$sm = 576px $md = 768px $lg = 992px $xl = 1200px main flex-direction column align-items center aside.author margin-bottom 1rem .p-note > :last-child margin-bottom 0 @media (min-width $md) flex-direction row-reverse align-items unset aside.author margin-bottom 0 ol.entries margin-right 2rem justify-content flex-start