:root {
  color-scheme: dark;
  --catalog-bg: #080d16;
  --catalog-paper: #f5f1e8;
  --catalog-text: #d1d9e6;
  --catalog-muted: #aebbd0;
  --catalog-gold: #e8cb8f;
  --catalog-blue: #c0dbff;
  --catalog-rule: #334055;
  --catalog-serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--catalog-bg);
  color: var(--catalog-text);
  font: 1rem/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--catalog-blue);
  text-underline-offset: .24em;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--catalog-gold);
  outline-offset: 3px;
}

.skip {
  position: fixed;
  z-index: 200;
  top: 1rem;
  left: 1rem;
  padding: .6rem 1rem;
  background: var(--catalog-paper);
  color: var(--catalog-bg);
  transform: translateY(-200%);
}

.skip:focus { transform: none; }

.catalog-wrap {
  width: min(1120px, calc(100% - max(2rem, env(safe-area-inset-left, 0px) + env(safe-area-inset-right, 0px))));
  margin-inline: auto;
}

.catalog-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(15rem, .8fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  padding-block: clamp(3rem, 8vw, 7rem) clamp(2.5rem, 7vw, 5rem);
  background: radial-gradient(ellipse at 20% 0, #182437 0, transparent 66%);
}

.catalog-kicker {
  margin: 0 0 .6rem;
  color: var(--catalog-gold);
  font-size: .73rem;
  font-weight: 750;
  letter-spacing: .12em;
  line-height: 1.5;
  text-transform: uppercase;
}

.catalog-hero h1,
.section-heading h2 {
  margin: 0;
  color: var(--catalog-paper);
  font-family: var(--catalog-serif);
  font-weight: 400;
  letter-spacing: -.05em;
  line-height: 1.02;
}

.catalog-hero h1 { font-size: clamp(3.05rem, 8.4vw, 7.6rem); }
.catalog-hero h1 em { color: var(--catalog-gold); }

.catalog-intro {
  max-width: 44ch;
  margin: 1rem 0 0;
  font-size: clamp(1.02rem, 1.7vw, 1.2rem);
}

.catalog-index {
  border-top: 1px solid var(--catalog-gold);
}

.catalog-index a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  min-height: 48px;
  padding: .55rem 0;
  border-bottom: 1px solid var(--catalog-rule);
  color: var(--catalog-paper);
  font-weight: 650;
  text-decoration: none;
}

.catalog-index a:hover span:first-child { text-decoration: underline; }

.index-count {
  color: var(--catalog-gold);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.catalog-section {
  padding-block: clamp(2rem, 5.5vw, 4rem);
  border-top: 1px solid var(--catalog-rule);
  scroll-margin-top: 5rem;
}

.section-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: end;
  gap: .75rem 2rem;
  margin-bottom: 1.65rem;
}

.section-heading h2 { font-size: clamp(2.2rem, 5vw, 4.15rem); }

.section-heading > p {
  max-width: 38ch;
  margin: 0;
  color: var(--catalog-muted);
}

.app-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.app-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  padding: clamp(1rem, 2.5vw, 1.6rem);
  border: 1px solid var(--catalog-rule);
  border-radius: .8rem;
  background: linear-gradient(155deg, #172237, #0e1727 68%);
}

.app-mark {
  display: block;
  width: 4rem;
  height: 4rem;
  margin-bottom: 1rem;
  border-radius: .92rem;
}

.app-card h3,
.book-card h3,
.resource-grid h3 {
  margin: 0;
  color: var(--catalog-paper);
  font-family: var(--catalog-serif);
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 600;
  line-height: 1.24;
}

.app-card p,
.book-card p,
.resource-grid p {
  margin: .6rem 0 0;
}

.app-card .app-tagline {
  color: var(--catalog-paper);
  font-weight: 650;
}

.app-card .format-label,
.book-card .format-label {
  color: var(--catalog-muted);
  font-size: .85rem;
}

.app-card .format-label { margin-top: auto; padding-top: .75rem; }

.catalog-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 .9rem;
  margin-top: .45rem;
}

.catalog-actions a,
.catalog-link,
.catalog-footer a {
  display: inline-flex;
  align-items: center;
  gap: .38rem;
  min-height: 44px;
  color: var(--catalog-blue);
  font-size: .92rem;
  font-weight: 650;
}

.catalog-actions .catalog-primary {
  padding: .35rem .75rem;
  border: 1px solid #d7b777;
  border-radius: .38rem;
  background: var(--catalog-gold);
  color: #17130e;
  text-decoration: none;
}

.catalog-actions .catalog-primary:hover { background: #f4dba7; }

.book-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(1.35rem, 4vw, 3rem);
}

.book-card {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  align-items: start;
  gap: clamp(.8rem, 2vw, 1.3rem);
  padding-block: 1.15rem;
  border-top: 1px solid var(--catalog-rule);
}

.book-copy .catalog-kicker { margin-top: 0; margin-bottom: .32rem; }

.catalog-cover {
  display: block;
  width: 100%;
  height: auto;
  border-radius: .16rem;
  box-shadow: 0 8px 14px #050811b3;
}

.puzzle-label {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: .28rem;
  aspect-ratio: 2 / 3;
  padding: .4rem;
  border-block: 1px solid #a28251;
  background: radial-gradient(ellipse, #372837, transparent 84%);
  color: var(--catalog-gold);
}

.puzzle-label span:first-child {
  font: 400 clamp(1.6rem, 3vw, 2.3rem)/1 var(--catalog-serif);
}

.puzzle-label span:last-child {
  font-size: .66rem;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.section-link { margin-top: .5rem; }
.retailer-note { color: var(--catalog-muted); font-size: .92rem; }

.resource-grid article {
  padding: .85rem 0 0;
  border-top: 1px solid var(--catalog-rule);
}

.resource-grid h3 { font-size: 1.25rem; }

.catalog-footer {
  border-top: 1px solid var(--catalog-rule);
  color: var(--catalog-muted);
}

.catalog-footer .catalog-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: .5rem 1rem;
  padding-block: 1rem;
}

.catalog-footer a { margin-right: .85rem; }
.catalog-footer p { margin: 0; }

@media (max-width: 860px) {
  .catalog-hero { grid-template-columns: minmax(0, 1fr); gap: 1.65rem; }
  .catalog-index { max-width: 30rem; }
  .app-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  body > nav.site-header:not(.navigation-enhanced) { position: static !important; }
}

@media (max-width: 660px) {
  .app-grid,
  .book-grid,
  .resource-grid { grid-template-columns: minmax(0, 1fr); }
  .book-card { grid-template-columns: 90px minmax(0, 1fr); }
}

@media (max-width: 380px) {
  .book-card { grid-template-columns: 76px minmax(0, 1fr); }
  .catalog-hero h1 { font-size: 2.95rem; }
}

@media (forced-colors: active) {
  .catalog-actions .catalog-primary,
  .puzzle-label,
  .app-card { border-color: CanvasText; }
}