/* ============================================================
   LUDIA WEBSITE — PORTFOLIO.CSS
   Styles specific to portfolio.html
   ============================================================ */

/* ============================================================
   1. PORTFOLIO HERO
   ============================================================ */
.portfolio-hero {
  position: relative;
  padding: calc(var(--nav-h) + 5rem) 0 4rem;
  overflow: hidden;
}

.portfolio-hero-inner {
  position: relative;
  z-index: 1;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--grey-text);
  margin-bottom: 2rem;
  transition: color 0.2s;
}
.back-link:hover { color: var(--green); }

/* ============================================================
   2. PORTFOLIO TABS (sticky)
   ============================================================ */
.portfolio-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 1.5rem var(--pad-x);
  margin-bottom: 2rem;
  width: 100%;
  position: sticky;
  top: var(--nav-h);
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}
.portfolio-tabs.tabs-scrolled {
  background: rgba(26, 0, 40, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(255,255,255,0.07);
}

.ptab {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.55rem 1.3rem;
  border-radius: 100px;
  border: 1.5px solid rgba(255,255,255,0.12);
  color: var(--grey-text);
  transition: var(--transition);
  letter-spacing: 0.02em;
}
.ptab:hover {
  border-color: rgba(255,255,255,0.35);
  color: var(--white);
}
.ptab.active {
  background: var(--green);
  color: var(--purple-dark);
  border-color: var(--green);
}

/* ============================================================
   3. PORTFOLIO CONTENT
   ============================================================ */
.portfolio-main {
  padding-bottom: 8rem;
  background: var(--purple-dark);
}

/* Category section */
.portfolio-cat {
  margin-bottom: 5rem;
  scroll-margin-top: calc(var(--nav-h) + 80px);
}

.portfolio-cat-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

.portfolio-cat-title {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.portfolio-cat-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 2rem;
  text-transform: uppercase;
  color: var(--white);
}

.portfolio-cat-count {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.1em;
}

.portfolio-cat-desc {
  font-size: 0.85rem;
  color: var(--grey-muted);
  max-width: 400px;
  text-align: right;
  line-height: 1.5;
}

/* Masonry-like grid */
.portfolio-cat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

/* Wide cards (first item of each category) */
.portfolio-card:first-child {
  grid-column: span 2;
}

/* Tall cards (second item) */
.portfolio-card:nth-child(2) {
  grid-row: span 2;
}

.portfolio-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.07);
  background: rgba(255,255,255,0.03);
  transition: var(--transition);
  position: relative;
  cursor: none;
}
.portfolio-card:hover {
  border-color: rgba(174,220,33,0.35);
  transform: translateY(-5px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  z-index: 2;
}

/* Image wrapper — overflow:hidden on parent card handles clipping */
.portfolio-card-img-wrap {
  overflow: hidden;
  width: 100%;
  min-height: 200px;
  border-radius: 0;
}
.portfolio-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.portfolio-card:hover .portfolio-card-img {
  transform: scale(1.06);
}

.portfolio-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,0,20,0.9) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
}
.portfolio-card:hover .portfolio-card-overlay {
  opacity: 1;
}

.pc-tag {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.3rem;
}

.pc-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.2rem;
}

.pc-duration {
  font-size: 0.75rem;
  color: var(--grey-text);
}

/* Always-visible label at bottom for non-hover state */
.portfolio-card-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 0.8rem 1rem;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.8);
  transition: opacity 0.3s;
}
.portfolio-card:hover .portfolio-card-label {
  opacity: 0;
}

/* ============================================================
   4. EMPTY STATE
   ============================================================ */
.portfolio-empty {
  text-align: center;
  padding: 5rem 2rem;
  color: var(--grey-muted);
}
.portfolio-empty h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--grey-text);
}

/* ============================================================
   5. RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .portfolio-cat-grid { grid-template-columns: repeat(3, 1fr); }
  .portfolio-cat-desc { display: none; }
}

@media (max-width: 768px) {
  .portfolio-cat-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-card:first-child { grid-column: span 2; }
  .portfolio-card:nth-child(2) { grid-row: span 1; }
  .portfolio-tabs { gap: 0.4rem; }
  .ptab { font-size: 0.78rem; padding: 0.45rem 1rem; }
}

@media (max-width: 480px) {
  .portfolio-cat-grid { grid-template-columns: 1fr; }
  .portfolio-card:first-child { grid-column: span 1; }
  .portfolio-cat-name { font-size: 1.5rem; }
}