/* Global reset and base */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }

/* Teal metallic + hacker aesthetic variables */
:root {
  --bg-teal: #0bd9c4;
  --bg-teal-dark: #0a6c6a;
  --glass: rgba(255,255,255,.08);
  --glass-strong: rgba(255,255,255,.14);
  --text: #eaffff;
  --cta: #00ffd5;
}

/* Light reset: keep fonts readable, accessible contrast */
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  color: var(--text);
  background: linear-gradient(135deg, #021414 0%, #041414 60%, #061a1a 100%);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}
body::before {
  /* teal metallic sheen overlay */
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 10% 0%, rgba(0, 255, 212, .15), transparent 12%),
              radial-gradient(circle at 90% 20%, rgba(0, 255, 180, .12), transparent 14%);
  mix-blend-mode: screen;
  z-index: 0;
}

/* Layout container (mobile-first) */
main {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 180px);
  padding: 2rem 1rem;
}

/* Frosted glass frame for hero image */
.image-frame {
  width: min(92vw, 900px);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
  padding: 0.75rem;
  background: rgba(0,0,0,.38);
  border: 1px solid rgba(0, 255, 230, .65);
  backdrop-filter: blur(8px) saturate(1.15);
  -webkit-backdrop-filter: blur(8px) saturate(1.15);
  box-shadow: 0 12px 40px rgba(0,0,0,.6);
  overflow: hidden;
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 14px;
  display: block;
  filter: saturate(1.05) contrast(1.05);
  box-shadow: inset 0 0 20px rgba(0,0,0,.25);
}

/* Footer with a prominent CTA and copyright */
footer {
  padding: 1.5rem 1rem;
  text-align: center;
  color: #e6fafa;
  background: rgba(0,0,0,.55);
  border-top: 1px solid rgba(0, 255, 230, .5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.product-ad { display: inline-block; margin-bottom: .5rem; }
.product-ad h3 { font-size: .95rem; font-weight: 700; margin-bottom: .4rem; }
.product-ad a { text-decoration: none; display: inline-block; }
.product-ad a > p {
  margin: 0;
  padding: .55rem 1rem;
  border-radius: 8px;
  color: #041b1b;
  font-weight: 800;
  background: linear-gradient(#18f1d0, #0bb9a7);
  border: 1px solid rgba(0,0,0,.25);
  box-shadow: 0 3px 8px rgba(0,0,0,.35);
}
.product-ad a:focus-visible > p {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 255, 212, .7);
  border: 1px solid rgba(0, 255, 212, .9);
}
footer p { margin-top: .25rem; font-size: .9rem; color: #cbdede; }

/* Focus visibility for accessibility */
:focus-visible {
  outline: 3px solid var(--cta);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Responsive scaling: mobile-first with enhancements for larger viewports */
@media (min-width: 600px) {
  main { min-height: calc(100vh - 160px); padding: 3rem 2rem; }
  .image-frame { width: min(86vw, 860px); aspect-ratio: 16 / 9; }
}
@media (min-width: 1024px) {
  main { padding: 4rem 3rem; }
  .image-frame { width: min(80vw, 980px); }
}