* {
    box-sizing: border-box;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;

}

html, body {
    margin: 0;
    padding: 0;
    font-family: Roboto;
    width: 100%;
    height: 100%;
}

::-webkit-scrollbar { width: 40px; }
::-webkit-scrollbar-track { border-radius: 5px; }
::-webkit-scrollbar-thumb {
    background: red; 
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover { background: #b30000; }

i, span { pointer-events: none; }

button { cursor: pointer; outline: none; }