* {
  box-sizing: border-box;
}
body {
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(to right, #f0f4ff, #e8f0fe);
  color: #333;
  padding: 20px;
  margin: 0;
}
h1,
h2 {
  text-align: center;
  color: #2c3e50;
}
.container {
  max-width: 600px;
  margin: auto;
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}
label {
  font-weight: bold;
  display: block;
  margin-bottom: 5px;
}
input[type="text"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 5px;
  border: 1px solid #ccc;
  border-radius: 8px;
}
.claim-block {
  margin-bottom: 20px;
}
.truth-check {
  margin-top: 5px;
}
input[type="checkbox"] {
  margin-right: 5px;
}
button {
  background-color: #4a90e2;
  color: white;
  border: none;
  padding: 12px 20px;
  font-size: 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
  margin-top: 10px;
}
button:hover {
  background-color: #357ab7;
}
.hidden {
  display: none;
}
.claim-button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px;
  margin-bottom: 10px;
  border: 2px solid #ccc;
  background: #f9f9f9;
  border-radius: 8px;
  transition: background 0.3s, border-color 0.3s;
  cursor: pointer;
}
.claim-button.correct {
  background: #d4edda;
  border-color: #28a745;
  color: #155724;
}
.claim-button.wrong {
  background: #f8d7da;
  border-color: #dc3545;
  color: #721c24;
}
#quiz-feedback {
  margin-top: 15px;
  font-size: 18px;
}