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

:root {
  --bg: #0a0a0a;
  --surface: #111;
  --border: #222;
  --text: #e0e0e0;
  --text-dim: #888;
  --heading: #fff;
  --cyan: #00e5ff;
  --red: #ff3b3b;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.blog-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}
.blog-nav .logo {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--heading);
  text-decoration: none;
}
.blog-nav .logo span { color: var(--cyan); }
.blog-nav .nav-links { display: flex; gap: 24px; align-items: center; }
.blog-nav .nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.blog-nav .nav-links a:hover { color: var(--heading); }
.btn-cta {
  background: var(--cyan);
  color: #000;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: opacity 0.2s;
}
.btn-cta:hover { opacity: 0.85; }

/* ARTICLE */
.article-wrapper {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}
.article-meta {
  margin-bottom: 32px;
}
.article-meta .tag {
  display: inline-block;
  background: rgba(0, 229, 255, 0.1);
  color: var(--cyan);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.article-meta time {
  color: var(--text-dim);
  font-size: 0.85rem;
}
.article-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.2;
  margin-bottom: 16px;
}
.article-subtitle {
  font-size: 1.15rem;
  color: var(--text-dim);
  margin-bottom: 40px;
  line-height: 1.6;
}

/* CONTENT */
.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--heading);
  margin: 48px 0 16px;
}
.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--heading);
  margin: 36px 0 12px;
}
.article-content p {
  margin-bottom: 20px;
}
.article-content strong {
  color: var(--heading);
}
.article-content ul, .article-content ol {
  margin: 16px 0 24px 24px;
}
.article-content li {
  margin-bottom: 10px;
}
.article-content a {
  color: var(--cyan);
  text-decoration: none;
}
.article-content a:hover {
  text-decoration: underline;
}
.article-content blockquote {
  border-left: 3px solid var(--cyan);
  padding: 16px 24px;
  margin: 24px 0;
  background: var(--surface);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-dim);
}

/* CALLOUT BOX */
.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
  margin: 32px 0;
}
.callout.callout-cyan { border-left: 4px solid var(--cyan); }
.callout.callout-red { border-left: 4px solid var(--red); }
.callout h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--heading);
  margin-bottom: 8px;
}

/* TABLE */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95rem;
}
.article-content th {
  background: var(--surface);
  color: var(--heading);
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}
.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.article-content tr:hover td {
  background: rgba(255,255,255,0.02);
}

/* CTA SECTION */
.article-cta {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  margin: 48px 0;
}
.article-cta h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--heading);
  margin-bottom: 12px;
}
.article-cta p {
  color: var(--text-dim);
  margin-bottom: 24px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.article-cta .btn-cta {
  display: inline-block;
}

/* FOOTER */
.blog-footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.blog-footer a { color: var(--cyan); text-decoration: none; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .blog-nav { padding: 16px 20px; }
  .article-wrapper { padding: 40px 20px 60px; }
  .article-title { font-size: 1.8rem; }
  .article-content h2 { font-size: 1.35rem; }
  .blog-nav .nav-links a:not(.btn-cta) { display: none; }
}