/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }

/* Theme & helpers */
:root {
  --bg: #0a0a0a;
  --panel: rgba(255, 255, 255, 0.08);
  --line: rgba(255, 255, 255, 0.25);
  --text: #e9e9e9;
  --muted: #cbd5e1;
  --yellow: #ffd400;
  --yellow-deep: #e6bf00;
}
html { color-scheme: dark; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  color: var(--text);
  background-color: #040404;
  /* White diagonal lines background (mobile-first diagonal scanlines) */
  background-image: repeating-linear-gradient(135deg,
    rgba(255, 255, 255, 0.08) 0px,
    rgba(255, 255, 255, 0.08) 2px,
    transparent 2px,
    transparent 40px);
  background-attachment: fixed;
  background-position: 0 0;
}

/* Layout: mobile-first, centered hero */
main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  min-height: calc(100vh - 120px);
}
.image-frame {
  width: min(92vw, 720px);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}
.image-frame img {
  display: block;
  width: 100%;
  height: auto;
}

/* Footer / CTA area (prominent CTA via product ad) */
footer {
  padding: 1.75rem 1rem;
  text-align: center;
  color: var(--muted);
}
.product-ad {
  display: inline-block;
  padding: 0.5rem;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.25);
  margin-bottom: 0.5rem;
}
.product-ad h3 {
  font-size: 0.95rem;
  margin: 0 0 0.25rem;
  color: var(--yellow);
  text-shadow: 0 0 8px rgba(255, 212, 0, 0.8);
}
.product-ad a { text-decoration: none; display: inline-block; }
.product-ad a p {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 213, 0, 0.95), rgba(255, 214, 0, 0.75));
  color: #111;
  font-weight: 800;
  letter-spacing: .2px;
  border: 1px solid rgba(0, 0, 0, 0.15);
}
.product-ad a:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
  border-radius: 8px;
}
.product-ad a:hover { transform: translateY(-1px); filter: brightness(1.05); }

/* Focus accessibility for interactive elements (keyboard users) */
a:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Typographic micro-styles for cyberpunk vibe */
.product-ad h3 { text-transform: none; letter-spacing: .4px; }

/* Responsive: larger screens adjust proportions and space */
@media (min-width: 768px) {
  main { min-height: 70vh; padding: 3rem 2rem; }
  .image-frame { width: 860px; border-radius: 20px; }
  footer { padding-top: 2rem; }
}
@media (min-width: 1024px) {
  .image-frame { border-radius: 22px; box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7); }
  .product-ad h3 { font-size: 1rem; }
}