/* ── PAGE HERO ── */
.page-hero--portfolio {
  background-image:
    linear-gradient(110deg, rgba(13,18,25,.88) 0%, rgba(13,18,25,.52) 65%, rgba(19,126,168,.18) 100%),
    url('../images/obras/AG-Natural-Gas-3.jpg');
  background-size: cover;
  background-position: 0 30%;
}

/* ── CLIENTS LOGOS SECTION ── */
.clients-logos-section { background: var(--bg); padding: 96px 0; }
.clients-logos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 52px;
}
.mt-2{
    margin-top: 4%;
}
.client-logo-cell {
  background: var(--white);
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 24px;
  transition: background .25s;
  position: relative;
  overflow: hidden;
}
.client-logo-cell::after {
  content: '';
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--red));
  transition: width .35s;
}
.client-logo-cell:hover { background: var(--bg-2); }
.client-logo-cell:hover::after { width: 60%; }
.client-logo-name {
  font-family: 'Archivo', sans-serif;
  font-weight: 800;
  font-size: clamp(15px, 2vw, 20px);
  color: var(--muted);
  letter-spacing: -.01em;
  text-align: center;
  transition: color .25s;
  line-height: 1.2;
}
.client-logo-cell:hover .client-logo-name { color: var(--blue); }

/* ── GALLERY SECTION ── */
.portfolio-gallery { background: var(--bg-2); padding: 96px 0; }
.gallery-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 32px 0 40px;
}
.filter-btn {
  background: var(--white);
  border: 1.5px solid var(--line);
  color: var(--muted);
  font-family: 'Archivo Narrow', sans-serif;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 8px 18px;
  border-radius: 100px;
  cursor: pointer;
  transition: all .25s;
}
.filter-btn:hover,
.filter-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

/* Masonry-style grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.portfolio-item {
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  background: var(--ink);
  cursor: pointer;
  display: block;
}
.portfolio-item img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  transition: transform .55s, opacity .35s;
  min-height: 180px;
}
.portfolio-item:hover img { transform: scale(1.06); opacity: .75; }

/* Tall items */
.portfolio-item--tall { grid-row: span 2; }
.portfolio-item--tall img { min-height: 372px; }

/* Overlay */
.portfolio-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(transparent 35%, rgba(13,18,25,.82));
  opacity: 0; transition: opacity .35s;
  display: flex; flex-direction: column;
  justify-content: flex-end;
  padding: 24px 20px;
}
.portfolio-item:hover .portfolio-overlay { opacity: 1; }
.portfolio-overlay-tag {
  font-family: 'Archivo Narrow', sans-serif;
  font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  font-weight: 700; color: var(--blue);
  margin-bottom: 6px;
}
.portfolio-overlay-title {
  font-family: 'Archivo', sans-serif;
  font-weight: 700; font-size: 15px;
  color: #fff; line-height: 1.2; margin-bottom: 4px;
}
.portfolio-overlay-sub {
  font-size: 12px; color: rgba(255,255,255,.55);
}
.portfolio-overlay-icon {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #fff;
  backdrop-filter: blur(4px);
}

/* Category tag on each item */
.portfolio-cat {
  position: absolute; top: 14px; left: 14px;
  font-family: 'Archivo Narrow', sans-serif;
  font-size: 10px; letter-spacing: .1em; text-transform: uppercase;
  font-weight: 700; color: #fff;
  background: rgba(13,18,25,.55);
  backdrop-filter: blur(6px);
  padding: 4px 10px; border-radius: 3px;
  border: 1px solid rgba(255,255,255,.15);
}

/* ── CTA FINAL ── */
.portfolio-cta { background: var(--blue); padding: 96px 0; position: relative; overflow: hidden; }
.portfolio-cta::before {
  content: '→';
  position: absolute; right: -20px; top: 50%; transform: translateY(-50%);
  font-family: 'Archivo', sans-serif; font-weight: 900;
  font-size: clamp(160px,22vw,320px);
  color: rgba(255,255,255,.05); line-height: 1;
  pointer-events: none; user-select: none;
}
.portfolio-cta-inner {
  max-width: 1480px; margin: 0 auto; padding: 0 var(--px);
  display: flex; flex-direction: column; gap: 32px;
  position: relative; z-index: 2;
  align-items: flex-start;
}
.portfolio-cta h2 {
  font-family: 'Archivo', sans-serif; font-weight: 800;
  font-size: clamp(28px,4.5vw,52px); line-height: 1.06;
  letter-spacing: -.03em; color: #fff; max-width: 640px;
}
.portfolio-cta p {
  font-size: 17px; color: rgba(255,255,255,.65);
  line-height: 1.7; max-width: 520px;
}
.portfolio-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Responsive */
@media (min-width: 480px) {
  .clients-logos-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 640px) {
  .clients-logos-grid { grid-template-columns: repeat(4, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(3, 1fr); }
  .portfolio-item img { min-height: 200px; }
  .portfolio-item--tall img { min-height: 412px; }
}
@media (min-width: 900px) {
  .clients-logos-grid { grid-template-columns: repeat(4, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(4, 1fr); }
  .portfolio-cta-inner { flex-direction: row; justify-content: space-between; align-items: center; }
  .portfolio-cta h2 { max-width: 540px; }
  .portfolio-cta p { display: none; } /* in wide layout heading is enough */
}