/* nevis.codes — placeholder stylesheet (spec nevis/001 D3).
   Minimal neutral theme: system-ui stack, centered 720px column,
   styled header/nav with hover states, small footer. */

:root {
  --bg: #101418;
  --fg: #e8e6e3;
  --muted: #9aa3ad;
  --accent: #7fb4a2;
  --link: #9ec9e8;
  --border: #2a3138;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  padding: 2.5rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

header .tagline {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

nav {
  margin-top: 1.25rem;
  display: flex;
  gap: 1.25rem;
}

nav a {
  color: var(--link);
  text-decoration: none;
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

nav a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

main h2 {
  font-size: 1.25rem;
  margin-top: 0;
}

main a {
  color: var(--link);
}

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

footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

footer p {
  margin: 0;
}