:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #18233d;
  background: #fbfcff;
}

body { margin: 0; }
header, main, footer { max-width: 70rem; margin: 0 auto; padding: 1.25rem; }
header { border-bottom: 1px solid #e4e7f2; }
nav { display: flex; gap: 1.25rem; font-weight: 600; }
nav a { color: #3730a3; text-decoration: none; }
main { min-height: 65vh; padding-top: 5rem; }
.hero { max-width: 44rem; }
h1 { font-size: clamp(2.8rem, 8vw, 5rem); letter-spacing: -0.05em; margin: 0.25rem 0 1rem; }
h2 { margin-top: 2.5rem; }
p { font-size: 1.1rem; line-height: 1.65; }
.eyebrow { color: #5b21b6; font-size: 0.9rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.button { display: inline-block; border-radius: 0.5rem; background: #4338ca; color: white; padding: 0.75rem 1rem; text-decoration: none; font-weight: 700; }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
article { border: 1px solid #e4e7f2; border-radius: 0.75rem; padding: 1.25rem; }
pre { overflow-x: auto; border-radius: 0.5rem; background: #18233d; color: white; padding: 1rem; }
footer { color: #53627a; font-size: 0.9rem; }