.space-page {
  max-width: 1120px;
  padding-bottom: 4rem;
}

nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 650;
}

.space-hero {
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2rem, 4vw, 3rem);
}

.space-hero h1 {
  max-width: 960px;
}

.sources h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.6rem, 3vw, 2.45rem);
  font-weight: 570;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.sources p {
  color: #37413d;
}

.space-scope {
  margin: 1rem 0 0.45rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.height-lift {
  display: inline-block;
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(0.9rem, 1.6vw, 1.08rem);
  line-height: 1.5;
  white-space: normal;
}

.atlas-directory {
  display: block;
  padding: clamp(2.8rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--line);
  color: var(--text);
}

.atlas-directory h2 {
  margin-bottom: 0.55rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.directory-legend {
  max-width: 780px;
  margin-bottom: 1.8rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.directory-families {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: var(--line);
}

.directory-family {
  display: grid;
  grid-template-columns: minmax(7rem, 0.19fr) minmax(0, 0.81fr);
  gap: 1.25rem;
  padding: 0.8rem;
  background: var(--surface);
}

.directory-family h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  line-height: 1.1;
}

.directory-family h3 a {
  color: var(--text);
  text-decoration: none;
}

.directory-family h3 a:hover,
.directory-family h3 a:focus-visible {
  color: var(--accent);
}

.directory-family-count {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.62rem;
  font-weight: 500;
}

.directory-groups {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.42rem;
  min-width: 0;
}

.directory-group {
  display: grid;
  flex: 0 0 auto;
  gap: 0.28rem;
  min-width: 5.5rem;
  padding: 0.34rem 0.4rem 0.42rem;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text);
  text-align: center;
  text-decoration: none;
}

.directory-group:hover,
.directory-group:focus-visible {
  border-color: var(--accent);
  background: var(--background);
}

.directory-signature {
  justify-self: center;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.82rem;
  font-weight: 650;
  line-height: 1.1;
  white-space: nowrap;
}

.directory-palette {
  display: flex;
  width: 100%;
  min-width: 4rem;
  height: 1.15rem;
  overflow: hidden;
  border: 1px solid rgb(35 45 41 / 0.42);
  border-radius: 2px;
}

.directory-palette span {
  flex: 1 1 0;
  background: var(--directory-colour);
}

.directory-group-id {
  justify-self: center;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.58rem;
  line-height: 1;
}

.space-atlas {
  border-top: 1px solid var(--line);
}

.wallpaper-family {
  padding: clamp(3rem, 7vw, 6rem) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 1rem;
}

.wallpaper-family.is-empty {
  padding-block: clamp(2.2rem, 5vw, 3.5rem);
  background: linear-gradient(90deg, transparent, rgb(50 69 63 / 0.025), transparent);
}

.family-header {
  max-width: 900px;
  margin-bottom: 1.6rem;
}

.family-header h2 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 0.7rem;
  margin: 0 0 0.8rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 570;
  line-height: 1;
}

.family-orbifold {
  letter-spacing: -0.025em;
}

.family-count {
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.28em;
  font-weight: 500;
}

.space-tabbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: stretch;
  gap: 0.35rem;
  padding-inline: 0.15rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.space-tab {
  display: inline-flex;
  min-width: max-content;
  padding: 0.4rem 0.72rem 0.36rem;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: var(--surface-raised);
  color: var(--muted);
  flex-direction: column;
  text-align: center;
  text-decoration: none;
}

.space-tab:hover,
.space-tab:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.space-tab[aria-selected="true"] {
  border-bottom-color: var(--background);
  background: var(--background);
  color: var(--text);
  box-shadow: 0 2px 0 var(--background);
}

.tab-signature {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.02rem;
  font-weight: 650;
  line-height: 1.15;
}

.tab-meta {
  margin-top: 0.16rem;
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.space-entry[hidden] {
  display: none;
}

.space-entry {
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 0 8px 8px 8px;
  background: var(--background);
  box-shadow: 0 12px 28px rgb(35 45 41 / 0.05);
  scroll-margin-top: 1rem;
}

