/* ============================================================
   Blog The Tech — Category Archive
   assets/category.css
   ============================================================ */

/* ── Tokens ───────────────────────────────────────────────── */
:root {
  --btt-ink:        #0d1117;
  --btt-ink-muted:  #4a5568;
  --btt-ink-faint:  #94a3b8;
  --btt-surface:    #ffffff;
  --btt-ground:     #f7f8fa;
  --btt-border:     #e8eaed;
  --btt-border-mid: #d1d5db;

  --btt-night:      #080e1a;
  --btt-night-mid:  #0f1b2d;
  --btt-night-rim:  rgba(255,255,255,.07);

  --btt-accent:     #1d4ed8;
  --btt-accent-lt:  #3b82f6;
  --btt-accent-sky: #bfdbfe;

  --btt-radius-sm:  10px;
  --btt-radius-md:  16px;
  --btt-radius-lg:  24px;

  --btt-font:       'Plus Jakarta Sans', system-ui, sans-serif;
  --btt-ease:       cubic-bezier(.22,.68,0,1.2);
}

/* ── Breadcrumb ───────────────────────────────────────────── */
.btt-breadcrumb {
  background: var(--btt-night);
  padding: 10px 24px 0;
}

.btt-breadcrumb__list {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  font-family: var(--btt-font);
  font-size: 11px;
  color: rgba(255,255,255,.35);
}

.btt-breadcrumb__list li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btt-breadcrumb__list li + li::before {
  content: '/';
  opacity: .3;
}

.btt-breadcrumb__list a {
  color: rgba(255,255,255,.5);
  text-decoration: none;
  transition: color .15s ease;
}

.btt-breadcrumb__list a:hover { color: #fff; }

.btt-breadcrumb__list [aria-current="page"] {
  color: rgba(255,255,255,.7);
  font-weight: 600;
}

/* ── Category Hero ────────────────────────────────────────── */
.btt-cat-hero {
  background: var(--btt-night);
  padding: 24px 24px 30px;
  border-bottom: 1px solid rgba(255,255,255,.04);
  position: relative;
  overflow: hidden;
}

.btt-cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 0% 60%, rgba(29,78,216,.12) 0%, transparent 55%);
  pointer-events: none;
}

/* Bottom accent line */
.btt-cat-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--btt-accent-lt), transparent 70%);
}

.btt-cat-hero__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  position: relative;
}

.btt-cat-hero__left {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  flex: 1;
  min-width: 260px;
}

.btt-cat-hero__icon {
  font-size: 24px;
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.06);
  border-radius: var(--btt-radius-sm);
  border: 1px solid rgba(255,255,255,.09);
}

.btt-cat-hero__label {
  font-family: var(--btt-font);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--btt-accent-sky);
  margin: 0 0 6px;
}

.btt-cat-hero__title {
  font-family: var(--btt-font);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 900;
  color: #f1f5f9;
  line-height: 1.15;
  margin: 0 0 8px;
  letter-spacing: -.4px;
}

.btt-cat-hero__desc {
  font-family: var(--btt-font);
  font-size: 13px;
  color: rgba(255,255,255,.55);
  line-height: 1.7;
  margin: 0;
  max-width: 480px;
}

.btt-cat-hero__desc strong {
  color: rgba(255,255,255,.82);
  font-weight: 700;
}

/* Stats block */
.btt-cat-hero__stats {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--btt-radius-md);
  padding: 14px 20px;
  flex-shrink: 0;
  align-self: center;
}

.btt-cat-hero__stat {
  text-align: center;
  padding: 0 16px;
}

.btt-cat-hero__stat-n {
  font-family: var(--btt-font);
  font-size: 24px;
  font-weight: 900;
  color: #f1f5f9;
  display: block;
  letter-spacing: -.4px;
  line-height: 1.1;
}

.btt-cat-hero__stat-l {
  font-family: var(--btt-font);
  font-size: 10px;
  font-weight: 700;
  color: rgba(255,255,255,.38);
  text-transform: uppercase;
  letter-spacing: .8px;
  display: block;
  margin-top: 4px;
}

.btt-cat-hero__stat-div {
  width: 1px;
  height: 30px;
  background: rgba(255,255,255,.1);
  flex-shrink: 0;
}

/* ── Sub-category Filter Pills ────────────────────────────── */
.btt-cat-filters {
  background: var(--btt-surface);
  border-bottom: 1px solid var(--btt-border);
  position: sticky;
  top: 0;
  z-index: 40;
}

.btt-cat-filters__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.btt-cat-filters__scroll {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 0;
  scrollbar-width: none;
}

