*,
*::before,
*::after { box-sizing: border-box; }

:root {
  --teal: #2ee6c7;
  --teal-dark: #12b9a7;
  --card: rgba(255,255,255,.16);
  --card-border: rgba(255,255,255,.28);
  --text: #eaffff;
}

html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  color: var(--text);
  line-height: 1.5;
  background-color: #ff0b87;
  /* magenta checkerboard background */
  background-image:
    linear-gradient(45deg, rgba(0,0,0,.15) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0,0,0,.15) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0,0,0,.15) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0,0,0,.15) 75%);
  background-size: 28px 28px;
  background-position: 0 0, 0 14px, 14px -14px, -14px 0;
  padding-bottom: 40px;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 1080px; margin: 0 auto; padding: 28px 16px; }

.image-frame {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 8px 28px rgba(0,0,0,.25);
  position: relative;
}
.image-frame img { display: block; width: 100%; height: auto; }

footer {
  padding: 22px 16px;
  margin-top: 28px;
  text-align: center;
  color: rgba(234,255,255,.95);
}

.product-ad {
  display: inline-block;
  width: 100%;
  max-width: 520px;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.28);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 6px 20px rgba(0,0,0,.25);
  margin: 6px auto 14px;
}
.product-ad h3 { margin: 0 0 6px; font-size: 1.05rem; color: #e8ffff; }
.product-ad p { margin: 0; }

.product-ad a {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0bd8bd 0%, #0aa79c 100%);
  color: #042626;
  font-weight: 700;
  text-decoration: none;
  transition: transform .15s ease;
}
.product-ad a:hover { transform: translateY(-1px); }
.product-ad a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

@media (min-width: 600px) {
  main { padding: 40px 20px; }
  .image-frame { border-radius: 24px; }
  .product-ad { margin-top: 12px; }
}

@media (min-width: 900px) {
  /* keep a clean vertical stack; centers on wide screens */
  main { display: block; }
  .image-frame { width: 80%; margin: 0 auto; }
  footer { padding-top: 8px; }
}