:root {
  color-scheme: light dark;
  --background: #071735;
  --surface: rgba(15, 40, 82, 0.78);
  --surface-strong: #102b59;
  --text: #f5f8ff;
  --muted: #b9c8e6;
  --accent: #26d7e5;
  --accent-strong: #4f7cff;
  --border: rgba(159, 193, 255, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background: var(--background);
  color: var(--text);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 90% 0%, rgba(18, 221, 219, 0.22), transparent 34rem),
    radial-gradient(circle at 0% 20%, rgba(37, 78, 230, 0.42), transparent 40rem),
    var(--background);
}

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

.page {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 52px;
}

.brand {
  color: var(--text);
  font-size: 17px;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  font-size: 14px;
}

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

.hero {
  margin-bottom: 36px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(38px, 8vw, 68px);
  letter-spacing: -0.055em;
  line-height: 1;
}

.lead {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 3vw, 21px);
  line-height: 1.6;
}

.card {
  margin: 18px 0;
  padding: clamp(20px, 5vw, 32px);
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(18px);
}

h2 {
  margin: 0 0 14px;
  font-size: 23px;
  letter-spacing: -0.025em;
}

h3 {
  margin: 24px 0 8px;
  font-size: 17px;
}

p,
li {
  color: var(--muted);
  line-height: 1.7;
}

ul,
ol {
  padding-left: 22px;
}

.button {
  display: inline-block;
  margin-top: 6px;
  padding: 12px 17px;
  border-radius: 12px;
  color: #001a2a;
  background: linear-gradient(135deg, var(--accent), #5cf0c9);
  font-weight: 750;
  text-decoration: none;
}

.notice {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  color: #d9faff;
  background: rgba(255, 255, 255, 0.09);
}

footer {
  margin-top: 42px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 540px) {
  nav {
    align-items: flex-start;
    margin-bottom: 38px;
  }

  .nav-links {
    max-width: 190px;
    gap: 10px 14px;
  }
}