/* Reset and base */
*,
*::before,
*::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }

/* Theme and grid paper background (magenta grid, indigo hacker vibe) */
:root {
  --bg-dark: #0b0d14;
  --indigo: #4f46e5;
  --indigo-dark: #2a2d60;
  --text: #e8eaff;
  --muted: #cbd5e1;
  --glass: rgba(14, 12, 40, 0.65);
  --glass-border: rgba(110, 120, 210, 0.55);
  --grid: rgba(255, 0, 170, 0.25);
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: var(--text);
  line-height: 1.5;
  background-color: var(--bg-dark);
  /* magenta grid paper: subtle overlay + magenta grid lines */
  background-image:
    linear-gradient(rgba(0,0,0,.35), rgba(0,0,0,.35)),
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 24px);
  background-attachment: fixed;
  background-size: auto;
  min-height: 100vh;
}

/* Layout structure */
header, main, footer { width: min(1100px, 92%); margin: 0 auto; }

/* Frosted glass panels ( hacker / cyberpunk vibe ) */
header {
  margin: 1rem auto;
  padding: 1.75rem 1.25rem;
  border-radius: 14px;
  background: rgba(12, 12, 30, 0.66);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 8px 28px rgba(0,0,0,.45);
}
header h1 {
  margin: 0 0 .25rem;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.15;
  color: #eaf0ff;
  text-shadow: 0 1px 0 rgba(0,0,0,.25);
}
main { padding: 0 0 2rem; }

/* Image frame (hero visual) */
.image-frame {
  display: grid;
  place-items: center;
  padding: 0.75rem;
  margin: 0.75rem auto 1.25rem;
  border-radius: 16px;
  background: rgba(10, 8, 30, 0.55);
  border: 1px solid rgba(120, 120, 210, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
}
.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid rgba(180, 180, 255, 0.6);
  max-width: 100%;
}

/* Footer with call-to-action (CTA) */
footer { padding: 0 0 2rem; }
.product-ad {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  background: rgba(10, 8, 30, 0.55);
  border: 1px solid rgba(120, 120, 210, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.product-ad h3 { margin: 0; font-size: 1rem; }
.product-ad a { text-decoration: none; color: inherit; }

/* CTA styling inside anchor: button-like pill (accessible) */
.product-ad a p {
  margin: 0;
  padding: .55rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(80,0,160,.95), rgba(40,0,90,.95));
  color: #fff;
  border: 1px solid rgba(200,200,255,.6);
  display: inline-block;
  font-size: 0.95rem;
}

/* Footer small text */
footer p {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
  opacity: 0.9;
}

/* Focus visibility for accessibility */
:focus-visible {
  outline: 3px solid #9b5cff;
  outline-offset: 2px;
  border-radius: 6px;
}
a:focus-visible { outline: 3px solid #9b5cff; outline-offset: 2px; }

/* Responsive tweaks (mobile-first by default) */
@media (min-width: 600px) {
  header { padding: 2rem 1.75rem; }
  .image-frame { margin: 0.75rem auto 1.75rem; }
}
@media (min-width: 900px) {
  header { padding: 2.25rem 2.5rem; }
  header h1 { font-size: 2.4rem; }
}
@media (min-width: 1200px) {
  main { display: grid; justify-items: center; }
  .image-frame { width: 100%; max-width: 980px; }
  .product-ad { width: 100%; }
}