/* ============================================================================
   page-253.css — Category "thumbs" page (Itemid 253 / Engineering) overlay
   Design: .pen BMXn2 (exact-px source of truth)
   Scope: body.item-253 — auto-loaded LAST (after darkmode.css) by index.php.
   All colour/type/spacing route through design tokens so light + dark + all
   three directions (terminal/blueprint/signal) resolve. Distinct layout file
   html/com_content/category/thumbs.php — blog.php (Itemid 221) is untouched.
   Axes: light/dark × desktop / responsive (≤980 / ≤760 / ≤620)
   ============================================================================ */

/* ── Page-level custom properties ────────────────────────────────────────── */
body.item-253 {
  --cat-mast-end:  var(--elevated);
  --cat-mast-tint: color-mix(in srgb, var(--primary) 6%, transparent);
}
html.t4-dark body.item-253 {
  --cat-mast-end:  var(--chrome-elevated);
}

/* P58 — kill the T4 .t4-main-body top padding so the masthead sits flush. */
body.item-253 .t4-main-body { padding-top: 0 !important; }

/* ============================================================================
   MASTHEAD — radial tint band over --cat-mast-end (no grid; per BMXn2 export)
   ============================================================================ */
body.item-253 .hxcat-mast {
  padding: 60px 32px 52px;
  border-bottom: 1px solid var(--border);
  background-color: var(--cat-mast-end);
  background-image: radial-gradient(ellipse 75% 60% at 50% 0%, var(--cat-mast-tint) 0%, var(--cat-mast-end) 55%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

body.item-253 .hxcat-mast__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  max-width: 1240px;
  margin-inline: auto;
}

/* Breadcrumb */
body.item-253 .hxcat-bc {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.2;
}
body.item-253 .hxcat-bc__home { color: var(--text); text-decoration: none; transition: color .15s ease; }
body.item-253 .hxcat-bc__home:hover,
body.item-253 .hxcat-bc__home:focus-visible { color: var(--primary); outline: none; }
body.item-253 .hxcat-bc__rest { color: var(--muted); }
body.item-253 .hxcat-bc__crumb { color: var(--muted); text-decoration: none; transition: color .15s ease; }
body.item-253 .hxcat-bc__crumb:hover,
body.item-253 .hxcat-bc__crumb:focus-visible { color: var(--primary); outline: none; }

/* "// category" pill */
body.item-253 .hxcat-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  padding: 5px 12px;
  border-radius: 100px;
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 25%, transparent);
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 1.5px;
  color: var(--primary);
  text-transform: uppercase;
  white-space: nowrap;
}
body.item-253 .hxcat-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

/* H1 + subtitle */
body.item-253 .hxcat-h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 46px;
  font-weight: 700;
  letter-spacing: -1.3px;
  line-height: 1.08;
  color: var(--heading);
  margin: 0;
  max-width: 820px;
}
body.item-253 .hxcat-sub {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 17px;
  font-weight: 400;
  line-height: 1.588;
  color: var(--text);
  max-width: 600px;
  margin: 0;
}
body.item-253 .hxcat-sub p { margin: 0; }

