/* Section: Token Palette & Theme */
:root {
  --bg: #0b1020;
  --bg-2: #0a1a35;
  --text: #eaf2ff;
  --muted: #a9b7d9;
  --accent: #4169e1;      /* royal blue */
  --accent-2: #dc143c;    /* crimson */
  --glass: rgba(14, 28, 60, 0.22);
  --glass-border: rgba(255, 255, 255, 0.28);
  --shadow: 0 6px 20px rgba(0,0,0,.25);
  --radius: 14px;
  --focus-ring: 0 0 0 3px rgba(65,105,225,.6);
}

/* Section: Global & Layout (Mobile-first) */
html, body { height: 100%; }
* { box-sizing: border-box; }
html { font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial; }
body {
  margin: 0;
  color: var(--text);
  line-height: 1.5;
  background:
    linear-gradient(135deg, rgba(65,105,225,.14) 0, rgba(220,20,60,.14) 60%, rgba(65,105,225,.14) 100%),
    repeating-linear-gradient(to bottom, rgba(255,255,255,.03) 0 1px, rgba(0,0,0,.03) 1px 2px),
    linear-gradient(#0b1020 0%, #0b1020 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
}
img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: clamp(320px, 92vw, 1100px);
  margin-inline: auto;
  padding-inline: 1rem;
}

/* Section: Structural elements (non-visual) */
header, nav, main, article, footer, aside {
  display: block;
}
header { padding: 1rem 0.75rem; text-align: center; }
main { padding: 1rem 0; }
footer { padding: 1rem 0; }

/* Section: Background treatment for glassy surfaces (fallback provided) */
.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
@supports not ((backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px))) {
  .glass { background: rgba(14,28,60,0.80); backdrop-filter: none; -webkit-backdrop-filter: none; border-color: rgba(255,255,255,.40); }
}

/* Section: Typography & Hero */
header h1 {
  font-size: clamp(1.75rem, 3vw + 1rem, 2.75rem);
  line-height: 1.08;
  margin: 0.25rem 0 0.25rem;
  letter-spacing: .2px;
}
header nav { margin-top: .5rem; }
header nav a {
  color: var(--text);
  text-decoration: none;
  padding: .35rem .6rem;
  border-radius: 6px;
}
header nav a:hover, header nav a:focus-visible { text-decoration: underline; }

/* Section: Image frame */
.image-frame {
  aspect-ratio: 16 / 9;
  width: min(100%, 720px);
  margin: 1rem auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.28);
  box-shadow: 0 8px 22px rgba(0,0,0,.35);
  background: #111;
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.05);
  transform: translateZ(0); /* GPU hint */
}
main article { display: block; }

/* Section: Content helpers + utilities */
.content { padding: 0; }

/* Section: Buttons & links (CTA) */
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 3px solid rgba(65,105,225,.85); outline-offset: 2px; border-radius: 4px; }

.btn, .cta {
  display: inline-block;
  padding: .65rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.45);
  background: var(--accent);
  color: #fff;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  transition: transform .15s ease, background .15s ease;
}
.btn:hover, .cta:hover { background: color-mix(in oklab, var(--accent) 110%, white 0%); filter: brightness(1.03); }
.btn:active, .cta:active { transform: translateY(1px); }
.btn--outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent-2);
}
.btn--outline:hover { background: rgba(65,105,225,.08); color: var(--accent); }

/* Section: Lists & tags */
ul, li { margin: 0; padding: 0; list-style: none; }
li { margin: .25rem 0; }

/* Section: Cards & grids (utility) */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}
.card {
  background: rgba(10, 20, 40, 0.28);
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 12px;
  padding: .75rem;
  min-height: 60px;
}
.tag {
  display: inline-block;
  padding: .25rem .5rem;
  font-size: .75rem;
  border-radius: 999px;
  background: rgba(65,105,225,.25);
  color: #eaf2ff;
  border: 1px solid rgba(65,105,225,.55);
}

/* Section: Product area (specifically .product-ad) */
.product-ad {
  margin: .5rem auto;
  width: min(100%, 720px);
}
.product-ad a {
  display: block;
  padding: .75rem;
  text-align: center;
  text-decoration: none;
}
.product-ad p {
  margin: 0;
  font-weight: 600;
  color: #eaf2ff;
}
footer .sponsored-page { margin: .5rem auto; }

/* Section: Print readability (basic) */
@media print {
  body { background: white; color: #000; }
  a { text-decoration: underline; }
}

/* Section: Accessibility & motion preferences */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Section: Layout helpers (non-intrusive defaults) */
header, main, footer { width: 100%; }
@media (min-width: 720px) {
  main { padding: 1.25rem 0; }
}