:root{
  --bg:#0f1720;
  --card:#0b1220;
  --accent:#6ee7b7;
  --muted:#9aa7b2;
  --glass: rgba(255,255,255,0.04);
  --radius:12px;
  --maxw:1200px;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color-scheme: dark;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg, #07101a 0%, #08121a 60%);
  color:#e6eef2;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:28px 18px;
}

/* Topbar */
.topbar{
  width:100%;
  max-width:var(--maxw);
  margin-bottom:18px;
  text-align:left;
}
.topbar h1{margin:0;font-size:1.4rem;letter-spacing:0.4px}
.subtitle{margin:6px 0 0;color:var(--muted);font-size:0.92rem}

/* Controls */
.controls{
  width:100%;
  max-width:var(--maxw);
  display:flex;
  gap:10px;
  margin:16px 0;
}
.controls input, .controls select{
  background:var(--glass);
  border:1px solid rgba(255,255,255,0.04);
  color:var(--muted);
  padding:10px 12px;
  border-radius:10px;
  outline:none;
  flex:1;
}
.controls select{width:180px;flex:0 0 auto;color:var(--muted)}

/* Gallery */
.gallery {
  display: flex;
  flex-wrap: wrap;        /* les cartes passent à la ligne */
  gap: 20px;              /* espace entre les cartes */
  justify-content: center; /* centre la galerie horizontalement */
}
@media (max-width:1000px){ .gallery{column-count:2} }
@media (max-width:640px){ .gallery{column-count:1} }

.card {
  flex: 0 0 250px;        /* largeur fixe des cartes */
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f8f8f8;
  padding: 10px;
  border-radius: 8px;
}
.card:focus{outline:2px solid rgba(110,231,183,0.12)}
.card:hover{ transform:translateY(-6px); box-shadow:0 18px 40px rgba(2,6,12,0.7) }

.card img{
  width:100%;
  height:auto;
  display:block;
  object-fit:cover;
  vertical-align:middle;
  filter:contrast(1.05) saturate(1.02);
  transition:filter .25s;
}
.card:hover img{ filter:contrast(1.08) saturate(1.08) brightness(1.02) }

.meta{
  padding:10px 12px 14px;
}
.meta h3{ margin:0; font-size:1rem; color:#e6f9ee }
.meta .desc{ margin:6px 0 0; font-size:0.87rem; color:var(--muted) }

/* Lightbox */
.lightbox{
  position:fixed;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  background:linear-gradient(180deg, rgba(1,6,11,0.6), rgba(1,6,11,0.85));
  z-index:2000;
  padding:30px;
}
.lightbox.show{ display:flex; }

.lb-content{
  max-width:1200px;
  width:100%;
  display:flex;
  gap:18px;
  align-items:flex-start;
}
.lb-content img{
  max-height:80vh;
  max-width:75%;
  width:auto;
  border-radius:10px;
  box-shadow:0 12px 40px rgba(0,0,0,0.6);
  transition: transform .18s;
}
.lb-info{
  max-width:360px;
  color:var(--muted);
}
.lb-info h3{ color:#fff; margin:0 0 6px }
.lb-info p{ margin:0 0 12px }
.download{
  display:inline-block;
  padding:8px 12px;
  background:linear-gradient(90deg,var(--accent),#4fd0b0);
  color:#002217;
  text-decoration:none;
  border-radius:8px;
  font-weight:600;
}

/* Nav & close */
.nav, .close{
  position:fixed;
  background:transparent;
  border:none;
  color:#d7eae2;
  font-size:30px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  padding:10px;
  z-index:2100;
}
.close{ top:22px; right:26px; font-size:22px }
.nav.prev{ left:18px; top:50%; transform:translateY(-50%); font-size:42px }
.nav.next{ right:18px; top:50%; transform:translateY(-50%); font-size:42px }

/* small screens: stack LB content */
@media (max-width:900px){
  .lb-content{flex-direction:column; align-items:center}
  .lb-content img{ max-width:92%; max-height:60vh }
  .lb-info{ max-width:92%; text-align:center }
}
.lb-content iframe {
  width: 75%;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
}
@media (max-width:900px){
  .lb-content iframe { width: 92%; }
}