:root {
    box-sizing: border-box;
    --colour-dark: #030912;
    --colour-light: #c9f1fc;
    --colour-white: #cdcdcd;
    --colour-main: #4ad8ff;
    font-size: 24px;

    @import url('https://fonts.googleapis.com/css2?family=Rubik:ital,wght@0,300..900;1,300..900&display=swap');

}

h1,
p,
a {
    font-family: "Rubik", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;

    line-height: 1.2em;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
}

p,
a {
    font-size: 1.2rem;
    color: var(--colour-white);
    margin: 0.4em;
}

#copyright {
    font-size: 0.8rem;
}

a {
    display: block;
    background-color: var(--colour-main);
    color: var(--colour-dark);
    text-decoration: none;
    padding: 0.8rem;
    border-radius: 0.6em;
    font-weight: 600;
}

a:hover {
    background-color: var(--colour-light);
    color: var(--colour-main);
}

body {
    background-color: var(--colour-dark);
    color: var(--colour-light);
    display: flex;
    flex-flow: column nowrap;
    justify-content: space-between;
    align-items: stretch;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

header #logo img {
    width: 180px;
    height: auto;
}

header,
main {
    padding: 1rem;
}

main {
    text-align: center;
    display: flex;
    flex-flow: column nowrap;
    justify-content: center;
    align-items: center;
}

footer {
    display: flex;
    flex-flow: row nowrap;
    justify-content: center;
    padding: 0.4rem;
}