:root{
  --gap:8px;
  --bg:#0f0f10;
  --cell-bg:#151516;
  --muted:#9a9a9a;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;
  background:var(--bg);
  color:var(--muted);
  display:flex;
  align-items:stretch;
  justify-content:center;
  padding:12px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  /* keep content within one screen height on mobile */
  height:100vh;
  overflow:hidden;
}

/* Grid container fills available space and creates auto squares */
#grid{
  width:100%;
  /* keep within one column on very narrow screens but use grid for squares */
  display:grid;
  gap:var(--gap);
  grid-template-columns:repeat(auto-fit,minmax(84px,1fr));
  align-content:start;
  overflow:auto;
  padding:var(--gap);
  border-radius:8px;
  background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);
}

/* Each cell is a perfect square using aspect-ratio */
.cell{
  background:var(--cell-bg);
  border-radius:8px;
  display:block;
  position:relative;
  overflow:hidden;
  aspect-ratio:1 / 1;
  min-height:84px;
  display:flex;
  align-items:center;
  justify-content:center;
}

/* Media inside cells scale to fit without cropping */
.cell img,
.cell video{
  width:100%;
  height:100%;
  object-fit:contain;
  display:block;
}

/* Small translucent filename overlay */
.label{
  position:absolute;
  left:6px;
  right:6px;
  bottom:6px;
  background:linear-gradient(180deg,transparent,rgba(0,0,0,0.45));
  color:#fff;
  font-size:11px;
  padding:6px 8px;
  border-radius:6px;
  text-overflow:ellipsis;
  white-space:nowrap;
  overflow:hidden;
  display:block;
}

/* Loading / empty state */
.empty{
  color:var(--muted);
  padding:18px;
  text-align:center;
}

/* make click targets touch-friendly */
.cell a{display:block; width:100%; height:100%}