/* Beige grid paper backdrop with turquoise hacker vibe, frosted glass, mobile-first */
:root{
  --paper: #f0e3cc;
  --turq: #2bd4c8;
  --turq-d: #1aa29a;
  --text: #111315;
  --card: rgba(255,255,255,0.18);
  --card-border: rgba(255,255,255,0.45);
}

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

html, body{ height: 100%; }
html, body { margin: 0; padding: 0; }

body{
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Helvetica Neue";
  color: var(--text);
  background-color: var(--paper);
  /* beige grid paper: turquoise grid lines */
  background-image:
    linear-gradient(to right, rgba(43,212,208,0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43,212,208,0.42) 1px, transparent 1px);
  background-size: 40px 40px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Frosted glass surfaces */
.frosted{ 
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.45);
  backdrop-filter: blur(8px) saturate(1.15);
  -webkit-backdrop-filter: blur(8px) saturate(1.15);
  border-radius: 16px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.15);
}

/* Page layout */
main{
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

.image-frame{
  width: min(92vw, 720px);
  padding: 1rem;
  border-radius: 18px;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.45);
  backdrop-filter: blur(8px) saturate(1.15);
  -webkit-backdrop-filter: blur(8px) saturate(1.15);
  box-shadow: 0 12px 28px rgba(0,0,0,0.15);
  overflow: hidden;
}

.image-frame img{
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  object-fit: cover;
  /* small vibrance for hacker vibe */
  filter: saturate(1.05);
}

/* Footer with product ad */
footer{
  padding: 1.75rem 1rem;
  text-align: center;
  color: #1b1f24;
  background: rgba(255,255,255,0.06);
  border-top: 1px solid rgba(0,0,0,0.04);
  margin-top: 1.25rem;
}

.product-ad{
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.22);
  border: 1px solid rgba(43,212,208,0.6);
  transition: transform 0.2s ease;
}
.product-ad:hover{ transform: translateY(-2px); }
.product-ad:focus-within{ outline: 3px solid rgba(43,212,208,0.9); outline-offset: 2px; }

.product-ad h3{
  margin: 0;
  font-size: 0.95rem;
  color: var(--turq);
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}
.product-ad a{ text-decoration: none; color: inherit; }

.product-ad a p{
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  border: 1px solid rgba(43,212,208,0.75);
  background: rgba(43,212,208,0.25);
  color: #041a1a;
  font-weight: 600;
}
.product-ad a:focus-visible p{ outline: 2px solid rgba(43,212,208,0.9); outline-offset: 2px; }

p{ margin: 0.25rem 0 0; }

/* Focus styles for accessibility on all focusable elements */
a:focus-visible, button:focus-visible, [tabindex]:focus-visible{
  outline: 3px solid var(--turq);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Responsive tweaks (mobile-first) */
@media (min-width: 640px){
  .image-frame{ padding: 1.25rem; }
  .product-ad h3{ font-size: 1rem; }
}
@media (min-width: 980px){
  main{ padding: 3rem 1rem; }
  .image-frame{ max-width: 860px; }
}