.exam{max-width:800px;margin:0 auto;padding:2rem}.exam-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:2px solid #e0e0e0}.exam-header h2{margin:0;font-size:1.5rem}.exam-progress{color:#666;font-size:.9rem}.exam-time{color:#666;font-size:.9rem;font-weight:500}.loading{text-align:center;padding:3rem;color:#666}.question-container{margin:2rem 0}.question{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 4px #0000001a}.question h3{margin:0 0 1.5rem;font-size:1.2rem;line-height:1.6}.options{display:flex;flex-direction:column;gap:.75rem}.option{padding:1rem;border:2px solid #e0e0e0;border-radius:6px;background:#fff;cursor:pointer;transition:all .2s;text-align:left;font-size:1rem}.option:hover{border-color:#1976d2;background:#f5f5f5}.option.selected{border-color:#1976d2;background:#e3f2fd;color:#1976d2;font-weight:500}.short-answer{margin-top:1rem}.answer-input{width:100%;padding:.75rem;border:2px solid #e0e0e0;border-radius:6px;font-size:1rem;font-family:inherit}.answer-input:focus{outline:none;border-color:#1976d2}.exam-controls{display:flex;justify-content:space-between;margin-top:2rem;padding-top:1rem;border-top:2px solid #e0e0e0}.btn{padding:.75rem 1.5rem;border:none;border-radius:6px;font-size:1rem;cursor:pointer;transition:all .2s;font-weight:500}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:#1976d2;color:#fff}.btn-primary:hover:not(:disabled){background:#1565c0}.btn-secondary{background:#f5f5f5;color:#333}.btn-secondary:hover:not(:disabled){background:#e0e0e0}.exam-results{text-align:center;padding:3rem;background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a}.exam-results h2{margin:0 0 2rem;font-size:1.8rem}.score-display{margin:2rem 0}.score-value{font-size:4rem;font-weight:700;color:#1976d2;margin-bottom:.5rem}.score-label{font-size:1.2rem;color:#666}.time-spent{margin-top:1.5rem;font-size:1rem;color:#666}