html {
  height: 100%;
}

body {
  margin: 0;
  display: flex;
  height: 100%;
  font-family: sans-serif;
}

/* Filters */

aside {
  background-color: #333;
  color: white;
  width: 200px;
  overflow-y: auto;
}

ul {
  margin: 0;
  padding: 0;
  list-style-type: none;
}

.g-FilterTitle {
  padding: 0.5rem 1rem;
  background-color: #555;
  border-left: 8px solid transparent;
  font-weight: bold;
}

.g-Filter--Unselected {
  border-left: 8px solid #555;
}

.g-Filter--Selected {
  border-left: 8px solid #883333;
}

.g-Filter button {
  border: none;
  background-color: transparent;
  color: inherit;
  cursor: pointer;
  padding: 0.5rem 1rem;
  width: 100%;
  text-align: left;
}

.g-Filter button:hover {
  background-color: #888833;
}

/* Books */

main {
  width: 100%;
  padding: 1rem;
  overflow-y: auto;
}

header {
  font-size: 120%;
  margin-bottom: 1rem;
}

.g-Books {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  grid-gap: 1rem;
}

.g-Book {
  width: 13rem;
  align-self: center;
  border: 1px solid #DDDDDD;
}