:root {
  color-scheme: dark;
  --ink: #f3f4f6;
  --muted: #a8b0bb;
  --quiet: #6b7280;
  --ground: #111315;
  --panel: #181b1f;
  --line: rgba(255, 255, 255, 0.08);
  --accent: #00f0d4;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--ground);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 72% -12%, rgba(0, 240, 212, 0.16), transparent 30rem),
    var(--ground);
  font-family: "Avenir Next", Avenir, "Helvetica Neue", sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 3px;
}

.shell {
  width: min(100% - 40px, 780px);
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 650;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: var(--ground);
  background: var(--accent);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 800;
}

nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--ink);
}

main {
  padding: clamp(72px, 12vw, 128px) 0 96px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  text-wrap: balance;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(46px, 8vw, 76px);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.lede {
  max-width: 640px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(19px, 3vw, 23px);
  line-height: 1.55;
}

.promise {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  margin: 52px 0 72px;
  padding: 22px 24px;
  border: 1px solid rgba(0, 240, 212, 0.18);
  border-radius: 18px;
  background: rgba(0, 240, 212, 0.05);
}

.pulse {
  width: 8px;
  height: 8px;
  margin-top: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 18px var(--accent);
}

.promise p {
  margin: 0;
}

.content {
  max-width: 680px;
}

.content section {
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 12px;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

p,
ul,
ol {
  margin-top: 0;
  color: var(--muted);
}

li + li {
  margin-top: 8px;
}

strong {
  color: var(--ink);
}

.meta {
  margin-top: 18px;
  color: var(--quiet);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 13px;
}

footer p {
  margin: 0;
  color: inherit;
}

@media (max-width: 560px) {
  header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  main {
    padding-top: 64px;
  }

  .promise {
    margin-bottom: 56px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  main {
    animation: arrive 500ms ease-out both;
  }

  @keyframes arrive {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
  }
}