:root {
      --primary-color: #6366f1;
      --primary-light: #818cf8;
      --primary-dark: #4f46e5;
      --secondary-color: #10b981;
      --text-color: #1f2937;
      --text-light: #6b7280;
      --bg-light: #f9fafb;
      --card-bg: rgba(255, 255, 255, 0.95);
      --card-shadow: 0 10px 30px rgba(31, 38, 135, 0.1);
      --sidebar-bg: rgba(255, 255, 255, 0.95);
      --navbar-bg: rgba(255, 255, 255, 0.98);
      --footer-bg: #1f2937;
      --transition: all 0.3s ease;
      --border-radius: 12px;
      --glass-border: 1px solid rgba(255, 255, 255, 0.18);
    }

    .dark-mode {
      --primary-color: #818cf8;
      --primary-light: #a5b4fc;
      --primary-dark: #6366f1;
      --text-color: #f3f4f6;
      --text-light: #d1d5db;
      --bg-light: #111827;
      --card-bg: rgba(30, 41, 59, 0.95);
      --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
      --sidebar-bg: rgba(17, 24, 39, 0.95);
      --navbar-bg: rgba(17, 24, 39, 0.98);
      --footer-bg: #0f172a;
      --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    body {
      font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
      background: var(--bg-light);
      color: var(--text-color);
      line-height: 1.6;
      transition: var(--transition);
      background-image: 
        radial-gradient(at 47% 33%, rgba(150, 150, 255, 0.1) 0, transparent 59%), 
        radial-gradient(at 82% 65%, rgba(100, 200, 200, 0.1) 0, transparent 55%);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* Navigation */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background: var(--navbar-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      display: flex;
      align-items: center;
      min-height: 70px;
      z-index: 1002;
      padding: 0 5%;
      box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
      border-bottom: var(--glass-border);
    }

    .navbar a, .navbar button {
      color: var(--text-color);
      padding: 12px 16px;
      text-decoration: none;
      transition: var(--transition);
      background: none;
      border: none;
      font-size: 1em;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .navbar a.logo {
      font-weight: 700;
      font-size: 1.8em;
      letter-spacing: 0.5px;
      color: var(--primary-color);
    }

    .navbar a:hover, .navbar button:hover {
      color: var(--primary-color);
    }

    .navbar .icon {
      display: none;
      font-size: 1.4em;
    }

    .notif-btn {
      margin-left: auto;
      position: relative;
    }

    #notifBadge {
      background: #ef4444;
      border-radius: 50%;
      color: #fff;
      font-size: 0.7em;
      padding: 3px 7px;
      position: absolute;
      top: 2px;
      right: 2px;
      font-weight: 600;
    }

    /* Sidebar */
    .sidebar {
      background: var(--sidebar-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      width: 260px;
      position: fixed;
      top: 70px;
      left: 0;
      height: calc(100vh - 70px);
      padding-top: 20px;
      z-index: 1001;
      display: flex;
      flex-direction: column;
      transition: transform 0.3s ease;
      border-right: var(--glass-border);
      box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    }

    .sidebar-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 20px 15px;
      border-bottom: 1px solid rgba(128, 128, 128, 0.2);
      font-weight: 600;
      color: var(--primary-color);
    }

    .sidebar .close-btn {
      font-size: 1.2em;
      border: none;
      background: none;
      color: var(--text-color);
      cursor: pointer;
    }

    .sidebar a, .sidebar button {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 20px;
      color: var(--text-color);
      text-align: left;
      background: none;
      border: none;
      font-size: 1em;
      transition: var(--transition);
      cursor: pointer;
    }

    .sidebar a:hover, .sidebar button:hover {
      background: rgba(var(--primary-color-rgb), 0.1);
      color: var(--primary-color);
      padding-left: 25px;
    }

    .theme-btn {
      margin: 15px 20px;
      border-radius: 8px;
      border: 1px solid rgba(128, 128, 128, 0.2);
    }

    .overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.5);
      z-index: 1000;
    }

    /* Main Content */
    .content {
      margin-left: 260px;
      padding: 100px 5% 40px;
      transition: var(--transition);
    }

h1 {
  font-size: 2.5em;
  margin-bottom: 30px;
  font-weight: 700;
  text-align: left;
  position: relative;
  padding-bottom: 15px;

  /* Gradient text effect */
  background: linear-gradient(90deg, #6366f1, hsl(340, 98%, 47%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;

