:root {
      --primary: #4f46e5;
      --primary-dark: #4338ca;
      --primary-light: #818cf8;
      --violet: #7c3aed;
      --amber: #f59e0b;
      --dark: #0f172a;
      --dark-soft: #1e293b;
      --light: #f8fafc;
      --muted: #64748b;
      --muted-light: #94a3b8;
      --card-bg: #ffffff;
      --border: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.1);
      --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.15);
      --radius: 16px;
      --radius-sm: 10px;
      --radius-full: 9999px;
      --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
      --font-heading: 'Poppins', 'Inter', sans-serif;
  }

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

  html {
      scroll-behavior: smooth;
  }

  body {
      font-family: var(--font-body);
      background: var(--light);
      color: var(--dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
  }

  img {
      max-width: 100%;
      display: block;
  }

  a {
      text-decoration: none;
      color: inherit;
  }

  .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
  }

  /* Navbar */
  .navbar {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
      transition: var(--transition);
  }

  .navbar.scrolled {
      box-shadow: var(--shadow-md);
  }

  .navbar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 14px;
      padding-bottom: 14px;
      gap: 16px;
  }

  .navbar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.15rem;
      letter-spacing: -0.3px;
      color: var(--dark);
      white-space: nowrap;
  }

  .navbar-brand .brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
      flex-shrink: 0;
  }

  .navbar-links {
      display: flex;
      align-items: center;
      gap: 6px;
      list-style: none;
  }

  .navbar-links li a {
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      font-weight: 500;
      font-size: 0.9rem;
      color: var(--muted);
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 6px;
  }

  .navbar-links li a:hover,
  .navbar-links li a.active {
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
  }

  .nav-auth {
      display: flex;
      align-items: center;
      gap: 8px;
      position: relative;
  }

  .btn-login {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 18px;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      color: #fff;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
      white-space: nowrap;
  }

  .btn-login:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(79, 70, 229, 0.45);
  }

  .btn-signup {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      box-shadow: none;
  }

  .btn-signup:hover {
      background: rgba(79, 70, 229, 0.08);
      box-shadow: none;
      transform: translateY(-2px);
  }

  .user-dropdown-btn {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 14px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-full);
      cursor: pointer;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--dark);
      transition: var(--transition);
      white-space: nowrap;
  }

  .user-dropdown-btn:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-sm);
  }

  .user-avatar {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--amber), #f97316);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 0.85rem;
      flex-shrink: 0;
  }

  .user-dropdown-menu {
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      background: #fff;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      min-width: 200px;
      padding: 8px;
      display: none;
      z-index: 1001;
      animation: fadeInDown 0.2s ease;
  }

  .user-dropdown-menu.show {
      display: block;
  }

  .user-dropdown-menu .user-info {
      padding: 12px 14px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 6px;
  }

  .user-dropdown-menu .user-info .user-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--dark);
  }

  .user-dropdown-menu .user-info .user-role {
      font-size: 0.8rem;
      color: var(--muted);
      text-transform: capitalize;
  }

  .user-dropdown-menu a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--dark-soft);
      transition: var(--transition);
  }

  .user-dropdown-menu a:hover {
      background: rgba(79, 70, 229, 0.06);
      color: var(--primary);
  }

  .user-dropdown-menu a.logout-link {
      color: #ef4444;
  }

  .user-dropdown-menu a.logout-link:hover {
      background: rgba(239, 68, 68, 0.06);
      color: #dc2626;
  }

  .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      z-index: 1002;
  }

  .hamburger span {
      width: 24px;
      height: 2.5px;
      background: var(--dark);
      border-radius: 2px;
      transition: var(--transition);
  }

  .hamburger.active span:nth-child(1) {
      transform: translateY(7.5px) rotate(45deg);
  }

  .hamburger.active span:nth-child(2) {
      opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
      transform: translateY(-7.5px) rotate(-45deg);
  }

