body{
  background-image: url(algo-jpg);
  background-size: 100vw 100vh;
  background-attachment: fixed;
  margin: 0;
  }

form{
  width: 750px;
  margin: auto;
  background: rgba(0,0,0,0.4);
  padding: 10px 20px;
  box-sizing: border-box;
  margin-top: 20px;
  border-radius: 7px;
  }
  
h2{
  color: #fff;
  text-align: center;
  margin: 0;
  font-size: 30px;
  margin-bottom: 20px;  
}

h5{
  color: #fff;
  text-align: center;
  margin: 0;
  font-size: 18px;
  margin-bottom: 20px;  
}

input, textarea{
  width: 100%;
  margin-bottom: 20px;
  padding: 7px;
  box-sizing: border-box;
  font-size: 17px;
}

textarea{
  min-height: 100px;
  max-height: 200px;
  max-width: 100%;
}

#boton{
  background: #31384A;
  color: #fff;
  padding: 20px  
}

#boton:hover{
  cursor:pointer;	
}

@media (max-width:950px){
  form{
	width: 100%;
	}
}