body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background: #f4f4f4;
}

h1 {
  text-align: center;
}

.bd-example {
  max-width: 600px;
  margin: 20px auto;
  padding: 15px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.btn {
  padding: 8px 12px;
  font-size: 16px;
  cursor: pointer;
  background-color: #ff0037e5;
  color: white;
  border: none;
  border-radius: 4px;
}

.btn:hover {
  background-color: #bb042bfa;
}

.form-popup-header {
  position: absolute;
  padding: 8px 12px;
  width: 200px;
  background: #ccc;
  font-weight: bold;
  box-shadow: 0 5px 20px 0 rgba(0, 0, 0, 0.1);
  z-index: 999;
}

.form-popup {
  position: absolute;
  padding: 8px 12px;
  width: 200px;
  background: #fff;
  box-shadow: 0 5px 20px 0 rgba(0, 0, 0, 0.1);
  z-index: 999;
}