body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f8fafc;
}

.header {
  background: #0f172a;
  color: white;
  padding: 1rem;
}

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

main {
  padding: 1rem;
}

.card {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.submit-button {
  border-radius: 5px;
  padding: 5px 15px;
  background-color: #2563eb;
  color: white;
  border: 1px solid #062e83;
  cursor: pointer;
}

/* Mobile improvements */
@media (max-width: 768px) {
  table {
    font-size: 0.9rem;
  }

  .card {
    padding: 0.75rem;
  }

  button {
    padding: 8px 12px;
  }
}