/* ============================================================
   Case Studies Module — casestudies.css  v1.2.0
   Matches Sino Soft brand: --cs-accent, --cs-accent-sec, --cs-accent-ter
   ============================================================ */

:root {
  --cs-accent:      #e92d0c;
  --cs-accent-sec:  #f27505;
  --cs-accent-ter:  #f2b705;
  --cs-accent-dark: #b82208;
  --cs-surface:     #ffffff;
  --cs-surface-2:   #fdf8f5;
  --cs-border:      #ede4dc;
  --cs-ink:         #1c1007;
  --cs-ink-muted:   #6b5a4e;
  --cs-radius:      14px;
  --cs-transition:  .22s cubic-bezier(.4,0,.2,1);
}

/* ── Badges ── */
.cs-badge {
  display: inline-block;
  padding: .22rem .75rem;
  border-radius: 50px;
  font-size: .72rem;
  font-weight: 600;
  background: rgba(233,45,12,.1);
  color: var(--cs-accent);
  border: 1px solid rgba(233,45,12,.25);
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-right: .35rem;
  margin-bottom: .35rem;
}
.cs-badge--sec  { background: rgba(242,117,5,.1); color: var(--cs-accent-sec); border-color: rgba(242,117,5,.25); }
.cs-badge--gold { background: rgba(242,183,5,.12); color: #8a6400; border-color: rgba(242,183,5,.35); }
.cs-badge--light { background: rgba(255,255,255,.2); color: #fff; border-color: rgba(255,255,255,.4); }

/* ═══════════════════════════════════════════════════════════
   CARDS (grid + featured)
   ═══════════════════════════════════════════════════════════ */
.cs-card {
  display: flex;
  flex-direction: column;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  overflow: hidden;
  text-decoration: none !important;
  color: var(--cs-ink) !important;
  transition: box-shadow var(--cs-transition), transform var(--cs-transition);
  border-top: 3px solid var(--cs-accent);
}
.cs-card:hover {
  box-shadow: 0 8px 36px rgba(233,45,12,.15);
  transform: translateY(-3px);
  text-decoration: none;
}

.cs-card-img-wrap { position: relative; overflow: hidden; aspect-ratio: 16/9; background: var(--cs-surface-2); }
.cs-card-img      { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.cs-card:hover .cs-card-img { transform: scale(1.04); }
.cs-card-img-placeholder {
  width: 100%; height: 100%; min-height: 180px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; color: var(--cs-border);
  background: var(--cs-surface-2);
}

.cs-featured-badge {
  position: absolute; top: .75rem; right: .75rem;
  background: var(--cs-accent-ter);
  color: #5a4000;
  font-size: .65rem; font-weight: 700;
  padding: .2rem .6rem;
  border-radius: 50px;
  letter-spacing: .04em;
}

.cs-card-body  { padding: 1.25rem; display: flex; flex-direction: column; flex: 1; }
.cs-card-title { font-size: 1.05rem; font-weight: 700; margin: .4rem 0 .6rem; line-height: 1.3; color: var(--cs-ink); }
.cs-card-desc  { font-size: .875rem; color: var(--cs-ink-muted); line-height: 1.6; flex: 1; margin-bottom: .75rem; }
.cs-card-footer{ display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: .75rem; border-top: 1px solid var(--cs-border); }
.cs-card-client{ font-size: .75rem; color: var(--cs-ink-muted); }
.cs-card-link  { font-size: .78rem; font-weight: 600; color: var(--cs-accent); white-space: nowrap; }

/* ═══════════════════════════════════════════════════════════
   FEATURED CARDS
   ═══════════════════════════════════════════════════════════ */
.cs-featured-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--cs-radius);
  overflow: hidden;
  text-decoration: none !important;
  color: #fff !important;
  position: relative;
  min-height: 280px;
  transition: box-shadow var(--cs-transition), transform var(--cs-transition);
}
.cs-featured-card:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,.25); }

.cs-featured-img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transition: transform .5s ease;
}
.cs-featured-card:hover .cs-featured-img { transform: scale(1.04); }
.cs-featured-card::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.75) 0%, rgba(0,0,0,.2) 60%, transparent 100%);
}
.cs-featured-img--placeholder {
  background: var(--cs-surface-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--cs-border);
}

