body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #0f172a;
  color: #e5e7eb;
}

header {
  background-color: #111827;
  padding: 15px;
  border-bottom: 1px solid #1f2937;
}

nav a {
  color: #93c5fd;
  margin-right: 15px;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

.container {
  padding: 20px;
}

.card {
  background-color: #1f2937;
  padding: 15px;
  margin-bottom: 15px;
  border-radius: 8px;
}

button {
  background-color: #2563eb;
  border: none;
  padding: 10px 15px;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #1d4ed8;
}

input, select {
  padding: 8px;
  margin-top: 5px;
  margin-bottom: 10px;
  width: 100%;
  border-radius: 5px;
  border: none;
}