:root {
  --blue: #1CB0F6;
  --blue-dark: #0895CF;
  --blue-light: #DDF4FF;
  --orange: #FF9600;
  --ink: #3C3C3C;
  --sub: #777777;
  --border: #E5E5E5;
  --bg: #FFFFFF;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  /* Larger base size on purpose: Sage's audience skews older. */
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }

/* ── header ── */
.site-header {
  background: var(--blue-light);
  padding: 40px 0 36px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.site-header img { width: 112px; height: 112px; display: block; margin: 0 auto 10px; }
.site-header .brand {
  font-size: 40px; font-weight: 800; color: var(--blue);
  letter-spacing: -1px; line-height: 1;
}
.site-header .tag { font-size: 18px; color: var(--sub); margin-top: 8px; font-weight: 500; }

/* ── home cards ── */
.cards { display: grid; gap: 16px; margin: 36px 0 8px; }
@media (min-width: 640px) { .cards { grid-template-columns: 1fr 1fr; } }

.card {
  display: block;
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  text-decoration: none;
  color: inherit;
  background: #fff;
  box-shadow: 0 2px 8px rgba(60, 60, 60, 0.07);
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--blue); transform: translateY(-2px); }
.card h2 { font-size: 22px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.card p { font-size: 16px; color: var(--sub); }
.card .go { color: var(--blue); font-weight: 700; font-size: 16px; margin-top: 10px; display: inline-block; }

/* ── content pages ── */
main { padding: 44px 0 72px; }
main h1 { font-size: 36px; font-weight: 800; letter-spacing: -0.6px; line-height: 1.2; }
main .updated { color: var(--sub); font-size: 16px; margin-top: 8px; }
main h2 {
  font-size: 24px; font-weight: 800; margin-top: 36px; margin-bottom: 10px;
  letter-spacing: -0.3px;
}
main p { margin-bottom: 14px; }
main ul { margin: 0 0 16px 22px; }
main li { margin-bottom: 8px; }
main a { color: var(--blue-dark); }
main strong { font-weight: 700; }

.lede {
  font-size: 19px;
  background: var(--blue-light);
  border-radius: 14px;
  padding: 18px 20px;
  margin: 24px 0 8px;
}

.callout {
  border-left: 4px solid var(--orange);
  background: #FFF6EC;
  border-radius: 0 12px 12px 0;
  padding: 16px 18px;
  margin: 20px 0;
}
.callout p:last-child { margin-bottom: 0; }

.back {
  display: inline-block; margin-bottom: 28px;
  color: var(--blue-dark); font-weight: 700; text-decoration: none; font-size: 16px;
}
.back:hover { text-decoration: underline; }

/* ── footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  text-align: center;
  color: var(--sub);
  font-size: 15px;
}
.site-footer a { color: var(--blue-dark); text-decoration: none; font-weight: 600; }
.site-footer a:hover { text-decoration: underline; }
.site-footer .links { margin-bottom: 8px; }
.site-footer .links a { margin: 0 8px; }