:root {
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --maxw: 1200px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--accent-blue);
  color: var(--cream-white);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.container {
  width: min(92%, var(--maxw));
  margin-inline: auto;
}

/* Hero */
.hero {
  position: relative;
  padding: clamp(3rem, 6vw, 6rem) 0;
  text-align: center;
  background: url("/imgs/gallery/hero.jpg") center/cover no-repeat fixed;
  color: var(--cream-white);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}
.hero > .container {
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  margin: 0 0 0.5rem;
}
.hero p {
  color: var(--warm-grey);
  margin: 0 auto;
  max-width: 60ch;
}
@media (max-width: 768px) {
  .hero {
    background-attachment: scroll;
  }
}

/* Filters */
.filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin: 1rem auto 1.5rem;
}
.filter-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--cream-white);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.filter-btn[aria-pressed="true"],
.filter-btn:hover {
  background: var(--primary-green);
  box-shadow: 0 0 10px var(--golden-yellow);
  transform: translateY(-1px);
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}
.card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--accent-blue);
  border: 1px solid var(--accent-blue-dark);
  box-shadow: var(--shadow);
}
.card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}
.card:hover img {
  transform: scale(1.03);
}
.card .caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.65));
  padding: 0.6rem 0.7rem;
  font-size: 0.95rem;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.lightbox.is-open {
  display: flex;
}
.lb-img {
  max-width: min(94vw, 1400px);
  max-height: 86vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}
.lb-caption {
  color: #ddd;
  margin-top: 0.6rem;
  text-align: center;
}
.lb-close,
.lb-prev,
.lb-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  border: 0;
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
}
.lb-close {
  top: 24px;
  right: 24px;
  transform: none;
}
.lb-prev {
  left: 24px;
}
.lb-next {
  right: 24px;
}