:root {
  --bg: #0f1115;
  --panel: #171a21;
  --text: #e8eaf0;
  --muted: #a8afbd;
  --line: #2a303b;
  --accent: #c9d4ff;
  --max: 920px;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

body {
  margin: 0;
  background: var(--bg);
}

header {
  border-bottom: 1px solid var(--line);
}

nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.15rem 1.25rem;
  display: flex;
  gap: 1.25rem;
  align-items: center;
  flex-wrap: wrap;
}

nav .brand {
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-right: auto;
}

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

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

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4rem 1.25rem 5rem;
}

.hero {
  padding: 2rem 0 1rem;
}

h1, h2, h3 {
  line-height: 1.2;
  margin-top: 2rem;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 5rem);
  letter-spacing: -0.04em;
  margin-top: 0;
  margin-bottom: 0.6rem;
}

h2 {
  font-size: 1.5rem;
}

.lead {
  color: var(--muted);
  font-size: 1.2rem;
  max-width: 760px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.35rem 1.45rem;
  margin: 1.2rem 0;
}

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

ul {
  padding-left: 1.25rem;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}

footer div {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.4rem 1.25rem 2rem;
  font-size: 0.92rem;
}