:root {
  /* Theme tokens (silver sunset + brown accents) */
  --bg: #0b0f14;
  --bg-2: #14161d;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-2: rgba(255, 255, 255, 0.14);
  --text: #e9e9f0;
  --muted: #a6a6b8;
  --accent: #8b5e3d;      /* brown/burnt umber */
  --accent-2: #cbd7e0;     /* silver-tinge */
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
  --focus: #7bd7ff;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-stroke: rgba(255, 255, 255, 0.25);
  --radius: 14px;
  --gap: 1rem;
}

/* Layout base */
html, body { height: 100%; }
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color: var(--text);
  line-height: 1.5;
  min-height: 100dvh;

  /* Layered background: soft gradient + subtle noise/scanlines */
  background: 
    radial-gradient(circle at 10% 0%, rgba(255,255,255,0.08) 0, transparent 40%),
    linear-gradient(135deg, rgba(210,215,220,0.28) 0%, rgba(178,131,83,0.28) 60%, rgba(16,12,10,0.28) 100%),
    linear-gradient(#0b0f14, #0b0f14 60%, #111019 100%),
    repeating-linear-gradient(to bottom, rgba(255,255,255,0.04) 0 1px, transparent 1px 2px);
  background-blend-mode: overlay;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
a:hover { text-decoration: underline; }

/* Global containers & utilities */
.container { width: 100%; max-width: clamp(320px, 86vw, 1120px); margin-inline: auto; padding-inline: 1rem; }
.grid { display: grid; gap: var(--gap); }
.card { background: var(--surface); border: 1px solid rgba(255,255,255,0.25); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }

/* Glass panels (fallback-friendly) */
.glass {
  background: var(--surface);
  border: 1px solid var(--glass-stroke);
  border-radius: calc(var(--radius) + 2px);
  padding: 1rem;
  box-shadow: 0 6px 18px rgba(0,0,0,.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
@supports not (backdrop-filter: blur(12px)) {
  .glass { background: rgba(255,255,255,0.15); }
}

.image-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.28);
  box-shadow: 0 6px 20px rgba(0,0,0,.45);
  background: rgba(0,0,0,0.25);
  display: block;
}
.image-frame img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
  /* subtle glow tone tweak for cyber aesthetic */
  filter: saturate(1.05) contrast(1.05);
}

/* Header, main, article, aside, footer styling (semantic targets) */
header {
  padding: 1.25rem;
  text-align: center;
}
header h1 {
  margin: 0 0 .25rem;
  font-size: clamp(1.75rem, 3.2vw + 1rem, 3rem);
  letter-spacing: .4px;
}
header .meta {
  color: var(--muted);
  font-size: clamp(0.8rem, 1.2vw, 0.95rem);
}

/* Content region */
main { padding: 0 0.5rem 1rem; }
article { display: block; padding: 0.25rem; }

/* Typographic scale (responsive, fluid) */
h2 { font-size: clamp(1.25rem, 1.2vw + 1rem, 1.75rem); margin: 1rem 0 .25rem; color: var(--text); }
p { color: var(--muted); margin: 0.5rem 0 1rem; }
blockquote {
  margin: .5rem 0 1rem;
  padding-left: .75rem;
  border-left: 3px solid var(--accent);
  color: var(--text);
  opacity: .95;
}
ul { padding-left: 1.25rem; margin: .25rem 0 1rem; color: var(--text); }
li { margin: .25rem 0; }

/* Footer & ad sections (glass panels for emphasis) */
footer {
  padding: 1.25rem;
  display: grid;
  gap: .75rem;
  justify-items: center;
}
.product-ad, .sponsored-page {
  width: min(100%, 860px);
}
.product-ad a, .sponsored-page a {
  display: block;
  text-align: center;
  padding: .75rem 1rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.32);
  color: #fff;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease;
}
.product-ad a:hover, .sponsored-page a:hover { transform: translateY(-1px); background: rgba(255,255,255,0.18); text-decoration: none; }
footer p { color: var(--muted); text-align: center; font-size: .95rem; }

/* Buttons & CTAs (solid and outline variants) */
.btn, .cta {
  display: inline-block;
  padding: .55rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.35);
  background: linear-gradient(to bottom right, rgba(255,255,255,0.20), rgba(255,255,255,0.08));
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease;
}
.btn:hover, .cta:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active, .cta:active { transform: translateY(0); opacity: .95; }

/* Solid variant for emphasis */
.btn--solid {
  background: linear-gradient(135deg, rgba(140,100,64,1) 0%, rgba(76,46,28,1) 100%);
  border: 1px solid rgba(255,255,255,.45);
  color: #fff;
}
.btn--solid:hover { background: linear-gradient(135deg, rgba(150,112,78,1) 0%, rgba(86,46,28,1) 100%); }

/* Outline variant */
.btn--outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.75);
  color: var(--text);
}
.btn--outline:hover { background: rgba(255,255,255,.08); }

/* Link-like elements that resemble buttons/CTAs in content */
a.btn, a.cta { display: inline-flex; align-items: center; gap: .5rem; }

/* Accessibility: high-contrast focus for all focusable elements inside main content */
main :focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Form elements (if any) to match the theme */
input, select, textarea {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text);
  padding: .5rem .75rem;
  border-radius: 8px;
  outline: none;
}
input:focus-visible, select:focus-visible, textarea:focus-visible {
  border-color: #9bd0ff;
  box-shadow: 0 0 0 3px rgba(125, 205, 255, 0.25);
}

/* Helpers for layout responsiveness */
@media (min-width: 640px) {
  .container { padding-inline: 1.25rem; }
}
@media (min-width: 720px) {
  main { padding: 1rem 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Print readability */
@media print {
  body { background: #fff; color: #000; }
  a { text-decoration: underline; }
}
  
/* Light-mode adjustments for readability if user prefers light scheme */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f4f0;
    --bg-2: #ece7e0;
    --text: #1a1a1a;
    --muted: #5a5a5a;
    --surface: rgba(0,0,0,0.08);
    --surface-2: rgba(0,0,0,0.12);
    --glass: rgba(255,255,255,0.75);
    --glass-stroke: rgba(0,0,0,0.15);
  }
  body {
    background: 
      radial-gradient(circle at 10% 0%, rgba(0,0,0,0.05) 0, transparent 40%),
      linear-gradient(135deg, rgba(210,210,210,0.28) 0%, rgba(160,130,80,0.28) 60%, rgba(140,130,120,0.28) 100%),
      linear-gradient(#f7f5f0, #f7f5f0 60%, #f0eae2 100%);
    background-blend-mode: overlay;
  }
}