html, body {
  height: 100%;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0a1a42;
  --bg-2: #0b2a60;
  --surface: rgba(8, 180, 255, 0.18);
  --text: #e8f7ff;
  --muted: #b6d0e8;
  --accent: #15e0d9;
  --accent-2: #0fb8c9;
  --border: rgba(120, 210, 255, 0.5);
  --glass: rgba(10, 30, 60, 0.28);
  --glass-soft: rgba(10, 30, 60, 0.18);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  --radius: 14px;
}

html, body {
  margin: 0;
  color: var(--text);
  background-color: var(--bg);
  /* Layered background: blue grid paper + gradient + subtle scanlines/noise (pure CSS) */
  background-image:
    /* base gradient layering for depth */
    linear-gradient(135deg, rgba(8,25,70,0.92) 0%, rgba(6,40,88,0.92) 60%, rgba(8,25,70,0.92) 100%),
    linear-gradient(to bottom, rgba(0,0,0,0.15), rgba(0,0,0,0.0)),
    /* retro blue grid paper feel (grid lines) */
    linear-gradient(to right, rgba(20,170,230,0.40) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20,170,230,0.40) 1px, transparent 1px),
    /* subtle scanlines / noise */
    repeating-linear-gradient(to bottom, rgba(255,255,255,0.04), rgba(255,255,255,0.04) 2px, transparent 2px, transparent 4px),
    repeating-linear-gradient(to right, rgba(255,255,255,0.04), rgba(255,255,255,0.04) 2px, transparent 2px, transparent 4px);
  background-size: 
    cover, cover, 40px 40px, 40px 40px, 100% 100%, 100% 100%;
  background-position: center, center, 0 0, 0 0, 0 0, 0 0;
  background-repeat: no-repeat, no-repeat, repeat, repeat, repeat, repeat;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100dvh;
  margin: 0;
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: clamp(720px, 86vw, 1200px);
  margin-inline: auto;
  padding-inline: 1rem;
}

.grid {
  display: grid;
  gap: 1rem;
}
.card {
  background: var(--glass);
  border: 1px solid rgba(120, 210, 255, 0.4);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
}
.glass {
  background: var(--glass);
  border: 1px solid rgba(120, 210, 255, 0.4);
  border-radius: 12px;
  padding: 0.75rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
}
.clear {
  background: transparent;
  border: 0;
  padding: 0;
  margin: 0;
}

/* Typography & hero */
header {
  padding: 2rem 0 1rem;
}
header h1 {
  margin: 0 0 .25rem;
  font-size: clamp(2rem, 4vw + 1rem, 4rem);
  line-height: 1.04;
  letter-spacing: .2px;
  color: #eaffff;
  text-transform: none;
  text-wrap: balance;
}
header .meta {
  margin: 0;
  font-size: clamp(.9rem, 0.8vw + .8rem, 1.05rem);
  color: var(--muted);
}

main {
  display: block;
  padding: 0 0 2rem;
}
.featured-image {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(110, 210, 255, 0.5);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  margin: 1rem 0 1.25rem;
}
.image-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  border: 1px solid rgba(120, 210, 255, 0.5);
  background: #0a1e3a;
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}
.image-frame:hover img {
  transform: scale(1.03);
  filter: saturate(1.05);
}

/* content sections */
article {
  display: block;
  padding: 0;
}
section {
  margin-block: 1rem;
}
section h2 {
  font-size: clamp(1.25rem, 1rem + 2vw, 2rem);
  margin: .25rem 0 0.5rem;
  color: #eaffff;
}
p {
  color: #e8fbff;
  margin: .5rem 0;
}
ul {
  padding-left: 1.25rem;
  color: #eaffff;
}
li {
  margin: .25rem 0;
}
blockquote {
  border-left: 3px solid rgba(21, 224, 217, 0.8);
  padding-left: .75rem;
  color: #dffaff;
  margin: .5rem 0;
  font-style: italic;
  opacity: .95;
}

/* links & CTAs */
a,
button,
.btn,
.cta {
  color: var(--text);
  text-decoration: none;
  background: transparent;
  border: 1px solid rgba(21, 224, 217, 0.4);
  border-radius: 999px;
  padding: .6rem 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  transition: transform .15s ease, background-color .2s ease, border-color .2s ease;
}
a { color: var(--accent); }
a:hover, a:focus { text-decoration: underline; }
.btn, .cta {
  background: rgba(21, 224, 217, 0.32);
  border: 1px solid rgba(21,224,217,0.6);
  color: #04131a;
}
.btn:hover, .cta:hover {
  background: rgba(21,224,217,0.42);
  transform: translateY(-1px);
}
.btn:active, .cta:active {
  transform: translateY(0);
}
.btn--outline {
  background: transparent;
  border: 1px solid rgba(21, 224, 217, 0.8);
  color: var(--text);
}
.btn:focus-visible,
.cta:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 999px;
}
.btn:focus-visible { background: rgba(21,224,217,0.52); }

/* product/ad blocks in footer */
.product-ad, .sponsored-page {
  display: inline-block;
  min-width: max-content;
  margin: .25rem;
}
.product-ad a, .sponsored-page a {
  text-decoration: none;
  color: var(--text);
}
.product-ad { border-radius: 12px; }
.product-ad a {
  display: inline-block;
  padding: .5rem 1rem;
  background: rgba(0, 170, 255, 0.25);
  border: 1px solid rgba(120, 210, 255, 0.5);
  border-radius: 10px;
}
.product-ad a:hover { background: rgba(0, 170, 255, 0.38); }

/* content helpers and utilities */
.tag {
  display: inline-block;
  padding: .15em .5em;
  border-radius: 999px;
  font-size: .75rem;
  border: 1px solid rgba(120, 210, 255, 0.5);
  color: var(--muted);
  background: rgba(8, 180, 255, 0.15);
}
ul li::marker {
  color: #a9eaff;
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; transform: none !important; }
  .image-frame img { transition: none; }
}

@media print {
  body {
    background: #fff;
    color: #000;
  }
  a { text-decoration: underline; color: #000; }
}
```