:root{--header-height:calc(3.5rem + env(safe-area-inset-top));--footer-height:3rem;--mobile-bottom-nav-height:4rem;--sidebar-width:16rem;--sidebar-width-collapsed:3.5rem;--content-max-width:80rem;--container-padding:1.5rem;--z-base:0;--z-dropdown:30;--z-sticky:40;--z-overlay:50;--z-modal:60;--z-toast:70;--z-tooltip:80}@media (max-width:640px){:root{--header-height:calc(3.5rem + env(safe-area-inset-top));--container-padding:1rem}}