html,body{
  width: 100%;
  height: 100vh;
  padding: 0;
  margin: 0;
}

.box {
  width: 300px;
  height: 200px;
  position: absolute;
  margin: auto;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.logobox{
  width: 300px;
}

.texta{
  text-align: center;
  font-family: Arial, sans-serif;
}


.imgres{
  width: 100%;
  height: auto;
}