:root {
  --bg: #ffffff;
  --text: #0f172a; /* slate-900 */
  --muted: #475569; /* slate-600 */
  --accent: #0ea5e9; /* sky-500 */
  --accent-dark: #0284c7; /* sky-600 */
  --border: #e2e8f0; /* slate-200 */
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

.site-header { border-bottom: 1px solid var(--border); padding: 64px 0 40px; background: linear-gradient(to bottom, rgba(14, 165, 233, 0.02) 0%, transparent 100%); }
.brand { font-size: 40px; line-height: 1.2; margin: 0; letter-spacing: 0.02em; }
.tagline { margin: 12px 0 24px; color: var(--muted); font-size: 18px; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.button {
  display: inline-block;
  padding: 12px 20px;
  border: 2px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  background: #fff;
  font-weight: 500;
  transition: all 0.2s ease;
}
.button:hover, .button:focus-visible {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.15);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.button.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}
.button.primary:hover, .button.primary:focus-visible {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

a:not(.button) {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}
a:not(.button):hover, a:not(.button):focus-visible {
  color: var(--accent-dark);
  text-decoration-color: var(--accent-dark);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  background: rgba(14, 165, 233, 0.02);
  margin-top: 16px;
}
.card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}
.card p {
  margin: 0 0 16px;
  color: var(--text);
}
.card ul {
  margin: 0 0 20px;
  padding-left: 20px;
}
.card li {
  margin: 6px 0;
  color: var(--muted);
}

.section { padding: 48px 0; border-bottom: 1px solid var(--border); }
.section:last-child { border-bottom: none; }
.section h2 { margin: 0 0 12px; font-size: 28px; font-weight: 600; }
.section p { margin: 0 0 12px; color: var(--muted); }
.section ul { margin: 0; padding-left: 18px; }
.section li { margin: 6px 0; }

.site-footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); }
.social-links {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}
.social-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.social-links a:hover {
  color: var(--accent);
}

@media (max-width: 640px) {
  .brand { font-size: 32px; }
  .tagline { font-size: 16px; }
  .section h2 { font-size: 24px; }
  .card { padding: 20px; }
  .card h3 { font-size: 18px; }
  .button { padding: 10px 16px; font-size: 14px; }
  .cta-row { flex-direction: column; gap: 8px; }
  .social-links { gap: 12px; }
}