/* Browse the actual subject and reference inventory from the homepage. */
.subjects-overview .summary-page { gap: 24px; }
.subject-catalog-intro { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
body.portfolio-home .subject-catalog-intro h3 { margin: 0 0 8px; color: var(--page-text); font: 800 25px/1.3 'Manrope', sans-serif; letter-spacing: -.7px; text-transform: none; }
.subject-catalog-intro p { margin: 0; color: var(--page-muted); font-size: 13px; line-height: 1.8; }
.subject-catalog-intro .home-button { flex-shrink: 0; min-height: 48px; padding: 13px 18px; border-radius: 10px; }
.subject-catalog-section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 20px; margin-bottom: 14px; }
body.portfolio-home .subject-catalog-section-head h3 { color: var(--page-text); font: 700 16px/1.4 'Manrope', sans-serif; margin: 0; letter-spacing: -.2px; text-transform: none; }
.subject-catalog-section-head > span { color: var(--page-muted); font-size: 11px; }
.subject-catalog-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.subject-catalog-group { min-width: 0; padding: 18px; border: 1px solid var(--page-line); border-top: 3px solid var(--page-accent); border-radius: 12px; background: var(--page-bg); }
.subject-catalog-group > header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.subject-catalog-group > header > span { display: grid; place-items: center; flex: 0 0 28px; height: 28px; border-radius: 7px; color: var(--page-accent); background: var(--page-tint); font: 500 10px 'IBM Plex Mono', monospace; }
body.portfolio-home .subject-catalog-group h3 { margin: 0; color: var(--page-text); font: 700 13px/1.5 'Manrope', sans-serif; text-transform: none; letter-spacing: 0; }
.subject-catalog-group small { margin-left: auto; color: var(--page-muted); font: 11px 'IBM Plex Mono', monospace; }
.subject-catalog-group ul { list-style: none; margin: 0; padding: 0; }
.subject-catalog-group li + li { border-top: 1px solid var(--page-line); }
body.portfolio-home .subject-catalog-link { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 41px; padding: 9px 7px; border-radius: 6px; color: var(--page-text) !important; font-size: 12px; line-height: 1.5; transition: background .18s, color .18s; }
.subject-catalog-link > span:last-child { color: var(--page-accent); }
body.portfolio-home .subject-catalog-link:hover { background: var(--page-tint); color: var(--page-accent) !important; }
.subject-reference-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; list-style: none; padding: 0; margin: 0; }
.subject-reference-grid li { min-width: 0; }
body.portfolio-home .subject-reference-link { position: relative; display: flex; flex-direction: column; gap: 5px; min-height: 72px; padding: 13px 30px 13px 15px; border: 1px solid var(--page-line); border-radius: 10px; background: var(--page-bg); color: var(--page-text) !important; transition: border-color .18s, transform .18s; }
.subject-reference-link:hover { border-color: var(--page-accent) !important; transform: translateY(-2px); }
.subject-reference-tag { color: var(--page-accent); font-size: 10px; font-weight: 700; line-height: 1.4; }
.subject-reference-name { color: var(--page-text); font-size: 12px; font-weight: 600; line-height: 1.5; }
.subject-reference-arrow { position: absolute; top: 13px; right: 12px; color: var(--page-accent); font-size: 13px; }
.subjects-overview .summary-section-foot { margin-top: auto; }
@media (min-width: 1101px) and (max-height: 1000px) {
  .subjects-overview .summary-page { gap: 18px; }
  body.portfolio-home .subject-catalog-intro h3 { font-size: 22px; margin-bottom: 5px; }
  .subject-catalog-intro p { font-size: 12px; }
  .subject-catalog-section-head { margin-bottom: 10px; }
  .subject-catalog-group { padding: 14px; }
  .subject-catalog-group > header { margin-bottom: 8px; }
  body.portfolio-home .subject-catalog-link { min-height: 36px; padding-block: 7px; }
  body.portfolio-home .subject-reference-link { min-height: 66px; padding-block: 10px; }
}
@media (max-width: 1100px) {
  .subject-catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .subject-reference-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 800px) {
  .subject-catalog-intro { align-items: flex-start; flex-direction: column; gap: 18px; }
  body.portfolio-home .subject-catalog-intro h3 { font-size: 23px; }
  .subject-reference-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .subject-catalog-group { padding: 14px; }
  .subjects-overview .summary-page { gap: 28px; }
}
@media (max-width: 540px) {
  .subject-catalog-grid { grid-template-columns: 1fr; }
