:root {
  --primary: #4F46E5;
  --primary-light: #E0E7FF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --bg: #ffffff;
  --bg-alt: #F9FAFB;
  --border: #E5E7EB;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

header .wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

header a.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

header nav {
  display: flex;
  gap: 24px;
}

header nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}

header nav a:hover {
  color: var(--primary);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
}

p, ul, ol, table {
  margin-bottom: 14px;
  font-size: 16px;
  color: var(--text);
}

ul, ol {
  padding-left: 24px;
}

li {
  margin-bottom: 4px;
}

a {
  color: var(--primary);
  text-decoration: underline;
}

a:hover {
  text-decoration: none;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

th, td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  font-size: 15px;
}

th {
  background: var(--bg-alt);
  font-weight: 600;
}

strong {
  font-weight: 700;
}

code {
  background: var(--bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, Menlo, Monaco, "Cascadia Mono", "Roboto Mono", monospace;
  font-size: 14px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 60px;
}

footer a {
  color: var(--text-secondary);
  margin: 0 10px;
}

/* Landing-specific */
.hero {
  text-align: center;
  padding: 60px 0 40px;
}

.hero h1 {
  font-size: 44px;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 32px;
}

.badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
}

.badge {
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 40px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.15s;
  display: block;
}

.card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.08);
}

.card h3 {
  margin-top: 0;
  color: var(--primary);
}

.card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.mailto-cta {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  margin: 16px 0;
  transition: opacity 0.15s;
}

.mailto-cta:hover {
  opacity: 0.9;
  text-decoration: none;
}

@media (max-width: 600px) {
  h1 { font-size: 28px; }
  .hero h1 { font-size: 32px; }
  header nav { gap: 14px; }
  header nav a { font-size: 13px; }
}