/* Base Theme */
:root {
  --bg: #02070e;
  --bg-2: #0b1a2b;
  --text: #eaf7ff;
  --muted: #a8d4ff;
  --accent: #0b4cff;      /* royal blue */
  --accent-2: #29e5ff;     /* sky/cyan blue */
  --glass: rgba(255, 255, 255, 0.12);
  --glass-2: rgba(255, 255, 255, 0.22);
  --border: rgba(255, 255, 255, 0.28);
  --shadow: 0 8px 26px rgba(0, 0, 0, 0.25);
}

html, body {
  height: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body, header, nav, main, article, footer, aside {
  /* Ensure predictable box sizing and layout foundations */
  box-sizing: border-box;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  text-rendering: optimizeLegibility;
}

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

/* Layered background: gradient + subtle scanlines/noise (pure CSS) */
html {
  background: linear-gradient(135deg, rgba(0, 120, 255, 0.25) 0%, rgba(0, 60, 180, 0.25) 60%, rgba(0,0,0,0.25) 100%), 
              repeating-linear-gradient(to bottom, rgba(255,255,255,0.04) 0 1px, transparent 1px 2px);
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--text);
  background: linear-gradient(135deg, rgba(0, 120, 255, 0.25), rgba(0, 60, 180, 0.25) 60%, rgba(0,0,0,0.25) 100%),
              repeating-linear-gradient(to bottom, rgba(255,255,255,0.04) 0 1px, transparent 1px 2px);
  background-blend-mode: overlay;
  line-height: 1.5;
  font-size: clamp(14px, 1.4vw, 16px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout helpers & typography tokens */
.container {
  width: min(92%, 1100px);
  margin-inline: auto;
  padding-inline: 0.75rem;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  padding: 0.75rem;
  box-shadow: var(--shadow);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  color: var(--text);
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.25em 0.5em;
  border-radius: 999px;
  background: rgba(0, 170, 255, 0.25);
  border: 1px solid rgba(0, 170, 255, 0.6);
  color: #eaffff;
  line-height: 1;
}

/* Header & navigation styling (glass/frosted look) */
header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1rem 0.75rem;
  margin: 0 auto;
  max-width: 1200px;
  width: 100%;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

header h1 {
  font-size: clamp(1.4rem, 2.6vw, 2.4rem);
  margin: 0.25rem 0;
  letter-spacing: .2px;
  text-align: center;
  color: var(--text);
}

nav {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease, background 0.2s ease;
}
nav a:hover,
nav a:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  text-decoration: underline;
  outline: none;
}
nav a:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Main content area */
main {
  display: grid;
  place-items: start center;
  padding: 1rem 0 2rem;
  width: 100%;
}

article {
  width: 100%;
  display: grid;
  gap: 1rem;
  justify-items: center;
  align-items: start;
}

/* Image frame with aspect-ratio, glow, border */
.image-frame {
  width: min(100%, 760px);
  aspect-ratio: 16 / 9;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.05);
}
.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 0%, rgba(0,180,255,.25), transparent 40%);
  mix-blend-mode: screen;
}

/* Content blocks (glass panels) */
.content {
  width: min(100%, 760px);
  padding: 1rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text);
}

/* Footer sections styled as glass panels */
footer {
  padding: 1rem 1rem 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  justify-items: center;
  align-items: stretch;
  width: 100%;
  background: transparent;
}
.product-ad,
.sponsored-page {
  width: min(100%, 700px);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  padding: 0.75rem;
  text-align: center;
  transition: background 0.2s ease;
}
.product-ad:hover, .sponsored-page:hover {
  background: rgba(255, 255, 255, 0.12);
}
.product-ad a, .sponsored-page a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  color: var(--text);
  text-decoration: none;
}
.product-ad p, .sponsored-page p { margin: 0; }

/* Interactive controls: buttons & links */
a, button, .btn, .cta {
  color: var(--text);
  text-decoration: none;
  background: transparent;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}
a:hover, a:focus-visible {
  text-decoration: underline;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.05rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: linear-gradient(135deg, rgba(12, 82, 255, 0.95), rgba(4, 52, 177, 0.95));
  color: #fff;
  font-weight: 600;
  letter-spacing: .2px;
  transition: transform 0.2s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--outline {
  background: transparent;
  border: 1px solid rgba(125, 200, 255, 0.9);
  color: var(--text);
}
.btn--outline:hover {
  background: rgba(125, 200, 255, 0.12);
}
.cta { display:inline-flex; gap: .5rem; align-items: center; }

/* Lists */
ul, li {
  margin: 0;
  padding: 0;
  list-style: none;
}
li + li { margin-top: 0.5rem; }

/* Print styles (basic readability) */
@media print {
  body {
    background: #fff;
    color: #000;
  }
  header, nav, main, article, footer { background: transparent; box-shadow: none; }
  a, button { text-decoration: underline; color: #000; }
}

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