/* Base tokens */
:root {
  --bg: #0a0a0a;
  --bg-2: #141212;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-2: rgba(255, 255, 255, 0.14);
  --border: rgba(255, 255, 255, 0.28);
  --text: #f6faff;
  --muted: #a5b4c3;
  --accent: #4de3ff;
  --accent-2: #ffd166;
  --shadow: 0 6px 18px rgba(0,0,0,.28);
  --radius: 12px;
  --focus: 2px solid rgba(77, 227, 255, 0.9);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
html { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial, "Noto Sans", sans-serif; color-scheme: dark; }
body {
  margin: 0;
  color: var(--text);
  background-color: var(--bg);
  /* Layered background: espresso gradient + subtle noise/scanlines */
  background-image:
    linear-gradient(135deg, rgba(12,12,12,.95) 0%, rgba(20,20,20,.95) 60%, rgba(12,12,12,.95) 100%),
    radial-gradient(circle at 20% -10%, rgba(255,255,255,.04), transparent 40%),
    repeating-linear-gradient(to bottom, rgba(255,255,255,.04) 0 1px, transparent 1px 2px);
  background-size: cover, auto, auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layered background guard for prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Sectioning: layout primitives */
.container {
  width: 100%;
  max-width: clamp(320px, 92vw, 1100px);
  margin-inline: auto;
  padding: 0 1rem;
}
.grid {
  display: grid;
  gap: 1rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
@supports not (backdrop-filter: blur(8px)) {
  .card { background: rgba(255,255,255,.12); }
}
.image-frame {
  width: min(90vw, 720px);
  aspect-ratio: 16 / 9;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.28);
  box-shadow: 0 12px 28px rgba(0,0,0,.4);
  background: #111;
}
.image-frame img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  filter: saturate(1.05);
}
.header, header, nav, main, article, footer, aside {
  /* structural selectors; keep defaults minimal for clean baseline */
}
header {
  padding: 1.75rem 1rem 0.75rem;
  text-align: center;
}
header h1 {
  font-size: clamp(1.4rem, 3.2vw, 2.6rem);
  line-height: 1.08;
  margin: 0.25rem 0 0.5rem;
  color: var(--text);
}
header .meta {
  color: var(--muted);
  font-size: clamp(0.75rem, 1.8vw, 0.95rem);
}
nav {
  margin-top: 0.5rem;
}
nav a {
  display: inline-block;
  padding: .5rem .75rem;
  border-radius: 8px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.25);
  color: var(--text);
  text-decoration: none;
  transition: transform .2s ease, background .2s ease;
}
nav a:hover { background: rgba(255,255,255,.15); text-decoration: underline; transform: translateY(-1px); }

/* Main content */
main { padding: 1rem 0 2rem; }
article { position: relative; z-index: 0; }

/* Typography for content */
.content { padding: 0; }
article h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin: .75rem 0 .5rem; color: var(--text); }
article h2 { font-size: clamp(1.1rem, 2.6vw, 1.6rem); margin: .9rem 0 .4rem; color: var(--text); }
article h3 { font-size: 1.15rem; margin: .75rem 0; color: var(--text); }
article p { color: #eef4fb; line-height: 1.6; margin: .4rem 0 1rem; }
article ul, article ol { padding-left: 1.25rem; margin: .4rem 0 1rem; color: #e7f0fa; }
article li { margin: .25rem 0; }
blockquote {
  margin: .5rem 0 1rem;
  padding: .5rem 1rem;
  border-left: 3px solid var(--accent);
  background: rgba(0,0,0,.15);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; color: var(--accent-2); }

/* Content helpers */
.tag { display:inline-block; padding:.25em .6em; border-radius:999px; font-size:.75rem;
  background: rgba(77,227,255,.25); color:#eaffff; border:1px solid rgba(104,255,255,.6);
}
ul, li { margin: 0; padding: 0; }

/* Footer and product-ad styling */
footer {
  padding: 1rem 0 2rem;
}
.product-ad, .sponsored-page {
  padding: .75rem;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.25);
  text-align: center;
}
.product-ad a, .sponsored-page a { display: block; color: var(--text); text-decoration: none; padding: .25rem; }
footer p { text-align: center; color: var(--muted); margin: .5rem 0 0; }

/* Utility controls: grid helpers for responsive layout */
@media (min-width: 720px) {
  main { padding: 1.25rem 0; }
}
@media (min-width: 860px) {
  .grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  .grid { transition: none; }
  nav a { transition: none; }
}

/* Button patterns (future-ready) */
.btn, button, .cta {
  display: inline-block;
  padding: .65rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.35);
  background: rgba(77,227,255,.18);
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease;
}
.btn:hover, button:hover, .cta:hover { transform: translateY(-1px); background: rgba(77,227,255,.28); text-decoration: none; }
.btn:focus-visible, button:focus-visible, .cta:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(77,227,255,.8);
  transform: translateY(0);
}
.btn.outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.6);
}
@media (prefers-reduced-motion: reduce) {
  .btn, button, .cta { transition: none; }
}

/* Print styles for readability */
@media print {
  body { background: white; color: black; }
  a { color: black; text-decoration: underline; }
  .card { background: white; border: 1px solid #ccc; box-shadow: none; }
}