/* ============================================================================
   BODY — 2-col: post rows (left) + sidebar (right)
   ============================================================================ */
body.item-253 .hxcat-body {
  padding: 56px 32px 72px;
  background: var(--bg);
}
body.item-253 .hxcat-grid {
  max-width: 1240px;
  margin-inline: auto;
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
body.item-253 .hxcat-main {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ── Post row ─────────────────────────────────────────────────────────────── */
/* MICRO-INTERACTION: CARD gesture (3a) — neutral border → primary border +
   2px lift + soft shadow on hover/focus; whole row is the <a>; title
   color-shifts too (3c). */
body.item-253 .hxcat-row {
  display: flex;
  align-items: stretch;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none;
  transition: border-color .15s ease, transform .2s ease, box-shadow .2s ease;
}
body.item-253 .hxcat-row:hover,
body.item-253 .hxcat-row:focus-visible {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px -12px color-mix(in srgb, var(--primary) 40%, transparent);
  outline: none;
}
body.item-253 .hxcat-row:hover .hxcat-row__title,
body.item-253 .hxcat-row:focus-visible .hxcat-row__title {
  color: var(--primary);
}
body.item-253 .hxcat-row__cover {
  flex: 0 0 200px;
  width: 200px;
  align-self: stretch;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
body.item-253 .hxcat-row__cover.is-empty {
  background-image: radial-gradient(ellipse 60% 60% at 50% 40%, color-mix(in srgb, var(--primary) 11%, transparent) 0%, var(--cat-mast-end) 85%);
}
body.item-253 .hxcat-row__body {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px;
}
body.item-253 .hxcat-tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 1px;
  color: var(--primary);
  text-transform: uppercase;
}
body.item-253 .hxcat-row__title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.263;
  color: var(--heading);
  transition: color .15s ease;
}
body.item-253 .hxcat-row__excerpt {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.571;
  color: var(--text);
}
body.item-253 .hxcat-row__meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
body.item-253 .hxcat-aside {
  flex: 0 0 300px;
  width: 300px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
body.item-253 .hxcat-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
}
body.item-253 .hxcat-card__h {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 1.5px;
  color: var(--muted);
  text-transform: uppercase;
}
/* MICRO-INTERACTION: LIST ROW gesture (3d) — subtle primary-tint bg on
   hover/focus, no lift. Negative-margin trick keeps text flush while the
   tint reaches the card's padded edges. */
body.item-253 .hxcat-catrow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 6px 8px;
  margin: -6px -8px;
  border-radius: 8px;
  text-decoration: none;
  transition: background-color .15s ease;
}
body.item-253 .hxcat-catrow:hover,
body.item-253 .hxcat-catrow:focus-visible {
  background: color-mix(in srgb, var(--primary) 6%, transparent);
  outline: none;
}
body.item-253 .hxcat-catrow__n {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 14px;
  font-weight: 400;
  color: var(--text);
  transition: color .15s ease;
}
body.item-253 .hxcat-catrow__c {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
}
body.item-253 .hxcat-catrow:hover .hxcat-catrow__n,
body.item-253 .hxcat-catrow:focus-visible .hxcat-catrow__n { color: var(--heading); }

body.item-253 .hxcat-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
/* MICRO-INTERACTION: PILL gesture — neutral border/text → primary tint on
   hover/focus (build-docs/micro-interactions.md §3d/3c). */
body.item-253 .hxcat-chip {
  display: inline-flex;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  font-weight: 400;
  color: var(--text);
  text-decoration: none;
  transition: border-color .15s ease, color .15s ease, background-color .15s ease;
}
body.item-253 .hxcat-chip:hover,
body.item-253 .hxcat-chip:focus-visible {
  border-color: var(--primary);
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  outline: none;
}

body.item-253 .hxcat-pagination { margin-top: 28px; }
body.item-253 .hxcat-empty { padding: 32px 0; }

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

/* ≤980px — sidebar drops below content */
@media (max-width: 980px) {
  body.item-253 .hxcat-grid { flex-direction: column; gap: 32px; }
  body.item-253 .hxcat-aside { flex: 1 1 auto; width: 100%; }
}

/* ≤860px — masthead title scale-down */
@media (max-width: 860px) {
  body.item-253 .hxcat-h1 { font-size: 38px; letter-spacing: -1.1px; }
}

/* ≤760px — mobile */
@media (max-width: 760px) {
  body.item-253 .hxcat-mast { padding: 40px 20px 36px; }
  body.item-253 .hxcat-mast__inner { gap: 14px; }
  body.item-253 .hxcat-h1 { font-size: 32px; letter-spacing: -1px; }
  body.item-253 .hxcat-sub { font-size: 15px; line-height: 1.55; }

  body.item-253 .hxcat-body { padding: 48px 20px 56px; }

  /* Rows stack: cover becomes a top banner */
  body.item-253 .hxcat-row { flex-direction: column; align-items: stretch; }
  body.item-253 .hxcat-row__cover { flex: 0 0 170px; width: 100%; height: 170px; }
  body.item-253 .hxcat-row__body { padding: 18px 20px; }
}

/* ≤620px */
@media (max-width: 620px) {
  body.item-253 .hxcat-body { padding: 40px 20px 48px; }
}

/* ============================================================================
   MICRO-INTERACTIONS — reduced-motion guard (build-docs/micro-interactions.md §4)
   ============================================================================ */
@media (prefers-reduced-motion: reduce) {
  body.item-253 .hxcat-row,
  body.item-253 .hxcat-row *,
  body.item-253 .hxcat-catrow,
  body.item-253 .hxcat-chip {
    transition-duration: .01ms !important;
  }
  body.item-253 .hxcat-row:hover,
  body.item-253 .hxcat-row:focus-visible {
    transform: none;
  }
}