styl_1.css

body {
    margin: 0;
}

* {
    font-family: Cambria;
}

header,
footer {
    background-color: #829EB9;
    color: white;
    text-align: center;
    padding: 10px;
}

main {
    display: flex;
}

#panelLewy,
#panelPrawy {
    background-color: #B3C6D9;
    height: 400px;
    width: 25%;
    padding-top: 100px;
}

#panelSrodkowy {
    background-color: #E0E9F1;
    height: 400px;
    width: 50%;
    text-align: center;
    padding-top: 100px;
}

table {
    border: 1px solid DimGray;
    width: 80%;
    margin-left: auto;
    margin-right: auto;
    border-collapse: collapse;
}

td,
th {
    border: 1px solid DimGray;
    border-collapse: collapse;
}

td:hover {
    background-color: SteelBlue;
    color: white
}

img {
    width: 100%;
    border-radius: 20px;
}