.cs-featured-body {
  position: relative; z-index: 1;
  margin-top: auto; padding: 1.5rem;
}
.cs-featured-title { font-size: 1.2rem; font-weight: 700; margin: .4rem 0 .5rem; line-height: 1.3; }
.cs-featured-card--primary .cs-featured-title { font-size: 1.5rem; }
.cs-featured-desc   { font-size: .875rem; opacity: .88; line-height: 1.6; margin-bottom: .75rem; }
.cs-featured-client { font-size: .75rem; opacity: .75; display: block; margin-bottom: .6rem; }

.cs-read-more {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .8rem; font-weight: 600;
  color: var(--cs-accent-ter);
  margin-top: .5rem;
}

/* ═══════════════════════════════════════════════════════════
   SLIDER
   ═══════════════════════════════════════════════════════════ */
.cs-slider-wrap {
  position: relative;
  overflow: hidden;
}
.cs-slider {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: .5rem .25rem 1rem;
}
.cs-slider::-webkit-scrollbar { display: none; }

.cs-slide {
  flex: 0 0 calc(33.333% - 1rem);
  min-width: 280px;
  scroll-snap-align: start;
}
@media (max-width: 768px) { .cs-slide { flex: 0 0 calc(80% - 1rem); } }
@media (max-width: 480px) { .cs-slide { flex: 0 0 calc(92% - 1rem); } }

.cs-slide-inner {
  display: flex; flex-direction: column;
  background: var(--cs-surface);
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  overflow: hidden;
  text-decoration: none !important;
  color: var(--cs-ink) !important;
  height: 100%;
  border-top: 3px solid var(--cs-accent);
  transition: box-shadow var(--cs-transition), transform var(--cs-transition);
}
.cs-slide-inner:hover { box-shadow: 0 8px 30px rgba(233,45,12,.15); transform: translateY(-2px); }

.cs-slide-img {
  height: 180px;
  background-size: cover; background-position: center;
  background-color: var(--cs-surface-2);
  transition: transform .4s ease;
}
.cs-slide-inner:hover .cs-slide-img { transform: scale(1.04); }
.cs-slide-img--placeholder {
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: var(--cs-border);
}

.cs-slide-body    { padding: 1.1rem; flex: 1; display: flex; flex-direction: column; }
.cs-slide-title   { font-size: 1rem; font-weight: 700; margin: .35rem 0 .5rem; line-height: 1.3; }
.cs-slide-desc    { font-size: .83rem; color: var(--cs-ink-muted); flex: 1; line-height: 1.55; margin-bottom: .6rem; }
.cs-slide-client  { font-size: .74rem; color: var(--cs-ink-muted); margin-top: auto; }

.cs-slider-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: #fff;
  border: 1px solid var(--cs-border);
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0,0,0,.12);
  z-index: 2;
  transition: all var(--cs-transition);
  font-size: .9rem;
  color: var(--cs-ink-muted);
}
.cs-slider-btn:hover { background: var(--cs-accent); color: #fff; border-color: var(--cs-accent); }
.cs-slider-prev { left: .5rem; }
.cs-slider-next { right: .5rem; }

/* ═══════════════════════════════════════════════════════════
   DETAIL PAGE
   ═══════════════════════════════════════════════════════════ */
.cs-detail-wrap { max-width: 1200px; }

.cs-detail.card {
  border: 1px solid var(--cs-border);
  border-radius: var(--cs-radius);
  border-top: 4px solid var(--cs-accent);
  box-shadow: 0 2px 24px rgba(0,0,0,.06);
}

.cs-detail-title {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.02em;
  margin-bottom: .5rem;
  padding-left: 1rem;
  border-left: 4px solid var(--cs-accent);
}

.cs-detail-meta {
  display: flex; flex-wrap: wrap; gap: .75rem 1.5rem;
  font-size: .82rem; color: var(--cs-ink-muted);
  padding: .5rem 0 1rem;
  border-bottom: 1px solid var(--cs-border);
}
.cs-detail-meta span { display: inline-flex; align-items: center; gap: .35rem; }
.cs-detail-ext { color: var(--cs-accent-sec); font-weight: 600; text-decoration: none; }
.cs-detail-ext:hover { text-decoration: underline; }

.cs-detail-hero img { border-radius: 10px; max-height: 500px; width: 100%; object-fit: cover; }
.cs-detail-intro p  { font-size: 1.1rem; color: var(--cs-ink-muted); line-height: 1.75; }