  /* Hero (unchanged) */
  .hero {
      position: relative;
      min-height: 480px;
      display: flex;
      align-items: center;
      overflow: hidden;
      background: var(--dark);
      padding: 80px 0 100px;
  }

  .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('https://images.unsplash.com/photo-1509062522246-3755977927d7?w=1600&q=80&auto=format&fit=crop');
      background-size: cover;
      background-position: center;
      z-index: 0;
      animation: heroZoom 20s ease-in-out infinite alternate;
  }

  @keyframes heroZoom {
      0% {
          transform: scale(1);
      }

      100% {
          transform: scale(1.1);
      }
  }

  .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg,
              rgba(30, 27, 75, 0.9) 0%,
              rgba(79, 70, 229, 0.82) 50%,
              rgba(124, 58, 237, 0.75) 100%);
      z-index: 1;
  }

  .hero .container {
      position: relative;
      z-index: 2;
      text-align: center;
      color: #fff;
  }

  .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(10px);
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 500;
      margin-bottom: 20px;
      letter-spacing: 0.3px;
      border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .hero h1 {
      font-family: var(--font-heading);
      font-size: 3.2rem;
      font-weight: 800;
      letter-spacing: -1.5px;
      line-height: 1.15;
      margin-bottom: 16px;
      text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  }

  .hero h1 .highlight {
      background: linear-gradient(135deg, #fbbf24, #f59e0b);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
  }

  .hero p {
      font-size: 1.15rem;
      max-width: 620px;
      margin: 0 auto 30px;
      color: rgba(255, 255, 255, 0.9);
      font-weight: 400;
  }

  .hero-search {
      max-width: 650px;
      margin: 0 auto 30px;
      position: relative;
  }

  .hero-search .search-icon {
      position: absolute;
      left: 20px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--muted);
      font-size: 1rem;
      pointer-events: none;
  }

  .hero-search input {
      width: 100%;
      padding: 16px 20px 16px 50px;
      border-radius: var(--radius-full);
      border: 2px solid rgba(255, 255, 255, 0.3);
      background: rgba(255, 255, 255, 0.95);
      font-size: 1rem;
      font-family: var(--font-body);
      outline: none;
      transition: var(--transition);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  }

  .hero-search input:focus {
      border-color: var(--amber);
      box-shadow: 0 8px 40px rgba(245, 158, 11, 0.35);
  }

  .hero-cta {
      display: flex;
      gap: 14px;
      justify-content: center;
      flex-wrap: wrap;
  }

  .btn-hero {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 14px 28px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 1rem;
      transition: var(--transition);
      cursor: pointer;
  }

  .btn-hero-primary {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  }

  .btn-hero-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
  }

  .btn-hero-outline {
      background: transparent;
      border: 2px solid rgba(255, 255, 255, 0.5);
      color: #fff;
  }

  .btn-hero-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #fff;
  }

  /* Stats, Quiz Section, How It Works, Footer (all remain unchanged) */
  .stats-bar {
      background: #fff;
      border-bottom: 1px solid var(--border);
      padding: 20px 0;
  }

  .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 20px;
      text-align: center;
  }

  .stat-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
  }

  .stat-item .stat-number {
      font-family: var(--font-heading);
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
  }

  .stat-item .stat-label {
      font-size: 0.85rem;
      color: var(--muted);
      font-weight: 500;
  }

  .quiz-section {
      padding: 60px 0;
  }

  .section-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
  }

  .section-header h2 {
      font-family: var(--font-heading);
      font-size: 1.8rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 12px;
  }

  .section-header h2 i {
      color: var(--primary);
      font-size: 1.5rem;
  }

  .section-header .section-badge {
      background: rgba(79, 70, 229, 0.08);
      color: var(--primary);
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.85rem;
  }

  .quiz-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 24px;
  }

  .quiz-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      animation: fadeInUp 0.5s ease both;
      position: relative;
  }

