/* =========================
   gallery page only
   ========================= */
body.page-gallery { background: #FAFAFA; }

.page-hero {
  padding: 140px 0 70px;
  background:
    linear-gradient(120deg, rgba(4,10,24,.92) 0%, rgba(4,10,24,.78) 45%, rgba(4,10,24,.55) 100%),
    url('../../images/hanhtrinhcuanhungkyniem-3.jpg') center/cover no-repeat fixed;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 100%, rgba(232,93,4,.3), transparent 60%);
  pointer-events: none;
}
.ph-tag {
  display: inline-block;
  background: rgba(255,183,3,.18);
  color: var(--gd);
  font-size: .72rem; font-weight: 700;
  letter-spacing: 3px; text-transform: uppercase;
  padding: 8px 20px;
  border-radius: 30px;
  margin-bottom: 18px;
  border: 1px solid rgba(255,183,3,.3);
  position: relative; z-index: 2;
}
.ph-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 18px;
  position: relative; z-index: 2;
  text-shadow: 0 4px 30px rgba(0,0,0,.6);
}
.ph-title em {
  font-style: normal;
  background: linear-gradient(125deg, #FF8C42, #FFB703, #E85D04, #FF8C42);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}
.ph-sub {
  font-size: 1rem;
  color: rgba(255,255,255,.85);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.85;
  position: relative; z-index: 2;
}
@media (max-width: 768px) {
  .page-hero { padding: 120px 0 50px; background-attachment: scroll; }
}

.stats-strip {
  display: flex;
  justify-content: center;
  gap: 50px;
  padding: 32px 0;
  background: #fff;
  border-bottom: 1px solid rgba(0,0,0,.05);
}
.ss-item { text-align: center; }
.ss-n {
  font-family: var(--font-serif);
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--or);
  line-height: 1;
}
.ss-l {
  font-size: .7rem;
  color: var(--tl);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 5px;
}
@media (max-width: 1100px) { .stats-strip { gap: 30px; } .ss-n { font-size: 1.6rem; } }
@media (max-width: 768px)  { .stats-strip { padding: 24px 0; flex-wrap: wrap; gap: 20px; } }

.filter-section {
  position: sticky;
  top: 62px;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  z-index: 100;
  padding: 18px 0;
  border-bottom: 1px solid rgba(0,0,0,.06);
  box-shadow: 0 4px 20px rgba(0,0,0,.04);
}
body.bar-on .filter-section { top: 104px; }
.filter-tabs { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }
.ftab {
  padding: 9px 20px;
  border-radius: 30px;
  border: 1.5px solid #E5E7EB;
  background: #fff;
  color: var(--tl);
  font-size: .82rem; font-weight: 600;
  cursor: pointer;
  transition: all .3s;
  font-family: var(--font-sans);
  display: flex; align-items: center;
  gap: 6px;
}
.ftab i { font-size: .72rem; }
.ftab.active,
.ftab:hover {
  background: var(--or);
  color: #fff;
  border-color: var(--or);
  box-shadow: 0 4px 14px rgba(232,93,4,.3);
  transform: translateY(-2px);
}
.ftab .count {
  background: rgba(255,255,255,.25);
  padding: 1px 8px;
  border-radius: 10px;
  font-size: .7rem;
  margin-left: 4px;
}
.ftab:not(.active) .count { background: rgba(0,0,0,.08); color: var(--tl); }

.gallery-main { padding: 50px 0 80px; }
.masonry { column-count: 4; column-gap: 14px; }
@media (max-width: 1100px) { .masonry { column-count: 3; } }
@media (max-width: 768px)  { .masonry { column-count: 2; column-gap: 10px; } }
@media (max-width: 480px)  { .masonry { column-count: 1; } }

.m-item {
  break-inside: avoid;
  margin-bottom: 14px;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  box-shadow: 0 3px 14px rgba(0,0,0,.08);
  transition: transform .35s, box-shadow .35s;
  background: #1B2A4A;
  animation: itemIn .5s ease both;
}
.m-item:hover { transform: translateY(-5px); box-shadow: 0 14px 36px rgba(0,0,0,.18); }
.m-item img { width: 100%; height: auto; display: block; transition: transform .6s; }
.m-item:hover img { transform: scale(1.06); }

.m-item-ov {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.78) 0%, rgba(0,0,0,.15) 45%, transparent 70%);
  opacity: 0;
  transition: opacity .35s;
  pointer-events: none;
}
.m-item:hover .m-item-ov { opacity: 1; }

.m-item-info {
  position: absolute;
  bottom: 14px; left: 16px; right: 16px;
  color: #fff;
  transform: translateY(10px);
  opacity: 0;
  transition: all .4s;
  z-index: 2;
}
.m-item:hover .m-item-info { transform: translateY(0); opacity: 1; }
.m-item-cat {
  font-size: .66rem; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--gd);
  margin-bottom: 4px;
}
.m-item-ttl { font-size: .9rem; font-weight: 700; line-height: 1.4; }
.m-item-zoom {
  position: absolute;
  top: 14px; right: 14px;
  width: 36px; height: 36px;
  background: rgba(255,255,255,.95);
  color: var(--nv);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .78rem;
  opacity: 0;
  transform: scale(.7);
  transition: all .3s;
  z-index: 3;
}
.m-item:hover .m-item-zoom { opacity: 1; transform: scale(1); }
.m-item.hidden { display: none; }

@keyframes itemIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}