body
{
	height: 100vh;
	width: 100%;
	background: linear-gradient(green);

}

.logo{

	width: 410px;  
  height:150px; 


}

<style>



* {box-sizing: border-box;}
body {font-family: Verdana, sans-serif;}
.mySlides {display: none;}
img {vertical-align: center;}

/* Slideshow container */
.slideshow-container {
  max-width: 400px;

  position: relative;

  margin: auto;
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 95%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active {
  background-color: #717171;
}

/* Fading animation */
.fade {
  animation-name: fade;
  animation-duration: 1.5s;
}

@keyframes fade {
  from {opacity: .4} 
  to {opacity: 1}
}

/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
  .text {font-size: 11px}
}



@media screen and (max-width: 768px) {
    h1{
        font-size:40pt;
    }
	h2{
        font-size:20pt;
    }
	h3{
        font-size:20pt;
    }
	.optin_form{font-size:15pt;}
}

@media screen and (max-width: 600px) {
.outsidebox{width: 100%;

}
.insidebox{width: 95%;

}

</style>