/* Reset and base */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: #eaffff;
  background-color: #0a0f14;
  background-image:
    linear-gradient(rgba(0,0,0,.25), rgba(0,0,0,.25)),
    repeating-linear-gradient(135deg, rgba(0, 210, 210, .20) 0 10px, rgba(0,0,0,0) 10px 20px);
  background-size: auto;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

/* Hero layout (mobile-first) */
main { display: grid; place-items: center; padding: 6vmin 4vmin; }

/* Frosted glass image frame (hero) */
.image-frame {
  width: min(88vw, 680px);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(0, 255, 255, .35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 10px 40px rgba(0,0,0,.6);
}
.image-frame img { display: block; width: 100%; height: auto; }

/* Footer with featured product (glassy) */
footer {
  text-align: center;
  padding: 1.5rem 1rem;
}
.product-ad {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1rem;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(0,255,255,.25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.product-ad h3 { margin: 0; font-size: 1rem; color: #bafffb; }

/* CTA styling (prominent buttons) */
a.btn, button.btn, .cta {
  display: inline-block;
  padding: .65rem 1.15rem;
  border-radius: 999px;
  color: #012f2c;
  background: #66fff0;
  text-decoration: none;
  font-weight: 700;
  transition: transform .15s ease, background .2s;
  box-shadow: 0 0 12px rgba(0,255,255,.6);
}
a.btn:hover, button.btn:hover, .cta:hover { transform: translateY(-1px); background: #4af0e7; }

/* Accessibility: clearly visible focus */
:focus-visible {
  outline: 2px solid #00e5ff;
  outline-offset: 2px;
  border-radius: 6px;
}

/* Inline product link style inside ad */
.product-ad a { text-decoration: none; }
.product-ad a p {
  margin: 0;
  padding: .25rem .75rem;
  border-radius: 999px;
  color: #00393a;
  background: #6af0ff;
  font-weight: 700;
  display: inline-block;
  line-height: 1;
  box-shadow: 0 0 8px rgba(0,255,255,.6);
}

/* Responsive tweaks */
@media (min-width: 768px) {
  main { padding: 8vmin 6vmin; }
  .image-frame { border-radius: 20px; }
}
@media (min-width: 1024px) {
  main { padding: 6vmin 8vmin; }
  .product-ad { flex-direction: row; align-items: center; gap: 1rem; }
  .product-ad h3 { font-size: 1.05rem; }
}