/* ═══════ PROJECTS — v3.0 ═══════ */

.portfolio-filters {
  background: var(--c-surface); border-bottom: 1px solid var(--c-border);
  padding: 1.3rem 0;
}
.portfolio-filters__inner { display: flex; gap: 0.6rem; flex-wrap: wrap; justify-content: center; }
.filter-btn {
  font-family: var(--font-display); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.55em 1.3em; border-radius: var(--r-full);
  border: 1px solid var(--c-border-2); color: var(--c-text-muted);
  transition: all var(--t-base);
}
.filter-btn:hover { border-color: var(--c-royal); color: var(--c-royal); }
.filter-btn.is-active {
  background: var(--grad-brand); color: #fff; border-color: transparent;
  box-shadow: 0 4px 16px rgba(33,84,222,0.3);
}

.portfolio-section { background: var(--c-bg); }
.portfolio-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6rem; }
.portfolio-item {
  position: relative; border-radius: var(--r-lg); overflow: hidden; cursor: pointer;
  background: var(--c-navy-800);
  aspect-ratio: 16/10;
  transition: opacity 0.45s ease, transform 0.45s var(--ease-out), box-shadow var(--t-base);
  box-shadow: var(--shadow-card);
}
.portfolio-item:hover { box-shadow: var(--shadow-lift); }
.portfolio-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.8s var(--ease-out), opacity 0.4s;
  opacity: 0.85;
}
.portfolio-item:hover img { transform: scale(1.05); opacity: 1; }
.portfolio-item__overlay {
  position: absolute; inset: 0; z-index: 2;
  background: linear-gradient(200deg, rgba(4,8,26,0.05) 30%, rgba(4,8,26,0.88) 100%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.8rem;
}
.portfolio-item__meta { display: flex; align-items: center; gap: 0.9rem; margin-bottom: 0.7rem; }
.portfolio-item__cat {
  font-family: var(--font-display); font-size: 0.62rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.4em 1em; border-radius: var(--r-full);
  background: rgba(33,84,222,0.35); color: #fff;
  border: 1px solid rgba(130,162,241,0.4);
  backdrop-filter: blur(6px);
}
.portfolio-item__year { font-size: 0.72rem; letter-spacing: 0.1em; color: rgba(214,227,246,0.7); }
.portfolio-item__title {
  color: #fff; font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem); line-height: 1.25; max-width: 30ch;
}
.portfolio-item__view {
  position: absolute; top: 1.4rem; right: 1.4rem; z-index: 2;
  font-family: var(--font-display); font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase; color: #fff;
  padding: 0.5em 1.1em; border-radius: var(--r-full);
  border: 1px solid rgba(255,255,255,0.35);
  opacity: 0; transform: translateY(-6px);
  transition: opacity var(--t-base), transform var(--t-base);
  backdrop-filter: blur(6px);
}
.portfolio-item:hover .portfolio-item__view { opacity: 1; transform: none; }

/* Modal */
.portfolio-modal {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(4, 8, 26, 0.85);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center; padding: 5vh 4vw;
  opacity: 0; visibility: hidden; transition: opacity 0.4s ease, visibility 0.4s;
}
.portfolio-modal.is-open { opacity: 1; visibility: visible; }
.portfolio-modal__card {
  width: min(880px, 100%); max-height: 90vh; overflow-y: auto;
  background: var(--c-surface); border-radius: var(--r-lg);
  transform: translateY(24px) scale(0.98); transition: transform 0.45s var(--ease-out);
  border: 1px solid rgba(130,162,241,0.25);
}
.portfolio-modal.is-open .portfolio-modal__card { transform: none; }
.portfolio-modal__img { width: 100%; aspect-ratio: 16/8; object-fit: cover; }
.portfolio-modal__body { padding: 2.2rem clamp(1.5rem, 4vw, 2.8rem) 2.8rem; }
.portfolio-modal__meta { display: flex; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.portfolio-modal__close {
  position: absolute; top: 1.4rem; right: 1.4rem; z-index: 3;
  width: 42px; height: 42px; border-radius: 50%;
  background: rgba(4,8,26,0.6); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; border: 1px solid rgba(255,255,255,0.25);
  transition: background var(--t-base), transform var(--t-base);
}
.portfolio-modal__close:hover { background: var(--c-royal); transform: rotate(90deg); }

@media (max-width: 820px) {
  .portfolio-grid { grid-template-columns: 1fr; }
}