.stats {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.atlas-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.atlas-sidebar {
  padding: 16px;
}

.atlas-sidebar h3 {
  margin: 0 0 12px;
}

.atlas-list {
  display: grid;
  gap: 7px;
}

.atlas-list button {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: 2px 8px;
  align-items: center;
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0e2742;
  color: #d8e9f5;
  text-align: left;
  cursor: pointer;
}

.atlas-list button > span {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: #071827;
  color: var(--cyan);
  font-size: .76rem;
  font-weight: 900;
}

.atlas-list button small {
  color: var(--muted);
  font-size: .72rem;
  line-height: 1.25;
}

.atlas-list button.active {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--ink);
  font-weight: 800;
}

.atlas-list button.active > span {
  background: var(--ink);
  color: #fff;
}

.atlas-list button.active small {
  color: #17324a;
}

.atlas-viewer {
  min-width: 0;
}

.atlas-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 14px;
}

.atlas-heading h3 {
  margin: 9px 0 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.atlas-heading .btn {
  flex: 0 0 auto;
}

.atlas-figure {
  margin: 0;
  padding: 10px;
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
}

.atlas-figure picture,
.atlas-figure img {
  display: block;
  width: 100%;
}

.atlas-figure img {
  height: auto;
  max-height: 720px;
  object-fit: contain;
}

.atlas-figure figcaption {
  padding: 8px 6px 2px;
  color: #41566a;
  font-size: .78rem;
  text-align: center;
}

.atlas-notes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.atlas-checkpoint {
  border-left-color: var(--yellow);
}

@media (max-width: 900px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .atlas-shell {
    grid-template-columns: 1fr;
  }

  .atlas-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .stats,
  .atlas-list,
  .atlas-notes {
    grid-template-columns: 1fr;
  }

  .atlas-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .atlas-heading .btn {
    text-align: center;
  }

  .atlas-viewer {
    padding: 14px;
  }
}

@media print {
  .atlas-sidebar,
  .atlas-heading .btn {
    display: none !important;
  }

  .atlas-shell,
  .atlas-notes {
    grid-template-columns: 1fr;
  }

  .atlas-figure {
    border: 1px solid #aaa;
  }
}