:root {
  color-scheme: dark;
  --bg: #081016;
  --panel: #111b24;
  --text: #edf5f7;
  --muted: #aab7c4;
  --accent: #6ee7b7;
  --line: rgba(255, 255, 255, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, rgba(110, 231, 183, 0.18), transparent 32rem), var(--bg);
  color: var(--text);
  line-height: 1.65;
}

main {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0;
}

header {
  padding: 48px 0 32px;
}

nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 24px;
}

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

a:hover {
  text-decoration: underline;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 8vw, 72px);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin: 36px 0 12px;
  font-size: 26px;
}

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

.lead {
  max-width: 680px;
  font-size: 19px;
  color: #dce8ed;
}

.panel {
  margin-top: 24px;
  padding: 24px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid rgba(110, 231, 183, 0.45);
  border-radius: 8px;
  color: var(--accent);
  font-weight: 700;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}