:root {
  --bg: #0f1115;
  --fg: #e5e7eb;
  --muted: #9aa3b2;
  --card: #171923;
  --accent: #60a5fa;
  --radius: 16px;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
}
header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(8px);
  background: linear-gradient(180deg, rgba(15,17,21,0.9), rgba(15,17,21,0.6));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.wrap { max-width: 1200px; margin: 0 auto; padding: 0; }
h1 { font-size: clamp(20px, 2.4vw, 28px); margin: 0; font-weight: 700; }
.sub { color: var(--muted); font-size: 14px; }

/* Viewer area */
#viewerCard {
  position: relative; /* für Overlay */
  margin: 16px auto; background: var(--card); border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  overflow: hidden; border: 1px solid rgba(255,255,255,0.06);
}
#viewer {
  width: 100%; height: min(70vh, 700px);
  background: #0b0d12;
}
.viewerBar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px 12px; border-top: 1px solid rgba(255,255,255,0.06);
}
.title { font-weight: 600; }
.controls { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  background: #0e131c; color: var(--fg); border: 1px solid rgba(255,255,255,0.08);
  padding: 8px 10px; border-radius: 12px; cursor: pointer; font-weight: 600;
}
.btn:hover { border-color: rgba(255,255,255,0.2); }

/* Loading Overlay */
.loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,0.25); transition: opacity .2s; }
.loading.hidden { opacity: 0; visibility: hidden; }
.spinner { width: 36px; height: 36px; border: 3px solid rgba(255,255,255,0.25); border-top-color: #fff; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Gallery grid */
.grid {
  display: grid; gap: 12px; margin: 24px 0 60px;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}
.card {
  background: var(--card); border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius); overflow: hidden; cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: rgba(255,255,255,0.16); box-shadow: 0 10px 24px rgba(0,0,0,0.35); }
.thumbWrap { aspect-ratio: 16/9; background: #0b0d12; overflow: hidden; }
.thumbWrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cardBody { padding: 10px 12px; display: flex; justify-content: space-between; align-items: center; }
.label { font-weight: 600; }
.meta { font-size: 12px; color: var(--muted); }

/* Fullscreen modal for immersive viewing on phones */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.8);
  display: none; z-index: 100; align-items: center; justify-content: center; padding: 0;
}
.modal.open { display: flex; }
.modalInner {
  position: relative; width: 100%; height: 100%; background: #0b0d12;
}
#modalViewer { width: 100%; height: 100%; }
.modalClose {
  position: absolute; top: 10px; left: 10px; z-index: 101;
  background: rgba(15,17,21,0.85); border: 1px solid rgba(255,255,255,0.16);
  color: var(--fg); padding: 8px 12px; border-radius: 999px; cursor: pointer; font-weight: 700;
}

@media (max-width: 640px) {
  #viewer { height: 48vh; }
}