  .quiz-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary-light);
  }

  .quiz-card-img {
      position: relative;
      height: 160px;
      overflow: hidden;
  }

  .quiz-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
  }

  .quiz-card:hover .quiz-card-img img {
      transform: scale(1.08);
  }

  .quiz-card-img .img-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(15, 23, 42, 0.6) 0%, transparent 60%);
  }

  .quiz-badge-top {
      position: absolute;
      top: 12px;
      left: 12px;
      z-index: 2;
      display: flex;
      gap: 8px;
  }

  .badge {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 5px 12px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 0.72rem;
      letter-spacing: 0.4px;
      text-transform: uppercase;
  }

  .badge-live {
      background: linear-gradient(135deg, #ef4444, #f97316);
      color: #fff;
      box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
      animation: pulseLive 1.8s ease-in-out infinite;
  }

  @keyframes pulseLive {

      0%,
      100% {
          box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
      }

      50% {
          box-shadow: 0 4px 24px rgba(239, 68, 68, 0.7);
      }
  }

  .badge-available {
      background: rgba(255, 255, 255, 0.85);
      color: var(--dark);
      backdrop-filter: blur(8px);
  }

  .quiz-card-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      flex: 1;
  }

  .quiz-card-title {
      font-family: var(--font-heading);
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: -0.3px;
      color: var(--dark);
      line-height: 1.35;
  }

  .quiz-card-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      font-size: 0.82rem;
      color: var(--muted);
  }

  .quiz-card-meta span {
      display: flex;
      align-items: center;
      gap: 5px;
  }

  .quiz-card-meta i {
      color: var(--primary-light);
      font-size: 0.8rem;
  }

  .quiz-card-footer {
      margin-top: auto;
      padding-top: 14px;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
  }

  .quiz-creator {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      color: var(--muted);
      font-weight: 500;
  }

  .quiz-creator .creator-avatar {
      width: 26px;
      height: 26px;
      background: linear-gradient(135deg, var(--primary-light), var(--violet));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 0.65rem;
      font-weight: 700;
  }

  .btn-take-quiz {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 8px 16px;
      background: var(--primary);
      color: #fff;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.85rem;
      transition: var(--transition);
      white-space: nowrap;
  }

  .btn-take-quiz:hover {
      background: var(--primary-dark);
      transform: translateX(2px);
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
  }

  .btn-take-quiz i {
      font-size: 0.75rem;
  }

  .empty-state {
      text-align: center;
      padding: 60px 20px;
      background: #fff;
      border-radius: var(--radius);
      border: 2px dashed var(--border);
      color: var(--muted);
  }

  .empty-state i {
      font-size: 3rem;
      color: var(--primary-light);
      margin-bottom: 16px;
      opacity: 0.6;
  }

  .empty-state h3 {
      font-family: var(--font-heading);
      font-size: 1.2rem;
      color: var(--dark);
      margin-bottom: 8px;
  }

  .empty-state a {
      color: var(--primary);
      font-weight: 600;
      text-decoration: underline;
  }

  .how-section {
      padding: 60px 0;
      background: #fff;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
  }

  .how-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
      margin-top: 30px;
  }

  .how-card {
      text-align: center;
      padding: 32px 24px;
      background: var(--light);
      border-radius: var(--radius);
      border: 1px solid var(--border);
      transition: var(--transition);
  }

  .how-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-light);
  }

  .how-card .how-icon {
      width: 64px;
      height: 64px;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 18px;
      color: #fff;
      font-size: 1.5rem;
      box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
  }

  .how-card h3 {
      font-family: var(--font-heading);
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
  }

  .how-card p {
      font-size: 0.9rem;
      color: var(--muted);
  }

  .footer {
      background: var(--dark);
      color: var(--muted-light);
      padding: 40px 0 20px;
  }

  .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      margin-bottom: 30px;
  }

  .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 12px;
  }

  .footer-brand .brand-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 0.9rem;
  }

