html, body {
    width: 100%;
    height: 100%;
    margin: 0%;
    overflow: hidden;
    font-family: Arial, Helvetica, sans-serif;
}
#spinningPicture {
    position: absolute;
    width: 8vw;
    top: 440px;
    left: 130px;
  }
.grid-container {
    display: grid;
    grid-template-columns: 10vw 10vw 10vw 20vw 50vw;
    grid-template-rows: 20vh 60vh 20vh;
}

.grid-item {
    background-color: white;
    text-align: center;
    padding: 20px;
    font-size: 30px;
}

.item1, .item3, .item4 {
    text-align: left;
    grid-column: 1 / span 4;
}

.item2 {
    grid-column: 5;
    grid-row: 1 / span 3;
    background-color: #c52146;
}

.item1 {
    grid-row: 1;
}

.item3 {
    grid-row: 2;
    margin-left: 12%;
    margin-right: 5vw;
}

.item4 {
    grid-row: 3;
}

#foto-iphone {
    width: 50%;
    height: auto;
}

#logo {
    width: 3vw;
    height: auto;
}

#knop {
    width: 8vw;
    position: absolute;
    top: 440px;
    left: 130px;
}
#knop2 {
    width: 8vw;
    position: absolute;
    top: 440px;
    left: 300px;
}
#knop2:hover{
    left: 800px;
    top: 700x;
}

h1 {
    font-size: 2.5vw;
}

#p1 {
    font-size: 1.5vw;
}

#p2 {
    font-size: 1vw;
    color: grey;
}
#overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
}
#popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}
#videoroll {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
}
.textkleur{
    animation: textkleur 0.7s infinite;
}
#movingPicture {
    position: absolute;
  }

.textsize{
    animation: textsize 0.3s infinite;
}
#logo {
    position: absolute;
    top: 0;
    left: 0;
    animation: circle 0.5s infinite linear;

 }

 @keyframes circle {

     0% {
      transform: rotate(0deg) translate(100px) rotate(0deg);
    } 
    25% {
      transform: rotate(90deg) translate(100px) rotate(-90deg);
    }
    50% {
      transform: rotate(180deg) translate(100px) rotate(-180deg);
    }
    75% {
      transform: rotate(270deg) translate(100px) rotate(-270deg);
    }
     100% {
      transform: rotate(360deg) translate(100px) rotate(-360deg);
    } 
 }
@keyframes textkleur{
    0% {color: whitesmoke;}
    25% {color: white;}
    50% {color: yellow;}
    75% {color: gray;}
    100% {color: pink;}
}
@keyframes textsize{
    0% {font-size: smaller;}
    25% {font-size: medium;}
    50% {font-size: large;}
    75% {font-size: medium;}
    100% {font-size: small;}
}
@media only screen and (max-width: 430px) {
    .grid-container {
        grid-template-columns: 10vw 80vw 10vw;
        grid-template-rows: 5vh 95vh 30vh 40vh 30vh;
    }

    #logo {
        width: 10vw;
    }
    #knop{
        width: 30vw;
    }
    .item2{
        grid-row: 3 / span 5;
        grid-column: 1 / span 3;
    }
    .item4{
        display: none;
    }
    h1 {
        font-size: 3rem; 
    }
    #p1{
        font-size: 1.6rem;
    }
    #p2{
        font-size: 1rem;
    }
    #foto-iphone{
        grid-column: 2;
        margin-top: 50%;
        width: 70%;
    }
}

@media only screen and (min-width: 431px) and (max-width: 1200px) {
    .grid-container {
        grid-template-columns: 10vw 80vw 10vw;
        grid-template-rows: 5vh 95vh 100vh;
    }

    #logo {
        width: 10vw;
    }
    #knop{
        width: 30vw;
    }
    .item2{
        grid-row: 3 / span 5;
        grid-column: 1 / span 3;
    }
    .item4{
        display: none;
    }
    h1 {
        font-size: 3rem; 
    }
    #p1{
        font-size: 1.6rem;
    }
    #p2{
        font-size: 1rem;
    }
    #foto-iphone{
        grid-column: 2;
        margin-top: 20%;
        width: 50%;
    }
}