.cs-section { border-left: 3px solid var(--cs-accent); padding-left: 1.25rem; }
.cs-section-title {
  font-size: 1.15rem; font-weight: 700;
  display: flex; align-items: center; gap: .4rem;
  margin-bottom: .75rem;
}
.cs-section-icon { font-style: normal; }
.cs-section-body { font-size: .97rem; line-height: 1.8; color: var(--cs-ink); }
.cs-section-body p { margin-bottom: .75rem; }

.cs-tags { display: flex; align-items: center; flex-wrap: wrap; gap: .4rem; }
.cs-tags-label { font-size: .78rem; color: var(--cs-ink-muted); margin-right: .25rem; }
.cs-tag {
  display: inline-block; padding: .2rem .65rem;
  background: var(--cs-surface-2); border: 1px solid var(--cs-border);
  border-radius: 50px; font-size: .72rem; color: var(--cs-ink-muted);
}

/* Sidebar */
.cs-sidebar-card { border: 1px solid var(--cs-border); border-radius: var(--cs-radius); }
.cs-sidebar-title { font-size: .9rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--cs-accent); margin-bottom: 1rem; }
.cs-sidebar-list { list-style: none; padding: 0; margin: 0; }
.cs-sidebar-list li { display: flex; justify-content: space-between; align-items: flex-start; padding: .55rem 0; border-bottom: 1px solid var(--cs-border); font-size: .85rem; gap: .5rem; }
.cs-sidebar-list li:last-child { border-bottom: none; }
.cs-sidebar-list span { color: var(--cs-ink-muted); flex-shrink: 0; }
.cs-sidebar-list strong { text-align: right; }

.cs-related-item {
  display: flex; align-items: center; gap: .75rem;
  padding: .65rem 0; border-bottom: 1px solid var(--cs-border);
  text-decoration: none !important; color: var(--cs-ink) !important;
  transition: color var(--cs-transition);
}
.cs-related-item:last-child { border-bottom: none; }
.cs-related-item:hover { color: var(--cs-accent) !important; }
.cs-related-item strong { display: block; font-size: .85rem; line-height: 1.3; margin-bottom: .15rem; }
.cs-related-item small  { font-size: .75rem; color: var(--cs-ink-muted); }
.cs-related-thumb { width: 52px; height: 40px; object-fit: cover; border-radius: 6px; flex-shrink: 0; }

/* Prev / Next */
.cs-adjacent { gap: 1rem; }
.cs-adj-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .55rem 1.1rem;
  border: 1px solid var(--cs-border);
  border-radius: 50px;
  text-decoration: none !important;
  color: var(--cs-ink-muted) !important;
  font-size: .82rem;
  transition: all var(--cs-transition);
  max-width: 48%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cs-adj-btn:hover { border-color: var(--cs-accent); color: var(--cs-accent) !important; }
.cs-adj-btn--right { margin-left: auto; }

/* ═══════════════════════════════════════════════════════════
   LIST PAGE
   ═══════════════════════════════════════════════════════════ */
.cs-page-title    { font-size: clamp(1.8rem, 5vw, 3rem); font-weight: 800; color: var(--cs-ink); }
.cs-page-subtitle { font-size: 1.1rem; color: var(--cs-ink-muted); }

.cs-filter-btn {
  display: inline-block; padding: .4rem 1rem;
  border: 1px solid var(--cs-border);
  border-radius: 50px; font-size: .78rem; font-weight: 600;
  text-decoration: none !important;
  color: var(--cs-ink-muted) !important;
  transition: all var(--cs-transition);
  background: var(--cs-surface);
}
.cs-filter-btn:hover,
.cs-filter-btn.active {
  background: var(--cs-accent);
  color: #fff !important;
  border-color: var(--cs-accent);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  /* Featured cards: stack vertically with clear gap between each card */
  .cs-featured .col-12 { margin-bottom: 1rem; }
  .cs-featured-card { min-height: 240px; }
  .cs-featured-card--primary { min-height: 280px; }
}
@media (max-width: 576px) {
  .cs-card-body  { padding: 1rem; }
  .cs-detail-title { font-size: 1.4rem; padding-left: .75rem; }
  .cs-adj-btn { max-width: 100%; }
  .cs-adjacent { flex-direction: column; }
  /* Featured: full spacing on small screens */
  .cs-featured { row-gap: 1rem !important; }
  .cs-featured .col-12 { margin-bottom: 0; }
  .cs-featured-body { padding: 1rem; }
  .cs-featured-title { font-size: 1.1rem; }
  .cs-featured-card--primary .cs-featured-title { font-size: 1.25rem; }
}