/* ==========================================================================
   PROJECTS PAGE — styles/projects.css
   Hero · Filter Tabs · Gallery Grid · Cards
   ========================================================================== */

/* --------------------------------------------------------------------------
   PAGE HERO
   -------------------------------------------------------------------------- */
.projects-hero {
  padding-top: calc(var(--nav-height) + 4rem);
  padding-bottom: 3rem;
}

.projects-hero-orb {
  position: absolute;
  width: 600px;
  height: 400px;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(95, 45, 241, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.projects-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  margin: 0.5rem 0 1rem;
}

.projects-hero > p {
  font-size: 1.05rem;
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   FILTER SECTION
   -------------------------------------------------------------------------- */
.filter-section {
  padding: 0 0 2rem;
  position: sticky;
  top: var(--nav-height);
  z-index: 10;
  background: rgba(44, 48, 54, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(95, 45, 241, 0.1);
}

.filter-tabs {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  padding: 1rem 0;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-light-grey);
  background: transparent;
  border: 1px solid rgba(99, 108, 113, 0.25);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-tab:hover {
  color: var(--color-accent);
  border-color: rgba(100, 255, 218, 0.3);
}

.filter-tab.active {
  background: rgba(95, 45, 241, 0.15);
  border-color: var(--color-purple);
  color: var(--color-white);
}

.filter-count {
  background: rgba(95, 45, 241, 0.2);
  color: #987af0;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  min-width: 18px;
  text-align: center;
  line-height: 1.4;
}

.filter-tab.active .filter-count {
  background: rgba(95, 45, 241, 0.35);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   GALLERY GRID
   -------------------------------------------------------------------------- */
.projects-gallery {
  padding-top: 3rem;
  background: var(--background-primary);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* Card hidden during filter */
.gallery-card[hidden] {
  display: none;
}

/* Empty state */
.gallery-empty {
  text-align: center;
  padding: 4rem 2rem;
}

.gallery-empty p:not(.section-tag) {
  font-size: 1rem;
  color: var(--color-light-grey);
}

/* --------------------------------------------------------------------------
   GALLERY CARD
   -------------------------------------------------------------------------- */
.gallery-card {
  background: var(--background-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(95, 45, 241, 0.1);
  transition: transform var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.gallery-card:hover {
  transform: translateY(-6px);
  border-color: rgba(95, 45, 241, 0.3);
  box-shadow: var(--shadow-strong);
}

/* Featured cards get a subtle top accent line */
.gallery-card--featured {
  border-color: rgba(95, 45, 241, 0.18);
}

.gallery-card--featured::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

/* --------------------------------------------------------------------------
   CARD IMAGE AREA
   -------------------------------------------------------------------------- */
.gallery-card-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  flex-shrink: 0;
}

.gallery-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent) 18%, transparent),
    var(--background-secondary)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.18);
  letter-spacing: 0.04em;
  position: relative;
}

.gallery-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, var(--accent, #5F2DF1) 0%, transparent 65%);
  opacity: 0.1;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(28, 32, 38, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
  backdrop-filter: blur(4px);
}

.gallery-card:hover .gallery-overlay {
  opacity: 1;
}

.gallery-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
}

.gallery-link:hover {
  background: var(--color-accent);
  color: var(--background-primary);
}

.gallery-link--disabled {
  color: rgba(171, 178, 191, 0.5);
  border-color: rgba(171, 178, 191, 0.2);
  cursor: default;
  pointer-events: none;
}

/* "Case Study" badge */
.gallery-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--gradient-primary);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  z-index: 2;
}

/* --------------------------------------------------------------------------
   CARD BODY
   -------------------------------------------------------------------------- */
.gallery-card-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.gallery-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.8rem;
}

.gallery-card-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.gallery-card-body p {
  font-size: 0.875rem;
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1rem;
}

.gallery-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  text-decoration: none;
  transition: gap var(--transition-fast), color var(--transition-fast);
  align-self: flex-start;
  margin-top: auto;
}

.gallery-cta svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.gallery-cta:hover {
  color: var(--color-white);
  gap: 0.65rem;
}

.gallery-cta:hover svg {
  transform: translateX(3px);
}

.gallery-cta--muted {
  color: rgba(171, 178, 191, 0.4);
  cursor: default;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

/* --------------------------------------------------------------------------
   DATA-REVEAL (GSAP handles these)
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
}

/* --------------------------------------------------------------------------
   RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .filter-section {
    position: static;
  }

  .filter-tabs {
    gap: 0.4rem;
  }

  .filter-tab {
    padding: 0.45rem 0.9rem;
    font-size: 0.78rem;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .gallery-card-image {
    height: 180px;
  }

  .projects-hero > p br {
    display: none;
  }
}

@media (max-width: 480px) {
  .filter-tabs {
    gap: 0.35rem;
  }

  .filter-tab {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
  }

  .gallery-card-body {
    padding: 1.1rem;
  }
}