/*========================================================
  Portfolio page — diselaraskan dengan tema blog/about/contact
  (memakai variabel warna & class yang sama dari style.css:
  --brand-dark, --brand-mid, --brand-light, --brand-accent)
=========================================================*/

/*========================================================
  Masthead
=========================================================*/
.portfolio-masthead{
  background: linear-gradient(180deg, rgba(0, 20, 46, 0.55) 0%, rgba(0, 20, 46, 0.85) 100%), url("../images/parallax.jpg") center center/cover no-repeat;
  padding: 70px 0 70px;
  color: #fff;
  position: relative;
}
.portfolio-masthead .container{
  max-width: 1200px;
  position: relative;
  z-index: 2;
}
.portfolio-masthead .eyebrow{
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 12.5px;
  color: var(--brand-accent);
  font-weight: 700;
  margin: 0 0 14px;
}
.portfolio-masthead h1{
  color: #fff;
  text-transform: none;
  letter-spacing: normal;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  margin: 0 0 14px;
}
.portfolio-masthead p{
  color: rgba(255,255,255,.78);
  font-size: 16px;
  line-height: 1.7;
  max-width: 620px;
  margin: 0;
}

/*========================================================
  Filter tabs
=========================================================*/
.portfolio-filter-wrap{
  background: #fff;
  border-bottom: 1px solid #eceef2;
  position: sticky;
  top: 0;
  z-index: 20;
}
.portfolio-filter{
  max-width: 1200px;
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
}
.portfolio-filter_tab{
  background: none;
  border: none;
  padding: 4px 0;
  font-size: 15px;
  font-weight: 600;
  color: #6b7280;
  cursor: pointer;
  position: relative;
  transition: color .2s ease;
  white-space: nowrap;
}
.portfolio-filter_tab::after{
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  background: var(--brand-light);
  transition: width .25s ease;
}
.portfolio-filter_tab:hover{
  color: var(--brand-dark);
}
.portfolio-filter_tab.is-active{
  color: var(--brand-light);
}
.portfolio-filter_tab.is-active::after{
  width: 100%;
}

/*========================================================
  Grid & card
=========================================================*/
.portfolio-wrap{
  background: #fff;
}
.portfolio-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 20px 40px;
}
.portfolio-card{
  background: #fff;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid #eceef2;
  box-shadow: 0 10px 30px -18px rgba(0,34,76,.18);
  transition: transform .35s cubic-bezier(.22,1,.36,1), box-shadow .35s ease;
  display: flex;
  flex-direction: column;
}
.portfolio-card:hover{
  transform: translateY(-6px);
  box-shadow: 0 22px 40px -16px rgba(0,34,76,.28);
}
.portfolio-card[hidden]{
  display: none;
}
.portfolio-card_thumb{
  display: block;
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-dark));
  overflow: hidden;
  border: none;
  padding: 0;
  cursor: zoom-in;
}
.portfolio-card_thumb img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s cubic-bezier(.22,1,.36,1);
}
.portfolio-card:hover .portfolio-card_thumb img{
  transform: scale(1.08);
}
.portfolio-card_body{
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.portfolio-card_tag{
  display: inline-block;
  align-self: flex-start;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--brand-light);
  background: rgba(0, 81, 181, .08);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 10px;
}
.portfolio-card_title{
  font-size: 18px;
  line-height: 1.4;
  margin: 0 0 8px;
  color: #1a2233;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 700;
}
.portfolio-card_desc{
  font-size: 14px;
  line-height: 1.65;
  color: #6b7280;
  margin: 0 0 14px;
  flex: 1;
}
.portfolio-card_link{
  font-size: 13.5px;
  font-weight: 700;
  color: var(--brand-accent);
  text-transform: uppercase;
  letter-spacing: .04em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease;
  align-self: flex-start;
}
.portfolio-card_link:hover{
  gap: 10px;
}

.portfolio-empty-filtered{
  text-align: center;
  color: #808289;
  padding: 30px 20px 60px;
  max-width: 1200px;
  margin: 0 auto;
}
.portfolio-empty-filtered[hidden]{
  display: none;
}

