/* ============================================================
   pages/projects.css — Projects / Portfolio Page Styles
   ============================================================ */


/* ============================================================
   FILTER TABS
   Horizontal tabs to filter by category.
   Active state and JS behavior in js/pages/projects.js.
   ============================================================ */
.projects-filter {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin-bottom: var(--sp-12);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--sp-2);
}

.filter-btn {
  padding: var(--sp-3) var(--sp-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--ease-fast), border-color var(--ease-fast);
  margin-bottom: -1px; /* Overlap parent border */
}

.filter-btn:hover {
  color: var(--color-primary);
}

.filter-btn.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
  font-weight: 500;
}


/* ============================================================
   PROJECTS GRID
   3-column responsive grid.
   Cards are hidden/shown via JS filter.
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

/* Card hidden by filter */
.project-card.is-hidden {
  display: none;
}

/* Fade-in when card becomes visible via filter */
.project-card.is-showing {
  animation: cardReveal 0.3s ease forwards;
}

@keyframes cardReveal {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

/* Empty state if no results match filter */
.projects-empty {
  display: none;
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--sp-20) 0;
  color: var(--color-text-muted);
}

.projects-empty.is-visible {
  display: block;
}

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

@media (max-width: 560px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}