* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  max-width: 920px;
  margin: 0 auto;
  padding: 32px 20px 80px 20px;
  line-height: 1.75;
  color: #111;
  background: #fff;
}

/* Navigation */

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 56px;
  padding-bottom: 18px;
  border-bottom: 1px solid #e5e5e5;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-left a {
  font-size: 20px;
  font-weight: bold;
  text-decoration: none;
  color: black;
  letter-spacing: -0.3px;
}

.nav-right {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-right a {
  text-decoration: none;
  color: #444;
  transition: opacity 0.15s ease;
}

.nav-right a:hover {
  text-decoration: underline;
  opacity: 0.7;
}

/* Hero */

.hero {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid #eaeaea;
}

/* Typography */

h1 {
  font-size: 42px;
  line-height: 1.15;
  margin-bottom: 10px;
  letter-spacing: -1px;
}

h2 {
  font-size: 28px;
  margin-top: 56px;
  margin-bottom: 16px;
  line-height: 1.3;
}

h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 10px;
  line-height: 1.4;
}

.tagline {
  font-size: 20px;
  color: #222;
  margin-bottom: 10px;
  max-width: 720px;
}

.sub {
  color: #555;
  margin-bottom: 8px;
}

p {
  margin-bottom: 18px;
}

/* Sections */

section {
  margin-bottom: 42px;
}

ul {
  padding-left: 24px;
}

li {
  margin-bottom: 10px;
}

/* Cards */

.card {
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 26px;
  margin-top: 24px;
  transition: border-color 0.15s ease;
}

.card:hover {
  border-color: #cfcfcf;
}

/* CTA */

.cta {
  background: #f5f5f5;
  padding: 28px;
  border-radius: 12px;
}

/* Contact */

.contact-box {
  border: 1px solid #e5e5e5;
  border-radius: 10px;
  padding: 24px;
  margin-top: 24px;
}

/* Articles */

.article-preview {
  border-bottom: 1px solid #eee;
  padding-bottom: 22px;
  margin-bottom: 22px;
}

/* Footer */

.footer {
  margin-top: 80px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
  color: #666;
  font-size: 15px;
}

/* Links */

a {
  color: black;
}

a:hover {
  opacity: 0.75;
}

/* Responsive */

@media (max-width: 768px) {

  body {
    padding-top: 20px;
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    align-items: flex-start;
  }

  .hero img {
    width: 96px;
    height: 96px;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 24px;
  }

  .tagline {
    font-size: 18px;
  }

  .nav {
    margin-bottom: 42px;
  }

}