/* =========================================================
   Auto Liên Kết Nội Bộ v2.0 — Modern CSS
   ========================================================= */

.ill-wrapper {
  --ill-radius: 14px;
  --ill-gap: 1.25rem;
  --ill-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  --ill-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);

  margin: 2.75rem 0 1.5rem;
  padding: 0;
  font-family: inherit;
  color: var(--ill-text);
  box-sizing: border-box;
}

.ill-wrapper *,
.ill-wrapper *::before,
.ill-wrapper *::after {
  box-sizing: border-box;
}

/* ---------- Head / Kicker ---------- */
.ill-head {
  margin-bottom: 0.75rem;
}

.ill-kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ill-accent);
  opacity: 0.95;
}

.ill-kicker-small {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ill-accent);
  margin-bottom: 0.35rem;
  opacity: 0.9;
}

/* ---------- Horizontal Layout ---------- */
.ill-horizontal {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--ill-gap);
}

.ill-item {
  min-width: 0;
}

.ill-card {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  height: 100%;
  min-height: 120px;
  text-decoration: none;
  color: inherit;
  background: var(--ill-bg);
  border: 1px solid var(--ill-border);
  border-radius: var(--ill-radius);
  overflow: hidden;
  box-shadow: var(--ill-shadow);
  transition: transform var(--ill-transition), box-shadow var(--ill-transition), border-color var(--ill-transition);
}

.ill-card:hover,
.ill-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.18);
  border-color: var(--ill-accent);
  outline: none;
}

.ill-media {
  flex: 0 0 42%;
  max-width: 180px;
  position: relative;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.08);
}

.ill-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.45s ease;
}

.ill-card:hover .ill-thumb {
  transform: scale(1.06);
}

.ill-body {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem 1.15rem;
  min-width: 0;
}

.ill-title {
  font-size: 1.05rem;
  font-weight: 650;
  line-height: 1.35;
  margin: 0 0 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--ill-text);
}

.ill-cta {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ill-accent);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: gap var(--ill-transition);
}

.ill-card:hover .ill-cta {
  gap: 0.45rem;
}

/* No thumbnail */
.ill-item.no-thumb .ill-card {
  flex-direction: column;
}
.ill-item.no-thumb .ill-body {
  padding: 1.25rem 1.35rem;
}

/* ---------- Overlay Layout ---------- */
.ill-overlay-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--ill-gap);
}

.ill-overlay {
  position: relative;
  display: block;
  min-height: 200px;
  border-radius: var(--ill-radius);
  overflow: hidden;
  text-decoration: none;
  color: #fff;
  background-color: #1a1a1a;
  background-size: cover;
  background-position: center;
  box-shadow: var(--ill-shadow);
  transition: transform var(--ill-transition), box-shadow var(--ill-transition);
}

.ill-overlay:hover,
.ill-overlay:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.28);
  outline: none;
}

.ill-overlay-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.82) 0%,
    rgba(0, 0, 0, 0.45) 45%,
    rgba(0, 0, 0, 0.2) 100%
  );
  transition: background var(--ill-transition);
}

.ill-overlay:hover .ill-overlay-mask {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.88) 0%,
    rgba(0, 0, 0, 0.55) 50%,
    rgba(0, 0, 0, 0.3) 100%
  );
}

.ill-overlay-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.35rem 1.4rem;
  z-index: 1;
}

.ill-overlay-kicker {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ill-accent);
  margin-bottom: 0.4rem;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.ill-overlay-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.55rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.ill-overlay-cta {
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  opacity: 0.92;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: gap var(--ill-transition), opacity var(--ill-transition);
}

.ill-overlay:hover .ill-overlay-cta {
  gap: 0.45rem;
  opacity: 1;
}

/* ---------- Style variants ---------- */

/* Classic (dark default) */
.ill-style-classic .ill-card {
  background: var(--ill-bg);
}

.ill-style-classic .ill-overlay {
  /* already dark-friendly */
}

/* Minimal (light) */
.ill-style-minimal {
  --ill-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.ill-style-minimal .ill-card {
  border-width: 1px;
}

.ill-style-minimal .ill-card:hover {
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.1);
}

.ill-style-minimal .ill-overlay-mask {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.75) 0%,
    rgba(0, 0, 0, 0.35) 50%,
    rgba(0, 0, 0, 0.15) 100%
  );
}

/* ---------- Spacing between prev / next groups ---------- */
.ill-prev-group + .ill-head-next,
.ill-prev-group + .ill-next-group {
  margin-top: 1.75rem;
}

.ill-head-prev + .ill-horizontal,
.ill-head-next + .ill-horizontal {
  /* already handled by gap */
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .ill-wrapper {
    margin: 2rem 0 1.25rem;
  }

  .ill-horizontal {
    grid-template-columns: 1fr;
  }

  .ill-card {
    flex-direction: column;
    min-height: 0;
  }

  .ill-media {
    flex: none;
    max-width: none;
    width: 100%;
    height: 160px;
  }

  .ill-overlay {
    min-height: 180px;
  }

  .ill-overlay-title {
    font-size: 1.1rem;
  }

  .ill-title {
    font-size: 1rem;
  }
}

@media (min-width: 641px) and (max-width: 900px) {
  .ill-horizontal {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .ill-media {
    max-width: 150px;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .ill-card,
  .ill-overlay,
  .ill-thumb,
  .ill-cta,
  .ill-overlay-cta {
    transition: none !important;
  }

  .ill-card:hover,
  .ill-overlay:hover {
    transform: none;
  }

  .ill-card:hover .ill-thumb {
    transform: none;
  }
}