style.lib.css

/* text */
.bold {
  /* font-weight: 700; */
  font-weight: bold;
}
.tac {
  text-align: center;
}
.vam {
  vertical-align: middle;
}
/* position */
.posa {
  position: absolute;
}
.posr {
  position: relative;
}
/* layout */
.dib {
  display: inline-block;
}
.df {
  display: flex;
}
.dg {
  display: grid;
}
.dn {
  display: none;
}
.vh {
  visibility: hidden;
}
/* dimension */
.mauto {
  margin-right: auto;
  margin-left: auto;
}
/* ui */
.pointer {
  cursor: pointer;
}
.usn {
  user-select: none;
}
.bzb {
  box-sizing: border-box;
}