.grid {
    display: grid;
    grid-template-columns: repeat(10, 0.5fr);
    grid-template-rows: repeat(8, 0.5fr);
    grid-column-gap: 16px;
    grid-row-gap: 32px;
}

.card1 { grid-area: 1 / 1 / 3 / 5; }
.card2 { grid-area: 2 / 7 / 4 / 11; }
.card3 { grid-area: 3 / 2 / 5 / 6; }
.card4 { grid-area: 5 / 1 / 7 / 5; }
.card5 { grid-area: 5 / 7 / 7 / 11; }
.card6 { grid-area: 7 / 4 / 9 / 8; }

.visually-hidden {
    visibility: hidden;
}
.header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}
.header a {
    font-size: 3rem;
    margin: 0;
    font-weight: bold;
    text-decoration: none;
    color: oklch(0.1484 0 176);
}
.header nav ul{
    display: flex;
    flex-direction: row;
    list-style: none;
}
.header nav a {
    padding: 1rem;
    text-decoration: none;
    color: oklch(0.2103 0 335);
    font-size: 1rem;
}
img {
    transition: opacity 0.3s ease;
    max-width: 46rem;
    position: relative;
    z-index: 2;
}
.hidden{
    position: relative;
}
.text{
    position: absolute;
    top: 0.5rem;
    left: 1rem;
    z-index: 1;
}
img:hover {
    opacity: 0;
}

.grid{
    position: relative;
    z-index: 1;
}
footer{
    position: relative;
    z-index: 1;
}
/*background animation */
@keyframes animate {
    0%{
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }
    100%{
        transform: translateY(-1000px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }
}

.background {
    position: fixed;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    margin: 0;
    padding: 0;
    background: #bebfcb;
    overflow: hidden;
}
.background li {
    position: absolute;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    animation: animate 19s linear infinite;
}




.background li:nth-child(0) {
    left: 31%;
    width: 174px;
    height: 174px;
    bottom: -174px;
    animation-delay: 1s;
}
.background li:nth-child(1) {
    left: 38%;
    width: 159px;
    height: 159px;
    bottom: -159px;
    animation-delay: 2s;
}
.background li:nth-child(2) {
    left: 75%;
    width: 102px;
    height: 102px;
    bottom: -102px;
    animation-delay: 6s;
}
.background li:nth-child(3) {
    left: 7%;
    width: 144px;
    height: 144px;
    bottom: -144px;
    animation-delay: 10s;
}
.background li:nth-child(4) {
    left: 66%;
    width: 102px;
    height: 102px;
    bottom: -102px;
    animation-delay: 15s;
}
.background li:nth-child(5) {
    left: 63%;
    width: 193px;
    height: 193px;
    bottom: -193px;
    animation-delay: 16s;
}
.background li:nth-child(6) {
    left: 81%;
    width: 184px;
    height: 184px;
    bottom: -184px;
    animation-delay: 17s;
}
.background li:nth-child(7) {
    left: 45%;
    width: 111px;
    height: 111px;
    bottom: -111px;
    animation-delay: 17s;
}
/* title animatie */
.title{
    animation-duration: 3s;
    animation-name: slide-in;
}
@keyframes slide-in {
    from {
        translate: -50vw 0;
        scale: 200% 1;
    }

    to {
        translate: 0 0;
        scale: 100% 1;
    }
}