html, body {
  width: 100%;
  height: 100%;
  margin: 0px;
  position: fixed;
  left: 0;
  top: 0;
}

img {
  user-drag: none;
  -webkit-user-drag: none;
}

.cm-w-f {
  width: 100%;
}
.cm-h-f {
  height: 100%;
}

.cm-pos-fix {
  position: fixed;
}
.cm-pos-abs {
  position: absolute;
}
.cm-pos-rel {
  position: relative;
}

.cm-pos-tl {
  top: 0;
  left: 0;
}
.cm-pos-tr {
  top: 0;
  right: 0;
}
.cm-pos-bl {
  bottom: 0;
  left: 0;
}
.cm-pos-br {
  bottom: 0;
  right: 0;
}

.cm-circle {
  border-radius: 50%;
}

.cm-click {
  cursor: pointer;
}
.cm-no-click {
  cursor: not-allowed;
}

.cm-display-no {
  display: none;
}
.cm-display-block {
  display: block;
}
.cm-display-flex {
  display: flex;
}
.cm-display-iblock {
  display: inline-block;
}
.cm-display-iflex {
  display: inline-flex;
}

.cm-no-select {
  user-select: none;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}