body { font-family: 'Segoe UI', sans-serif; background-color: #f4f7f6; padding: 20px; }
.container { max-width: 800px; margin: auto; background: white; padding: 30px; border-radius: 10px; box-shadow: 0 4px 8px rgba(0,0,0,0.1); }
h1 { color: #2c3e50; text-align: center; }
.question-card { margin-bottom: 25px; padding: 15px; border-bottom: 1px solid #eee; }
.option { display: block; margin: 10px 0; padding: 10px; border: 1px solid #ddd; border-radius: 5px; cursor: pointer; }
.option:hover { background-color: #e1f5fe; }
.btn { display: block; width: 100%; padding: 15px; background: #27ae60; color: white; border: none; border-radius: 5px; font-size: 18px; cursor: pointer; }
.result { font-size: 24px; font-weight: bold; text-align: center; margin-top: 20px; }
.explanation { font-style: italic; color: #7f8c8d; margin-top: 5px; font-size: 0.9em; }