* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: #f4f6f8;
  color: #333;
  transition: 0.3s;
}

.dark {
  background: #121212;
  color: #e0e0e0;
}

header {
  background: #0a66c2;
  color: white;
  text-align: center;
  padding: 30px;
}

.toggle-btn {
  margin-top: 10px;
  padding: 8px 15px;
  border: none;
  cursor: pointer;
  border-radius: 5px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  padding: 15px;
  background: white;
}

nav a {
  text-decoration: none;
  color: #0a66c2;
  font-weight: bold;
}

section {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
}

h2 {
  margin-bottom: 15px;
  color: #0a66c2;
}

.search {
  padding: 10px;
  width: 100%;
  margin-bottom: 15px;
}

ul {
  margin-left: 20px;
}

.stats-box {
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.stats-box div {
  background: #0a66c2;
  color: white;
  padding: 20px;
  border-radius: 10px;
  width: 150px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  background: #0a66c2;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 15px;
}