body {
  font-family: Arial, sans-serif;
  margin: 40px;
  background: #f7f7f7;
}
h1, h2 {
  color: #b30000;
}
.card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  max-width: 600px;
  margin: 30px auto;
}
label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}
textarea, select, input {
  width: 100%;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #ccc;
}
button {
  margin-top: 20px;
  background: #b30000;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 6px;
  cursor: pointer;
}
button:hover {
  background: #e00000;
}
#chartContainer {
  margin-top: 40px;
}