* { margin: 0; padding: 0;}
html { height: 100%; font-size: 10px; }
body { height: 100%; font-size: 1.6rem; display: flex; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }

@media (min-width: 960px) {
    sidebar-left { width: 250px; }
    #painterro { position: relative; width: calc(100% - 250px); }
}