body {
    margin: 0;
    padding: 20px 0;
    background-color: #EDF3F7;
    background-image: url('images/bg.jpg');
    font-size: 15px;
    font-family: sans-serif, Arial;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    box-sizing: border-box;
}

header,
main,
footer {
    width: 100%;
    padding: 0 20px;
    max-width: 970px;
    margin: 0 auto;
    box-sizing: border-box;
}

header {
    margin-bottom: 20px;
}

h1,
h2 {
    font-weight: 500;
}

ul {
    padding-left: 0;
    list-style-position: inside;
}

li {
    margin-bottom: 5px;
}

a {
    text-decoration: none;
    color: #2979FF;
}

footer {
    margin-top: auto;
    padding-top: 40px;
}