html{box-sizing:border-box;margin:0;font-family:Verdana,Geneva,Tahoma,sans-serif}body{background-color:#1a1a1a;color:gray;text-align:center}.answer-container p{max-width:4rem;margin:0 auto;font-size:1.25rem;border:1px solid transparent;border-radius:.25rem;background-color:#fff;color:#000}.answer-text-container{margin-top:.5rem;margin-left:.5rem;background-color:#fff;padding:1rem;text-align:center;font-size:2rem;min-width:4rem;min-height:2rem;border:1px solid transparent;border-radius:.25rem}.btn-check{margin-bottom:.5rem;padding:.5rem;height:3rem;width:13rem;font-size:1rem;color:#fff;border-radius:.25rem;border:2px solid transparent;background-color:#0af;box-shadow:1px 1px 25px 5px #0af}.btn-check:active{transform:translateY(4px);box-shadow:0 0 10px 2px #0af}.btn-check:hover{cursor:pointer;background-color:#00aaffbf;box-shadow:0 0 10px 2px #0af}.btn-is-correct{margin-bottom:.5rem;padding:.5rem;height:3rem;width:13rem;font-size:1rem;color:#000;border-radius:.25rem;border:1px solid transparent;background-color:#5f0;box-shadow:0 0 10px 2px #5f0}.btn-is-wrong{margin-bottom:.5rem;padding:.5rem;height:3rem;width:13rem;font-size:1rem;color:#fff;border-radius:.25rem;border:1px solid transparent;background-color:red;box-shadow:0 0 10px 2px red}.btn-start{padding:.5rem;height:3rem;width:8rem;font-size:1rem;color:#000;border-radius:.25rem;border:1px solid transparent;background-color:#ff0;box-shadow:1px 1px 25px 5px #ff0}.btn-start:active{transform:translateY(4px);box-shadow:0 0 10px 2px #ff0}.btn-start:hover{cursor:pointer;background-color:#ffff0080;box-shadow:0 0 10px 2px #ff0}.container{display:flex;flex-direction:column;padding:1rem;margin:0 auto;align-items:center;background-color:#8080801a;max-width:400px}.guess-container input{padding:1rem;margin:.5rem 0;text-align:center;font-size:1.5rem;max-width:4rem;min-height:2rem;border:1px solid transparent;border-radius:.25rem}.guess-answer-container{display:flex;justify-content:center}.hidden{display:none}.problem-container{padding:1rem;font-size:2rem;border:1px solid transparent;border-radius:.25rem;background-color:gray;color:#000}.score-container{padding:1rem;border:1px solid transparent;border-radius:.25rem;background-color:gray;color:#000}.score-container p{font-size:2rem}.spacer{padding:.5rem}