/* Quantum Advantage site. Colors and type from brand/README.md. */
:root {
  --midnight: #0B1630; --vellum: #F2F5FB; --ice: #8FB4FF; --deep-ice: #2B4FB8;
  --dusk: #3A4E7A; --mist: #A7B3CC; --slate: #4A5878; --rule: #D9DFEC;
  --serif: "Newsreader", Georgia, serif; --mono: "DM Mono", Consolas, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--vellum); color: var(--midnight); font: 400 1.125rem/1.6 var(--serif); }
a { color: var(--deep-ice); text-underline-offset: 0.15em; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1.5rem; }
h1, h2, h3 { font-weight: 500; letter-spacing: -0.015em; margin: 0; }
h1 { font-size: clamp(2.2rem, 5.2vw, 3.6rem); line-height: 1.08; max-width: 18em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); line-height: 1.18; max-width: 24em; margin-bottom: 1.25rem; }
h3 { font-size: 1.3rem; line-height: 1.25; margin-bottom: 0.4rem; }
p { margin: 0 0 1rem; }

/* Header and hero (dark) */
header.site { background: var(--midnight); color: var(--vellum); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem 2rem; flex-wrap: wrap; padding-top: 1.4rem; padding-bottom: 1.4rem; }
.brand img { display: block; width: 13.5rem; }
nav { display: flex; align-items: center; gap: 0.4rem 1.6rem; flex-wrap: wrap; font: 500 0.82rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
nav a { color: var(--mist); text-decoration: none; padding: 0.4rem 0; }
nav a:hover, nav a[aria-current] { color: var(--vellum); }
nav a[aria-current] { border-bottom: 1px solid var(--ice); }
.hero { padding-top: 4.5rem; padding-bottom: 6rem; }
.hero.short { padding-top: 3.5rem; padding-bottom: 4.5rem; }
.eyebrow { font: 500 0.8rem/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ice); margin-bottom: 1.5rem; }
.lede { color: var(--mist); font-size: 1.3rem; max-width: 34em; margin-top: 1.5rem; }
.ctas { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 2.2rem; }

.btn { display: inline-block; font: 500 0.85rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none;
  background: var(--ice); color: var(--midnight); padding: 0.95rem 1.3rem; border-radius: 3px; border: 1px solid var(--ice); }
.btn:hover { background: var(--vellum); border-color: var(--vellum); }
.btn.ghost { background: transparent; color: var(--vellum); border-color: var(--dusk); }
.btn.ghost:hover { border-color: var(--ice); }
nav .btn.small { padding: 0.6rem 0.9rem; color: var(--midnight); }
nav .btn.small[aria-current] { border-bottom: 1px solid var(--ice); }

/* Content blocks (light) */
.block { padding-top: 4.5rem; padding-bottom: 4.5rem; border-bottom: 1px solid var(--rule); }
main > .block:last-child { border-bottom: 0; }
.label { font: 500 0.78rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--slate); margin-bottom: 1.4rem; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; max-width: 58rem; }
.more { margin-top: 1.5rem; font-family: var(--mono); font-size: 0.9rem; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.steps li { border-top: 2px solid var(--midnight); padding-top: 1rem; }
.steps .n { display: block; font: 500 0.85rem/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--deep-ice); margin-bottom: 0.8rem; }

.flow { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.flow li { background: #fff; border: 1px solid var(--rule); border-radius: 4px; padding: 1.4rem; }
.flow .n { display: block; font: 500 0.85rem/1 var(--mono); color: var(--deep-ice); margin-bottom: 1rem; }
.flow p { font-size: 1rem; margin: 0; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 1rem; }
.card { background: #fff; border: 1px solid var(--rule); border-radius: 4px; padding: 1.4rem; }
.card p { font-size: 1rem; margin: 0; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 0.5rem 0 2rem; }
.stats div { border-left: 3px solid var(--deep-ice); padding-left: 1rem; }
.stats .big { display: block; font-size: 2.6rem; line-height: 1.1; font-weight: 500; letter-spacing: -0.02em; }
.stats span:not(.big) { color: var(--slate); font-size: 1rem; }

.cta-band { background: var(--midnight); color: var(--vellum); }
.cta-band .wrap { padding-top: 4rem; padding-bottom: 4rem; }
.cta-band p { color: var(--mist); }
.cta-band h2 { margin-bottom: 0.8rem; }
.cta-band .btn { margin-top: 0.8rem; }

