header {
    position: sticky;
    top: 0;
    z-index: 10;

    background-color: var(--color-bg);

    max-width: 1300px;
    margin: 0 auto;
    padding-inline: 1rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;

    padding-block: 0.75rem;
}

nav > #nav-left > a {
    display: flex;
    justify-content: center;
    align-items: center;
}

nav > #nav-left > a > img {
    width: 95px;
}

nav > #nav-center {
    display: none;
}

nav > #nav-center > ul {
    list-style-type: none;

    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
}

nav > #nav-center > ul > li > a {
    font-size: 0.875rem;

    &:hover {
        color: color-mix(in oklab, var(--color-fg) 75%, transparent);
    }
}

nav > #nav-right {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

nav > #nav-right > button#sign-in {
    color: var(--color-fg);

    border: 1px solid color-mix(in oklab, var(--color-fg) 20%, transparent);
    padding: 0.25rem 0.75rem;
    border-radius: 0.9rem;

    font-size: 0.875rem;

    &:hover {
        background-color: var(--color-card-hex);
        border-color: color-mix(in oklab, var(--color-fg) 20%, transparent);
    }
}

nav > #nav-right > button#download {
    background-color: var(--color-fg);
    color: var(--color-bg);

    padding: 0.35rem 0.75rem;
    border-radius: 0.9rem;

    font-size: 0.875rem;

    display: none;

    &:hover {
        background-color: var(--color-fg-02);
    }
}

nav > #nav-right > button#menu {
    display: flex;
    justify-content: center;
    align-items: center;
}

@media (min-width: 420px) {
    nav > #nav-right > button#download {
        display: inline-block;
    }
}

@media (min-width: 900px) {
    nav > #nav-center {
        display: block;
    }

    nav > #nav-right > button#menu {
        display: none;
    }
}