.contenidor{
    text-align: center;
    font-weight: bold;
    /*font-size: 3vw; */
    font-size: 3rem;
    color: whitesmoke;
height: 600px;
width: 600px;
margin: auto;
margin-top: 150px;
/*margin-left:450px;
margin-right: 450px;*/
background:gray ;


}

.logo{
 /*background: yellowgreen; */
margin: auto;
/*margin-right: auto;
margin-top: 20px;*/

height: 310px;
width: 480px;   
}

.titol{
    font-weight: bold;
 margin-left: auto;
margin-right: auto;
margin-top: 10px;
margin-bottom: 10px;
/*background: gainsboro;*/
height: 80px;
width: 230px; 
 }
 
.login{
    
 margin-left: auto;
margin-right: auto;
margin-top: 10px;

height: 600px;
width: 330px; 
 }

.boto1{
    margin-left: auto;
margin-right: auto;
margin-top: 30px;
 height: 60px;
   width: 230px;
}

.boto2{
 font-weight: bold;
 font-size: 40px;
 color: #444;
     /*color: whitesmoke;*/
 background:white ;
  height: 60px;
   width: 180px;
 }

 .usu-css {
 display: block;
 font-size: 40px;
 font-family: 'Arial', sans-serif;
 font-weight: 200;
 color: #444;
 line-height: 1.3;
 padding: .4em 1.4em .3em .8em;
 width:400px;
 max-width: 150%; 
 box-sizing: border-box;
 margin: 0;
 border: 1px solid #aaa;
 box-shadow: 0 1px 0 1px rgba(0,0,0,.03);
 border-radius: .3em;
 -moz-appearance: none;
 -webkit-appearance: none;
 appearance: none;
 background-color: #fff;
 
 background-repeat: no-repeat, repeat;
 background-position: right .7em top 50%, 0 0;
 background-size: .65em auto, 100%;
}
.usu-css::-ms-expand {
 display: none;
}
.usu-css:hover {
 border-color: #888;
}
.usu-css:focus {
 border-color: #aaa;
 box-shadow: 0 0 1px 3px rgba(59, 153, 252, .7);
 box-shadow: 0 0 0 3px -moz-mac-focusring;
 color: #222; 
 outline: none;
}
.usu-css option {
 font-weight:normal;
}