/* Reset and base */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
html { color-scheme: dark; }
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  color: #d8faff;
  background-color: #04151c;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(0, 255, 230, 0.15) 0 30%, transparent 30%),
    radial-gradient(circle at 85% 5%, rgba(0, 255, 230, 0.12) 0 28%, transparent 28%),
    repeating-linear-gradient(45deg, rgba(0, 255, 255, 0.04) 0 6px, rgba(0,0,0,0) 6px 12px),
    linear-gradient(#04131a, #041a21 40%, #021b22);
  background-attachment: fixed;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
main { display: grid; place-items: center; padding: 2rem 1rem; min-height: calc(100vh - 120px); }

/* Frosted glass card for image (hero) */
.image-frame {
  width: min(92vw, 860px);
  padding: 14px;
  border-radius: 20px;
  background: rgba(12, 60, 65, 0.40);
  border: 1px solid rgba(0, 255, 255, 0.65);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}

.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.25);
  filter: saturate(1.05) hue-rotate(-6deg);
}

/* Footer with CTA */
footer {
  padding: 1.75rem 1rem;
  display: grid;
  justify-items: center;
  gap: .75rem;
  color: #bffcff;
  background: rgba(3, 18, 22, 0.28);
  border-top: 1px solid rgba(0, 255, 255, 0.25);
}

.product-ad {
  text-align: center;
  padding: .9rem 1rem;
  border-radius: 12px;
  background: rgba(7, 50, 60, 0.42);
  border: 1px solid rgba(0, 255, 255, 0.6);
  width: min(420px, 92%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.product-ad h3 {
  margin: 0 0 .4rem;
  font-size: .95rem;
  color: #a4f6ff;
}
.product-ad a {
  display: inline-block;
  padding: .5rem .9rem;
  border-radius: 8px;
  text-decoration: none;
  color: #eaffff;
  background: rgba(0, 180, 190, 0.25);
  border: 1px solid rgba(0, 255, 255, 0.6);
  transition: transform .2s ease, background .2s ease;
}
.product-ad a:hover { transform: translateY(-1px); background: rgba(0, 180, 190, 0.4); }
.product-ad a p { margin: 0; }

/* Footer small text */
footer p { margin: 0; font-size: .85rem; }

/* Focus styles for accessibility */
a:focus-visible, button:focus-visible {
  outline: 3px solid #00ffe0;
  outline-offset: 2px;
  border-radius: 6px;
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) { outline: none; }

/* Responsive */
@media (min-width: 768px) {
  main { min-height: calc(100vh - 120px); padding: 4rem 2rem; }
  .image-frame { width: min(760px, 68vw); padding: 18px; border-radius: 22px; }
  .product-ad { font-size: 1.02rem; }
}
@media (min-width: 1024px) {
  body { font-size: 16px; }
  main { padding: 6rem 3rem; }
  .image-frame { padding: 20px; border-radius: 26px; }
}