:root {
  --bg: #0b001a;
  --grid-purple: rgba(150, 100, 200, 0.25);
  --teal: #2ee6cc;
  --teal-dark: #0fb29f;
  --fg: #eaffff;
  --glass: rgba(16, 8, 28, 0.7);
  --card-border: rgba(46, 230, 204, 0.6);
  --shadow: 0 6px 22px rgba(0,0,0,.45);
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  color: var(--fg);
  background-color: var(--bg);
  /* violet grid paper background */
  background-image:
    linear-gradient(var(--grid-purple) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-purple) 1px, transparent 1px);
  background-size: 28px 28px, 28px 28px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

.image-frame {
  width: min(92%, 900px);
  padding: 14px;
  border-radius: 16px;
  background: rgba(15, 6, 24, 0.68);
  border: 1px solid rgba(46, 230, 204, 0.55);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.image-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  outline: 0;
  border: 0;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--fg);
  background: rgba(8, 0, 20, 0.25);
  border-top: 1px solid rgba(120, 255, 230, 0.15);
}

.product-ad {
  display: inline-block;
  padding: 0.6rem 0.9rem;
  border-radius: 12px;
  background: rgba(6, 0, 40, 0.68);
  border: 1px solid var(--card-border);
  margin-bottom: 0.75rem;
  transition: transform .15s ease, background .3s ease;
  box-shadow: inset 0 0 0 rgba(0,0,0,.0);
}

.product-ad h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: #b5fff0;
}

.product-ad a { text-decoration: none; color: inherit; }

.product-ad a p {
  margin: 0;
  padding: .55rem 1rem;
  display: inline-block;
  border-radius: 999px;
  background: rgba(46, 230, 204, 0.15);
  border: 1px solid rgba(46, 230, 204, 0.65);
  color: #eaffff;
  font-weight: 700;
  transition: transform .15s ease, background .3s ease;
}

.product-ad a:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
  border-radius: 999px;
}

.product-ad a:hover p {
  transform: translateY(-1px);
  background: rgba(46, 230, 204, 0.28);
  box-shadow: 0 0 6px rgba(46,230,204,.5);
}

footer p {
  margin: 0.75rem 0 0;
  font-size: .875rem;
  opacity: .9;
}

/* Hover/focus for accessibility on the whole page links if present */
a:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

/* Responsive tweaks (mobile-first) */
@media (min-width: 600px) {
  .image-frame { padding: 18px; border-radius: 18px; }
  .product-ad h3 { font-size: 1.05rem; }
  footer { padding: 2.25rem 1rem; }
}

@media (min-width: 1024px) {
  body {
    background-size: 32px 32px, 32px 32px;
  }
  .image-frame { width: 860px; }
}