.projects-section {
  max-width: var(--max);
  margin: auto;
  padding: 110px 24px;
}
.projects-heading {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 70px;
  align-items: end;
  margin-bottom: 38px;
}
.projects-heading h2 {
  font-size: clamp(2rem, 4vw, 3.55rem);
  line-height: 1.12;
  letter-spacing: -.04em;
  color: var(--navy-dark);
  margin: 0;
}
.projects-heading > p { color: var(--muted); font-size: 1.04rem; margin: 0; }
.project-filters { display: flex; gap: 9px; flex-wrap: wrap; margin-bottom: 28px; }
.project-filters button {
  border: 1px solid #bed0d8;
  background: #fff;
  color: var(--navy);
  border-radius: 999px;
  padding: 10px 17px;
  font: 700 .82rem Inter, Arial, sans-serif;
  cursor: pointer;
}
.project-filters button:hover,
.project-filters button.active { background: var(--navy); border-color: var(--navy); color: #fff; }
.project-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 245px;
  gap: 14px;
}
.project-card {
  position: relative;
  border: 0;
  padding: 0;
  background: #dfe9ed;
  overflow: hidden;
  cursor: pointer;
  text-align: left;
  border-radius: 5px;
}
.project-card.project-wide { grid-column: span 2; }
.project-card.project-tall { grid-row: span 2; }
.project-card[hidden] { display: none; }
.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .45s ease, filter .45s ease;
}
.project-card::after {
  content: "";
  position: absolute;
  inset: 35% 0 0;
  background: linear-gradient(transparent, rgba(1,25,40,.86));
  pointer-events: none;
}
.project-card span { position: absolute; z-index: 2; left: 20px; right: 20px; bottom: 17px; color: #fff; display: block; }
.project-card strong, .project-card small { display: block; }
.project-card strong { font-size: 1rem; line-height: 1.25; }
.project-card small { font-size: .73rem; color: #cfe3eb; margin-top: 4px; }
.project-card:hover img, .project-card:focus-visible img { transform: scale(1.045); filter: saturate(1.05); }
.project-card:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; }
.project-lightbox {
  width: min(1060px, 94vw);
  max-height: 92vh;
  border: 0;
  padding: 0;
  background: #061d2c;
  color: #fff;
  border-radius: 7px;
  box-shadow: 0 30px 90px rgba(0,0,0,.48);
  overflow: hidden;
}
.project-lightbox::backdrop { background: rgba(1,18,29,.88); }
.project-lightbox img { display: block; width: 100%; max-height: 82vh; object-fit: contain; background: #03131e; }
.project-lightbox p { margin: 0; padding: 14px 20px; font-weight: 700; }
.lightbox-close {
  position: absolute;
  z-index: 2;
  top: 12px;
  right: 12px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: rgba(3,38,64,.9);
  color: #fff;
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover { background: var(--teal); }
@media (max-width: 900px) {
  .projects-heading { grid-template-columns: 1fr; gap: 20px; }
  .project-grid { grid-template-columns: repeat(2,1fr); grid-auto-rows: 240px; }
  .project-card.project-wide { grid-column: span 2; }
  .project-card.project-tall { grid-row: span 1; }
  .site-header nav { max-height: calc(100vh - 74px); overflow: auto; }
}
@media (max-width: 580px) {
  .projects-section { padding: 78px 16px; }
  .project-filters { gap: 7px; }
  .project-filters button { padding: 9px 12px; font-size: .76rem; }
  .project-grid { grid-template-columns: 1fr; grid-auto-rows: 250px; }
  .project-card.project-wide { grid-column: span 1; }
  .project-card.project-tall { grid-row: span 1; }
  .project-card span { left: 17px; bottom: 15px; }
  .project-lightbox { width: 96vw; }
  .project-lightbox img { max-height: 76vh; }
}