main.css

body {
    background:
        linear-gradient(160deg, #138fa5 25%, transparent 25%) -50px 0,
        linear-gradient(200deg, #15609e 25%, transparent 25%) -50px 0,
        linear-gradient(340deg, #138fa5 25%, transparent 25%),
        linear-gradient(20deg, #15609e 25%, transparent 25%);
    background-size: 80px 80px;
    background-color: #085a90;
    background-attachment: fixed;
    
}

.centerdiv {
    margin: auto;
    background-color: aliceblue;
    width: 80%;
    padding-bottom: 99%;
    border-radius: 0.5rem;
    box-sizing: border-box;
    align-items: center;
    background: linear-gradient(10deg, rgb(169, 222, 233) 0%, rgb(205, 252, 247) 86%);
}
.indiv {
    padding-left: 10%;
    padding-top: 5%;
    padding-right: 10%;
    color: #110604;
    float: none;
    font-family: sans-serif;
    align-items: center;
    font-size: 20px;

}
.screenshot {
    max-width: 50%;
    max-height: 50vh;
    margin: auto;
    margin-bottom: 5%;
    margin-top: 5%
}
.descimg {
    position: absolute;
    bottom: 8px;
    left: 16px;
    max-width: 100%;
    max-height: 100vh;
    margin: auto;

}
.photo {
    max-width: 80%;
    max-height: 80%;
    margin-bottom: 50%;
    align-items: center;
    margin:auto;
    position: relative;
    text-align: center;
    display: grid;
}
.photodiv{
    box-shadow: #085a90;
    margin-bottom: 5%;
}
.posts_options{
    font-family: sans-serif;
    padding-left:5%;
}
.navbuttons {
    text-align: center;
    margin-bottom: 3%;
}