* {
    box-sizing: border-box;
}

html,
body {
    font-family: sans-serif;
    margin: 0;
}

body {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 100vh;
}

body > * > h1:first-child {
    margin: 0;
}

header {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    align-items: center;
}

@media (max-width: 425px) {
    header {
        flex-direction: column;
    }
}

header > nav > ul {
    padding: 0;
    list-style-type: none;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
}

main {
    flex: 1;
}