:root {
  --spacing: 1rem;
  --highlight-color: #52947c;
}

body {
  font-family: sans-serif;
}

/* Basic Layout Sections */

.layout {
  min-height: 100vh;
}

.header {
  display:flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
  padding: 0 var(--spacing);
  box-shadow:0 2px 16px rgba(0,0,0,0.1);
  position:relative;
  z-index: 1;
}

.stage,
.content,
.cart {
  padding: var(--spacing);
  overflow-y: auto;
}

.stage {
  position:relative;
}
.stage::after {
  content: "";
  position:absolute;
  z-index:-1;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background-color: var(--bg-color, var(--highlight-color));
  filter: brightness(1.5);
  transition: background-color .5s linear;
  opacity:0.25;
}

.booklist {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(201px, 1fr));
  gap: var(--spacing);
}

.cart {
  background-color: #f5f3f3;
}
.cart > * + * {
  margin-top: 1rem;
}

/* Desktop Layout */

@media (min-width: 1260px) {
  .layout {
    --spacing: 2rem;
    
    display:grid;
    height: 100vh;
    grid-template-rows: 3.5rem auto;
    grid-template-columns: 480px 1fr 130px;
    overflow-y: hidden;
  }
  .header {
    grid-column: 1 / -1;
  }
}

/* No-CQ Support Notice */

.support-notice {
  padding: 1rem;
  border-radius: .25rem;
  margin-bottom: var(--spacing);
  border: 2px solid salmon;
  background-color: rgba(salmon, .1);
  line-height: 1.4;
}

@supports (contain: layout inline-size) {
	.support-notice {
		display: none;
	}
}

/* Misc Helper Classes */

.gu-mirror {
  width: 180px !important;
}

.capitals {
  font-size: .75rem;
  font-weight: bold;
  letter-spacing:.25em;
  text-transform: uppercase;
  margin-bottom: var(--spacing);
}

.logo {
  font-family: "Merriweather", serif;
}

.by a {
  color: inherit;
  text-decoration:underline;
}