.btn {
  display: inline-block;
  padding: 6px 12px;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: normal;
  line-height: 1.42857143;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  background-image: #fff;
  border: 1px solid white;
  border-radius: 4px;
  background-color: white;
  opacity: 1;
}

fullscreen::backdrop{
  background: white;
}

div:-moz-full-screen {
  background-color: white;
}

div:-webkit-full-screen {
  background-color: white;
}

div:fullscreen {
  background-color: white;
}

#fullscreen:fullscreen {
  background-color: white;
}

.full-screen-button {
  background-color: white;
  color: black;
}

.full-screen-button:hover {
  background-color: white;
  color: black;
}

.fullscreen {
  background-color: white;
  color: black;
}
.figure:fullscreen {
  background-color: white;
  color: black;
}
.btn-primary {
  color: #fff;
  background-color: #6495ED;
  border-color: #6495ED;
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary.active,
.ope.dropdown-toggle.btn-primary {
  color: #fff;
  background-color: #6495ED;
  border-color: #6495ED;
}
.btn-primary:active,
.btn-primary.active,
.open .dropdown-toggle.btn-primary {
  background-image: #fff;
}
.btn-primary.badge {
  color: #6495ED;
  background-color: #fff;
}
.btn-block {
  display: block;
  width: 100%;
  padding-right: 0;
  padding-left: 0;
}
.btn-block + .btn-block {
  margin-top: 5px;
}
input[type="submit"].btn-block,  
input[type="reset"].btn-block,  
input[type="button"].btn-block {  
  width: 100%;
}