* {
  box-sizing: border-box;
}


body {
  font-family: sans-serif;
  margin: 2rem;
  background-color: #fdfdfd;
  color: #222;
}

.explore {
  margin-bottom: 3rem;  /* Adjust value as needed */
}

.explore h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid #ddd;
  padding-bottom: 0.5rem;
}

.topic-group {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.topic {
  background: #f9f9f9;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  width: 300px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.topic h3 {
  margin-top: 0;
  font-size: 1.25rem;
  color: #2c3e50;
  border-bottom: 1px solid #ccc;
  padding-bottom: 0.3rem;
}

.topic ul {
  list-style: none;
  padding-left: 0;
  margin: 0.5rem 0 0 0;
}

.topic ul li {
  margin-bottom: 0.5rem;
}

.topic ul li a {
  text-decoration: none;
  color: #007acc;
  transition: color 0.2s;
}

.topic ul li a:hover {
  color: #005b9f;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem;
}


header {
  border-bottom: 1px solid #e1e4e8;
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.title .cl { color: #033e82; }

header h1 {
  margin: 0;
  font-weight: 700;
  font-size: 2.5rem;
  color: #0366d6;
}

header p {
  margin-top: 0.5rem;
  font-size: 1.125rem;
  color: #586069;
}


h2 {
  font-weight: 600;
  color: #24292e;
  margin-top: 0;
  margin-bottom: 1rem;
}


footer {
  border-top: 1px solid #e1e4e8;
  padding: 1.5rem 0;
  margin-top: 3rem;
  text-align: center;
  font-size: 0.9rem;
  color: #586069;
}