.search-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
  opacity: 1;
  background-color: rgba(0, 0, 0, 1);
  transition-property: background-color;
  transition-timing-function: cubic-bezier(0.25, 0, 0, 1.0);
  transition-duration: 0.92s;
}

.search-bar.hidden {
  opacity: 0;
  background-color: rgba(0, 0, 0, 0);
  transition-property: none;
}

smart-button.search-mic-button {
  opacity: 1;
  background-color: #5d6368;
  position: absolute;
  left: 28.6rem;
  top: 4rem;
}

.search-bar.hidden .search-input {
  left: 6rem;
  right: auto;
  top: 4rem;
  width: 8rem;
  border-radius: 4rem;
  padding-left: 0;
  transition-property: none;
}

.search-input span {
  opacity: 0;
}

.search-bar.opened .search-input span {
  opacity: 1;
  transition-property: opacity;
  transition-timing-function: cubic-bezier(0.25, 0, 0, 1.0);
  transition-duration: 0.92s;
}

/* icon parts */
.search-bar.hidden [data-icon].search-input:before {
  left: 1.3rem;
  right: auto;
}

[data-icon].search-input:before {
  width: 5.4rem;
  right: 1.2rem;
  font-size: 5.4rem;
  line-height: 8rem;
  text-align: center;
  color: #2d2d2d;
  white-space: normal;
  top: 0;
  position: absolute;
}

.search-input {
  /* 38.4rem = 28.6rem (left) + 8rem (voice button) + 1.8rem (margin) */
  left: 38.4rem;
  /* 77rem = left: 38.4rem + right 38.6rem */
  width: calc(100% - 77rem);
  top: 4rem;
  height: 8rem;
  position: absolute;

  display: inline-block;
  background-color: #ffffff;

  color: #808080;

  font-size: 3.2rem;
  line-height: 8rem;

  overflow: hidden;
  padding-left: 4rem;
  border-radius: 4rem;

  transition-property: all;
  transition-timing-function: cubic-bezier(0.25, 0, 0, 1.0);
  transition-duration: 0.92s;
}

/* blue underline */
.search-input:after {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  content: ' ';
  border-bottom: 0.6rem #61acd7 solid;
  box-sizing: border-box;
  transition-property: all;
  transition-timing-function: cubic-bezier(0.25, 0, 0, 1.0);
  transition-duration: 0.92s;
}

.search-bar.hidden .search-input:after {
  opacity: 0;
  transition-property: none;
}

.search-bar.opened .search-mic-button {
  transition-property: opacity;
  transition-timing-function: cubic-bezier(0.25, 0, 0, 1.0);
  transition-duration: 0.66s;
  opacity: 1;
}

.search-bar .search-mic-button {
  transition-property: none;
  opacity: 0;
}