:root{
  --bg:#ffffff;
  --text:#111111;
  --muted:#5a5a5a;
  --border: rgba(0,0,0,0.12);
  --radius: 14px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: var(--bg);
  color: var(--text);
}

/* simple top bar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand h1{
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.controls{
  width: min(520px, 55vw);
}

#q{
  width: 100%;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  outline: none;
}
#q::placeholder{ color: rgba(0,0,0,0.45); }

main{ padding: 16px; }

/* masonry via CSS columns */
.masonry{
  column-count: 4;
  column-gap: 14px;
}
@media (max-width: 1200px){ .masonry{ column-count: 3; } }
@media (max-width: 800px){ .masonry{ column-count: 2; } }
@media (max-width: 520px){
  .masonry{ column-count: 1; }
  .controls{ width: 100%; }
  .topbar{ flex-direction: column; align-items: stretch; }
}

/* tile */
.card{
  break-inside: avoid;
  margin: 0 0 14px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform 120ms ease-out, box-shadow 120ms ease-out;
}

.card:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.10);
}

.card img{
  width: 100%;
  height: auto;
  display: block;
}