:root {
  --bg: #0a111d;
  --bg2: #0e1828;
  --card: #121f33;
  --line: #1e3350;
  --text: #c7d6e8;
  --muted: #8ba3bd;
  --ice: #7fd4ff;
  --ice2: #4aa8e0;
  --warm: #ffb45e;
  --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: linear-gradient(180deg, #060b14 0%, var(--bg) 30%, var(--bg2) 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--ice); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(10, 17, 29, 0.92);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(6px);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
}
.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
}
.logo span { color: var(--ice); }
nav.main-nav a {
  color: var(--muted);
  margin-left: 18px;
  font-size: 0.92rem;
  font-weight: 600;
}
nav.main-nav a:first-child { margin-left: 0; }
nav.main-nav a:hover, nav.main-nav a.active { color: var(--ice); }

/* Hero */
.hero {
  text-align: center;
  padding: 72px 20px 60px;
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(127, 212, 255, 0.18), transparent 70%),
    linear-gradient(180deg, rgba(18, 31, 51, 0.4), transparent);
  border-bottom: 1px solid var(--line);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero h1 em { color: var(--ice); font-style: normal; }
.hero p.lead {
  max-width: 680px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 1.1rem;
}
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  margin: 6px 8px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--ice), var(--ice2));
  color: #06121f;
}
.btn-primary:hover { text-decoration: none; filter: brightness(1.1); }
.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--ice); color: var(--ice); text-decoration: none; }

/* Countdown banner */
.demo-banner {
  background: linear-gradient(90deg, rgba(255, 180, 94, 0.14), rgba(127, 212, 255, 0.10));
  border: 1px solid rgba(255, 180, 94, 0.35);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 32px 0;
  color: var(--text);
}
.demo-banner strong { color: var(--warm); }
.demo-banner p { margin: 0; font-size: 1rem; }

/* Sections */
.section { padding: 44px 0 12px; }
.section > h2 {
  color: #fff;
  font-size: 1.6rem;
  margin-bottom: 22px;
  padding-left: 12px;
  border-left: 4px solid var(--ice);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform 0.15s ease, border-color 0.15s ease;
  display: block;
  color: var(--text);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--ice2);
  text-decoration: none;
}
.card .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ice);
  background: rgba(127, 212, 255, 0.10);
  border: 1px solid rgba(127, 212, 255, 0.25);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.card h3 { color: #fff; font-size: 1.08rem; margin-bottom: 8px; line-height: 1.4; }
.card p { color: var(--muted); font-size: 0.92rem; }
.card time { color: var(--muted); font-size: 0.8rem; display: block; margin-top: 10px; }

/* Facts strip */
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin: 26px 0 34px;
}
.fact {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.fact .num { color: var(--ice); font-size: 1.4rem; font-weight: 800; display: block; }
.fact .lbl { color: var(--muted); font-size: 0.85rem; }

/* Article pages */
.article-wrap { padding: 40px 0 20px; }
article h1 {
  color: #fff;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.25;
  margin-bottom: 10px;
}
.article-meta { color: var(--muted); font-size: 0.88rem; margin-bottom: 30px; }
article h2 {
  color: var(--ice);
  font-size: 1.35rem;
  margin: 36px 0 14px;
  padding-left: 10px;
  border-left: 3px solid var(--ice2);
}
article p, article li { color: var(--text); }
article p { margin-bottom: 16px; }
article ul, article ol { margin: 0 0 18px 24px; }
article li { margin-bottom: 8px; }
article strong { color: #eaf4ff; }
article .callout {
  background: rgba(127, 212, 255, 0.07);
  border: 1px solid rgba(127, 212, 255, 0.25);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 22px 0;
}
article .callout.warn {
  background: rgba(255, 180, 94, 0.08);
  border-color: rgba(255, 180, 94, 0.35);
}
article .callout.warn strong { color: var(--warm); }

/* Related */
.related {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 28px;
}
.related h2 { font-size: 1.2rem; color: #fff; margin-bottom: 18px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 60px;
  padding: 34px 0 40px;
  background: rgba(6, 11, 20, 0.6);
}
.site-footer .disclaimer {
  color: var(--muted);
  font-size: 0.84rem;
  font-style: italic;
  margin-bottom: 12px;
  max-width: 720px;
}
.site-footer .foot-links { font-size: 0.86rem; }
.site-footer .foot-links a { color: var(--muted); margin-right: 16px; }
.site-footer .foot-links a:hover { color: var(--ice); }

@media (max-width: 600px) {
  .site-header .container { flex-direction: column; gap: 10px; }
  nav.main-nav a { margin: 0 8px; }
}