* { box-sizing: border-box; margin: 0; padding: 0; }

:root{
  --bg: #0a0f14;
  --turq: #2ae9e6;
  --turq-dark: #0bd1c5;
  --violet: #7c3aed;
  --violet-dark: #5b2aa0;
  --glass: rgba(255,255,255,.08);
  --glass-border: rgba(255,255,255,.22);
  --text: #e8fbff;
  --muted: #b7e3ff;
  --shadow: rgba(0,0,0,.45);
  --focus: 3px solid #00f0ff;
}

html, body { height: 100%; }
html { font-size: 16px; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto;
  color: var(--text);
  background: #05070b;
  overflow-x: hidden;
  position: relative;
  background-color: #05070b;
}

/* turquoise waves background layer */
body:before {
  content: "";
  position: fixed;
  left: -5%;
  right: -5%;
  bottom: -20%;
  height: 60vh;
  background:
    radial-gradient(circle at 20% 60%, rgba(0, 255, 230, .25) 0 40%, transparent 41%),
    radial-gradient(circle at 70% 60%, rgba(128, 0, 255, .25) 0 40%, transparent 41%),
    linear-gradient(to bottom, rgba(0,0,0,.0), rgba(0,0,0,.35) 60%);
  background-blend-mode: screen;
  filter: saturate(1.05);
  mix-blend-mode: screen;
  animation: drift 40s linear infinite;
  pointer-events: none;
  z-index: 0;
}
@keyframes drift {
  0% { transform: translateX(0); }
  50% { transform: translateX(-20px); }
  100% { transform: translateX(0); }
}

main {
  position: relative;
  z-index: 1;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
}

/* frosted glass card framing the image */
.image-frame {
  width: min(92%, 1000px);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 1.25rem;
  padding: 1rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
  overflow: hidden;
  transition: transform .25s ease;
}
.image-frame:hover { transform: translateY(-2px); }

.image-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: .9rem;
  image-rendering: crisp-edges;
  filter: saturate(1.05);
}

/* footer with frosted glass product ad */
footer {
  padding: 2rem 1rem;
  text-align: center;
  color: #d4f0ff;
  position: relative;
  z-index: 1;
}

.product-ad {
  display: inline-block;
  background: rgba(255, 255, 255, .08);
  padding: .75rem 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin-bottom: .75rem;
}

.product-ad h3 {
  font-size: .92rem;
  font-weight: 700;
  margin: 0 0 .25rem;
  letter-spacing: .2px;
  color: #eaffff;
}
.product-ad a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  background: linear-gradient(135deg, #00f3e0, #7a5aff);
  color: #001018;
  font-weight: 800;
  border: 0;
  box-shadow: inset 0 0 0 rgba(0,0,0,0);
  transition: transform .2s ease;
}
.product-ad a:hover { transform: translateY(-1px); }
.product-ad a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.6);
}
.product-ad a p { margin: 0; color: #fff; font-weight: 800; }

/* accessible focus for links and interactive elements outside of the ad as well */
a:focus-visible {
  outline: 3px solid #00f0ff;
  outline-offset: 2px;
  border-radius: 6px;
}

/* responsive adjustments: mobile-first default is small screens */
@media (min-width: 768px) {
  main { padding: 6rem 1.25rem; min-height: 70vh; }
  .image-frame { padding: 1.25rem; border-radius: 1.5rem; }
  .product-ad { margin-top: 0.75rem; }
}
@media (min-width: 1024px) {
  main { padding: 8rem 2rem; }
  .image-frame { border-radius: 1.75rem; padding: 1.5rem; }
  .product-ad h3 { font-size: 1rem; }
} 

/* subtle neon glow for cyberpunk vibe on text elements (kept lightweight for readability) */
h1, h2, h3, .glow {
  text-shadow: 0 0 6px rgba(0, 255, 255, .25);
}
```