/* ==================== BLOG PAGE STYLES ==================== */
.page-header {
  padding: 140px 0 60px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}
.page-header h1 {
  font-size: 2.6rem;
  font-weight: 800;
  background: var(--gradient-rainbow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.page-header p { font-size: 1.1rem; color: var(--text-secondary); }

.blog-section { padding: 80px 0; }

.blog-categories {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}
.category-btn {
  padding: 10px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.category-btn:hover { border-color: var(--cyan); color: var(--deep-blue); }
.category-btn.active {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-cyan);
}

.blog-empty {
  text-align: center;
  padding: 80px 20px;
  max-width: 500px;
  margin: 0 auto;
}
.empty-icon {
  font-size: 3rem;
  color: var(--cyan);
  margin-bottom: 20px;
  opacity: 0.5;
}
.blog-empty h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.blog-empty > p { color: var(--text-secondary); margin-bottom: 30px; }

.subscribe-form { max-width: 400px; margin: 0 auto; }
.subscribe-group { display: flex; gap: 12px; }
.subscribe-group input {
  flex: 1;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: var(--transition);
}
.subscribe-group input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-100);
}
.subscribe-note {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.featured-topics { margin-top: 80px; }
.featured-topics h3 {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 40px;
  background: var(--gradient-aqua);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.topic-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}
.topic-card:hover::before { opacity: 1; }
.topic-card:hover {
  border-color: var(--cyan);
  transform: translateY(-5px);
  box-shadow: var(--shadow-cyan);
}
.topic-card i {
  font-size: 2rem;
  color: var(--cyan);
  margin-bottom: 16px;
}
.topic-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.topic-card p { color: var(--text-muted); font-size: 0.88rem; }

/* Responsive */
@media (max-width: 640px) {
  .topics-grid { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 1.8rem; }
}
@media (min-width: 641px) and (max-width: 1024px) {
  .topics-grid { grid-template-columns: repeat(2, 1fr); }
  .page-header h1 { font-size: 2.2rem; }
}
@media (min-width: 1025px) {
  .topics-grid { grid-template-columns: repeat(3, 1fr); }
}