/* The NEXUS site shares the app's tokens: black surfaces, thin grey borders and one
   blue accent. The one loud thing is the 3D logo; the rest stays quiet. */

@font-face {
  font-family: "Oxanium";
  src: url("assets/fonts/oxanium-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 200 800;
  font-display: swap;
}

:root {
  --mask: #141414;
  --mask-deep: #0d0d0d;
  --line: #303030;
  --line-strong: #434343;
  --accent: #1668c7;
  --accent-hover: #1259ab;
  --accent-text: #58a6f0;
  --silk: #e8e8e8;
  --dim: #b3b3b3;
  --page: min(1180px, 100% - 48px);
  --display: "Oxanium", "Segoe UI", sans-serif;
  --body: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--mask);
  color: var(--silk);
  font: 400 1.0625rem/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  z-index: 10;
}
.skip:focus {
  left: 8px;
}

h1,
h2 {
  font-family: var(--display);
  margin: 0;
}

/* Header */
.top {
  width: var(--page);
  margin: 0 auto;
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  text-decoration: none;
}
.top nav {
  display: flex;
  gap: 24px;
}
.top nav a {
  color: var(--dim);
  text-decoration: none;
  padding: 10px 0;
}
.top nav a:hover {
  color: var(--silk);
  text-decoration: underline;
  text-decoration-color: var(--accent-text);
  text-underline-offset: 6px;
}

/* Hero */
.hero {
  width: var(--page);
  margin: 0 auto;
  padding: 40px 0 72px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  align-items: center;
  gap: 32px;
}
.hero h1 {
  font-size: clamp(3rem, 7.2vw, 6.25rem);
  font-weight: 700;
  line-height: 0.98;
  max-width: 11ch;
}
.hero p {
  max-width: 46ch;
  margin: 24px 0 32px;
  color: var(--dim);
  font-size: 1.1875rem;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 22px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-weight: 600;
  text-decoration: none;
  transition: background 160ms ease, border-color 160ms ease;
}
.btn:hover {
  border-color: var(--silk);
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.hero-chip {
  position: relative;
  aspect-ratio: 1;
  width: 100%;
  max-width: 480px;
  justify-self: end;
}
.hero-chip canvas {
  position: absolute;
  inset: -12%;
  width: 124% !important;
  height: 124% !important;
  opacity: 0;
  transition: opacity 500ms ease;
}
.chip-fallback {
  width: 76%;
  margin: 12%;
  transition: opacity 500ms ease;
}
.hero-chip.live canvas {
  opacity: 1;
}
.hero-chip.live .chip-fallback {
  opacity: 0;
}

/* Product shot, sitting on the seam between the hero and the page */
.showcase {
  width: var(--page);
  margin: 0 auto;
}
.showcase img,
.feature img {
  border: 1px solid var(--line);
  border-radius: 3px;
}

/* Features */
.feature {
  width: var(--page);
  margin: 0 auto;
  padding: 104px 0 0;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: center;
  gap: 56px;
}
.feature.flip .copy {
  order: 2;
}
.feature h2,
.tools h2,
.open h2,
.get h2 {
  font-size: clamp(2rem, 3.4vw, 2.875rem);
  font-weight: 650;
  line-height: 1.08;
}
.feature p {
  margin: 16px 0;
  color: var(--dim);
}
.feature ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.feature li {
  position: relative;
  padding: 8px 0 8px 20px;
  border-top: 1px solid var(--line);
}
/* A small blue square marks each point. */
.feature li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 7px;
  height: 7px;
  background: var(--accent-text);
}

/* Everything else: one darker band. */
.tools {
  margin-top: 120px;
  padding: 88px max(24px, calc((100% - 1180px) / 2));
  background: var(--mask-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.tools dl {
  margin: 40px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 40px;
}
.tools dl > div {
  padding: 18px 0 24px;
  border-top: 1px solid var(--line);
}
.tools dt {
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 600;
}
.tools dd {
  margin: 6px 0 0;
  color: var(--dim);
}

/* Open source and download */
.open,
.get {
  width: var(--page);
  margin: 0 auto;
  padding: 104px 0 0;
}
.get {
  padding-bottom: 104px;
}
.open p,
.get p {
  max-width: 60ch;
  margin: 16px 0 0;
  color: var(--dim);
}
.open .actions,
.get .actions {
  margin-top: 28px;
}

footer {
  width: var(--page);
  margin: 0 auto;
  padding: 24px 0 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.875rem;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 24px 0 48px;
  }
  .hero-chip {
    max-width: 280px;
    justify-self: start;
    order: -1;
  }
  .feature,
  .feature.flip {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 72px;
  }
  .feature.flip .copy {
    order: 0;
  }
  .tools {
    margin-top: 80px;
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .tools dl {
    grid-template-columns: 1fr;
  }
  .open,
  .get {
    padding-top: 72px;
  }
  .get {
    padding-bottom: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition-duration: 1ms !important;
  }
}