/* Reset and base for a light, accessible, mobile-first theme */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  color: #fff;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, "Helvetica Neue", Arial;
  background-color: #0a0a0a;
  /* Gold carbon fiber vibe: layered gradients to mimic texture */
  background-image:
    linear-gradient(135deg, rgba(212,173,52,0.15) 25%, rgba(0,0,0,0) 25%),
    linear-gradient(225deg, rgba(212,173,52,0.15) 25%, rgba(0,0,0,0) 25%),
    repeating-linear-gradient(45deg, rgba(0,0,0,.25) 0 6px, rgba(212,173,52,.15) 6px 8px, rgba(0,0,0,.25) 8px 14px);
  background-size: 40px 40px, 40px 40px, 100px 100px;
  background-position: 0 0, 20px 20px, 0 0;
  color-scheme: dark;
}
main {
  padding: 2rem 1rem;
  display: grid;
  place-items: center;
}
.image-frame {
  width: min(92vw, 720px);
  padding: 1rem;
  border-radius: 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
}
.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}
footer {
  margin-top: 2rem;
  padding: 1rem;
  text-align: center;
  color: #e9e9e9;
  background: linear-gradient(to top, rgba(0,0,0,.4), rgba(0,0,0,.0));
}
.product-ad {
  display: inline-block;
  padding: .75rem 1rem;
  border-radius: 999px;
  background: rgba(20, 20, 20, 0.6);
  border: 1px solid rgba(255,255,255,.25);
  margin-bottom: .75rem;
  text-align: left;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.15);
}
.product-ad h3 {
  font-size: 1rem;
  margin: 0 0 .25rem 0;
  color: #fff;
  text-shadow: 0 0 6px rgba(212, 175, 55, 0.9);
}
.product-ad a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .8rem 1.2rem;
  border-radius: 8px;
  text-decoration: none;
  color: #0b0b0b;
  background: linear-gradient(135deg, #ffd84d, #f0c84e 60%, #e2a600);
  font-weight: 700;
  letter-spacing: .2px;
  box-shadow: 0 6px 16px rgba(212,175,55,.6);
}
.product-ad a:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 2px;
}
.product-ad a:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}
.product-ad p {
  margin: 0;
  padding: 0;
  color: #1b1b1b;
  font-weight: 700;
}
p { line-height: 1.4; }

/* Focus ring for general links for accessibility */
a:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 2px;
  border-radius: 6px;
}

/* Responsive tweaks: small to medium screens first, scale up nicely */
@media (min-width: 600px) {
  main { padding: 3rem 2rem; }
  .image-frame { padding: 1.25rem; }
  .product-ad { transform: translateY(-2px); }
}
@media (min-width: 900px) {
  .image-frame { width: 60ch; }
  footer { padding: 2rem; }
  .product-ad { display: inline-flex; align-items: center; gap: 1rem; padding: .85rem 1.25rem; }
}