body {
  font-family: Arial, sans-serif;
  max-width: 900px;
  margin: 20px auto;
}

h1, h2 {
  text-align: center;
}

form {
  border: 1px solid #ccc;
  padding: 15px;
  margin-bottom: 20px;
  border-radius: 5px;
}

label {
  display: block;
  margin-top: 10px;
}

input, textarea, select {
  width: 100%;
  padding: 6px;
  margin-top: 3px;
  box-sizing: border-box;
}

button {
  margin-top: 12px;
  padding: 8px 12px;
  cursor: pointer;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

th, td {
  border: 1px solid #ccc;
  padding: 8px;
  text-align: left;
}

.actions button {
  margin-right: 5px;
}

.message {
  margin-bottom: 15px;
  padding: 10px;
  border-radius: 4px;
  display: none;
}

.message.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}