body { background: #636363; font-family: Helvetica, Arial, sans-serif; }

#main { max-width: 600px; margin: 50px auto; }

h1 { text-align: center; color: white; font-size: 40px; }

fieldset { border: none; }

#question { width: 94%; background: #ddd; border: none; height: 100px; padding: 3%; font-size: 24px; }

input[type="submit"] { width: 200px; background: black; color: white; height: 40px; border: none; font-size: 24px; margin: 20px auto; display: block; }

#answer { display: none; background: #ddd; color: #444; font-size: 30px; padding: 10px; text-align: center; }
#answer a { color: black; }

#problems { text-align: center; font-size: 24px; max-width: 400px; margin: 40px auto 0 auto; color: #ddd; }

#problems a { color: white; }