.entry-pair {
  display: grid;
  grid-template-columns: minmax(17rem, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.colouring-card {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f7f4ec;
}

.colouring-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.colouring-catalog-link {
  display: block;
}

.colouring-catalog-link,
.ucl-link {
  color: var(--accent);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.colouring-catalog-link span {
  display: block;
  padding: 0.55rem 0.72rem;
  border-top: 1px solid var(--line);
  background: var(--background);
  font-size: 0.7rem;
}

.space-group-summary {
  min-width: 0;
}

.space-group-name {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.5rem, 7vw, 5.4rem);
  font-weight: 570;
  letter-spacing: -0.045em;
  line-height: 0.95;
}

.space-group-name sub {
  font-size: 0.48em;
  vertical-align: -0.16em;
}

.orbifold-star {
  font-family: "STIX Two Math", "Cambria Math", "Times New Roman", serif;
  font-size: 1em;
  font-style: normal;
  font-weight: inherit;
  letter-spacing: 0;
  vertical-align: baseline;
}

.book-color-signature sup,
.tab-signature sup {
  font-size: 0.56em;
  line-height: 0;
  vertical-align: 0.68em;
}

.ucl-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.78rem;
}

.base-group {
  display: grid;
  grid-template-columns: 5.7rem minmax(0, 1fr);
  gap: 0.65rem;
  margin: 1rem 0 0;
  padding-block: 0.5rem;
  border-block: 1px solid var(--line);
  scroll-margin-top: 1rem;
  font-size: 0.76rem;
}

.base-group dt {
  color: var(--muted);
  font-weight: 650;
}

.base-group dd {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.7rem;
  margin: 0;
}

.base-orbifold {
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 650;
}

.base-group-link {
  font-weight: 650;
}

.base-only-entry {
  display: grid;
  grid-template-columns: minmax(17rem, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.base-only-entry .space-group-summary {
  grid-column: 2;
}

.space-group-presentation {
  margin-top: clamp(1.5rem, 4vw, 2.3rem);
}

.space-group-presentation h4 {
  margin: 0 0 0.22rem;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
}

.space-group-presentation table {
  width: 100%;
  border-collapse: collapse;
  border-block: 1px solid var(--line);
  font-size: 0.76rem;
}

.space-group-presentation th,
.space-group-presentation td {
  padding: 0.34rem 0.42rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.space-group-presentation th {
  width: 2.2rem;
  color: var(--accent);
  font-weight: 700;
}

.space-group-presentation tbody tr:last-child th,
.space-group-presentation tbody tr:last-child td {
  border-bottom: 0;
}

.generator-key {
  font-family: Georgia, "Times New Roman", serif;
}

.presentation-relations {
  display: flex;
  gap: 0.6rem;
  margin: 0.5rem 0 0;
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.8rem;
  line-height: 1.45;
}

.presentation-relations strong {
  flex: 0 0 auto;
  color: var(--muted);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.025em;
}

.presentation-relations span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.sources {
  max-width: 900px;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.sources p code {
  overflow-wrap: anywhere;
}

.space-page footer {
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 900px) {
  .entry-pair,
  .base-only-entry {
    grid-template-columns: 1fr;
  }

  .base-only-entry .space-group-summary {
    grid-column: 1;
  }

  .colouring-card {
    max-width: 720px;
  }
}

@media (max-width: 700px) {
  .directory-family {
    grid-template-columns: 1fr;
  }

  .directory-family {
    gap: 0.7rem;
  }

}

@media (max-width: 430px) {
  .space-page {
    width: min(calc(100% - 1rem), 1120px);
  }

  .space-entry {
    padding: 1rem 0.75rem;
  }

  .presentation-relations {
    flex-direction: column;
    gap: 0.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  .site-header,
  .atlas-directory {
    display: none;
  }

  .space-entry[hidden] {
    display: block;
  }

  .space-entry {
    break-inside: avoid;
    box-shadow: none;
  }
}