body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f7fa;
}
header {
  background: #1a73e8;
  color: white;
  padding: 30px;
  text-align: center;
}
nav {
  background: white;
  padding: 10px;
  text-align: center;
}
nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #1a73e8;
  font-weight: bold;
}
main {
  padding: 30px;
}
.card {
  background: white;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.btn {
  display: inline-block;
  padding: 10px 16px;
  background: #1a73e8;
  color: white;
  border-radius: 6px;
  text-decoration: none;
}
.list {
  background: white;
  padding: 20px;
  border-radius: 10px;
}
.list a {
  color: #1a73e8;
  text-decoration: none;
  font-weight: bold;
}
footer {
  text-align: center;
  padding: 15px;
  background: #eee;
}