  /* Smooth animation */
  animation: fadeIn 1.2s ease-in-out;
}

    h1:after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--primary-color);
      border-radius: 2px;
    }

    /* Product Section */
    .product-section {
      width: 100%;
      margin: 0 auto;
      padding: 20px 0;
    }

    #search-container {
      margin: 2em 0;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    #search-container input {
      background-color: transparent;
      flex: 1;
      min-width: 250px;
      border: 2px solid var(--text-light);
      padding: 12px 16px;
      border-radius: var(--border-radius);
      color: var(--text-color);
      transition: var(--transition);
    }

    #search-container input:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    }

    #search {
      padding: 12px 24px;
      background-color: var(--primary-color);
      color: white;
      border: none;
      border-radius: var(--border-radius);
      cursor: pointer;
      transition: var(--transition);
    }

    #search:hover {
      background-color: var(--primary-dark);
    }

    #buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 30px;
    }

    .button-value {
      border: 2px solid var(--primary-color);
      padding: 10px 20px;
      border-radius: 30px;
      background-color: transparent;
      color: var(--primary-color);
      cursor: pointer;
      transition: var(--transition);
    }

    .button-value:hover, .button-value.active {
      background-color: var(--primary-color);
      color: #fff;
    }

    /* Products Grid - 4 cards per row */
    #products {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 25px;
      padding: 2em 0;
    }

    .card {
      background-color: var(--card-bg);
      border-radius: var(--border-radius);
      overflow: hidden;
      transition: var(--transition);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    }

    .image-container {
      height: 200px;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #f5f7ff;
    }

    .card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .card:hover img {
      transform: scale(1.05);
    }

    .container {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .container h5 {
      font-weight: 600;
      font-size: 1.1em;
      margin-bottom: 8px;
      color: var(--text-color);
    }

    .container h6 {
      color: var(--primary-color);
      font-size: 1.2em;
      margin: 10px 0;
    }

    .container p {
      color: var(--text-light);
      font-size: 0.9em;
      margin-bottom: 15px;
      flex-grow: 1;
    }

    .add-to-cart {
      background: var(--primary-color);
      color: white;
      border: none;
      padding: 10px 15px;
      border-radius: 6px;
      cursor: pointer;
      transition: var(--transition);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      margin-top: auto;
    }

    .add-to-cart:hover {
      background: var(--primary-dark);
    }

    .hide {
      display: none;
    }

    /* Notification Popup */
    .notif-popup {
      display: none;
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      color: var(--text-color);
      position: fixed;
      right: 25px;
      top: 90px;
      border-radius: var(--border-radius);
      padding: 16px 20px;
      box-shadow: var(--card-shadow);
      z-index: 1005;
      animation: slideIn 0.4s ease;
      border: var(--glass-border);
      max-width: 320px;
    }

    @keyframes slideIn {
      0% {
        opacity: 0;
        transform: translateX(100px);
      }
      100% {
        opacity: 1;
        transform: translateX(0);
      }
    }

    .notif-popup .closeNot {
      position: absolute;
      top: 10px;
      right: 12px;
      cursor: pointer;
      font-size: 1.2em;
      color: var(--text-light);
      transition: var(--transition);
    }

    .notif-popup .closeNot:hover {
      color: var(--primary-color);
    }

    /* Footer */
    .footer {
      background: var(--footer-bg);
      color: #fff;
      padding: 40px 5% 30px;
      margin-top: auto;
      margin-left: 260px;
    }

    .footer-inner {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 30px;
    }

    .footer p {
      color: #e5e7eb;
    }

    .footer a {
      color: #a5b4fc;
      margin: 0 8px;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer a:hover {
      color: var(--primary-light);
    }

    .footer form {
      display: flex;
      flex-direction: column;
      gap: 10px;
      min-width: 280px;
    }

    .footer label {
      color: #e5e7eb;
      font-size: 0.9em;
    }

    .footer input[type="email"] {
      padding: 10px 12px;
      border: none;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.1);
      color: white;
    }

    .footer input[type="email"]::placeholder {
      color: #9ca3af;
    }

    .footer button {
      background: var(--primary-color);
      color: #fff;
      border: none;
      padding: 10px 16px;
      border-radius: 6px;
      cursor: pointer;
      transition: var(--transition);
      font-weight: 500;
    }

