/* Shared Crvvi marketing-site styles. Light/dark via prefers-color-scheme.
   Mirrors the iOS app's warm cream theme. No external assets, no JS. */

:root {
  --bg: #FAF7F0;
  --surface: #FFFFFF;
  --surface-dim: #F2EBDA;
  --border: #E8E2D2;
  --text: #1A1612;
  --muted: #7A6E5B;
  --accent: #C8523E;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1A1612;
    --surface: #221C16;
    --surface-dim: #2A231C;
    --border: #322820;
    --text: #F4EEDF;
    --muted: #9C8E78;
    --accent: #E07458;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

.nav {
  max-width: 680px;
  margin: 0 auto;
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav .brand {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.3px;
  color: var(--text);
  text-decoration: none;
}

.nav .links {
  display: flex;
  gap: 18px;
}

.nav .links a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  font-weight: 500;
}

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

.kicker {
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

h1 {
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -1px;
  margin: 0 0 10px;
  font-weight: 600;
}

h2 {
  font-size: 22px;
  letter-spacing: -0.4px;
  margin: 28px 0 10px;
  font-weight: 700;
}

h3 {
  font-size: 16px;
  letter-spacing: -0.2px;
  margin: 18px 0 6px;
  font-weight: 700;
}

p {
  color: var(--muted);
  margin: 0 0 14px;
}

p.lead {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 24px;
  max-width: 520px;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

a:hover {
  opacity: 0.85;
}

section.card {
  margin-top: 28px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}

section.card h2 {
  margin-top: 0;
}

.contact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.contact a {
  font-weight: 600;
  font-size: 18px;
}

.contact span {
  color: var(--muted);
  font-size: 13px;
}

details {
  border-top: 1px solid var(--border);
  padding: 14px 0 4px;
}

details:first-of-type {
  border-top: 0;
  padding-top: 0;
}

details summary {
  font-weight: 600;
  cursor: pointer;
  padding: 4px 0;
  color: var(--text);
  list-style: none;
}

details summary::-webkit-details-marker { display: none; }

details summary::after {
  content: '+';
  float: right;
  color: var(--muted);
  font-weight: 400;
  font-size: 20px;
  transform: translateY(-3px);
}

details[open] summary::after { content: '−'; }

details p {
  color: var(--muted);
  margin: 8px 0 14px;
  font-size: 15px;
}

ol, ul {
  color: var(--muted);
  padding-left: 20px;
  margin: 6px 0 14px;
}

ol li, ul li { margin: 4px 0; }

article p { color: var(--text); }
article p.muted { color: var(--muted); }

article ul li, article ol li { color: var(--text); }

strong { color: var(--text); }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-block;
  padding: 14px 22px;
  background: var(--text);
  color: var(--bg);
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border: 0;
}

.btn.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

footer {
  max-width: 680px;
  margin: 24px auto 0;
  padding: 28px 24px 36px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--muted);
}

footer .links {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-bottom: 8px;
}

.updated {
  color: var(--muted);
  font-size: 13px;
  margin-top: -4px;
  margin-bottom: 18px;
}