body {
  font-family: Arial, sans-serif;
  background-color: #f5f7fa;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
  color: #2c3e50;
}

h6 {
  text-align: center;
  color: #7f8c8d;
  margin-top: -10px;
  margin-bottom: 20px;
}

select {
  padding: 10px;
  font-size: 16px;
  margin-bottom: 20px;
  width: 100%;
  max-width: 300px;
}

#reading-text {
  background-color: #eef5ff;
  padding: 15px;
  margin-bottom: 20px;
  border-left: 5px solid #3498db;
  border-radius: 5px;
  font-size: 14px;
}

.option-btn {
  display: block;
  width: 100%;
  text-align: left;
  margin-bottom: 10px;
  padding: 10px 15px;
  font-size: 16px;
  background-color: #ecf0f1;
  border: 2px solid #bdc3c7;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s, border 0.3s;
}

.option-btn:hover {
  background-color: #d0e4f1;
}

.option-btn.selected {
  background-color: #1ca0dd;
  border: 2px solid #ae8c27;
  font-weight: bold;
  color: #2c3e50;
}

#submit-btn {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #2ecc71;
  color: white;
  border: none;
  border-radius: 5px;
  margin-top: 10px;
  cursor: pointer;
  transition: background-color 0.3s;
}

#submit-btn:hover {
  background-color: #27ae60;
}

#feedback {
  margin-top: 10px;
  font-size: 16px;
  font-weight: bold;
}

textarea {
  width: 100%;
  padding: 10px;
  font-size: 15px;
  border-radius: 5px;
  margin-top: 10px;
  border: 1px solid #ccc;
}