#hidden-forma { width:400px; padding:25px 50px; margin:auto;}

#hidden-forma input {font-size:14px; height:40px; border-radius:0; border:none; border-bottom:1px solid #000000; width:100%; padding:5px; margin:10px auto;}

#hidden-forma textarea {font-size:14px; height:100px; border-radius:0; border:none; border-bottom:1px solid #000000; width:100%; padding:5px; margin:10px auto;}
  
#hidden-forma .btn {font-size:24px;   border-radius:0; border:none; width:100%; padding:15px 0; margin:15px auto; background-color:#FFCC00; color:#000; text-align:center;  cursor:pointer;}
#hidden-forma .btn:hover {background-color:#FFDD00;}