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

body {
    margin: auto;
    max-width: 800px;
    line-height: 2;
    background-color: lightgray;
    font-family: sans-serif;
}

img {
    max-width: 100%;
    border-radius: 25px;
}

a {
    text-decoration: none;
    color: blue
}
hr {
    border: solid 3px black;
}



.container {

    margin: 15px;
    background-color: white;
    border: solid  black;
    border-radius: 25px;
    box-shadow: 5px 5px 5px gray;
    padding: 15px;
}
header {
    text-align: center;
}
footer {
    text-align: center;
}

@media screen and (max-width: 700px) {

    

}