body {
  padding-top: 100px;
  padding-bottom: 50px;
  background: url(../../../images/fondo.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  background-size: cover;
}

.form-signin {
  max-width: 330px;
  padding: 15px;
  margin: 0 auto;
  /*- Sombra en el form se quito para que no tener sombra*/ 
  /*box-shadow: 2px 2px 1px #aaa; */
  background-color: rgba(255,255,255,0.6);/*- Transparencia en el form*/
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
  margin-bottom: 10px;
}
.form-signin .checkbox {
  font-weight: normal;
}
.form-signin .form-control {
  position: relative;
  height: auto;
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
  padding: 10px;
  font-size: 16px;
}
.form-signin .form-control:focus {
  z-index: 2;
}
.form-signin input[type="email"] {
  margin-bottom: -1px;
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
  margin-bottom: 10px;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}