/* Base */
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f6f7f9;
  color: #1f2937;
}

/* Header Navigation */
.topnav {
  overflow: hidden;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  touch-action: none;
  font-weight: bold;
}

.topnav a {
  float: left;
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.topnav a.active {
  background-color: rgba(255, 255, 255, 0.3);
  color: white;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 1050px) {
  .topnav a:not(:first-child) {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 1050px) {
  .topnav.responsive {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 2rem 1rem 1.25rem;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: #4b5563;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
}

@media (min-width: 768px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: #ffffff;
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
}

.card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.card-content {
  padding: 1rem;
}

.card-content h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.card-content p {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: #4b5563;
}

.card-cta {
  font-weight: 600;
  color: #2563eb;
  font-size: 0.95rem;
}

/* SEO Section */
.seo {
  margin: 2rem 0;
}

.seo h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

/* Disclosure */
.disclosure {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: #374151;
  background: #eef2ff;
  padding: 1rem;
  border-radius: 10px;
}

/* Small Note */
.small-note {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: #6b7280;
  text-align: center;
}