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

:root {
  --bg:       #050c1a;
  --bg2:      #08111f;
  --card:     #0c1726;
  --border:   #1a2d4a;
  --blue:     #00c8ff;
  --blue-dim: #007aaa;
  --purple:   #8b5cf6;
  --text:     #dce8f5;
  --muted:    #6a8fad;
  --radius:   14px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

/* ── Header (shared with landing) ── */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5,12,26,.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0 5vw;
}
.header-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; gap: 2rem;
  height: 64px;
}
.logo {
  font-size: 1.35rem; font-weight: 800; letter-spacing: -.02em;
  background: linear-gradient(90deg, var(--blue), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
nav { display: flex; gap: 1.6rem; margin-left: auto; align-items: center; }
nav a { font-size: .88rem; font-weight: 500; color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--text); }
.btn-nav {
  background: var(--blue); color: #000 !important;
  padding: .4rem 1.1rem; border-radius: 8px;
  font-weight: 600; font-size: .85rem;
}

/* ── Article shell ── */
main { max-width: 760px; margin: 0 auto; padding: 60px 5vw 100px; }
.breadcrumb { font-size: .82rem; color: var(--muted); margin-bottom: 1.6rem; }
.breadcrumb a { color: var(--muted); }
.article-tag {
  display: inline-block; font-size: .75rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--blue);
  margin-bottom: .8rem;
}
h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800; letter-spacing: -.02em; line-height: 1.2;
  margin-bottom: .8rem;
}
.article-meta { font-size: .85rem; color: var(--muted); margin-bottom: 2.4rem; }
article h2 { font-size: 1.4rem; font-weight: 700; margin: 2.2rem 0 .8rem; letter-spacing: -.01em; }
article h3 { font-size: 1.1rem; font-weight: 700; margin: 1.6rem 0 .6rem; }
article p { margin-bottom: 1.1rem; color: var(--text); }
article ul, article ol { margin: 0 0 1.1rem 1.4rem; color: var(--text); }
article li { margin-bottom: .4rem; }
article strong { color: #fff; }
.callout {
  background: var(--card); border: 1px solid var(--border);
  border-left: 3px solid var(--blue); border-radius: var(--radius);
  padding: 1.3rem 1.5rem; margin: 1.6rem 0; font-size: .93rem; color: var(--muted);
}
.cta-box {
  background: linear-gradient(135deg, rgba(0,200,255,.07), rgba(139,92,246,.07));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.8rem; margin: 2.6rem 0; text-align: center;
}
.cta-box p { color: var(--muted); margin-bottom: 1rem; }
.btn-primary {
  display: inline-block; background: var(--blue); color: #000;
  padding: .7rem 1.6rem; border-radius: 10px;
  font-weight: 700; font-size: .95rem; text-decoration: none;
}
.related { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border); }
.related h3 { font-size: 1rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-bottom: 1rem; }
.related ul { list-style: none; margin: 0; display: flex; flex-direction: column; gap: .5rem; }
.related a { font-size: .95rem; }

/* ── Blog index ── */
.blog-hero { max-width: 760px; margin: 0 auto; padding: 60px 5vw 20px; }
.blog-hero h1 { margin-bottom: .6rem; }
.blog-hero p { color: var(--muted); font-size: 1.05rem; }
.post-list { max-width: 760px; margin: 2rem auto 0; padding: 0 5vw 100px; display: flex; flex-direction: column; gap: 1.2rem; }
.post-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.6rem 1.8rem;
  display: block; text-decoration: none; transition: border-color .2s, transform .2s;
}
.post-card:hover { border-color: rgba(0,200,255,.3); transform: translateY(-2px); text-decoration: none; }
.post-card .article-tag { margin-bottom: .5rem; }
.post-card h2 { font-size: 1.2rem; margin: 0 0 .5rem; color: var(--text); }
.post-card p { color: var(--muted); font-size: .92rem; margin: 0; }

footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 2rem 5vw;
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer-logo {
  font-size: 1.1rem; font-weight: 800;
  background: linear-gradient(90deg, var(--blue), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-links { display: flex; gap: 1.6rem; align-items: center; }
.footer-links a { font-size: .85rem; color: var(--muted); }
.footer-inn { font-size: .85rem; color: var(--muted); }
.footer-copy { font-size: .82rem; color: var(--muted); width: 100%; }

@media (max-width: 640px) {
  nav .hide-mobile { display: none; }
  .header-inner { gap: 1rem; height: 56px; }
  main { padding: 40px 5vw 70px; }
}