/* About */
.founder { display: grid; grid-template-columns: 18rem 1fr; gap: 3rem; align-items: start; }
.portrait { width: 100%; border-radius: 4px; display: block; }
.role { font: 500 0.85rem/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate); margin-top: -0.6rem; margin-bottom: 1.4rem; }
.links a { margin-right: 1.2rem; font-family: var(--mono); font-size: 0.9rem; }
.timeline, .pubs, .plain { list-style: none; padding: 0; margin: 0; max-width: 58rem; }
.timeline li { display: grid; grid-template-columns: 9rem 1fr; gap: 1.5rem; padding: 1.2rem 0; border-top: 1px solid var(--rule); }
.timeline .when { font: 400 0.9rem/1.9 var(--mono); color: var(--slate); }
.timeline p { font-size: 1rem; margin: 0; color: var(--slate); }
.pubs li { padding: 0.9rem 0; border-top: 1px solid var(--rule); }
.pubs span { display: block; font: 400 0.85rem/1.5 var(--mono); color: var(--slate); margin-top: 0.2rem; }
.plain li { padding: 0.7rem 0; border-top: 1px solid var(--rule); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 3rem; }
.contact-grid .label { margin-top: 1.6rem; }
.contact-grid .label:first-child { margin-top: 0; }
.big-link { font-size: 1.5rem; }

/* Footer */
footer.site { background: var(--midnight); color: var(--mist); font: 400 0.85rem/1.7 var(--mono); border-top: 1px solid var(--dusk); }
.foot { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 2rem; padding-top: 3rem; padding-bottom: 2rem; }
.foot img { width: 11rem; display: block; margin-bottom: 0.8rem; }
.foot-links { display: flex; flex-direction: column; gap: 0.3rem; }
footer.site a { color: var(--vellum); text-decoration: none; }
footer.site a:hover { text-decoration: underline; }
.legal { padding-bottom: 2rem; color: var(--slate); }

@media (max-width: 860px) {
  .flow { grid-template-columns: 1fr 1fr; }
  .steps, .cards, .stats { grid-template-columns: 1fr; }
  .founder { grid-template-columns: 1fr; gap: 1.5rem; }
  .founder .portrait { max-width: 16rem; }
  .foot { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .two, .flow, .contact-grid { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 0.2rem; }
  .hero { padding-top: 3rem; padding-bottom: 4rem; }
  .block { padding-top: 3.2rem; padding-bottom: 3.2rem; }
  nav { gap: 0.4rem 1.1rem; }
}

/* Graphics (2026-10-29): hero circuit, pillars, tags, approach loop */
.hero.split { display: grid; grid-template-columns: 1.15fr 1fr; gap: 3rem; align-items: center; }
.hero-art { width: 100%; height: auto; }
.hero-art .pulse rect { opacity: 0.15; animation: qa-pulse 4s ease-in-out infinite; }
@keyframes qa-pulse { 0%, 100% { opacity: 0.15; } 20%, 45% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .hero-art .pulse rect { animation: none; opacity: 1; } }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.pillars svg { width: 3rem; height: 3rem; display: block; margin-bottom: 1rem; }
.pillars p { color: var(--slate); font-size: 1.05rem; margin: 0; }

.tags { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.7rem; }
.tags li { font: 500 0.9rem/1 var(--mono); letter-spacing: 0.04em; padding: 0.8rem 1.1rem; border: 1px solid var(--rule); border-radius: 999px; background: #fff; }

.approach { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center; }
.loop { width: 100%; max-width: 26rem; height: auto; justify-self: center; }
.flow-list { list-style: none; padding: 0; margin: 0; }
.flow-list li { display: grid; grid-template-columns: 2.5rem 1fr; gap: 1rem; padding: 1.1rem 0; border-top: 1px solid var(--rule); }
.flow-list li:first-child { border-top: 0; }
.flow-list .n { font: 500 0.85rem/1.9 var(--mono); color: var(--deep-ice); }
.flow-list p { margin: 0; color: var(--slate); font-size: 1.05rem; }
.cards.two-up { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 860px) {
  .hero.split, .approach { grid-template-columns: 1fr; }
  .hero-art { max-width: 26rem; }
  .pillars, .cards.two-up { grid-template-columns: 1fr; gap: 1.8rem; }
}
.pillars > div { border-top: 2px solid var(--midnight); padding-top: 1rem; }
.pillars .n { display: block; font: 500 0.85rem/1 var(--mono); color: var(--deep-ice); margin-bottom: 0.8rem; }
.details { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.details .label { margin-bottom: 0.6rem; }
@media (max-width: 600px) { .details { grid-template-columns: 1fr; gap: 1rem; } }