  .subject-catalog-group > header { margin-bottom: 8px; }
  body.portfolio-home .subject-catalog-link { min-height: 44px; font-size: 13px; }
  body.portfolio-home .subject-reference-link { min-height: 80px; padding-left: 12px; }
  .subject-reference-name { font-size: 11px; }
}

/* Icons identify categories, topics and technologies at a glance. */
.subject-catalog-group { --catalog-category: var(--page-accent); --catalog-category-tint: rgba(100,181,246,.12); background: linear-gradient(145deg, var(--catalog-category-tint), transparent 55%), var(--page-bg); border-top-color: var(--catalog-category); transition: border-color .2s, box-shadow .2s, transform .2s; }
.subject-catalog-group.catalog-group-automation { --catalog-category: #258eaa; --catalog-category-tint: rgba(37,142,170,.10); }
.subject-catalog-group.catalog-group-oop { --catalog-category: #7374c8; --catalog-category-tint: rgba(115,116,200,.10); }
.subject-catalog-group.catalog-group-tools { --catalog-category: #3c80bb; --catalog-category-tint: rgba(60,128,187,.10); }
.dark .subject-catalog-group.catalog-group-automation { --catalog-category: #79d3df; }
.dark .subject-catalog-group.catalog-group-oop { --catalog-category: #b2b0ff; }
.dark .subject-catalog-group.catalog-group-tools { --catalog-category: #94c8ff; }
.subject-catalog-group:focus-within, .subject-catalog-group:hover { border-color: var(--catalog-category); box-shadow: 0 7px 22px rgba(0,0,0,.07); transform: translateY(-2px); }
.subject-catalog-group > header > .subject-category-icon { flex-basis: 42px; width: 42px; height: 42px; border-radius: 11px; background: var(--catalog-category-tint); color: var(--catalog-category); }
.subject-category-icon svg { width: 24px; height: 24px; }
body.portfolio-home .subject-catalog-group h3 { font-size: 14px; }
.subject-catalog-group small { padding: 4px 7px; border-radius: 6px; background: var(--catalog-category-tint); color: var(--catalog-category); }
body.portfolio-home .subject-catalog-link { gap: 9px; }
.subject-topic-icon { display: grid; place-items: center; flex: 0 0 19px; color: var(--catalog-category); opacity: .8; }
.subject-topic-icon svg { width: 17px; height: 17px; }
.subject-topic-name { flex: 1; }
body.portfolio-home .subject-catalog-link:hover { background: var(--catalog-category-tint); }
.subject-catalog-section-head h3 { display: flex; align-items: center; gap: 9px; }
.subject-catalog-section-head h3 > svg { width: 19px; height: 19px; color: var(--page-accent); }
body.portfolio-home .subject-reference-link { display: grid; grid-template-columns: 32px minmax(0, 1fr); align-items: center; column-gap: 12px; padding-right: 25px; }
.subject-reference-copy { display: flex; flex-direction: column; gap: 5px; }
.catalog-technology-mark { --mark-bg: rgba(44,132,206,.14); --mark-color: #1767a9; display: grid; place-items: center; width: 32px; height: 36px; border-radius: 9px; background: var(--mark-bg); color: var(--mark-color); font: 700 13px 'IBM Plex Mono', monospace; }
.catalog-technology-mark svg { width: 22px; height: 22px; }
.catalog-technology-mark img { display: block; width: 24px; height: 28px; object-fit: contain; }
.catalog-tone-green { --mark-bg: rgba(52,155,104,.13); --mark-color: #207245; }
.catalog-tone-violet { --mark-bg: rgba(125,101,205,.13); --mark-color: #7150ad; }
.catalog-tone-orange { --mark-bg: rgba(213,117,61,.13); --mark-color: #a75321; }
.catalog-tone-cyan { --mark-bg: rgba(25,144,170,.13); --mark-color: #147488; }
.dark .catalog-technology-mark { --mark-color: #9cceff; }
.dark .catalog-tone-green { --mark-color: #8fd6ab; }
.dark .catalog-tone-violet { --mark-color: #bda9f5; }
.dark .catalog-tone-orange { --mark-color: #efb18a; }
.dark .catalog-tone-cyan { --mark-color: #86d6e2; }
.subject-reference-link:hover .catalog-technology-mark { transform: scale(1.06); transition: transform .18s; }
@media (min-width: 1101px) and (max-height: 1000px) {
  .subject-catalog-group > header > .subject-category-icon { flex-basis: 34px; width: 34px; height: 34px; border-radius: 9px; }
  .subject-category-icon svg { width: 21px; height: 21px; }
  body.portfolio-home .subject-catalog-group h3 { font-size: 13px; }
}
@media (max-width: 540px) {
  .subject-catalog-group > header > .subject-category-icon { flex-basis: 38px; width: 38px; height: 38px; }
  body.portfolio-home .subject-reference-link { grid-template-columns: 26px minmax(0, 1fr); gap: 9px; padding-right: 19px; }
  .catalog-technology-mark { width: 26px; height: 32px; font-size: 11px; }
  .catalog-technology-mark svg { width: 18px; height: 18px; }
  .subject-reference-arrow { right: 7px; font-size: 11px; }
}