/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI";
  color: #eafff7;
  background-color: #021018;
  /* turquoise striped background (mobile-first) */
  background-image:
    repeating-linear-gradient(135deg,
      rgba(0, 255, 210, 0.25) 0 14px,
      rgba(0, 0, 0, 0) 14px 28px);
  background-size: 48px 48px;
  min-height: 100vh;
}

/* Layout */
main {
  display: grid;
  place-items: center;
  padding: 2rem;
  min-height: calc(100vh - 140px);
}

.image-frame {
  background: rgba(5, 12, 18, 0.72); /* frosted glass base */
  border: 1px solid rgba(57, 255, 210, 0.6);
  border-radius: 14px;
  padding: 14px;
  max-width: 680px;
  width: 100%;
  box-shadow: 0 8px 28px rgba(0,0,0,0.45);
  backdrop-filter: saturate(1.15) blur(6px);
  -webkit-backdrop-filter: saturate(1.15) blur(6px);
}

.image-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid rgba(60, 255, 185, 0.7);
  box-shadow: inset 0 0 8px rgba(0,0,0,0.4);
}

/* Footer / CTA area */
footer {
  padding: 14px 16px;
  display: grid;
  justify-items: center;
  gap: 12px;
  text-align: center;
}

.product-ad {
  background: rgba(0, 0, 0, 0.32);
  border: 1px solid rgba(0, 255, 140, 0.65);
  border-radius: 12px;
  padding: 12px 14px;
  width: min(92%, 520px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.product-ad h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: #39ff14; /* neon green accent */
  letter-spacing: .3px;
}

.product-ad a {
  text-decoration: none;
  color: #eafff7;
  display: inline-block;
  padding: 10px 14px;
  border-radius: 8px;
  background: linear-gradient(#0b1e13, #0a2316);
  border: 1px solid rgba(57, 255, 210, 0.8);
  box-shadow: 0 0 6px rgba(57, 255, 210, 0.6);
  transition: transform .2s ease, box-shadow .2s ease;
}
.product-ad a:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 12px rgba(57, 255, 210, 0.95);
}
.product-ad a:focus-visible {
  outline: 2px solid #39ff14;
  outline-offset: 2px;
}

p {
  color: #b8f3e0;
  font-size: 0.92rem;
  margin: 0;
}

/* Accessibility: focus styles on interactive elements inside the page */
a:focus-visible {
  outline: 2px solid #39ff14;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Responsive tweaks (mobile-first) */
@media (min-width: 768px) {
  main { min-height: 70vh; padding: 3rem; }
  .image-frame { padding: 18px; }
  .product-ad { width: 520px; }
}
@media (min-width: 1024px) {
  image-frame { padding: 22px; }
  .image-frame { border-radius: 18px; padding: 20px; }
}