body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f5f6fa;
}

.hero-header {
  width: 100%;
  background: linear-gradient(90deg, #2563eb 0%, #1e40af 100%);
  color: #fff;
  padding: 2rem 0 0.5rem 0;
  box-shadow: 0 2px 8px rgba(30,64,175,0.08);
}

.hero-header .site-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  text-align: center;
  letter-spacing: 1px;
}

.top-menu {
  display: flex;
  justify-content: center;
  background: transparent;
  margin-bottom: 0;
}
.top-menu ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  padding: 0;
  margin: 0;
}
.top-menu li {
  margin: 0;
}
.top-menu a {
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  transition: color 0.2s;
}
.top-menu a:hover {
  color: #bae6fd;
}

.main-bg {
  background: #eceff1;
  min-height: 100vh;
  padding: 2rem 0;
}
.main-content {
  background: #fff;
  margin: 0 auto;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(30,64,175,0.07);
  padding: 2rem;
}

/* Block class for vertical spacing, similar to Bulma */
.block {
  display: block;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}