* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body{
  color: #000;
  font-family: 'Open Sans', sans-serif !important;
  font-size: 16px;
  height: 100%;
}
#gui-body {
  display: flex;
  flex-direction: row;
  position: absolute;
  margin: 0;
  padding: 0;
  height: calc(100% - 55px);
  width: 100%;
}
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: 16px;
}