utilities

/* Sane box model */
html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}


/* Clearfix */
.clearfix:before,
.clearfix:after {
  content: " ";
  display: table;
}

.clearfix:after {
  clear: both;
}


/* Positioning */
.center-xy {
  margin: 0 auto;
  display: table;
  position: relative;
  top: 50%;
  -webkit-transform: translateY(-50%);
  transform: translateY(50%);
}


/* Visibility */
.show {
  display: block;
}

.hide {
  display: none;
}

.invisible {
  visibility: hidden;
}

.hidden-accessible {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}


/* Disabled elements */
.disabled,
[disabled=true],
:disabled {
  cursor: default;
  opacity: 0.6;
  pointer-events: none;
  -moz-user-input: disabled;
  user-input: disabled;
  -moz-user-focus: ignore;
  user-focus: ignore;
}


/* Image replacement */
.hide-text {
  text-indent: 100%;
  white-space: nowrap;
  overflow: hidden;
}

/* Transitions */
.transition {
  -webkit-transition: all 0.3s ease-out;
  transition: all 0.3s ease-out;
}

.fade {
  opacity: 0;
  -webkit-transition: opacity 0.15s linear;
  transition: opacity 0.15s linear;
}

.fade.in {
  opacity: 1;
}