*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* All colors derived from the logo blue hue (199°) */
  --logo-blue: #009fda;
  --bg:        #070f14;   /* near-black navy */
  --surface:   #0d1e28;   /* dark blue-tinted card surface */
  --border:    #1a3445;   /* muted blue border */
  --text:      #ddf0fa;   /* cool blue-white */
  --muted:     #5a8fa8;   /* desaturated mid-blue */
  --accent:    #009fda;   /* logo blue, used for highlights */
  --gap: 1.5rem;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

header {
  background: var(--logo-blue);
  text-align: center;
  border-bottom: none;
}

.site-logo {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin: 0 auto;
}

header::after {
  content: '';
  display: block;
  height: 2rem;
  background: linear-gradient(to bottom, var(--logo-blue), var(--bg));
}

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: calc(var(--gap) * 2) var(--gap);
}

.category {
  margin-top: calc(var(--gap) * 2.5);
}

.category-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 0.6rem;
  margin-bottom: var(--gap);
  border-bottom: 1px solid var(--border);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 30, 50, 0.7);
}

.card-image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #0a1820;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.card:hover .card-image img {
  transform: scale(1.04);
}

.card-body {
  padding: 1rem 1.1rem 1.2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.card-desc {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
  flex: 1;
}

.card-info {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.5rem;
  opacity: 0.7;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(0, 159, 218, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 159, 218, 0.3);
}

footer {
  text-align: center;
  padding: 2rem var(--gap);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Lightbox — CSS-only, no JS */
.lightbox-target {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 10, 20, 0.94);
  z-index: 100;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}

.lightbox-target:target {
  display: flex;
}

.lightbox-target img {
  max-width: 92vw;
  max-height: 88vh;
  border-radius: 6px;
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.8);
  cursor: default;
  user-select: none;
  -webkit-user-drag: none;
  transition: transform 0.05s ease;
}

.lightbox-close {
  position: fixed;
  top: 1rem;
  right: 1.4rem;
  font-size: 2rem;
  color: #fff;
  text-decoration: none;
  line-height: 1;
  opacity: 0.7;
}

.lightbox-close:hover {
  opacity: 1;
}


@media (max-width: 480px) {
  .gallery {
    grid-template-columns: 1fr;
  }
}