/* Logro AI — landing site shared styles
   Dark mercury aesthetic. Single CSS file, no framework.
   Mobile-first; one breakpoint at 720px. */

:root {
  --bg: #000;
  --fg: #fff;
  --fg-secondary: #a1a1aa;
  --fg-muted: #71717a;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #d4d4d8;
  --max-width: 720px;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--fg); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--fg-muted); }
a:hover { text-decoration-color: var(--fg); }

main, header, footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
nav .brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 17px;
}
nav ul { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
nav a { text-decoration: none; color: var(--fg-secondary); font-size: 15px; }
nav a:hover { color: var(--fg); }

/* ---------- Hero ---------- */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}
.hero img.wordmark {
  max-width: 360px;
  width: 80%;
  height: auto;
  margin: 0 auto 32px;
  display: block;
}
.hero h1 {
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 18px;
}
.hero p.lede {
  font-size: 19px;
  color: var(--fg-secondary);
  max-width: 520px;
  margin: 0 auto 36px;
}
.badge {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--fg-secondary);
  letter-spacing: 0.02em;
}

/* ---------- Feature strip ---------- */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 60px 0;
}
@media (min-width: 720px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}
.feature {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
}
.feature h3 { margin: 0 0 8px; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--fg-secondary); font-size: 15px; }

/* ---------- Document pages (privacy, terms, support) ---------- */
.doc {
  padding: 40px 0 80px;
}
.doc h1 {
  font-size: 36px;
  font-weight: 300;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.doc .effective {
  color: var(--fg-muted);
  font-size: 14px;
  margin: 0 0 36px;
}
.doc h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 36px 0 12px;
}
.doc h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 24px 0 8px;
}
.doc p, .doc ul, .doc ol {
  color: var(--fg-secondary);
}
.doc strong { color: var(--fg); font-weight: 600; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin-bottom: 6px; }

/* ---------- Footer ---------- */
footer {
  padding: 40px 24px 60px;
  border-top: 1px solid var(--border);
  margin-top: 60px;
  color: var(--fg-muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: space-between;
  align-items: center;
}
footer a { color: var(--fg-secondary); text-decoration: none; }
footer a:hover { color: var(--fg); }
footer .links { display: flex; gap: 22px; flex-wrap: wrap; }