:root{
  --bg-dark: #000;
  --bg-dark2: #0b0b0f;
  --silver: #cbd5e1;
  --silver-dark: #aab4c0;
  --accent: #7df9ff;
  --glass: rgba(255,255,255,.08);
  --glass-border: rgba(255,255,255,.18);
  --shadow: 0 8px 28px rgba(0,0,0,.6);
}

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

html, body { height: 100%; min-height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: #e6eaf3;
  background: 
    radial-gradient(circle at 20% 0%, rgba(0,255,255,.08), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(100,100,120,.08), transparent 40%),
    linear-gradient(#000 0%, #0b0b0f 60%, #050507 100%);
  background-attachment: fixed;
  line-height: 1.45;
}

main {
  display: grid;
  place-items: center;
  padding: 4vmin 2rem;
  min-height: calc(100vh - 140px);
}

.image-frame {
  width: min(92vw, 980px);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  padding: 1rem;
  background: rgba(12,12,12,.55);
  border: 1px solid rgba(140,160,180,.25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 20px 60px rgba(0,0,0,.65);
  overflow: hidden;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.25);
  display: block;
}

footer {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  align-items: stretch;
  background: rgba(0,0,0,.55);
  border-top: 1px solid rgba(255,255,255,.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #dbe6ef;
}

.product-ad {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .75rem;
  border-radius: 12px;
  background: rgba(0,0,0,.45);
  border: 1px solid rgba(180,190,210,.4);
}

.product-ad h3 {
  font-size: 1rem;
  color: #e8fbff;
  margin: 0;
  white-space: nowrap;
}

.product-ad a {
  display: inline-block;
  padding: .6rem 1rem;
  border-radius: 999px;
  background: rgba(0,0,0,.65);
  color: #e1f6ff;
  text-decoration: none;
  border: 1px solid rgba(180,210,230,.5);
  transition: transform .2s ease, box-shadow .2s ease;
}
.product-ad a:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 14px rgba(0, 229, 255, .9);
}
.product-ad a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

footer p {
  font-size: .85rem;
  margin: 0;
  opacity: .85;
  text-align: left;
}

@media (min-width: 720px) {
  footer {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
  }
  .product-ad { width: 60%; }
  footer p { text-align: right; width: 40%; }
}