:root {
  color-scheme: dark;
  --ink: #f5f8ff;
  --muted: #aeb8c9;
  --blue: #1688f5;
  --panel: #0d1422;
  --line: #223451;
  --background: #030712;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgba(22, 136, 245, 0.16), transparent 36rem),
    var(--background);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.58;
}

a { color: #6db7ff; }
a:hover { color: #b8dcff; }

.site-header,
main,
.site-footer {
  width: min(100% - 40px, 860px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
}

.brand {
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.brand span { color: var(--blue); }

nav {
  display: flex;
  gap: 18px;
  font-size: 0.94rem;
}

nav a { text-decoration: none; }

.hero,
.content {
  margin: 42px 0;
  padding: clamp(28px, 6vw, 58px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(18, 31, 53, 0.94), rgba(7, 12, 23, 0.96));
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.24);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1 {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(2.1rem, 7vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

h2 {
  margin-top: 2rem;
  font-size: 1.25rem;
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-block;
  padding: 11px 16px;
  border-radius: 10px;
  background: var(--blue);
  color: #02101f;
  font-weight: 800;
  text-decoration: none;
}

.button.secondary {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}

.notice {
  margin-top: 28px;
  padding: 16px;
  border-left: 3px solid var(--blue);
  border-radius: 8px;
  background: rgba(22, 136, 245, 0.10);
}

.site-footer {
  padding: 0 0 36px;
  color: var(--muted);
  font-size: 0.86rem;
}

.site-footer a { margin-right: 14px; }

@media (max-width: 560px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .site-header, main, .site-footer { width: min(100% - 28px, 860px); }
  .hero, .content { margin: 18px 0 32px; border-radius: 18px; }
}