:root {
  color-scheme: dark;
  --ink: #f4f7fb;
  --muted: #aab5c5;
  --line: rgba(206, 220, 240, .16);
  --blue: #71d7ff;
  --bg: #111827;
  --surface: #1b2638;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; background: var(--bg); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.7;
  background: radial-gradient(ellipse at 72% 18%, rgba(51, 104, 145, .2), transparent 42%), var(--bg);
}
a { color: inherit; }
.skip-link {
  position: absolute;
  top: -48px;
  left: 20px;
  z-index: 2;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--bg);
  background: var(--blue);
}
.skip-link:focus { top: 12px; }
.site-shell { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.site-header, .site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header { min-height: 84px; border-bottom: 1px solid var(--line); }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: .9rem;
  font-weight: 760;
  letter-spacing: .08em;
}
.brand-mark {
  width: 30px;
  height: 30px;
  border: 1px solid rgba(113, 215, 255, .5);
  border-radius: 50%;
  background: radial-gradient(circle, var(--blue) 0 3px, transparent 4px);
}
nav { display: flex; gap: clamp(18px, 3vw, 34px); }
nav a, .header-label {
  color: var(--muted);
  font-size: .78rem;
  text-decoration: none;
}
nav a:hover, nav a:focus-visible, .text-link:hover { color: var(--blue); }
.hero { padding-block: clamp(84px, 13vh, 140px) 92px; }
.eyebrow, .section-label {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: .72rem;
  font-weight: 720;
  letter-spacing: .14em;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 850px;
  margin-bottom: 0;
  font-size: clamp(2.8rem, 7vw, 6rem);
  font-weight: 620;
  line-height: 1.08;
  letter-spacing: -.065em;
  text-wrap: balance;
}
.lede {
  max-width: 620px;
  margin: 26px 0 30px;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.13rem);
}
.button {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 11px 16px;
  border: 1px solid rgba(113, 215, 255, .38);
  border-radius: 9px;
  color: var(--ink);
  background: rgba(113, 215, 255, .07);
  font-size: .84rem;
  text-decoration: none;
  transition: background .2s ease, border-color .2s ease;
}
.button:hover { border-color: var(--blue); background: rgba(113, 215, 255, .14); }
.feature {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 32px;
  align-items: center;
  padding: clamp(26px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255,255,255,.045), rgba(255,255,255,.015));
}
.feature-copy h2, .about-heading h2, .section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(1.65rem, 3.5vw, 2.55rem);
  line-height: 1.2;
  letter-spacing: -.04em;
}
.feature-copy > p:not(.section-label), .section-heading > p:not(.eyebrow) {
  max-width: 570px;
  color: var(--muted);
  font-size: .95rem;
}
.text-link {
  display: inline-flex;
  gap: 12px;
  margin-top: 8px;
  color: var(--ink);
  font-size: .85rem;
  text-decoration: none;
}
.feature-art {
  position: relative;
  min-height: 235px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(113, 215, 255, .2);
  border-radius: 14px;
  background: radial-gradient(circle at center, rgba(113, 215, 255, .14), transparent 56%), #141e2d;
}
.art-orbit {
  position: absolute;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(113, 215, 255, .35);
  border-radius: 50%;
  box-shadow: 0 0 0 22px rgba(113, 215, 255, .035), 0 0 0 46px rgba(113, 215, 255, .025);
}
.art-number {
  position: relative;
  color: var(--blue);
  font-family: Georgia, serif;
  font-size: 4.5rem;
  line-height: 1;
}
.art-caption {
  position: absolute;
  right: 18px;
  bottom: 14px;
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .08em;
}
.notes { padding-block: 112px 104px; }
.section-heading { margin-bottom: 28px; }
.section-heading h2 { margin-bottom: 8px; }
.section-heading > p:not(.eyebrow) { margin-bottom: 0; }
.note-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.note-card {
  min-height: 205px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255,255,255,.025);
  transition: transform .2s ease, background .2s ease;
}
.note-card:hover { transform: translateY(-3px); background: rgba(255,255,255,.05); }
.note-number { margin-bottom: 24px; color: var(--blue); font-size: .72rem; letter-spacing: .1em; }
.note-number span { margin-left: 8px; color: var(--muted); }
.note-card h3 { margin-bottom: 8px; font-size: 1.12rem; }
.note-card > p:last-child { max-width: 440px; margin-bottom: 0; color: var(--muted); font-size: .88rem; }
.about {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 40px;
  padding-block: 52px;
  border-top: 1px solid var(--line);
}
.about-heading h2 { max-width: 330px; }
.principles { display: grid; gap: 12px; }
.principles article {
  display: grid;
  grid-template-columns: 34px 1fr;
  column-gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.principles article > span { grid-row: span 2; color: var(--blue); font-size: .74rem; }
.principles h3 { margin-bottom: 2px; font-size: .94rem; }
.principles p { margin-bottom: 0; color: var(--muted); font-size: .84rem; }
.closing { padding-block: 76px 86px; }
.closing-line {
  max-width: 740px;
  margin-bottom: 0;
  font-size: clamp(1.4rem, 3.3vw, 2.35rem);
  font-weight: 520;
  line-height: 1.4;
  letter-spacing: -.035em;
}
.site-footer {
  min-height: 72px;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .04em;
}
@media (max-width: 700px) {
  .site-shell { width: min(calc(100% - 32px), var(--max)); }
  .site-header { min-height: 72px; }
  nav { gap: 14px; }
  nav a { font-size: .72rem; }
  .hero { padding-block: 78px 72px; }
  .feature, .about { grid-template-columns: 1fr; }
  .feature-art { min-height: 190px; }
  .notes { padding-block: 82px 74px; }
  .note-grid { grid-template-columns: 1fr; }
  .about { gap: 18px; padding-top: 36px; }
  .closing { padding-block: 60px 68px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}