conveyal/modeify

.Modal {
  position: fixed;
  opacity: 1;
  z-index: 1001;
  max-width: 500px;
  top: 30%;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  transform: translateX(-50%);
}


/**
 * So transitions actually work
 */

.Modal.hidden {
  display: block;
}


/**
 * Default show/hide effect
 */

.Modal[effect="toggle"].hidden {
  display: none;
}


/**
 * Slide in from the bottom
 */

.Modal[effect="slide-in-bottom"] {
  top: 30%;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(0);
  -moz-transform: translateX(-50%) translateY(0);
  transform: translateX(-50%) translateY(0);
  transition: all .4s cubic-bezier(0.560, 0.185, 0.315, 1.150);
}

.Modal[effect="slide-in-bottom"].hidden {
  -webkit-transform: translateX(-50%) translateY(30%);
  -moz-transform: translateX(-50%) translateY(30%);
  transform: translateX(-50%) translateY(30%);
  opacity: 0;
}


/**
 * Sticky-up
 */

.Modal[effect="sticky-up"] {
  top: 0;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(0);
  -moz-transform: translateX(-50%) translateY(0);
  transform: translateX(-50%) translateY(0);
  transition: all .4s ease-in-out;
}

.Modal[effect="sticky-up"].hidden {
  -webkit-transform: translateX(-50%) translateY(-100%);
  -moz-transform: translateX(-50%) translateY(-100%);
  transform: translateX(-50%) translateY(-100%);
}


/**
 * Fade in and scale up from the middle
 */

.Modal[effect="fade-and-scale"] {
  top: 30%;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(0) scale(1);
  -moz-transform: translateX(-50%) translateY(0) scale(1);
  transform: translateX(-50%) translateY(0) scale(1);
  transition: all .4s cubic-bezier(0.560, 0.185, 0.315, 1.150);
}

.Modal[effect="fade-and-scale"].hidden {
  -webkit-transform: translateX(-50%) translateY(0%) scale(0.5);
  -moz-transform: translateX(-50%) translateY(0%) scale(0.5);
  transform: translateX(-50%) translateY(0%) scale(0.5);
  opacity: 0;
}