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

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f4f4;
  color: #333;
  line-height: 1.6;
}

header {
  background-color: #323F6E;
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

header p {
  font-size: 1.2rem;
  color: #ccc;
}

.container {
  display: flex;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: auto;
  padding: 1rem;
  gap: 2rem;
}

main {
  flex: 3;
}

aside {
  flex: 1;
}

article {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

article:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

article h2, article h3 {
  color: #323F6E;
  margin-bottom: 0.5rem;
}

article p, article ul {
  color: #555;
}

article ul {
  list-style-type: disc;
  padding-left: 1.5rem;
}

article a {
  color: #0077cc;
  text-decoration: none;
}

article a:hover {
  text-decoration: underline;
}

.ad-slot, .top-ad {
  background-color: #e9ecef;
  border: 2px dashed #ccc;
  border-radius: 6px;
  padding: 1rem;
  text-align: center;
  font-style: italic;
  color: #777;
}

footer {
  background: #323F6E;
  color: white;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 2rem;
  font-size: 0.9rem;
}

@media (max-width: 1024px) {
  .container {
    padding: 1rem;
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  .container {
    flex-direction: column;
    gap: 1rem;
  }

  header h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 0.95rem;
  }

  article {
    padding: 1rem;
  }

  .ad-slot, .top-ad {
    font-size: 0.85rem;
  }
}

.center-ad {
  margin: 2rem auto;
  display: flex;
  justify-content: center;
}

/* Mobile enhancements */
@media (max-width: 480px) {
  header img {
    height: 48px;
  }

  article h2 {
    font-size: 1.2rem;
  }

  .ad-slot, .top-ad {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  #div-gpt-ad-center {
    height: 250px !important;
  }
}