.bslib-sidebar-layout>.sidebar>.sidebar-content { display: flex; flex-direction: column; padding: 1.5rem; } .bslib-sidebar-layout>.main { grid-column: 2 / 3; border-top-left-radius: 0; border-bottom-left-radius: 0; padding: 1.5rem; } .shiny-notification { top: 0px; margin-left: auto; margin-right: auto; width: 200px; background-color: rgba(182, 186, 191, .9); }