body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background: #f9f9f9;
}

header {
  background-color: #333;
  color: white;
  padding: 1rem;
}

header h1 {
  margin: 0;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  color: white;
  margin-right: 1rem;
  text-decoration: none;
}

main {
  padding: 1rem;
  max-width: 800px;
  margin: auto;
}

form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

input, select, button {
  padding: 0.5rem;
  font-size: 1rem;
}

button {
  background: #007bff;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  background-color: white;
}

th, td {
  border: 1px solid #ddd;
  padding: 0.75rem;
  text-align: left;
}

@media (max-width: 600px) {
  form {
    flex-direction: column;
  }
}