*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

img{
    width: 100%;
}

header{
    width: 100%;
    height: 5vh;
    background-image: linear-gradient(#00a2ff, #54c1ff);
    color: white;
    text-align: center;
    font-size: 2.4vh;
}

header p{
    display: block;
    text-align: center;
}

article{
    display: flex;
}

nav{
    width: 30%;
}

nav ul li {
    margin: 15px;
    list-style-type: none;
    text-align: center;
}

article section{
    width: 60%;
    max-width: 60%;
    float: left;
    margin: auto;
    vertical-align: text-bottom;
}

article section div{
    display: flex;
    flex-flow: wrap column;
    float: left;
}

article section img{
    float: left;
    width: 50%;
    display: block;
    padding: 5px;
}

article section p{
    vertical-align: text-bottom;
}

footer{
    width: 100%;
    text-align: center;
}

.kasprzyk{
    width: 100%;
}

.cebulski{
    width: 100%;
}

.podstronaArticle section{
    width: 50%;
    text-align: justify;
    margin: auto;
    padding: 5px;
}

@media only screen and (max-width: 700px){
    *{
        width: 100%;
        text-align: center;
    }
    header, article, nav, section, footer{
        width: 100%;
        text-align: center;
        display: flex;
        flex-flow: row wrap;
        margin: auto;
    }

}