/* Navigation Styles - Sử dụng chung cho tất cả các trang */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(135deg, rgba(26, 26, 46, 0.95) 0%, rgba(22, 33, 62, 0.95) 100%);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid #ffd700;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand a {
  color: #ffd700;
  font-size: 24px;
  font-weight: bold;
  text-decoration: none;
  text-shadow: 0 0 10px #ffd700;
  transition: all 0.3s;
}

.nav-brand a:hover {
  text-shadow: 0 0 20px #ffd700;
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 20px;
}

.nav-menu li {
  margin: 0;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 25px;
  font-weight: bold;
  font-size: 16px;
  transition: all 0.3s;
  display: block;
  border: 2px solid transparent;
}

.nav-link:hover {
  background: rgba(255, 215, 0, 0.2);
  border-color: #ffd700;
  color: #ffd700;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.nav-link.active {
  background: linear-gradient(to bottom, #ffd700, #ffed4e);
  color: #c41e3a;
  border-color: #ffd700;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 15px;
  }
  
  .nav-menu {
    width: 100%;
    justify-content: center;
  }
  
  .nav-link {
    padding: 8px 15px;
    font-size: 14px;
  }
}