/* ==========================================================================
   Project tile (shared)
   ========================================================================== */

.tile {
  position: relative;
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius-image);
}

.tile__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.tile:hover .tile__image {
  transform: scale(1.04);
}

.tile__label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
  font-family: var(--font-heading);
  font-size: 1.625rem;
  font-weight: 400;
  text-transform: uppercase;
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tile:hover .tile__label,
.tile:focus-visible .tile__label {
  opacity: 1;
}

/* ==========================================================================
   Selected Projects grid (14 tiles, no big section gaps)
   ========================================================================== */

.project-grid {
  display: grid;
  grid-template-columns: repeat(var(--project-columns), 1fr);
  gap: var(--project-gap);
}

/* ==========================================================================
   Secondary tile grids (Virtual Tours / Digital Engagement) — 3 across
   ========================================================================== */

.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--project-gap);
}

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

@media (max-width: 600px) {
  .tile-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Footer / contact section
   ========================================================================== */

.footer {
  position: relative;
  color: var(--color-text-light);
  background-color: var(--color-bg-dark);
  background-size: cover;
  background-position: center;
  text-align: center;
  padding-bottom: 24px;
}

.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.55);
}

.footer .container {
  position: relative;
  z-index: 1;
}

.footer__container {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.footer__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.footer h2 {
  font-size: 4.6875rem; /* 75px */
  font-weight: 500;
  margin: 0 0 30px;
  letter-spacing: 0;
}

@media (max-width: 768px) {
  .footer h2 {
    font-size: 2.75rem;
  }
}

@media (max-width: 480px) {
  .footer.section--full {
    padding-top: calc(var(--header-height) + 32px);
  }
}

.footer__columns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__legal {
  padding-bottom: 8px;
  font-size: 1.1rem;
  opacity: 0.5;
}

.footer__column-title {
  font-size: 0.875rem; /* 14px */
  font-weight: 500;
  font-family: var(--font-body);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin: 30px 0 20px;
}

.footer__column p,
.footer__column a {
  font-size: 1.125rem; /* 18px */
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  transition: background var(--transition-fast);
}

.footer__social a:hover {
  background: var(--color-accent);
}

.footer__social svg {
  width: 16px;
  height: 16px;
  fill: #fff;
}

/* ==========================================================================
   Back to top
   ========================================================================== */

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 0;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1), 0 2px 6px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast), bottom var(--transition-medium);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top--raised {
  bottom: 60px;
}

.back-to-top svg {
  width: 22px;
  height: 22px;
  color: var(--color-text);
}