.quiz-container .articles-container {
  margin-top: 40px;
}

.question-block {
  margin-bottom: 40px;
  padding: 20px;
  border-radius: 8px;
  border: none;
  width: 88%;
  box-sizing: border-box;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  margin: 0 auto;
}

.quiz-container .introduction {
  max-width: 88%;
  margin: 0 auto;
}

.question-text {
  font-size: 1em;
  color: #2c3e50;
  margin-bottom: 20px;
  border-bottom: solid 1px #e3e9f5;
  padding: 0 10px;
  font-weight: 600;
}

.question-block pre {
  margin-top: 0;
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-label {
  display: flex;
  align-items: flex-start;
  background-color: #e3e9f52d;
  padding: 10px 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  border: 1px solid transparent;
  position: relative;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.option-label.selected-correct {
  background-color: #e6ffed;
  border-color: #28a745;
}
.option-label.selected-incorrect {
  background-color: #ffe6e6;
  border-color: #dc3545;
}

.option-content {
  display: flex;
  align-items: center;
  width: 100%;
  flex-wrap: nowrap;
  min-width: 0;
}

.option-letter {
  font-weight: bold;
  margin-right: 15px;
  min-width: 20px;
  text-align: right;
  color: #555;
}

.option-label input[type="radio"] {
  margin-right: 15px;
  transform: scale(1.2);
  cursor: pointer;
  flex-shrink: 0;
}

.option-text {
  flex: 1 1 0%;
  min-width: 0;
  white-space: normal;
  overflow-wrap: break-word;
  color: #333;
}

.rationale-container {
  width: 100%;
  margin-top: 10px;
  padding-left: 50px;
  box-sizing: border-box;
  display: none;
}

.rationale-text .code-explain,
.option-text .code-explain {
  color: inherit;
}
.rationale-text {
  font-size: 0.9em;
  color: #555;
}
.rationale-header {
  font-weight: bold;
  display: flex;
  align-items: center;
  margin-bottom: 5px;
  color: #28a745;
}
.rationale-header i {
  margin-right: 8px;
  color: #28a745;
  font-size: 1.1em;
}

.option-label.selected .rationale-container,
.option-label.display-correct .rationale-container {
  display: block;
}
.option-label.display-correct {
  background-color: #e6ffed;
  border-color: #28a745;
}

#quiz-result {
  display: none;
  max-width: 88%;
  margin: 30px auto 60px;
  padding: 20px;
  border-radius: 8px;
  background-color: #f0f4f8;
  color: #2c3e50;
  font-weight: 600;
  font-size: 1.2em;
  box-shadow: 0 2px 8px rgb(0 0 0 / 0.1);
  text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
  .quiz-container {
    padding: 10px 0;
    max-width: 100vw;
    width: 100%;
    box-sizing: border-box;
  }
  .quiz-container .introduction {
    max-width: 100%;
  }
  .question-block {
    margin-bottom: 20px;
    padding: 10px 5px;
    max-width: 100vw;
    width: 100%;
    box-sizing: border-box;
  }
  .options-container {
    gap: 6px;
  }
  .option-label {
    padding: 10px 8px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }
  .option-content {
    flex-wrap: wrap;
  }
  .rationale-container {
    padding-left: 20px;
    width: 100%;
    box-sizing: border-box;
  }
}

@media (max-width: 480px) {
  .quiz-container {
    padding: 10px;
    max-width: 100vw;
    width: 100%;
  }
  .question-block {
    margin-bottom: 15px;
    padding: 6px 2px;
    max-width: 100vw;
    width: 100%;
  }
  .option-label {
    padding: 7px 4px;
    width: 100%;
    max-width: 100%;
  }
  .rationale-container {
    padding-left: 10px;
    width: 100%;
  }
}