.btt-cat-filters__scroll::-webkit-scrollbar { display: none; }

.btt-cat-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 13px;
  border-radius: 999px;
  white-space: nowrap;
  font-family: var(--btt-font);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  background: var(--btt-ground);
  border: 1.5px solid var(--btt-border);
  color: var(--btt-ink-muted);
  transition: border-color .15s ease, background .15s ease, color .15s ease;
  flex-shrink: 0;
}

.btt-cat-filter-pill:hover {
  border-color: var(--btt-accent-lt);
  color: var(--btt-accent);
  background: #eff6ff;
}

.btt-cat-filter-pill.is-active {
  background: var(--btt-night);
  border-color: var(--btt-night);
  color: #fff;
}

.btt-cat-filter-pill.is-active .btt-cat-filter-pill__count {
  background: rgba(255,255,255,.12);
  color: rgba(255,255,255,.6);
}

.btt-cat-filter-pill__count {
  font-size: 10.5px;
  font-weight: 700;
  background: var(--btt-border);
  color: var(--btt-ink-faint);
  padding: 1px 6px;
  border-radius: 999px;
}

/* ── Body layout ──────────────────────────────────────────── */
.btt-cat-body {
  background: var(--btt-ground);
  padding: 28px 24px 64px;
}

.btt-cat-body__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 248px;
  gap: 28px;
}

/* ── Toolbar ──────────────────────────────────────────────── */
.btt-cat-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.btt-cat-toolbar__count {
  font-family: var(--btt-font);
  font-size: 12px;
  color: var(--btt-ink-faint);
  margin: 0;
}

.btt-cat-toolbar__count strong {
  color: var(--btt-ink);
  font-weight: 800;
}

.btt-cat-toolbar__sort {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btt-cat-toolbar__sort-label {
  font-family: var(--btt-font);
  font-size: 11.5px;
  color: var(--btt-ink-faint);
  font-weight: 500;
}

.btt-cat-toolbar__sort-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.btt-cat-toolbar__sort-wrap svg {
  position: absolute;
  right: 10px;
  pointer-events: none;
  color: var(--btt-ink-faint);
}

.btt-cat-toolbar__select {
  font-family: var(--btt-font);
  font-size: 12px;
  font-weight: 600;
  color: var(--btt-ink);
  background: var(--btt-surface);
  border: 1.5px solid var(--btt-border);
  border-radius: var(--btt-radius-sm);
  padding: 6px 32px 6px 12px;
  appearance: none;
  cursor: pointer;
  outline: none;
  transition: border-color .15s ease;
}

.btt-cat-toolbar__select:focus {
  border-color: var(--btt-accent-lt);
}

/* ── Article Card Grid ────────────────────────────────────── */
.btt-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.btt-cat-card {
  background: var(--btt-surface);
  border: 1px solid var(--btt-border);
  border-radius: var(--btt-radius-md);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: border-color .2s ease,
              box-shadow .2s ease,
              transform .2s var(--btt-ease);
}

.btt-cat-card:hover {
  border-color: var(--btt-accent-sky);
  box-shadow: 0 8px 24px rgba(13,17,23,.07), 0 2px 6px rgba(13,17,23,.04);
  transform: translateY(-3px);
}

/* Thumbnail */
.btt-cat-card__thumb {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--btt-ground);
}

.btt-cat-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}

.btt-cat-card:hover .btt-cat-card__thumb img {
  transform: scale(1.04);
}

.btt-cat-card__thumb--fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--btt-font);
  font-size: 32px;
  font-weight: 900;
  color: var(--btt-accent);
  background: radial-gradient(circle at 20% 20%, rgba(59,130,246,.1), transparent 60%),
              linear-gradient(160deg, #eef2ff, var(--btt-ground));
}

/* Card body */
.btt-cat-card__body {
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 6px;
}

.btt-cat-card__tag {
  font-family: var(--btt-font);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--btt-accent);
}

.btt-cat-card__title {
  font-family: var(--btt-font);
  font-size: 14px;
  font-weight: 800;
  color: var(--btt-ink);
  line-height: 1.45;
  margin: 0;
  letter-spacing: -.1px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.btt-cat-card:hover .btt-cat-card__title {
  color: var(--btt-accent);
}

.btt-cat-card__excerpt {
  font-family: var(--btt-font);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--btt-ink-muted);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.btt-cat-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--btt-border);
  margin-top: auto;
}

.btt-cat-card__date {
  font-family: var(--btt-font);
  font-size: 11px;
  color: var(--btt-ink-faint);
}

.btt-cat-card__read {
  font-family: var(--btt-font);
  font-size: 11px;
  font-weight: 600;
  color: var(--btt-ink-faint);
}

/* ── Empty state ──────────────────────────────────────────── */
.btt-cat-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 24px;
  font-family: var(--btt-font);
}

.btt-cat-empty__icon {
  font-size: 40px;
  margin-bottom: 14px;
}

.btt-cat-empty__heading {
  font-size: 18px;
  font-weight: 900;
  color: var(--btt-ink);
  margin: 0 0 8px;
}