    .footer button:hover {
      background: var(--primary-dark);
    }

    .footer .social {
      display: flex;
      gap: 15px;
    }

    .footer .social a {
      color: #fff;
      font-size: 1.4em;
      transition: var(--transition);
    }

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

    /* Modal Login */
    .modal {
      display: none;
      position: fixed;
      z-index: 1006;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(5px);
      -webkit-backdrop-filter: blur(5px);
    }

    .modal-content {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      margin: 100px auto;
      padding: 30px;
      border-radius: var(--border-radius);
      width: 90%;
      max-width: 400px;
      position: relative;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
      border: var(--glass-border);
      animation: modalFade 0.3s ease;
    }

    @keyframes modalFade {
      from {
        opacity: 0;
        transform: translateY(-50px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .close-modal {
      position: absolute;
      top: 15px;
      right: 20px;
      font-size: 1.5em;
      color: var(--text-light);
      cursor: pointer;
      transition: var(--transition);
    }

    .close-modal:hover {
      color: var(--primary-color);
    }

    .modal-content h2 {
      margin-bottom: 20px;
      color: var(--text-color);
      text-align: center;
    }

    .modal-content input[type="email"],
    .modal-content input[type="password"] {
      width: 100%;
      margin: 8px 0;
      padding: 12px 15px;
      border-radius: 8px;
      border: 1px solid rgba(128, 128, 128, 0.3);
      background: rgba(255, 255, 255, 0.1);
      color: var(--text-color);
      transition: var(--transition);
    }

    .modal-content input:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    }

    .modal-content button[type="submit"] {
      background: var(--primary-color);
      color: #fff;
      border: none;
      padding: 12px;
      margin-top: 15px;
      border-radius: 8px;
      cursor: pointer;
      width: 100%;
      font-weight: 600;
      transition: var(--transition);
    }

    .modal-content button[type="submit"]:hover {
      background: var(--primary-dark);
    }

    .modal-content .social-login {
      margin-top: 20px;
      text-align: center;
    }

    .modal-content .social-login span {
      display: block;
      margin-bottom: 10px;
      color: var(--text-light);
      font-size: 0.9em;
    }

    .modal-content .social-login .social-buttons {
      display: flex;
      justify-content: center;
      gap: 10px;
    }

    .modal-content .social-login button {
      background: #fff;
      border: 1px solid #e5e7eb;
      color: #4b5563;
      border-radius: 8px;
      padding: 8px 15px;
      cursor: pointer;
      transition: var(--transition);
    }

    .modal-content .social-login button:hover {
      background: #f9fafb;
      transform: translateY(-2px);
    }

    /* Responsive Design */
    @media (max-width: 1200px) {
      #products {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 900px) {
      .sidebar {
        width: 220px;
      }
      
      .content {
        margin-left: 220px;
        padding: 90px 4% 30px;
      }
      
      #products {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .navbar a:not(.logo):not(.icon) {
        display: none;
      }
      
      .navbar a.icon {
        display: block;
        margin-left: auto;
      }
      
      .navbar.responsive {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 5%;
      }
      
      .navbar.responsive a:not(.logo) {
        display: block;
        width: 100%;
        padding: 10px 15px;
      }
      
      .navbar.responsive .notif-btn {
        margin-left: 0;
        width: 100%;
        text-align: left;
      }
      
      .sidebar {
        width: 75vw;
        max-width: 280px;
        transform: translateX(-100%);
      }
      
      .sidebar.active {
        transform: translateX(0);
      }
      
      .overlay {
        display: block;
      }
      
      .content {
        margin-left: 0;
        padding: 90px 4% 30px;
      }
      
      .footer-inner {
        flex-direction: column;
        text-align: center;
        gap: 25px;
      }
      
      .footer form {
        width: 100%;
        max-width: 400px;
      }
      
      .footer {
        margin-left: 0;
      }
      
      #products {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
      }
    }

    @media (max-width: 480px) {
      h1 {
        font-size: 1.8em;
      }
      
      .modal-content {
        padding: 20px;
        width: 95%;
      }
      
      #search-container {
        flex-direction: column;
      }
      
      #search-container input {
        min-width: 100%;
      }
    }

    /* Utility Classes */
    .text-center {
      text-align: center;
    }

    .mt-20 {
      margin-top: 20px;
    }

    .mb-20 {
      margin-bottom: 20px;
    }