  .footer p {
      font-size: 0.85rem;
      line-height: 1.7;
  }

  .footer h4 {
      font-family: var(--font-heading);
      color: #fff;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 14px;
  }

  .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
  }

  .footer-links a {
      font-size: 0.85rem;
      color: var(--muted-light);
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 8px;
  }

  .footer-links a:hover {
      color: #fff;
      transform: translateX(4px);
  }

  .footer-links a i {
      font-size: 0.7rem;
      color: var(--primary-light);
  }

  .footer-social {
      display: flex;
      gap: 10px;
      margin-top: 12px;
  }

  .footer-social a {
      width: 36px;
      height: 36px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 0.9rem;
      transition: var(--transition);
  }

  .footer-social a:hover {
      background: var(--primary);
      transform: translateY(-3px);
  }

  .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 20px;
      text-align: center;
      font-size: 0.8rem;
      color: var(--muted-light);
  }

  @keyframes fadeInUp {
      from {
          opacity: 0;
          transform: translateY(20px);
      }

      to {
          opacity: 1;
          transform: translateY(0);
      }
  }

  @keyframes fadeInDown {
      from {
          opacity: 0;
          transform: translateY(-8px);
      }

      to {
          opacity: 1;
          transform: translateY(0);
      }
  }

  @media (max-width: 992px) {
      .hero h1 {
          font-size: 2.4rem;
      }
  }

  @media (max-width: 768px) {
      .navbar .container {
          flex-wrap: wrap;
          position: relative;
      }

      .navbar-links {
          display: none;
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: #fff;
          flex-direction: column;
          padding: 16px 24px;
          gap: 4px;
          border-bottom: 1px solid var(--border);
          box-shadow: var(--shadow-md);
          z-index: 999;
      }

      .navbar-links.open {
          display: flex;
      }

      .navbar-links li a {
          padding: 12px 14px;
          font-size: 0.95rem;
          width: 100%;
      }

      .hamburger {
          display: flex;
      }

      .nav-auth {
          margin-left: auto;
      }

      .hero {
          min-height: 380px;
          padding: 60px 0 70px;
      }

      .hero h1 {
          font-size: 2rem;
          letter-spacing: -0.8px;
      }

      .hero p {
          font-size: 1rem;
      }

      .hero-badge {
          font-size: 0.75rem;
          padding: 6px 14px;
      }

      .quiz-grid {
          grid-template-columns: 1fr;
          gap: 18px;
      }

      .section-header h2 {
          font-size: 1.4rem;
      }

      .stats-grid {
          grid-template-columns: repeat(2, 1fr);
          gap: 16px;
      }

      .stat-item .stat-number {
          font-size: 1.4rem;
      }

      .user-dropdown-menu {
          position: fixed;
          top: auto;
          right: 16px;
          left: 16px;
          min-width: auto;
      }
  }

  @media (max-width: 480px) {
      .container {
          padding: 0 16px;
      }

      .navbar-brand {
          font-size: 0.95rem;
      }

      .navbar-brand .brand-icon {
          width: 34px;
          height: 34px;
          font-size: 0.9rem;
      }

      .btn-login {
          padding: 8px 14px;
          font-size: 0.8rem;
      }

      .hero h1 {
          font-size: 1.7rem;
      }

      .hero-cta .btn-hero {
          padding: 12px 20px;
          font-size: 0.9rem;
          width: 100%;
          justify-content: center;
      }

      .hero-search input {
          padding: 13px 16px 13px 42px;
          font-size: 0.9rem;
      }

      .hero-search .search-icon {
          left: 14px;
          font-size: 0.85rem;
      }

      .quiz-card-img {
          height: 130px;
      }

      .quiz-card-body {
          padding: 16px;
      }

      .how-card {
          padding: 24px 16px;
      }

      .how-card .how-icon {
          width: 52px;
          height: 52px;
          font-size: 1.2rem;
      }
  }