:root {
    --bg-nav: transparent;
    --bg-footer: #e1ebff;
}

*,
*::before,
*::after {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    appearance: none;
    list-style: none;
    text-decoration: none;
}


body {
    background-color: white;
    font-family: sans-serif;
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

a {
    color: inherit;
    text-decoration: none;
}

nav {
    background-color: var(--bg-nav);
    display: flex;
    width: 100%;
    height: 50px;
    align-items: center;
    justify-content: center;
}

main {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    width: 100%;
    flex-grow: 1;
}

footer {
    background-color: var(--bg-footer);
    width: 100%;
    height: 70px;
    transition: height 0.3s ease;
    -webkit-box-shadow: 0px -10px 20px -18px rgba(0,0,0,0.19);
    -moz-box-shadow: 0px -10px 20px -18px rgba(0,0,0,0.19);
    box-shadow: 0px -10px 20px -18px rgba(0,0,0,0.19);
}

@media screen and (min-width: 800px) {
    footer {
        height: 80px;
    }
}