.btt-cat-empty p {
  font-size: 13.5px;
  color: var(--btt-ink-muted);
  margin: 0 0 20px;
}

.btt-cat-empty__cta {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--btt-accent);
  text-decoration: none;
  border: 1.5px solid var(--btt-accent-sky);
  padding: 9px 20px;
  border-radius: 999px;
  transition: background .18s ease, color .18s ease;
}

.btt-cat-empty__cta:hover {
  background: var(--btt-accent);
  color: #fff;
}

/* ── Pagination ───────────────────────────────────────────── */
.btt-cat-pagination { margin-bottom: 32px; }

.btt-cat-pagination .page-numbers {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
  align-items: center;
}

.btt-cat-pagination .page-numbers li { display: block; }

.btt-cat-pagination .page-numbers a,
.btt-cat-pagination .page-numbers span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border-radius: var(--btt-radius-sm);
  border: 1.5px solid var(--btt-border);
  background: var(--btt-surface);
  font-family: var(--btt-font);
  font-size: 13px;
  font-weight: 600;
  color: var(--btt-ink-muted);
  text-decoration: none;
  transition: border-color .15s ease, background .15s ease, color .15s ease;
}

.btt-cat-pagination .page-numbers a:hover {
  border-color: var(--btt-accent-lt);
  color: var(--btt-accent);
  background: #eff6ff;
}

.btt-cat-pagination .page-numbers .current {
  background: var(--btt-night);
  border-color: var(--btt-night);
  color: #fff;
}

.btt-cat-pagination .page-numbers .dots {
  border: none;
  background: none;
  color: var(--btt-ink-faint);
}

/* ── Sidebar ──────────────────────────────────────────────── */
.btt-cat-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.btt-cat-sidebar-block {
  background: var(--btt-surface);
  border: 1px solid var(--btt-border);
  border-radius: var(--btt-radius-md);
  padding: 20px;
}

.btt-cat-sidebar-block__title {
  font-family: var(--btt-font);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--btt-ink-faint);
  margin: 0 0 14px;
}

/* Topics list */
.btt-cat-topics-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.btt-cat-topics-list li.is-active .btt-cat-topics-list__link {
  background: #eff6ff;
  color: var(--btt-accent);
  border-color: var(--btt-accent-sky);
}

.btt-cat-topics-list__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  border-radius: var(--btt-radius-sm);
  border: 1px solid transparent;
  font-family: var(--btt-font);
  font-size: 13px;
  font-weight: 500;
  color: var(--btt-ink-muted);
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}

.btt-cat-topics-list__link:hover {
  background: var(--btt-ground);
  color: var(--btt-ink);
}

.btt-cat-topics-list__count {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--btt-ink-faint);
  background: var(--btt-ground);
  padding: 1px 7px;
  border-radius: 999px;
}

/* Newsletter block */
.btt-cat-sidebar-block--newsletter {
  background: var(--btt-night);
  border-color: rgba(255,255,255,.06);
  position: relative;
  overflow: hidden;
}

.btt-cat-sidebar-block--newsletter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 100% 0%, rgba(29,78,216,.22) 0%, transparent 60%);
  pointer-events: none;
}

.btt-cat-sidebar-newsletter__eyebrow {
  font-family: var(--btt-font);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--btt-accent-sky);
  margin: 0 0 8px;
  position: relative;
}

.btt-cat-sidebar-newsletter__title {
  font-family: var(--btt-font);
  font-size: 16px;
  font-weight: 900;
  color: #f1f5f9;
  margin: 0 0 8px;
  letter-spacing: -.2px;
  position: relative;
}

.btt-cat-sidebar-newsletter__desc {
  font-family: var(--btt-font);
  font-size: 12.5px;
  color: rgba(255,255,255,.55);
  line-height: 1.65;
  margin: 0 0 16px;
  position: relative;
}

.btt-cat-sidebar-newsletter__btn {
  display: block;
  text-align: center;
  font-family: var(--btt-font);
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: .3px;
  color: var(--btt-night);
  background: #f1f5f9;
  border-radius: 999px;
  padding: 10px 16px;
  text-decoration: none;
  position: relative;
  transition: background .18s ease;
}

.btt-cat-sidebar-newsletter__btn:hover {
  background: var(--btt-accent-sky);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 960px) {
  .btt-cat-body__inner {
    grid-template-columns: 1fr;
  }

  .btt-cat-sidebar {
    display: none;
  }
}

@media (max-width: 640px) {
  .btt-cat-hero__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .btt-cat-hero__stats {
    align-self: flex-start;
  }

  .btt-cat-grid {
    grid-template-columns: 1fr;
  }

  .btt-cat-body {
    padding-inline: 14px;
  }
}