nightTab/css/header.css

.header {
  padding: calc(var(--gutter) * var(--header-shade-padding)) 0;
  width: 100%;
  position: relative;
  z-index: var(--z-index-header);
}

.is-bookmarks-show-link .header {
  position: fixed;
  top: 0;
  left: 0;
}

.header .header-shade,
.header .header-border {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
}

.is-header-shade-style-scroll .header .header-shade {
  transition: background-color var(--animation-speed-slow) ease-in-out;
  animation: none;
}

.is-header-shade-show .header .header-shade {
  background-color: rgb(var(--header-shade-color));
  opacity: var(--header-shade-opacity);
}

.is-header-shade-border-top .header .header-border {
  border-top: var(--line-width) solid rgb(var(--accent));
}

.is-header-shade-border-bottom .header .header-border {
  border-bottom: var(--line-width) solid rgb(var(--accent));
}

.header-edge {
  background-color: transparent;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  box-shadow: inset 0 0 0 var(--line-width) rgb(var(--accent)), inset 0 0 0 calc(var(--line-width) * 2) rgba(var(--accent), 0.25);
}

.header-area {
  margin: 0 calc(var(--gutter) * -1);
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: stretch;
}

.header-item {
  margin: var(--gutter);
  max-width: calc(100% - var(--gutter) * 2);
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: center;
  position: relative;
}

.header-search-input[type="text"] {
  padding-right: 3em;
}

.header-search-clear {
  position: absolute;
  top: 0;
  right: 0;
}

.is-header-alignment-horizontal-left .header-area {
  justify-content: flex-start;
}

.is-header-alignment-horizontal-center .header-area {
  justify-content: center;
}

.is-header-alignment-horizontal-right .header-area {
  justify-content: flex-end;
}

.is-layout-width-thin.is-header-search-grow .header-search,
.is-header-search-grow .header-search {
  flex-grow: 1;
  flex-basis: 100%;
}

@media (min-width: 550px) {
  .is-header-search-grow .header-search {
    flex-basis: initial;
  }
}

.header-search {
  width: 15vw;
  min-width: 15em;
}

.header-date,
.header-clock,
.header-search,
.header-edit-add,
.header-accent,
.header-greeting,
.header-menu {
  display: none;
}

.is-header-search-show .header-search,
.is-header-date-show .header-date,
.is-header-clock-show .header-clock,
.is-header-edit-add .header-edit-add,
.is-header-accent .header-accent,
.is-header-greeting .header-greeting,
.is-menu .header-menu {
  display: flex;
}