:root {
  color-scheme: light dark;
  --background: #08110f;
  --surface: #111c19;
  --surface-raised: #172520;
  --border: #2a3d36;
  --text: #eff8f5;
  --muted: #a4b7b0;
  --accent: #36c99b;
  --accent-dark: #087a67;
}

* {
  box-sizing: border-box;
}

html {
  font:
    16px/1.65 ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(
      circle at 85% 0,
      rgba(54, 201, 155, 0.15),
      transparent 32rem
    ),
    var(--background);
}

a {
  color: var(--accent);
}

header,
main,
footer {
  width: min(880px, calc(100% - 36px));
  margin-inline: auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 30px 0 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
}

.brand img {
  width: 48px;
  height: 48px;
}

nav {
  display: flex;
  gap: 18px;
}

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

nav a:hover {
  color: var(--text);
}

main {
  padding: 52px 0 70px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.15;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 760px;
  margin: 12px 0 22px;
  font-size: clamp(2.35rem, 7vw, 4.6rem);
}

h2 {
  margin-top: 42px;
  font-size: 1.55rem;
}

p,
li {
  color: var(--muted);
}

.lead {
  max-width: 720px;
  font-size: 1.17rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  padding: 10px 17px;
  color: #04130e;
  background: var(--accent);
  border-radius: 10px;
  font-weight: 750;
  text-decoration: none;
}

.button.secondary {
  color: var(--text);
  background: var(--surface-raised);
  border: 1px solid var(--border);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 38px;
}

.card,
.notice {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.card strong {
  display: block;
  margin-bottom: 5px;
}

.card p {
  margin: 0;
}

.notice {
  margin: 26px 0;
  border-left: 4px solid var(--accent);
}

code {
  padding: 2px 5px;
  background: var(--surface-raised);
  border-radius: 5px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0 35px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
}

@media (max-width: 650px) {
  header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

  main {
    padding-top: 30px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --background: #f4f8f6;
    --surface: #ffffff;
    --surface-raised: #eaf2ef;
    --border: #cfded8;
    --text: #13221d;
    --muted: #536b62;
    --accent: #087a67;
  }
}