body {  

background-size: cover;
background-position-x:center;
background-repeat:no-repeat;  
  z-index: 0;
  opacity:0.9;
}


.giris {min-height:60%;display:table;height:50%;width:100%;height: 80%;  height: calc(100% - 259px);top:20px;}

.usttenbosluk{
    margin-top:100px;
}


@media only screen and (min-width: 300px)and (min-width: 599px) {
    /* For tablets: */
   .usttenbosluk{
    margin-top:130px;
}
}
@media only screen and (min-width: 600px) {
    /* For tablets: */
 .usttenbosluk{
    margin-top:130px;
}
}
@media only screen and (min-width: 601px) and (min-width: 768px) {
    /* For desktop: */
.usttenbosluk{
    margin-top:100px;
}
}
@media only screen and (min-width: 769) and (min-width: 900px)  {
    /* For desktop: */
   .usttenbosluk{
    margin-top:100px;
}
}
@media only screen and (min-width: 901) and (min-width: 1200px)  {
    /* For desktop: */
   .usttenbosluk{
    margin-top:100px;
}
}

.form-control {border-radius:10px;height:42px;}

.form-group { margin-bottom: 15px;}