:root {
  --text: #111827;
  --muted: #6B7280;
  --accent: #367BD6;
  --accent-hover: #2563B4;
  --rule: #E5E7EB;
  --bg: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px 80px;
}

.intro {
  max-width: 520px;
  margin-left: 8%;
}

.content {
  max-width: 620px;
  margin-left: 28%;
  margin-top: 80px;
}

h1 {
  font-size: 64px;
  font-weight: 600;
  letter-spacing: -1px;
  margin: 0;
  line-height: 1.05;
}

h3 {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 400;
  color: var(--muted);
}

h2 {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--muted);
  margin: 0 0 24px;
}

p {
  font-size: 18px;
  margin: 16px 0;
}

/* unified link styling */
a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(79, 70, 229, 0.35);
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration-color: var(--accent-hover);
}

.rule {
  width: 40px;
  height: 1px;
  background: var(--rule);
  margin: 32px 0;
}

.footer {
  margin-top: 60px;
  font-size: 14px;
  color: var(--muted);
}

.links {
  margin-bottom: 10px;
}

.links a {
  margin-right: 18px;
}

@media (max-width: 900px) {
  .intro,
  .content {
    margin-left: 0;
    max-width: 640px;
  }

  .content {
    margin-top: 60px;
  }

  .wrap {
    padding: 80px 24px;
  }

  h1 {
    font-size: 48px;
  }
}