body {
  font-family: Arial, sans-serif;
  background-color: #f8fafc;
  margin: 0;
  padding: 40px;
  color: #1e293b;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 20px;
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.05);
}

h1, h2 {
  text-align: center;
}

form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input[type="number"],
input[type="checkbox"] {
  margin-top: 5px;
}

input[type="submit"],
button.btn {
  margin-top: 20px;
  padding: 10px 20px;
  background-color: #0f766e;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button.btn:hover,
input[type="submit"]:hover {
  background-color: #115e59;
}

.card {
  margin-top: 20px;
  padding: 20px;
  background-color: #e2f4f1;
  border-radius: 8px;
}

.mt {
  margin-top: 30px;
}
.button-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 20px;
}