body {
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: var(--light-bg);
  color: var(--text-color);
  margin: 0;
  padding-top: var(--header-height);  
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height); 
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-color);
  z-index: 99998;
}
.navbar .navbar-brand {
  font-weight: bold;
  color: #fff;
  text-decoration: none;
  font-size: 1.6rem;
  letter-spacing: 0.5px;
  transition: color 0.3s ease;
}
.navbar .navbar-brand:hover {
  color: var(--accent-color);
}


/* Layout */
.main-content {
  display: flex;
  flex-wrap: wrap;
  margin: 2rem auto;
  padding: 0 1rem;
}
.left-column { flex: 1 1 75%; min-width: 300px; padding: 0 15px; }
.right-column { flex: 1 1 20%; min-width: 250px; padding: 0 15px; }


/* Responsive */
@media (max-width: 768px) {
  .main-content { flex-direction: column; }
  .left-column, .right-column { flex: 1 1 100%; padding: 0; }
  .right-column { margin-top: 2rem; }
}