body {
  font-family: Arial, Helvetica, Sans-serif;
    font-size: 14px;
    border-top: 50px solid #afafaf;
    margin: 0;
    padding: 0;
}
header, .contenedor {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    border-bottom: 1px solid #dddddd;
}

form {
  text-align: right;
}
.cont-campos {
  margin-bottom: 10px;
  box-sizing: border-box;
}
input[type="text"], select, input[type="num"], input[type="mail"] {
  height: 30px;
  width: 50%;
  box-sizing: border-box;
  margin-left: 20px;
}
.cont-radio {
  margin-left: 20px;
  margin-bottom: 10px;
  display: inline-block;
  width: 50%;
  text-align: left;
}
.opciones {
  width: 50%;
  text-align: left;
  margin-left: auto;
}
.opciones input {
  width: 71%;
}
.opciones select {
  width: 10%;
  margin-left: 5px;
}
.opciones select:first-child {
  margin-left: 0;
}

.button{
 text-decoration:none; 
 text-align:center; 
 padding:11px 32px; 
 border:solid 1px #004F72; 
 -webkit-border-radius:4px;
 -moz-border-radius:4px; 
 border-radius: 4px; 
 font:18px Arial, Helvetica, sans-serif; 
 font-weight:bold; 
 color:#E5FFFF; 
 background-color:#3BA4C7; 
 background-image: -moz-linear-gradient(top, #3BA4C7 0%, #1982A5 100%); 
 background-image: -webkit-linear-gradient(top, #3BA4C7 0%, #1982A5 100%); 
 background-image: -o-linear-gradient(top, #3BA4C7 0%, #1982A5 100%); 
 background-image: -ms-linear-gradient(top, #3BA4C7 0% ,#1982A5 100%); 
 filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1982A5', endColorstr='#1982A5',GradientType=0 ); 
 background-image: linear-gradient(top, #3BA4C7 0% ,#1982A5 100%);   
 -webkit-box-shadow:0px 0px 2px #bababa, inset 0px 0px 1px #ffffff; 
 -moz-box-shadow: 0px 0px 2px #bababa,  inset 0px 0px 1px #ffffff;  
 box-shadow:0px 0px 2px #bababa, inset 0px 0px 1px #ffffff;  
  
  }
  
.btn {
  background: #3498db;
  background-image: -webkit-linear-gradient(top, #3498db, #2980b9);
  background-image: -moz-linear-gradient(top, #3498db, #2980b9);
  background-image: -ms-linear-gradient(top, #3498db, #2980b9);
  background-image: -o-linear-gradient(top, #3498db, #2980b9);
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
  -webkit-border-radius: 9;
  -moz-border-radius: 9;
  border-radius: 9px;
  font-family: Georgia;
  color: #ffffff;
  font-size: 20px;
   padding: 4px 28px 6px 28px;
  text-decoration: none;
}

.btn:hover {
  background: #3cb0fd;
  background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}

@media screen and (max-width:800px) {
  input[type="text"], select, input[type="num"], input[type="mail"] {
    width: 100%;
    display: block;
    margin: 0;
  }
  .opciones {
    width: 100%;
  }
  .opciones input {
    width: 78%;
    display: inline-block;
  }
  .opciones select {
    display: inline-block;
    margin: 0;
  }
  .cont-campos label {
    display: block;
    text-align: left;
  }
  .cont-radio {
    margin-left: 0;
    display: block;
    width: 100%;
  }
  .cont-radio label {
    display: inline-block;
    width: 49%;
  }
}