/* Reset & base */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
:root {
  --bg: #0a0f14;
  --text: #eaffff;
  --teal: #14b8a6;
  --teal-dark: #0a8a82;
  --glass: rgba(255,255,255,.08);
  --focus: #a7f3d0;
}
body {
  min-height: 100vh;
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background-color: var(--bg);
  position: relative;
  overflow-x: hidden;
  /* turquoise geometric shapes background */
  background-image:
    radial-gradient(circle at 15% 25%, rgba(20, 200, 180, .25) 0 120px, transparent 120px),
    radial-gradient(circle at 70% 60%, rgba(0, 255, 210, .22) 0 140px, transparent 140px),
    linear-gradient(135deg, rgba(0,0,0,.25), rgba(0,0,0,.15) 40%, transparent 40%),
    repeating-linear-gradient(45deg, rgba(0,255,210,.08) 0 8px, transparent 8px 16px);
  background-blend-mode: screen;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  /* subtle glow overlays for hacker/cyberpunk vibe */
  background-image:
    radial-gradient(circle at 60% 20%, rgba(0,255,210,.15) 0 30%, transparent 30%),
    radial-gradient(circle at 20% 70%, rgba(0,255,200,.12) 0 28%, transparent 28%);
  mix-blend-mode: overlay;
  filter: saturate(110%);
}
a { color: inherit; text-decoration: none; }

/* Layout */
main {
  width: 100%;
  display: grid;
  justify-items: center;
  padding: 2rem 1rem 0;
}
.image-frame {
  width: 92%;
  max-width: 720px;
  padding: 2.25rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 12px 40px rgba(0,0,0,.45);
}
.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

/* footer & product card (CTA) */
footer {
  width: 100%;
  padding: 1.5rem 1rem 2rem;
  display: grid;
  justify-items: center;
  gap: .75rem;
  color: #eaffff;
  background: rgba(2,6,23,.6);
  border-top: 1px solid rgba(0,255,255,.25);
}
.product-ad {
  width: min(92vw, 520px);
  padding: .75rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .75rem;
  align-items: center;
}
.product-ad h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.product-ad a { display: inline-block; }
.product-ad p {
  margin: 0;
  padding: .6rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #0bd5c9, #0a8a82);
  color: #fff;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,.5);
  text-align: center;
}

/* Focus accessibility for interactive elements (CTA) */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* Responsive tweaks (mobile-first) */
@media (min-width: 700px) {
  main { padding: 3rem 2rem; }
  .image-frame { padding: 3rem; }
}
@media (min-width: 1024px) {
  .image-frame { max-width: 900px; padding: 4rem; }
  .product-ad { grid-template-columns: auto 1fr; gap: 1rem; }
  .product-ad h3 { font-size: 1.15rem; }
}