*{margin: 0; padding: 0;}

body{background-image: url("fondo.jpg"); font-size: 20px; font-family: Bradley Hand ITC; text-align: center;margin-top:35px;}

#contenedor{ margin: 0 auto; width: 960 px;}

h1{text-decoration: underline ;
background : #DF0101 ;
width:250px;
margin:0 auto ;}

.calculadora{width: 400px; margin: 0 auto; padding: 20px; margin-top: 40px; border: 1px solid #848484; border-radius:20px; background:#9A2EFE ;}
.calculadora fieldset{border:none; font-size: 18px; padding:10px;}
input[type="text"]{width:300px; margin-left:60px; padding:10px; background:#848484; border: 1px solid #8000FF ; border-radius:10px;}
input[type="button"]{width:90px;margin-top:10px;padding:10px; border-radius:10px; font-family:Comic Sans MS;}
input[type="button"]:hover{border:1px solid #2E64FE; color:#F2F2F2;}
footer{margin-top:35px; font-family:Arial; color:#FFFF00; font-size:15px;}