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

body {
  background-color: #191a1b;
  color: #bfbfba;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  padding: 3rem 2rem;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

h1 {
  color: #bfbfba;
  margin-bottom: 1rem;
  font-size: 3rem;
  line-height: 1.2;
}

h2 {
  color: #bfbfba;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

h3 {
  color: #bfbfba;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.2rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: #3994bc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.doc-card {
  background-color: #2a2b2c;
  border: 1px solid #3a3b3c;
  border-radius: 8px;
  padding: 1.5rem;
  transition:
    border-color 0.2s,
    transform 0.2s;
  display: block;
  color: inherit;
  text-decoration: none;
}

.doc-card:hover {
  border-color: #3994bc;
  transform: translateY(-2px);
}

.doc-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: #3994bc;
  font-size: 1.1rem;
}

.doc-card h3 a {
  color: inherit;
}

.doc-card h3 a:hover {
  text-decoration: none;
}

.doc-card p {
  font-size: 0.95rem;
  color: #9a9b9b;
  margin-bottom: 0;
}

.doc-card .tag {
  display: inline-block;
  background-color: #3994bc;
  color: #191a1b;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  margin-top: 0.75rem;
  font-weight: 600;
}

hr {
  border: none;
  border-top: 1px solid #2a2b2c;
  margin: 2rem 0;
}

footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid #2a2b2c;
  font-size: 0.9rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  justify-items: center;
  text-align: center;
}

.footer-section {
  text-align: center;
}

.footer-section h4 {
  color: #bfbfba;
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
  margin-left: 0;
  margin-bottom: 0;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #9a9b9b;
}

.footer-section a:hover {
  color: #3994bc;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #2a2b2c;
  color: #6a6b6c;
}

.footer-bottom p {
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  main {
    padding: 2rem 1.5rem;
  }

  .doc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 400px) {
  main {
    padding: 2rem 1.75rem;
  }

  footer {
    padding: 2rem 1.75rem;
  }
}