:root {
  --bg: #7284A8;
  --fg: #070707;
  --muted: #070707;
  --border: #5d6f93;
  --accent: #070707;
  --radius: 4px;
  --gap: 12px;
  --max-width: 960px;
  /* Futura è proprietario: su macOS/iOS esiste di sistema, altrove
     cade su caratteri geometrici simili. */
  --font: Futura, "Futura PT", "Century Gothic", "Avenir Next", Avenir,
    "Trebuchet MS", "Helvetica Neue", Helvetica, Arial, sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji";
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

.site-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px 20px;
  text-align: center;
}

.site-header h1 {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

@media (max-width: 640px) {
  .grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .site-header { padding: 24px 16px 12px; }
  .site-header h1 { font-size: 22px; }
}

.card {
  position: relative;
  display: block;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--border);
  text-decoration: none;
  color: inherit;
}

.card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}

.card:hover img,
.card:focus-visible img {
  transform: scale(1.04);
}

.card .overlay {
  position: absolute;
  inset: 0;
  padding: 12px;
  display: flex;
  align-items: flex-end;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.75) 0%,
    rgba(0,0,0,0.15) 45%,
    rgba(0,0,0,0) 70%
  );
  color: #fff;
  font-size: 13px;
  line-height: 1.3;
  opacity: 0;
  transition: opacity .25s ease;
}

.card:hover .overlay,
.card:focus-visible .overlay {
  opacity: 1;
}

.card .overlay span {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.loading, .error, .empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  padding: 40px 0;
  font-size: 14px;
}

.error { color: #c0392b; }

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}