.full-width {
  width: 100%;
}

.border {
  border: .15rem solid var(--bd-color);
}

.float-left {
  float: left;
}

.float-right {
  float: right ;
}
table {
  border-collapse: collapse;
}

table, th, td {
  border: var(--bd-width) var(--bd-style) var(--bd-color);
}

h2:after, h3:after {
  display : block ;
  content: '';
  margin-top: 0.2rem;
  border-bottom: var(--bd-width) var(--bd-style) var(--bd-color);
}

:root {
  --bg-color: ghostwhite;
  --fg-color: black;

  --bd-color: gray;
  --bd-width: .15rem;
  --bd-style: solid;

  --hv-fg-color: white;
  --hv-bg-color: silver;
  --header-width: 6rem;
}

html {
  background: var(--bg-color);
  color: var(--fg-color);
  list-style-position: inside;
}

body {
  top: 0;
  left: 0;
  margin: 0;
  display: flex;
  position: fixed;
  width: 100%;
  height: 100%;
  /*gap: 1rem;*/
}

header {
  width: fit-content;

  display: flex;
  flex-direction: column;
  height: 100%;
  border-right: var(--bd-width) var(--bd-style) var(--bd-color);
  overflow-y: auto;
  overflow-x: hidden;
  flex-shrink: 0;
  padding-right: 1rem;
}

header > nav {
  padding-left: .25rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  border-bottom: var(--bd-width) var(--bd-style) var(--bd-color);
}

nav {
  padding-left: 1rem;
  width: fit-content;
  display: flex;
  flex-direction: column;
}

main {
  /*margin-left: calc(var(--header-width) + 1rem);*/
  padding-left: 1rem;
  flex-shrink: 1;
  overflow-y: auto;
}