Snow Monkey を雑に左メニュー固定レイアウトにする

.scss

@media (min-width: 1024px) {
    .l-header {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 300px;
    }
    
    .admin-bar .l-header {
        top: 32px;
    }

    .l-header .p-header-sub-nav .c-navbar {
        flex-direction: column;
    }

    .l-header .p-global-nav .c-navbar {
        flex-direction: column;
    }

    html {
        margin-left: 300px
    }

    [data-has-sidebar=false] .c-entry__content>.alignfull {
        margin-left: 0;
        margin-right: 0;
        margin-left: calc(50% - (100vw - 300px) / 2);
        margin-right: calc(50% - (100vw - 300px) / 2);
    }

    .p-footer-cta {
        left: 300px;
    }
}