/* Minimal, readable, brand-consistent. No frameworks, no JS. */

:root {
  --brand: #2ef961;
  --bg: #0c0d0f;
  --surface: #15171a;
  --text: #ececec;
  --text-secondary: #9da3a9;
  --border: rgba(255, 255, 255, 0.08);
  --max-width: 720px;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

main.landing {
  padding-top: 96px;
}

header h1 {
  font-size: 56px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--brand), color-mix(in srgb, var(--brand) 55%, transparent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 0 0 16px;
}

.tagline {
  font-size: 22px;
  color: var(--text-secondary);
  margin: 0 0 56px;
  max-width: 36ch;
}

h1 {
  font-size: 32px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  margin: 40px 0 12px;
  letter-spacing: -0.005em;
}

h3 {
  font-size: 17px;
  margin: 24px 0 8px;
  color: var(--text);
}

p {
  margin: 0 0 16px;
  color: var(--text);
}

p.meta {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
}

ul {
  margin: 0 0 16px;
  padding-left: 20px;
}

li {
  margin: 6px 0;
}

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

a:hover, a:focus {
  text-decoration: underline;
}

a.back {
  display: inline-block;
  margin-bottom: 24px;
  font-size: 15px;
  color: var(--text-secondary);
}

a.back:hover {
  color: var(--text);
}

code {
  font-family: "SF Mono", ui-monospace, Consolas, monospace;
  font-size: 14px;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

strong { color: var(--text); }
em { color: var(--text); font-style: italic; }

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  header h1 { font-size: 44px; }
  .tagline { font-size: 19px; }
  main { padding: 32px 20px 48px; }
  main.landing { padding-top: 56px; }
}