:root {
      --primary-color: #4361ee;
      --primary-hover: #3a56d4;
      --secondary-color: #f8f9fc;
      --accent-color: #7209b7;
      --text-color: #2b2d42;
      --light-text: #8d99ae;
      --google-red: #DB4437;
      --facebook-blue: #1877f2;
      --twitter-blue: #1DA1F2;
      --card-bg: #ffffff;
      --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }
    
    body {
      background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
      font-family: 'Cairo', sans-serif;
      color: var(--text-color);
      min-height: 100vh;
      padding-bottom: 2rem;
    }
    
    .header {
      background-color: rgba(255, 255, 255, 0.95);
      padding: 1rem 2rem;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }
    
    .header .logo-area {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    
    .header img {
      height: 2.5rem;
      transition: var(--transition);
    }
    
    .header .platform-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 0;
      background: linear-gradient(to right, var(--primary-color), var(--accent-color));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    
    .header .contact-btn {
      background: linear-gradient(to right, var(--primary-color), var(--accent-color));
      color: #fff;
      border: none;
      padding: 0.5rem 1.25rem;
      border-radius: 50px;
      text-decoration: none;
      transition: var(--transition);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
    }
    
    .header .contact-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
    }
    
    .main-container {
      max-width: 1200px;
      margin: 2rem auto;
      padding: 0 1.5rem;
    }
    
    .register-card {
      background: var(--card-bg);
      border-radius: 16px;
      box-shadow: var(--card-shadow);
      overflow: hidden;
      transition: var(--transition);
      border: none;
    }
    
    .register-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.15);
    }
    
    .card-header {
      background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
      color: white;
      padding: 1.5rem;
      text-align: center;
      border-bottom: none;
    }
    
    .card-title {
      font-weight: 800;
      font-size: 1.75rem;
      margin-bottom: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.75rem;
    }
    
    .card-body {
      padding: 2.5rem;
    }
    
    .form-label {
      font-weight: 600;
      margin-bottom: 0.5rem;
      color: var(--text-color);
      font-size: 0.95rem;
    }
    
    .form-control, .form-select {
      padding: 0.75rem 1.25rem;
      border-radius: 12px;
      border: 1px solid #e9ecef;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    
    .form-control:focus, .form-select:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.15);
    }
    
    .input-group-text {
      background-color: #f8f9fa;
      border-radius: 12px 0 0 12px !important;
      border: 1px solid #e9ecef;
      color: var(--light-text);
    }
    
    .btn-primary {
      background: linear-gradient(to right, var(--primary-color), var(--accent-color));
      border: none;
      padding: 0.85rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      transition: var(--transition);
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
    }
    
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 25px rgba(67, 97, 238, 0.4);
    }
    
    .social-divider {
      display: flex;
      align-items: center;
      margin: 1.5rem 0;
      color: black;
      font-size: 1.9rem;
      padding: 0.85rem;
      letter-spacing: 0.5px;
      transition: var(--transition);
      border-radius: 12px;
      
    }
    
    .social-divider::before,
    .social-divider::after {
      content: "";
      flex: 1;
      border-bottom: 1px solid #e9ecef;
      margin: 0 10px;
    }
    
    .social-login-buttons {
      display: flex;
      justify-content: center;
      gap: 1rem;
      margin-bottom: 1.5rem;
    }
    
    .social-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.6rem 1.25rem;
      border-radius: 12px;
      text-decoration: none;
      color: white;
      font-weight: 600;
      transition: var(--transition);
      min-width: 110px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .social-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    }
    
    .social-btn i {
      margin-left: 8px;
      font-size: 1.1rem;
    }
    
    .btn-google {
      background-color: var(--google-red);
    }
    
    .btn-facebook {
      background-color: var(--facebook-blue);
    }
    
    .btn-twitter {
      background-color: var(--twitter-blue);
    }
    
    .auth-footer {
      text-align: center;
      margin-top: 1.5rem;
      color: var(--light-text);
      font-size: 0.95rem;
    }
    
    .form-check-input {
      border-radius: 6px;
      border: 1px solid #dee2e6;
      margin-top: 0.2rem;
    }
    
    .form-check-input:checked {
      background-color: var(--primary-color);
      border-color: var(--primary-color);
    }
    
    .toggle-password {
      border-radius: 0 12px 12px 0 !important;
      border: 1px solid #e9ecef;
      border-right: none;
      background-color: #f8f9fa;
      color: var(--light-text);
      transition: var(--transition);
    }
    
    .toggle-password:hover {
      background-color: #e9ecef;
      color: var(--text-color);
    }
    
    @media (max-width: 768px) {
      .card-body {
        padding: 1.75rem;
      }
      
      .social-login-buttons {
        flex-wrap: wrap;
      }
    }
    
    @media (max-width: 576px) {
      .card-body {
        padding: 1.5rem;
      }
      
      .social-login-buttons {
        flex-direction: column;
      }
    }