.af-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: #e5e5e5;
  z-index: 1000;
}

.af-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: #000;
  transition: width .3s ease;
}

.af-form {
  position: relative;
  overflow: hidden;
}

.af-field {
  min-height: 100vh;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 48px 24px;
}

.af-field.is-active {
  display: flex;
}

.af-navigation {
  position: fixed;
  bottom: 24px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 24px;
}

.af-navigation button {
  padding: 12px 20px;
}

.af-navigation button {
  opacity: .4;
  pointer-events: none;
  transition: opacity .2s ease;
}

.af-navigation button.is-enabled {
  opacity: 1;
  pointer-events: auto;
}

.af-navigation button.is-hidden {
  display: none;
}