html, body{
    height: 100%;
}

body{
    margin: 0;
    background-image: url(de2023-back.jpg);
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
}

* {
    box-sizing: border-box;
}

.jumbo{
    background-color: rgba(255,255,255,0.7);
    height: 100%;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Fredoka One', sans-serif;
}


.jumbo .large{
    font-size: 25vh;
    text-align: center;
    margin:0;
}

.jumbo .small{
    font-size: 8vh;
    text-align: center;
    margin: 0;
}

@media screen and (max-width: 1200px) {
.jumbo .large {
        font-size: 20vh;
    }

    .jumbo .small {
        font-size: 7vh;
    }
}

@media screen and (max-width: 600px) {
    .jumbo{
        height: auto;
    }

    .jumbo .large {
        font-size: 60px;
    }

    .jumbo .small {
        font-size: 20px;
    }

    body{
        background-position: center;
    }
}


nav{
    height:8vh;
    min-height: 30px;
    background-color: rgba(2, 131, 66);
    color: white;
    font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    width:100%;
    text-align: right;
    position: fixed;
}

nav ul{
    margin: 0;
    padding: 0;
    list-style-type: none;
}

nav ul li{
    display: inline-block;
    min-width: 80px;
    width: 12.5%;
    margin:0;
    padding: 0;
    text-align: center;
    height: 8vh;
    min-height: 30px;
    vertical-align: middle;
}

nav ul li a{
    display: inline-block;
    font-size: 3vh;
    line-height: 8vh;
    vertical-align: middle;
    color: white;
    font-weight: bold;
    height:100%;
    text-decoration: none;
    width: 100%;
    transition: 0.7s;
}



nav ul li a:hover {
    background-color: rgba(255,255,255,0.3);
}

#co{
    background-color: rgba(255, 230, 212, 0.85);
    padding: 20px;
}

#kde {
    background-color: rgba(212, 229, 239, 0.6);
    font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 8vh 0 0 0;
}

#kde h2{
    margin-top: 20px;
}

#kedy{
    background-color: rgba(220,230,212,0.85);
    padding:20px;
    font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#kedy h3, #ako h3{
    margin-top:40px;
    margin-bottom: 0;
}

#kedy h3+p, #ako h3+p{
    margin-top:0;
}

#ako{
    padding: 20px;
    background-color: rgba(255,255,255,0.85);
}

#ako a{
    display: block;
    border:3px solid crimson;
    background-color: coral;
    text-decoration: none;
    color: white;
    width:100%;
    max-width:300px;
    height:55px;
    line-height: 55px;
    text-align: center;
    font-size: 1.2em;
    transition: 0.3s;
}

#ako a:hover{
    background-color: crimson;
    border: 3px solid coral;
}

section {
    font-family: 'Open Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

section h1{
    font-size: 2em;
}

@media screen and (max-width: 600px) {
    nav ul li {
        min-width: none;
        width: 23%;
    }

    nav {
        text-align: center;
    }

    nav ul li a {
        font-size: 18px;
    }

    #cover {
        height: 100%;
    }

    #kde iframe {
        width: 95%;
        height: 400px;
        margin-bottom: 40px;
    }

    #ako a{
        width:100%;
        max-width: none;
    }

}