:root {
  color: #eef3ff;
  background: #050815;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { min-width: 320px; min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: #050815;
}

a { color: inherit; }

.ambient,
.starfield,
.horizon {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.ambient {
  overflow: hidden;
  background:
    radial-gradient(circle at 74% 48%, #5148ba22 0, transparent 23rem),
    radial-gradient(circle at 18% 12%, #176c9933 0, transparent 30rem),
    linear-gradient(145deg, #07101f 0%, #050815 54%, #090717 100%);
}

.starfield {
  opacity: .68;
  background-image:
    radial-gradient(circle at 10% 18%, #fff 0 1px, transparent 1.5px),
    radial-gradient(circle at 27% 72%, #8fdfff 0 1px, transparent 1.5px),
    radial-gradient(circle at 52% 22%, #fff 0 1px, transparent 1.5px),
    radial-gradient(circle at 67% 80%, #bfb8ff 0 1px, transparent 1.5px),
    radial-gradient(circle at 88% 13%, #fff 0 1px, transparent 1.5px),
    radial-gradient(circle at 94% 62%, #7fdfff 0 1px, transparent 1.5px);
  background-size: 320px 260px, 410px 330px, 370px 290px, 460px 350px, 520px 390px, 290px 240px;
}

.horizon {
  top: 58%;
  opacity: .22;
  transform: perspective(440px) rotateX(68deg) scale(1.7);
  transform-origin: center top;
  background-image:
    linear-gradient(#5d7acb44 1px, transparent 1px),
    linear-gradient(90deg, #5d7acb44 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, #000, transparent 70%);
}

.page-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(1280px, calc(100% - 72px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 34px 0 28px;
}

.topline,
footer {
  display: flex;
  align-items: center;
  gap: 18px;
}

.topline { justify-content: space-between; }

.wordmark {
  text-decoration: none;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .22em;
}

.wordmark-dot { color: #69dcff; }

.topline p,
footer {
  margin: 0;
  color: #6f7e9c;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .19em;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(390px, .96fr);
  align-items: center;
  gap: clamp(38px, 7vw, 110px);
  padding: 70px 0;
}

.copy { max-width: 680px; }

.term {
  margin: 0 0 24px;
  color: #71dfff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
}

h1 {
  margin: 0;
  font-size: clamp(46px, 6.4vw, 92px);
  font-weight: 650;
  line-height: .98;
  letter-spacing: -.065em;
}

h1 em {
  color: transparent;
  font-style: normal;
  background: linear-gradient(95deg, #7fe6ff 0%, #8b9cff 48%, #bf8aff 100%);
  background-clip: text;
  -webkit-background-clip: text;
}

.lead {
  max-width: 630px;
  margin: 32px 0 0;
  color: #a3aec5;
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.75;
}

.definition {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 16px;
  width: fit-content;
  margin-top: 34px;
  padding: 12px 16px 12px 12px;
  border: 1px solid #293652;
  border-radius: 999px;
  background: #0b1222aa;
  backdrop-filter: blur(12px);
}

.definition span {
  padding: 7px 12px;
  border-radius: 999px;
  color: #07101c;
  background: #78ddf7;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.definition p {
  margin: 0;
  color: #9aa7c0;
  font-size: 12px;
}

.diagram {
  position: relative;
  aspect-ratio: 1;
  width: min(100%, 570px);
  margin: 0 auto;
  filter: drop-shadow(0 30px 70px #0008);
}

.diagram::before {
  content: "";
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, #bba1ff20 0 11%, #4265d718 25%, transparent 67%);
  box-shadow: inset 0 0 80px #4265d718;
}

.orbit,
.axis,
.point,
.core {
  position: absolute;
  top: 50%;
  left: 50%;
}

.orbit {
  border: 1px solid #728ce044;
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-18deg);
}

.orbit::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  border-top: 1px solid #87e8ffcc;
  border-right: 1px solid transparent;
  animation: orbit 18s linear infinite;
}

.orbit-outer { width: 92%; height: 46%; }
.orbit-middle { width: 70%; height: 36%; transform: translate(-50%, -50%) rotate(38deg); }
.orbit-inner { width: 49%; height: 25%; transform: translate(-50%, -50%) rotate(-64deg); }
.orbit-middle::after { animation-duration: 13s; animation-direction: reverse; }
.orbit-inner::after { animation-duration: 9s; }

.axis { background: linear-gradient(90deg, transparent, #6385d855, transparent); }
.axis-horizontal { width: 96%; height: 1px; transform: translate(-50%, -50%) rotate(-8deg); }
.axis-vertical { width: 1px; height: 88%; transform: translate(-50%, -50%) rotate(19deg); background: linear-gradient(transparent, #6385d855, transparent); }

.core {
  width: 19%;
  aspect-ratio: 1;
  border: 1px solid #b8c7ff55;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 42% 38%, #fff 0 2%, #9eeeff 7%, #776bea 26%, #1b214d 52%, #070a19 72%);
  box-shadow: 0 0 28px #74dfff66, 0 0 90px #745cff33;
}

.core span {
  position: absolute;
  inset: -12%;
  border: 1px dashed #a7cfff55;
  border-radius: 50%;
  animation: spin 20s linear infinite;
}

.point {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border: 1px solid #8de9ff99;
  border-radius: 50%;
  color: #dff9ff;
  background: #0c1830;
  box-shadow: 0 0 22px #63d9ff55;
  font: 800 10px/1 ui-monospace, monospace;
}

.point-origin { transform: translate(-255%, -230%); }
.point-destination { transform: translate(165%, 140%); border-color: #bd9cffaa; box-shadow: 0 0 22px #a476ff55; }

figcaption {
  position: absolute;
  right: 2%;
  bottom: 4%;
  color: #7785a1;
  font: 600 10px/1.7 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .12em;
  text-align: right;
  text-transform: uppercase;
}

footer { align-self: end; }

@keyframes orbit {
  to { transform: rotate(360deg); }
}

@keyframes spin {
  to { transform: rotate(-360deg); }
}

@media (max-width: 900px) {
  .page-shell { width: min(100% - 40px, 720px); }
  .hero { grid-template-columns: 1fr; padding: 72px 0 50px; }
  .diagram { width: min(100%, 500px); }
}

@media (max-width: 560px) {
  .page-shell { width: min(100% - 28px, 720px); padding-top: 22px; }
  .topline p { display: none; }
  .hero { gap: 44px; padding-top: 62px; }
  h1 { font-size: clamp(43px, 14vw, 66px); }
  .lead { font-size: 15px; line-height: 1.65; }
  .definition { grid-template-columns: 1fr; border-radius: 18px; }
  .definition span { width: fit-content; }
  .diagram { width: 108%; margin-left: -4%; }
  figcaption { right: 5%; }
  footer { flex-wrap: wrap; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .orbit::after,
  .core span { animation: none; }
}