.footer{
background-color: #222222;
color: white;
position: relative;
}

.responsive {
  width: 100%;
  height: auto;
}
.minheight{
min-height: 250px;
}

.navstyle{
  border-radius: 0px;
}



.fixed-brand img {
  width: 12%;
  height: auto;
  box-shadow: 0 0 28px rgba(0,0,0.7);
border-radius: 10px;
border: 4px solid palegoldenrod;
position: absolute;
top: 1vw !important;
left: 0.5vw !important;
}
.navbar-brand > img {
  display: block;
  z-index: 1;
}

.header_img {
  position: relative;
      top: 0;
      left: 0;
}

.logo_img {
  position: absolute;
}

.about_us{
  font-size: 14px;
  margin-top: 2px ;
  margin-bottom: 3px;
}


#top_button {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 15px;
  border: none;
  outline: none;
  background-color: rgba(0, 119, 255, 0.733);
  color: white;
  cursor: pointer;
  padding: 14px;
}

#top_button:hover {
  background-color: #555;
}


.heading_res{
  text-align: center;
  padding: 5px;
  background-color: #d9edf7;
}

.first-letter{
  font-size: 22px;
  color: #337ab7;
  line-height: 10px;
}

@media screen and (max-width: 900px) {
.about_us{
  display: none;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100% !important;
}

.center_d{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100% !important;
}
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 40%;
  height: 40%;
}

.center_d{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 31%;
  height: 20%;
}

.img_logo {
  float: left;
  margin: 0 10px 10px 0;
  width: 160px;
  height: 180px;
}