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

:root {
  --bg-dark: #2b110d;
  --bg-mid:  #6b2b0f;
  --bg-sun:  #a65a15;
  --cyan:     #18eaff;
  --cyan-deep:#00cbd6;
  --glass: rgba(255, 255, 255, 0.08);
}

html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto;
  color: #eaffff;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 40%, var(--bg-sun) 100%);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  min-height: calc(100vh - 180px);
}

.image-frame {
  width: min(92vw, 860px);
  aspect-ratio: 16 / 9;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(0, 255, 255, 0.28);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  position: relative;
}
.image-frame::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 22px;
  border: 1px solid rgba(0, 255, 255, 0.6);
  box-shadow: 0 0 40px rgba(0, 255, 255, 0.5);
  pointer-events: none;
  z-index: 0;
}
.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05);
}

footer {
  padding: 14px 16px;
  color: #e0f8ff;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: rgba(10, 10, 12, 0.25);
  border-top: 1px solid rgba(0, 255, 255, 0.25);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.product-ad {
  width: min(92vw, 520px);
  padding: 14px 16px;
  text-align: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(0, 255, 255, 0.28);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.product-ad h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: #7dfaff;
  letter-spacing: .4px;
}
.product-ad a {
  display: inline-block;
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  font-weight: 700;
  color: #041e25;
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.9), rgba(0, 180, 210, 0.95));
  border: 1px solid rgba(0, 255, 255, 0.7);
}
.product-ad a:hover { transform: translateY(-1px); }
.product-ad a:focus-visible { outline: 2px solid #00f5ff; outline-offset: 2px; }

footer p {
  margin: 0;
  font-size: 0.95rem;
  color: #cfefff;
  opacity: 0.95;
}

@media (min-width: 600px) {
  footer {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 20px 28px;
  }
  .product-ad { text-align: left; }
  .product-ad h3 { font-size: 1.05rem; }
}

@media (min-width: 900px) {
  main { padding: 6rem 2rem; }
  .image-frame { border-radius: 22px; }
  .product-ad { width: min(720px, 68%); }
}