styles.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-transition: background-color 750ms ease-in-out, color 300ms ease-out;
  -ms-transition: background-color 750ms ease-in-out, color 300ms ease-out;
  transition: background-color 750ms ease-in-out, color 300ms ease-out;
}

#disconnect {
  font-family: sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Utility */

.noselect {
  -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Old versions of Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}