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

body {
  font-family: system-ui, sans-serif;
  background: #fafafa;
  color: #111;
  line-height: 1.6;
}

/* Container */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.site-header {
  background: #1a1a1a;
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
}
.site-header .logo {
  font-size: 2.5rem;
}
.site-header .tagline {
  font-size: 1.2rem;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Hero Section */
.hero {
  background: #f0f0f0;
  padding: 4rem 1rem;
  text-align: center;
}
.hero h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.hero p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 2rem auto;
}

/* Hero Bubble Chart */
.hero svg circle {
  cursor: pointer;
  transition: transform 0.3s, fill 0.3s;
}
.hero svg circle:hover {
  transform: scale(1.2);
  fill-opacity: 0.8;
}


/* CTA Button */
.cta-button {
  display: inline-block;
  padding: 0.8rem 2rem;
  background: #1a1a1a;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: transform 0.3s, background 0.3s;
  cursor: pointer;
}
.cta-button:hover {
  background: #333;
  transform: scale(1.05);
}

/* Hero Stats Container */
#hero-stats {
  margin-top: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* Cluster Preview Cards in Hero */
.cluster-preview {
  background: #fff;
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}
/* Blog cluster cards in hero */
.cluster-preview a {
  color: #1a1a1a;
  text-decoration: none;
  font-weight: 500;
}
.cluster-preview a:hover {
  text-decoration: underline;
}

.cluster-preview h4 {
  margin-bottom: 0.5rem;
}

.cluster-preview ul {
  list-style-type: none;
  padding-left: 0;
}

.cluster-preview li {
  margin: 0.3rem 0;
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 600px) {
  .site-header .logo { font-size: 2rem; }
  .hero h2 { font-size: 1.5rem; }
  .hero p { font-size: 1rem; }
  .cta-button { padding: 0.6rem 1.5rem; }
  .cluster-preview li { font-size: 0.9rem; }
}