:root {
  --bg: #fafbfc;
  --white: #ffffff;
  --dark: #1e293b;
  --mid: #475569;
  --light: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --border: #e2e8f0;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.7;
}

nav {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 65px;
}

nav .brand {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 1px;
}

nav ul { list-style: none; display: flex; gap: 2rem; }

nav a {
  color: var(--mid);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover { color: var(--accent); }

.hero {
  background: linear-gradient(135deg, var(--accent) 0%, #1e40af 100%);
  color: white;
  text-align: center;
  padding: 6rem 2rem;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 300;
  margin-bottom: 1.5rem;
}

.hero h1 strong { font-weight: 700; }

.hero p {
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto 2rem;
  opacity: 0.9;
  line-height: 1.8;
}

.hero .cta {
  display: inline-block;
  background: var(--white);
  color: var(--accent);
  padding: 0.8rem 2.2rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  border-radius: 4px;
  transition: transform 0.2s;
}

.hero .cta:hover { transform: translateY(-1px); }

.content {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem;
  color: var(--dark);
}

.content p {
  margin-bottom: 1.2rem;
  color: var(--mid);
}

.content .page-intro {
  font-size: 1.05rem;
  color: var(--dark);
  border-left: 3px solid var(--accent);
  padding-left: 1.5rem;
  margin-bottom: 2.5rem;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.pillar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
}

.pillar h3 {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}

.pillar p {
  font-size: 0.9rem;
  color: var(--mid);
  margin: 0;
}

footer {
  background: var(--dark);
  color: var(--light);
  padding: 2.5rem 2rem;
  text-align: center;
}

footer p { font-size: 0.85rem; margin-bottom: 0.5rem; }
footer a { color: var(--accent-light); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  nav ul { display: none; }
  .pillars { grid-template-columns: 1fr; }
}

/* Blog / article list */
.article-list { list-style: none; }
.article-list li {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}
.article-list a {
  color: var(--dark);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
}
.article-list a:hover { color: var(--accent); }
.article-list .meta {
  font-size: 0.8rem;
  color: var(--light);
  margin-top: 0.3rem;
}
.article-list .summary {
  font-size: 0.9rem;
  color: var(--mid);
  margin-top: 0.4rem;
}
.tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
  border-radius: 3px;
  margin-right: 0.3rem;
}