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

:root {
  --violet: #7c3aed;
  --violet-dark: #4c1d95;
  --bg: #f7fbff;
  --card: rgba(255, 255, 255, 0.16);
  --border: rgba(180, 130, 255, 0.55);
  --text: #e9e6ff;
  --muted: #cbd5e1;
}

html, body { height: 100%; }

body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background: var(--bg);
  /* white grid paper background */
  background-image:
    linear-gradient(to right, rgba(0,0,0,.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,.08) 1px, transparent 1px);
  background-size: 40px 40px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: grid;
  gap: 1.25rem;
  padding: 2rem 1rem 0;
  align-items: start;
  justify-items: center;
  min-height: calc(100vh - 120px);
}

.image-frame {
  width: min(92vw, 1000px);
  margin: 2rem auto;
  padding: 1.25rem;
  border-radius: 20px;
  background: rgba(123, 63, 255, 0.15);
  border: 1px solid rgba(180, 130, 255, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
  display: grid;
  place-items: center;
}

.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
}

.product-ad {
  width: min(92vw, 980px);
  padding: 14px 18px;
  margin: 12px auto;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(180, 130, 255, 0.55);
  color: #f8f4ff;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.product-ad h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: #f8f3ff;
}

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

.product-ad a p {
  margin: 0;
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--violet), var(--violet-dark));
  color: #fff;
  font-weight: 700;
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 6px 18px rgba(124, 58, 237, 0.6);
}

.product-ad a p:hover { transform: translateY(-1px); }

footer p {
  text-align: center;
  color: #e2e0f9;
  font-size: 0.95rem;
  margin: 0;
  padding: 0.5rem 0;
}

a:focus-visible, button:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 2px;
  border-radius: 6px;
}

/* Responsive breakpoints (mobile-first) */
@media (min-width: 600px) {
  main { gap: 1.75rem; padding-top: 2rem; }
  .product-ad { grid-template-columns: auto 1fr; }
}
@media (min-width: 900px) {
  .image-frame { padding: 1.75rem; border-radius: 22px; }
  .product-ad { padding: 18px; }
  .product-ad h3 { font-size: 1.05rem; }
}