:root {
  color-scheme: dark;
  --background: #02050c;
  --surface: #071e42;
  --surface-soft: #0c2854;
  --text: #f5f7fb;
  --muted: #bdc7d8;
  --gold: #ffc400;
  --line: rgba(255, 255, 255, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(255, 196, 0, 0.08), transparent 34rem),
    var(--background);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

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

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(2, 5, 12, 0.88);
  backdrop-filter: blur(16px);
}

header .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

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

nav a {
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
}

main {
  padding: 64px 0 88px;
}

.eyebrow {
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
}

h1 {
  max-width: 760px;
  margin: 14px 0 12px;
  font-size: clamp(2.2rem, 7vw, 4.5rem);
}

h2 {
  margin-top: 42px;
  font-size: clamp(1.45rem, 4vw, 2rem);
}

h3 {
  margin-top: 28px;
  font-size: 1.1rem;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.1rem;
}

.meta,
.note {
  color: var(--muted);
}

.card {
  margin-top: 32px;
  padding: clamp(22px, 5vw, 40px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, var(--surface), rgba(7, 30, 66, 0.68));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
}

.callout {
  margin: 26px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--gold);
  border-radius: 0 12px 12px 0;
  background: var(--surface-soft);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 14px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--gold);
  color: #071426;
  font-weight: 800;
  text-decoration: none;
}

.language-divider {
  margin: 64px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
}

footer {
  padding: 30px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  header .shell {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  main {
    padding-top: 42px;
  }
}