr}.origin-quote{min-height:auto;border-left:0;border-top:1px solid var(--line);padding:28px 0 0;gap:28px}}
@media(max-width:680px){.links{max-width:72%}.links a:nth-child(4){display:none}.story-grid{padding-top:18px}.bridge-map{min-height:260px}.node{width:44px;height:44px}.origin{padding:24px}.origin-quote p{font-size:26px}}


/* Navigation + content polish */
.mobile-nav{display:none;position:relative}.mobile-nav summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:9px;padding:9px 11px;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:13px;font-weight:700;background:rgba(18,22,28,.8)}.mobile-nav summary::-webkit-details-marker{display:none}.mobile-nav summary i{position:relative;width:14px;height:10px;border-top:1.5px solid currentColor;border-bottom:1.5px solid currentColor}.mobile-nav summary i::after{content:"";position:absolute;left:0;right:0;top:3px;border-top:1.5px solid currentColor}.mobile-nav[open] summary{color:var(--text);border-color:#414b58}.mobile-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:20;width:min(250px,calc(100vw - 28px));padding:8px;border:1px solid var(--line);border-radius:14px;background:rgba(14,17,22,.97);box-shadow:0 22px 60px rgba(0,0,0,.45);backdrop-filter:blur(16px)}.mobile-menu a{display:flex;align-items:center;justify-content:space-between;padding:11px 12px;border-radius:9px;color:var(--muted);font-size:14px}.mobile-menu a:hover,.mobile-menu a[aria-current="page"]{color:var(--text);background:rgba(255,255,255,.045)}.mobile-menu a[aria-current="page"]::after{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.project-process{margin-top:76px;padding-top:10px}.process-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}.process-grid li{min-height:210px;padding:24px;border-right:1px solid var(--line);display:flex;flex-direction:column}.process-grid li:last-child{border-right:0}.process-grid span{color:var(--accent);font-size:11px;letter-spacing:.14em;font-weight:800}.process-grid strong{margin-top:40px;font-size:22px;letter-spacing:-.03em}.process-grid p{margin:auto 0 0;color:var(--muted);font-size:14px}.notes-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:46px;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted-2);font-size:13px}.note-list{margin-top:0}.note{scroll-margin-top:24px}.note:target{background:linear-gradient(90deg,rgba(255,122,26,.07),transparent 72%)}.route-chips{display:flex;gap:9px;flex-wrap:wrap;margin-top:28px}.route-chips a{padding:8px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:13px}.route-chips a:hover{color:var(--text);border-color:#46515f}
@media(max-width:900px){.process-grid{grid-template-columns:1fr 1fr}.process-grid li:nth-child(2){border-right:0}.process-grid li:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media(max-width:680px){.nav{align-items:center}.links{display:none}.mobile-nav{display:block}.process-grid{grid-template-columns:1fr}.process-grid li{min-height:165px;border-right:0;border-bottom:1px solid var(--line)!important}.process-grid li:last-child{border-bottom:0!important}.process-grid strong{margin-top:26px}.notes-toolbar{align-items:flex-start;flex-direction:column;gap:8px}.project-process{margin-top:58px}}
@media(prefers-reduced-motion:reduce){.mobile-menu{backdrop-filter:none}}