/* Chapter 10 — CSS Grid */

body {
  margin: 0;
  padding: 1.5rem;
  background: #f2f5f8;
  color: #172235;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
}

.page {
  width: 94%;
  max-width: 68rem;
  margin: 0 auto;
}

nav {
  margin: 0 0 1.5rem;
  padding: 0.75rem;
  background: #dce6f0;
  border: 1px solid #9bafc4;
  border-radius: 0.75rem;
  text-align: center;
}

nav a {
  margin: 0.2rem;
  padding: 0.55rem 0.7rem;
  background: #ffffff;
  display: inline-block;
  border: 1px solid #6e88a3;
  border-radius: 0.45rem;
  color: #173f66;
  font-weight: 700;
}

header {
  margin: 0 0 1.5rem;
  padding: 2rem;
  background: #173f66;
  border-radius: 1rem;
  color: #ffffff;
  text-align: center;
}

header h1,
header h2,
.panel h3,
.panel h4,
.panel p {
  margin-top: 0;
}

header h2 {
  margin-bottom: 0;
  color: #dceaf7;
  font-size: 1rem;
  font-weight: 400;
}

.panel,
.panel-alt {
  margin: 0 0 1.25rem;
  padding: 1.25rem;
  background: #ffffff;
  border: 1px solid #bdcbd8;
  border-radius: 0.875rem;
}

.panel-alt {
  background: #e7eef5;
}

.explain {
  margin: 0.75rem 0 0;
  color: #42566b;
}

.grid-stage {
  display: grid;
  gap: 0.75rem;
  min-height: 10rem;
  padding: 0.75rem;
  background: #f8fafc;
  box-sizing: border-box;
  border: 2px dashed #7890a8;
}

.cell,
.area {
  min-width: 0;
  padding: 0.85rem;
  background: #cfe1f2;
  box-sizing: border-box;
  border: 2px solid #52799f;
  border-radius: 0.45rem;
  text-align: center;
  font-weight: 700;
}

.cell-b {
  background: #f6d6b8;
  border-color: #b66a2a;
}

.cell-c {
  background: #d7ead8;
  border-color: #4d8852;
}

.tracks-demo {
  grid-template-columns: 1fr 2fr 1fr;
  grid-template-rows: 4rem 6rem;
}

.placement-demo {
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(3, 4rem);
}

.wide-item {
  grid-column: 1 / 4;
}

.side-item {
  grid-column: 4;
  grid-row: 1 / span 2;
}

.offset-item {
  grid-column: 2 / span 2;
  grid-row: 3;
}

.areas-demo {
  grid-template-columns: minmax(9rem, 1fr) 2fr;
  grid-template-areas:
    "heading heading"
    "sidebar content"
    "footer footer";
}

.area-heading {
  grid-area: heading;
}

.area-sidebar {
  grid-area: sidebar;
}

.area-content {
  grid-area: content;
}

.area-footer {
  grid-area: footer;
}

.repeat-demo {
  grid-template-columns: repeat(4, 1fr);
}

.minmax-demo {
  grid-template-columns: minmax(8rem, 1fr) minmax(12rem, 2fr);
}

.fit-demo,
.fill-demo {
  min-height: 7rem;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.fill-demo {
  grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr));
}

.fixed-example {
  max-width: 54rem;
}

.item-demo {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 8rem;
}

.items-start {
  justify-items: start;
  align-items: start;
}

.items-center {
  justify-items: center;
  align-items: center;
}

.items-end {
  justify-items: end;
  align-items: end;
}

.content-demo {
  width: 100%;
  min-height: 18rem;
  grid-template-columns: repeat(2, 7rem);
  grid-template-rows: repeat(2, 4rem);
}

.content-start {
  justify-content: start;
  align-content: start;
}

.content-center {
  justify-content: center;
  align-content: center;
}

.content-between {
  justify-content: space-between;
  align-content: space-between;
}

.breakout-demo {
  display: grid;
  grid-template-columns:
    minmax(0, 1fr)
    minmax(0, 18rem)
    minmax(0, 18rem)
    minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  min-height: 14rem;
  padding: 0;
  background: transparent;
  border: none;
}

.breakout-copy {
  grid-area: 1 / 2 / 2 / 3;
  min-width: 0;
  padding: 1rem;
  background: #ffffff;
  border: 2px solid #52799f;
  border-radius: 0.45rem;
}

.breakout-copy h4 {
  margin: 0 0 0.5rem;
}

.breakout-copy p {
  margin: 0;
  color: #42566b;
  font-weight: 400;
}

.breakout-media {
  grid-area: 1 / 3 / 2 / 5;
  margin: 0;
  min-width: 0;
  overflow: hidden;
  border-radius: 0.45rem;
  border: 2px solid #52799f;
}

.breakout-media img {
  display: block;
  width: 100%;
  height: 14rem;
  object-fit: cover;
}

.code {
  color: #8a3f0e;
  font-weight: 700;
}