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

:root {
  --bg: #0b0f14;
  --bg-soft: #111820;
  --card: #151e28;
  --text: #dfe7ee;
  --muted: #8b98a5;
  --accent: #38e1a8;
  --accent-2: #4da3ff;
  --border: #22303d;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  position: sticky; top: 0; z-index: 10;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; }
.logo { font-size: 1.3rem; font-weight: 800; color: var(--text); letter-spacing: .5px; }
.logo span { color: var(--accent); }
.main-nav a { margin-left: 18px; color: var(--muted); font-size: .95rem; }
.main-nav a:hover { color: var(--accent); }

/* Hero */
.hero { padding: 70px 0 50px; text-align: center; }
.hero h1 { font-size: 2.1rem; line-height: 1.3; max-width: 700px; margin: 0 auto 16px; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 620px; margin: 0 auto 24px; }
.btn {
  display: inline-block; background: var(--accent); color: #06120d;
  padding: 12px 28px; border-radius: 6px; font-weight: 700;
}
.btn:hover { text-decoration: none; background: #4ff0b6; }

/* Sections */
.featured, .categories { padding: 30px 20px; }
.featured h2, .categories h2 { font-size: 1.5rem; margin-bottom: 18px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.categories p { color: var(--muted); margin-bottom: 24px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 24px; margin-bottom: 20px;
}
.card h3 { margin: 10px 0 8px; font-size: 1.25rem; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); }
.card p { color: var(--muted); }

.tag {
  display: inline-block; background: rgba(56,225,168,.12); color: var(--accent);
  font-size: .78rem; font-weight: 700; padding: 3px 10px; border-radius: 20px;
  text-transform: uppercase; letter-spacing: .4px;
}

/* Article */
.article-wrap { padding: 40px 0; }
.article-header h1 { font-size: 1.9rem; line-height: 1.35; margin: 14px 0 8px; }
.byline { color: var(--muted); font-size: .9rem; margin-bottom: 26px; border-bottom: 1px solid var(--border); padding-bottom: 18px; }
article h2 { font-size: 1.45rem; margin: 36px 0 14px; color: var(--accent-2); }
article h3 { font-size: 1.15rem; margin: 26px 0 10px; }
article p { margin-bottom: 16px; }
article ul, article ol { margin: 0 0 18px 24px; }
article li { margin-bottom: 8px; }
article strong { color: #fff; }

article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: .95rem; }
article th { background: var(--card); text-align: left; padding: 10px 12px; border: 1px solid var(--border); }
article td { padding: 10px 12px; border: 1px solid var(--border); vertical-align: top; }

.article-end {
  border-top: 1px solid var(--border); border-left: 3px solid var(--accent);
  padding: 14px 16px; margin-top: 30px; color: var(--muted); background: var(--bg-soft);
}
.related { margin-top: 40px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 22px; }
.related h3 { margin-bottom: 8px; color: var(--accent); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 50px; padding: 26px 0; background: var(--bg-soft); }
.site-footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.site-footer p { color: var(--muted); font-size: .9rem; }
.site-footer nav a { margin-left: 14px; color: var(--muted); font-size: .9rem; }

/* ===== Ad slots ===== */
.ad-slot { margin: 26px auto; text-align: center; }
.ad-label { display: block; font-size: .68rem; letter-spacing: 1.4px; text-transform: uppercase; color: var(--muted); opacity: .55; margin-bottom: 6px; }
.ad-slot iframe { max-width: 100%; }
.ad-leader { max-width: 728px; }
.ad-rect { max-width: 300px; }
.ad-banner { max-width: 468px; }
.ad-mobile { max-width: 320px; }
.ad-sky { max-width: 160px; }
.ad-native { max-width: 100%; }

/* Article + sidebar layout */
.article-main { min-width: 0; }
.ad-sidebar { margin-top: 26px; }
.ad-sidebar .ad-slot { margin: 0 0 30px; }
@media (min-width: 1000px) {
  .article-wrap.layout-sidebar { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 36px; align-items: start; }
  .ad-sidebar { position: sticky; top: 84px; margin-top: 0; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 1.6rem; }
  .article-header h1 { font-size: 1.5rem; }
  .main-nav a { margin-left: 10px; font-size: .85rem; }
}