html {
  font-size: 10px;
  /* We have Fira Sans as default font in real device. But it isn't default in
   * browser. That's the main reason this line is here.*/
  font-family: "Fira Sans";
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  margin: 0;
  padding: 0;
  background-color: transparent;
}

#main-section {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

a {
  outline: 0;
}

a:hover, a:active, a:focus {
  outline: 0;
}

section {
  font-size: 1.6rem;
}

/* Card list */
#card-viewer {
  position: absolute;
  overflow: hidden;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: hidden;
}

#card-list-frame {
  position: absolute;
  width: 100%;
  height: 33.6rem;
  top: 32.41%;
  overflow: visible;
}

#card-list {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.25, 0, 0, 1);
  transform-origin: 0 50%;
}

#card-list.hidden {
  /* Using display none here would prevent animation, and using visibility
     hidden causes some bugs in rendering */
  opacity: 0;
}

#card-list.no-transition,
#folder-list.no-transition {
  transition-property: none;
}

.card {
  margin: 0;
  left: 0;
  top: 0;
  position: absolute;
  transition: transform 0.4s cubic-bezier(0.25, 0, 0, 1), filter 0.3s ease;
}

.card smart-button[type="app-button"].tv-channel {
  background-color: #272727;
}

.card smart-button[type="app-button"].tv-channel:before {
  font-size: 30rem;
  color: white;
}

.card smart-button[type="app-button"].new-card {
  opacity: 0;
  transform: scale(0.5, 0.5);
}

.card smart-button[type="app-button"].new-card-transition {
  transition: transform 0.4s cubic-bezier(0.25, 0, 0, 1) 0.2s,
              opacity 0.4s cubic-bezier(0.25, 0, 0, 1) 0.2s;
}

.card smart-button[type="app-button"].new-card-transition.last-card {
  transition-delay: 0s;
}

#folder-list .card smart-button[type="app-button"].new-card {
  opacity: 1;
  transform: translateY(-44rem);
}

#folder-list .card smart-button[type="app-button"].new-card-transition {
  transition: transform 0.4s cubic-bezier(0.25, 0, 0, 1),
              opacity 0.4s cubic-bezier(0.25, 0, 0, 1);
}

.card-panel {
  position: absolute;
  top: -23.14rem;
  width: 100%;
  height: 14.926rem;
  text-align: center;
  /* Use visibility hidden instead of display none here because display none
     may prevent transition happens */
  visibility: hidden;
  z-index: 0;
}

.card-panel smart-button {
  position: relative;
  margin-left: 1.86em;
  width: 14.926rem;
  height: 14.926rem;
  transform: translateY(12rem);
  opacity: 0;
}

.card-panel smart-button:first-child {
  margin-left: 0;
}

.card-panel smart-button[data-icon]::before {
  width: 10.074rem;
  left: 2.43rem;
  font-size: 10.07rem;
  line-height: 15.47rem;

}

.card smart-button.app-button {
  /* smart-button should be in front of card-panel */
  z-index: 1;
}

.card.focused {
  z-index: 100;
}

/**
 * folder list
 */

#folder-viewer {
  position: absolute;
  overflow: hidden;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: hidden;
}

#folder-list-frame {
  position: absolute;
  width: 100%;
  height: 33.6rem;
  top: calc(32.41% + 32.3rem);
  overflow: visible;
}

#folder-list {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.25, 0, 0, 1);
  transform-origin: 0 50%;
}

/**
 * filters
**/
.filter-tab-container {
  position: absolute;
  left: 6rem;
  bottom: 5.4rem;
}

.filter-tab-group.hidden {
  display: none;
}

/**
 * background section
**/
.background {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: rgba(0, 0, 0, 0.65);
  transition: background-color 0.66s linear;
}

.background:before {
  content: "";
  height: 29rem;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0));
}

.background:after {
  content: "";
  height: 29rem;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0));
}

#edit-menu {
  position: absolute;
  top: 4rem;
  right: 6rem;
}

/**
 * nav bars
 */
nav {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transition: transform 0.4s cubic-bezier(0.165, 0.840, 0.440, 1.000);
}

nav header {
  padding-left: 7rem;
  padding-top: 5rem;

  font-size: 5.4rem;
  font-style: italic;
  color: white;
}

#main-section[data-mode="edit"] #nav-regular,
#main-section[data-mode="arrange"] #nav-regular,
#main-section:not([data-mode="edit"]) #nav-edit-title,
#main-section:not([data-mode="edit"]) #nav-edit {
  transform: translateY(-16rem);
}

smart-button.hidden {
  display: none;
}


/* For smart-button, we put card name in pseudo-element :after. However, we need
 * to localize card name and l10n library do not support localizing element with
 * children elements.
 * Instead of using :after, we create a 'span' element under smart-button and
 * put card name in it.
 */
smart-button[type="app-button"]:after {
  content: none;
}

smart-button[type="app-button"] > span.name {
  position: absolute;
  bottom: 0;
  left: 0;

  width: 33.6rem;
  height: 8rem;

  padding-top: 1rem;

  line-height: 3rem;
  text-align: center;

  font-size: 2.8rem;
  font-style: italic;
  color: #ffffff;
}

smart-button[type="app-button"][app-type="deck"] > span.name {
  background-color: transparent;
}

smart-button[type="app-button"][app-type="tv"] > span.name {
  background-color: #d90c83;
}

smart-button[type="app-button"][app-type="app"] > span.name,
smart-button[type="app-button"][app-type="appbookmark"] > span.name {
  background-color: rgba(0, 0, 0, 0.4);
}

smart-button[type="app-button"][app-type="device"] > span.name {
  background-color: #4a82ea;
}