:root {
  --primary: #00A38E;
  --primary-dark: #00796B;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-faint: #94A3B8;
  --border: #E2E8F0;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.topbar {
  background: linear-gradient(135deg, #00796B, #00A38E 50%, #23C9B5);
  padding: 28px 20px;
  color: #fff;
}

.topbar-inner {
  max-width: 720px;
  margin: 0 auto;
}

.topbar h1 {
  margin: 0 0 4px;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.5px;
}

.topbar p {
  margin: 0;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}

.topbar .updated {
  margin-top: 10px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

h2 {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-dark);
  margin: 32px 0 10px;
}

h2:first-child {
  margin-top: 0;
}

p {
  font-size: 14.5px;
  color: var(--text-secondary);
  margin: 0 0 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  margin: 16px 0;
}

.card h3 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text);
  margin: 0 0 10px;
}

.card ul {
  margin: 0;
  padding-left: 20px;
}

.card li {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.card li:last-child {
  margin-bottom: 0;
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 40px;
  font-size: 12px;
  color: var(--text-faint);
  text-align: center;
}

a {
  color: var(--primary);
}

/* Landing page */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 20px 0;
}

.nav .wordmark {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--text);
  text-decoration: none;
}

.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 56px 20px 40px;
  text-align: center;
}

.hero h1 {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -1px;
  margin: 0 0 14px;
  background: linear-gradient(135deg, #00796B, #00A38E 60%, #23C9B5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 28px;
}

.hero .actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-secondary);
}

.hero .actions span {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 600;
}

.features {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 20px 48px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 640px) {
  .features {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 30px;
  }
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  margin: 0;
}

.about {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.about p {
  font-size: 14px;
  margin: 0 auto;
}

footer .links {
  margin-bottom: 10px;
}

footer .links a {
  margin: 0 8px;
  font-weight: 600;
}