/*========================================================
  Lightbox (tampilan gambar penuh, vanilla JS — konsisten
  dengan pendekatan halaman lain yang tidak memuat jQuery)
=========================================================*/
.portfolio-lightbox{
  position: fixed;
  inset: 0;
  background: rgba(0, 12, 28, .92);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease;
}
.portfolio-lightbox.is-open{
  opacity: 1;
  visibility: visible;
}

/* Horizontal scroll track — geser/scroll ke samping untuk
   berpindah antar gambar portofolio (swipe di mobile, drag
   mouse / tombol panah di desktop). */
.portfolio-lightbox_track{
  display: flex;
  width: 100%;
  height: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  cursor: grab;
}
.portfolio-lightbox_track::-webkit-scrollbar{
  display: none;
}
.portfolio-lightbox_track.is-dragging{
  cursor: grabbing;
  scroll-snap-type: none;
}
.portfolio-lightbox_slide{
  flex: 0 0 100%;
  max-width: 100%;
  scroll-snap-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 40px 84px;
}
.portfolio-lightbox_slide img{
  max-width: 100%;
  max-height: 78vh;
  border-radius: 12px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.6);
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
}
.portfolio-lightbox_caption{
  color: #fff;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
}
.portfolio-lightbox_close{
  position: absolute;
  top: 24px;
  right: 24px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.2) 0%, rgba(255,255,255,.02) 45%, rgba(255,255,255,.05) 100%) no-repeat,
    rgba(255,255,255,.04);
  -webkit-backdrop-filter: blur(24px) saturate(200%) brightness(1.05);
  backdrop-filter: blur(24px) saturate(200%) brightness(1.05);
  border: 1px solid rgba(255,255,255,.22);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 20px -8px rgba(0,0,0,.45), inset 0 1.5px 0 rgba(255,255,255,.4), inset 0 -1px 0 rgba(0,0,0,.12);
  transition: background .25s ease, box-shadow .25s ease, transform .25s cubic-bezier(.22,1,.36,1);
}
.portfolio-lightbox_close:hover{
  background:
    linear-gradient(180deg, rgba(255,255,255,.26) 0%, rgba(255,255,255,.03) 45%, rgba(255,255,255,.07) 100%) no-repeat,
    rgba(255,255,255,.08);
  transform: scale(1.06);
}
.portfolio-lightbox_nav{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background:
    linear-gradient(180deg, rgba(255,255,255,.2) 0%, rgba(255,255,255,.02) 45%, rgba(255,255,255,.05) 100%) no-repeat,
    rgba(255,255,255,.04);
  -webkit-backdrop-filter: blur(24px) saturate(200%) brightness(1.05);
  backdrop-filter: blur(24px) saturate(200%) brightness(1.05);
  border: 1px solid rgba(255,255,255,.22);
  color: #fff;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 20px -8px rgba(0,0,0,.45), inset 0 1.5px 0 rgba(255,255,255,.4), inset 0 -1px 0 rgba(0,0,0,.12);
  transition: background .25s ease, box-shadow .25s ease, transform .25s cubic-bezier(.22,1,.36,1);
}
.portfolio-lightbox_nav:hover{
  background:
    linear-gradient(180deg, rgba(255,255,255,.26) 0%, rgba(255,255,255,.03) 45%, rgba(255,255,255,.07) 100%) no-repeat,
    rgba(255,255,255,.08);
  transform: translateY(-50%) scale(1.08);
}
.portfolio-lightbox_nav svg{
  pointer-events: none;
}
.portfolio-lightbox_nav--prev{ left: 20px; }
.portfolio-lightbox_nav--next{ right: 20px; }
.portfolio-lightbox_nav[hidden]{ display: none; }

@media (max-width: 640px){
  .portfolio-lightbox_slide{
    padding: 20px 16px;
  }
  .portfolio-lightbox_nav{
    display: none;
  }
}

@media (max-width: 767px){
  .portfolio-masthead{
    padding: 60px 0 50px;
  }
  .portfolio-filter{
    gap: 8px 20px;
    padding: 16px 20px;
    overflow-x: auto;
    flex-wrap: nowrap;
  }
}