/* Reset & base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Theme & layout variables */
:root {
  --cyan: #00e5ff;
  --bg: #021018;
  --fg: #eaffff;
  --glass: rgba(255, 255, 255, 0.12);
  --card: rgba(0, 0, 0, 0.25);
  --radius: 14px;
}

html, body { height: 100%; }

/* Cyan circuit-board background + hacker aesthetic */
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: var(--fg);
  background-color: var(--bg);
  background-image:
    linear-gradient(#00e5ff22 1px, transparent 1px),
    linear-gradient(90deg, #00e5ff22 1px, transparent 1px),
    radial-gradient(circle at 15% 15%, rgba(0,255,255,.18), transparent 40px);
  background-size: 40px 40px, 40px 40px, 120px 120px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Header / hero (clear, prominent) */
header {
  padding: 4rem 1rem;
  text-align: center;
  background: rgba(8, 18, 26, 0.6);
  border-bottom: 1px solid rgba(0, 255, 255, 0.25);
  backdrop-filter: blur(6px);
}

header h1 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--fg);
  margin: 0 auto 0.75rem;
  max-width: 800px;
  text-shadow: 0 0 12px rgba(0, 255, 255, 0.6);
}
@media (min-width: 768px) {
  header { padding: 5rem 1rem; }
  header h1 { font-size: 2.4rem; }
}

/* Main content spacing */
main { padding: 1rem; }

/* Frosted glass card around the image frame (hero focus) */
.image-frame {
  width: min(100%, 720px);
  margin: 0 auto;
  border-radius: var(--radius);
  padding: 1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-frame img {
  width: 100%;
  height: auto;
  border-radius: 10px;
}

/* Footer with CTA */
footer {
  padding: 2rem 1rem;
  text-align: center;
  color: #d7fbff;
}

/* Product ad block + prominent cyan CTA */
.product-ad {
  display: inline-block;
  margin: 0.5rem auto;
  padding: 0;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(0, 255, 255, 0.4);
}

.product-ad h3 {
  font-size: 1.05rem;
  margin: 0.25rem 0 0.5rem;
  color: var(--fg);
}

.product-ad a { text-decoration: none; display: inline-block; }

.product-ad a > p {
  margin: 0;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  font-weight: 700;
  color: var(--fg);
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.85), rgba(0, 180, 255, 0.95));
  text-shadow: 0 0 6px rgba(0, 255, 255, 0.9);
  box-shadow: 0 6px 14px rgba(0, 255, 255, 0.5);
}

.product-ad a:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; border-radius: 999px; }

/* Focus accessibility for links/buttons */
a:focus-visible, button:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; }

/* Layout tweaks for larger screens */
@media (min-width: 800px) {
  main { padding: 2rem 1.5rem; }
  .image-frame { padding: 1.25rem; }
}