:root {
      --js-yellow: #f7df1e;
      --js-dark: #323330;
      --white: #ffffff;
      --light-yellow: #fff9c4;
      --hover-yellow: #ffe600;
    }
    
    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--js-dark);
      background-color: var(--white);
      margin: 0;
      padding: 0;
      transition: background-color 0.3s ease;
    }
    
    .navbar {
      background-color: var(--js-yellow);
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    
    .navbar-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.8rem 2rem;
    }
    
    .navbar-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    .navbar-logo img {
      width: 40px;
      height: 40px;
    }
    
    .navbar-logo h1 {
      font-size: 1.5rem;
      color: var(--js-dark);
      margin: 0;
    }
    
    .navbar-menu {
      display: flex;
      list-style: none;
      gap: 1.5rem;
      margin: 0;
      padding: 0;
    }
    
    .navbar-menu li a {
      color: var(--js-dark);
      text-decoration: none;
      font-weight: 500;
      transition: color 0.3s;
      padding: 0.5rem;
      border-radius: 4px;
    }
    
    .navbar-menu li a:hover {
      color: var(--white);
      background-color: rgba(50, 51, 48, 0.1);
    }
    
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--js-dark);
      cursor: pointer;
    }
    
    .subtopic-container {
      max-width: 1200px;
      margin: 2rem auto;
      padding: 0 2rem;
    }
    
    .subtopic-header {
      margin-bottom: 2rem;
      border-bottom: 3px solid var(--js-yellow);
      padding-bottom: 1rem;
    }
    
    .breadcrumbs {
      margin-bottom: 1rem;
      font-size: 0.9rem;
    }
    
    .breadcrumbs a {
      color: var(--js-dark);
      text-decoration: none;
    }
    
    .breadcrumbs a:hover {
      text-decoration: underline;
    }
    
    .subtopic-header h1 {
      font-size: 2.5rem;
      color: var(--js-dark);
      margin: 0.5rem 0;
    }
    
    .subtopic-section {
      background-color: var(--white);
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
      margin-bottom: 2rem;
      overflow: hidden;
      border-left: 5px solid var(--js-yellow);
    }
    
    .subtopic-section-header {
      background-color: var(--js-yellow);
      padding: 1rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    .subtopic-section-header i {
      font-size: 1.2rem;
      color: var(--js-dark);
    }
    
    .subtopic-section-header h2 {
      margin: 0;
      font-size: 1.3rem;
      color: var(--js-dark);
    }
    
    .subtopic-section-body {
      padding: 1.5rem;
      background-color: var(--white);
    }
    
    .code-block {
      background-color: var(--js-dark);
      border-radius: 6px;
      overflow: hidden;
      margin: 1.5rem 0;
    }
    
    .code-block-header {
      background-color: var(--js-yellow);
      padding: 0.6rem 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    .code-block-header span {
      color: var(--js-dark);
      font-weight: 500;
    }
    
    .copy-button {
      background-color: var(--js-dark);
      color: var(--white);
      border: none;
      padding: 0.3rem 0.8rem;
      border-radius: 4px;
      cursor: pointer;
      font-size: 0.8rem;
      transition: all 0.2s;
    }
    
    .copy-button:hover {
      background-color: rgba(50, 51, 48, 0.8);
    }
    
    pre {
      margin: 0;
      padding: 1rem;
      overflow-x: auto;
    }
    
    code {
      font-family: 'Fira Code', monospace;
      font-size: 0.9rem;
    }
    
    .mcq-section {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    
    .mcq-item {
      background-color: var(--light-yellow);
      padding: 1.2rem;
      border-radius: 6px;
      border-left: 4px solid var(--js-yellow);
    }
    
    .mcq-item strong {
      color: var(--js-dark);
    }
    
    .mcq-item p:last-child {
      margin-bottom: 0;
      font-weight: 500;
    }
    
    .navigation-buttons {
      display: flex;
      justify-content: space-between;
      margin-top: 2rem;
    }
    
    .nav-button {
      display: inline-flex;
      align-items: center;
      padding: 0.8rem 1.2rem;
      background-color: var(--js-yellow);
      color: var(--js-dark);
      text-decoration: none;
      border-radius: 6px;
      font-weight: 500;
      transition: all 0.3s;
    }
    
    .nav-button:hover {
      background-color: var(--hover-yellow);
      transform: translateY(-2px);
    }
    
    .nav-button.prev i {
      margin-right: 8px;
    }
    
    .nav-button.next i {
      margin-left: 8px;
    }
    
    .footer {
  background-color: #2f302d;
  padding: 1.5rem 0;
  margin-top: 2rem;
  color: white;
  font-family: 'Segoe UI', sans-serif;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  padding: 0 1.5rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-logo img {
  width: 30px;
  height: 30px;
}

.footer-logo h2 {
  font-size: 1.25rem;
  color: white;
  margin: 0;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-links a {
  color: white;
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: #f0db4f; /* JS Yellow */
}

.footer-text {
  width: 100%;
  text-align: center;
  margin-top: 1rem;
  font-size: 0.875rem;
  color: #cccccc;
}
  
    .dark-mode-toggle {
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: var(--js-yellow);
      color: var(--js-dark);
      border: none;
      font-size: 1.2rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      transition: all 0.3s;
    }
    
    .dark-mode-toggle:hover {
      background-color: var(--hover-yellow);
      transform: scale(1.05);
    }
    
    .page-transition {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: var(--js-yellow);
      z-index: 9999;
      transform: translateY(-100%);
      transition: transform 0.6s;
    }
    
    
    @keyframes spin {
      from { transform: rotate(0deg); }
      to { transform: rotate(360deg); }
    }
    
    /* Dark mode styles */
    body.dark-mode {
      background-color: #1e1e1e;
      color: #e0e0e0;
    }
    
    body.dark-mode .subtopic-section {
      background-color: #2d2d2d;
      border-left: 5px solid var(--js-yellow);
    }
    
    body.dark-mode .subtopic-section-body {
      background-color: #2d2d2d;
    }
    
    body.dark-mode .mcq-item {
      background-color: #333333;
    }
    
    body.dark-mode .navbar {
      background-color: #2d2d2d;
    }
    
    body.dark-mode .navbar-logo h1,
    body.dark-mode .navbar-menu li a {
      color: var(--js-yellow);
    }
    
    body.dark-mode .menu-toggle {
      color: var(--js-yellow);
    }
    
    body.dark-mode .subtopic-section-header {
      background-color: #3a3a3a;
    }
    
    body.dark-mode .subtopic-section-header i,
    body.dark-mode .subtopic-section-header h2 {
      color: var(--js-yellow);
    }
    
    body.dark-mode .code-block-header {
      background-color: #3a3a3a;
    }
    
    body.dark-mode .code-block-header span {
      color: var(--js-yellow);
    }
    
    /* Responsive styles */
    @media (max-width: 768px) {
      .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--js-yellow);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
      }
      
      .navbar-menu.active {
        display: flex;
      }
      
      .menu-toggle {
        display: block;
      }
      
      .footer-container {
        flex-direction: column;
        gap: 1.5rem;
      }
      
      .navigation-buttons {
        flex-direction: column;
        gap: 1rem;
      }
    }
    .back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-color, #f0f0f0);
  background-color: #3a3b38;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.3s ease, transform 0.2s ease;
  margin-bottom: 0.75rem;
}

.back-button i {
  font-size: 1rem;
}

.back-button:hover {
  background-color: #4e4f4c;
  transform: translateX(-2px);
}