* {
      box-sizing: border-box;
    }
    
    body {
      background: linear-gradient(135deg, #004aad, #d90429);
      color: #fff;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      margin: 0;
    }
    
    .card {
      border: none;
      border-radius: 1rem;
      background: transparent;
      width: 100%;
      max-width: 500px;
    }
    
    .card-body {
      background: rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-radius: 1rem;
      padding: 2rem;
      color: #fff;
    }
    
    .logo {
      display: block;
      margin: 0 auto 1rem auto;
      width: 80px;
      height: auto;
      max-width: 100%;
    }
    
    h3 {
      font-size: clamp(1.5rem, 4vw, 2rem);
    }
    
    .btn-success {
      background-color: #d90429;
      border: none;
      padding: 0.75rem;
      font-size: 1rem;
    }
    
    .btn-success:hover {
      background-color: #a5031f;
    }
    
    .form-label {
      color: #fff;
      font-size: clamp(0.875rem, 2vw, 1rem);
    }
    
    .form-control {
      background: transparent !important;
      border: none;
      border-bottom: 2px solid #fff;
      border-radius: 0;
      color: #fff;
      padding: 0.5rem 0.25rem;
      font-size: clamp(0.875rem, 2vw, 1rem);
    }
    
    .form-control:focus {
      box-shadow: none;
      border-bottom: 2px solid #ffd700;
    }
    
    .form-control::placeholder {
      color: rgba(255, 255, 255, 0.7);
    }
    
    .input-group-text {
      background: transparent;
      border: none;
      border-bottom: 2px solid #fff;
      color: #fff;
      cursor: pointer;
      padding: 0.5rem 0.75rem;
    }
    
    .input-group-text:hover {
      color: #ffd700;
    }
    
    .register-text {
      font-size: clamp(0.875rem, 2vw, 1rem);
    }
    
    /* Mobile-specific styles */
    @media (max-width: 576px) {
      body {
        padding: 0.5rem;
      }
      
      .card-body {
        padding: 1.5rem 1rem;
      }
      
      .logo {
        width: 60px;
      }
      
      .mb-3 {
        margin-bottom: 1rem !important;
      }
      
      .btn-success {
        padding: 0.65rem;
        font-size: 0.95rem;
      }
    }
    
    /* Tablet styles */
    @media (min-width: 577px) and (max-width: 768px) {
      .card {
        max-width: 450px;
      }
      
      .logo {
        width: 70px;
      }
    }
    
    /* Small desktop and large tablet */
    @media (min-width: 769px) and (max-width: 992px) {
      .card {
        max-width: 480px;
      }
    }
    
    /* Extra small devices (landscape phones) */
    @media (max-height: 600px) and (orientation: landscape) {
      body {
        padding: 0.5rem;
      }
      
      .card-body {
        padding: 1rem;
      }
      
      .logo {
        width: 50px;
        margin-bottom: 0.5rem;
      }
      
      h3 {
        margin-bottom: 1rem !important;
        font-size: 1.5rem;
      }
      
      .mb-3 {
        margin-bottom: 0.75rem !important;
      }
    }