:root {
  --accent: #f00;
  --accent-back: #fff;
  --accent-text: #000;
  --text-light: #fff;
  --text-dark: #000;
  --back-light: #fff;
  --back-dark: #444;
  --link-light: #fff;
  --link-dark: #000;
  --disabled-link: #f00;
}
body {
  background: darkgrey;
  margin: 0;
  user-select: none;
}
x-page {
  width: 100%;
  max-width: 1024px;
  display: block;
  padding: 0;
  margin: auto;
  background: var(--back-light);
}
x-full-panel {
  height: 100vh;
  display: block;
}
x-centered {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
x-full-panel x-title {
  width: fit-content;
  background: none;
}
x-footer {
  background: var(--back-dark);
  color: var(--text-light);
  display: block;
  padding: 1em;
  margin: 0;
}
x-footer x-link, x-footer a {
  color: var(--link-light);
}
x-panel {
  display: block;
  margin: 4em 0;
  padding: 1px 0;
}
x-nav {
  background: var(--accent);
  color: var(--text-light);
  width: 100%;
  position: sticky;
  top: 0;
  left: 0;
  display: flex;
  align-items: stretch;
  justify-content: space-evenly;
  flex-direction: row;
  flex-wrap: nowrap;
  z-index: 1;
  margin: 0 0 2em 0;
  padding: 0.5em;
  box-sizing: border-box;
  text-align: center;
}
x-dropdown {
  display: block;
  position: relative;
  width: fit-content;
}
x-dropdown > x-dd-content {
  backdrop-filter: blur(10px);
  border: solid var(--accent) 0.2em;
  display: block;
  position: absolute;
  top: 100%;
  overflow: hidden;
  width: max-content;
  visibility: hidden;
  opacity: 0;
  transition: all ease .2s;
  padding: 0.1em;
  border-radius: 0 0 0.5em 0.5em;
  margin-top: 0.3em;
  text-align: left;
}
x-dropdown:hover > x-dd-content, x-dropdown:focus-within > x-dd-content{
  visibility: visible;
  opacity: 1;
}
x-link, x-breadcrumb {
  color: var(--link-dark);
  text-decoration: none;
  display: block;
  padding: 0.5em;
  cursor: pointer;
}
x-nav > x-link, x-nav > x-dropdown > x-link {
  color: var(--link-light);
}
x-link > a, x-breadcrumb > a {
  color: inherit;
  text-decoration: inherit;
  position: relative;
  width: 100%;
  display: inline-block;
  cursor: inherit;
}
x-link[disabled] {
  color: var(--disabled-link);
  cursor: not-allowed
}
x-link[arrow] > a::before {
  content: " ";
  display: inline-block;
  width: 0.5em;
  height: 0.5em;
  margin: 0 1em 0 0.5em;
  transform: rotate(45deg);
  border-top: solid var(--accent) 0.25em;
  border-right: solid var(--accent) 0.25em;
  transition: margin ease .2s;
}
x-link:hover > a::before {
  margin-right: 0.5em;
  margin-left: 1em;
}
x-column {
  width: fit-content;
  max-width: 40%;
  display: inline-block;
  margin: 1em;
}
x-title {
  width: 100%;
  background: var(--accent-back);
  color: var(-accent-text);
  display: block;
  padding: 1em 2em;
  box-sizing: border-box;
}
x-descr {
  margin: 2em;
  display: block;
  padding: 1px 0
}
x-title > * {
  display: inline-block;
}
x-breadcrumb {
  color: var(--accent);
  font-size: 90%;
  border-radius: 1em;
  padding: 0;
  margin: 0 0.5em;
}