:root {
      --primary-color: #4361ee;
      --secondary-color: #3f37c9;
      --accent-color: #4895ef;
      --dark-color: #1a1a2e;
      --light-color: #f8f9fa;
    }
    
    body {
      background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
      min-height: 100vh;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    
    .login-container {
      max-width: 420px;
      margin: 80px auto;
      padding: 40px;
      background: white;
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
      transition: all 0.3s ease;
    }
    
    .login-container:hover {
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    }
    
    .login-header {
      text-align: center;
      margin-bottom: 30px;
    }
    
    .login-header i {
      font-size: 2.5rem;
      color: var(--primary-color);
      margin-bottom: 15px;
    }
    
    .login-header h3 {
      color: var(--dark-color);
      font-weight: 600;
    }
    
    .form-control {
      height: 50px;
      border-radius: 8px;
      border: 1px solid #e0e0e0;
      padding-left: 15px;
      transition: all 0.3s;
    }
    
    .form-control:focus {
      border-color: var(--accent-color);
      box-shadow: 0 0 0 0.25rem rgba(72, 149, 239, 0.25);
    }
    
    .btn-login {
      background: var(--primary-color);
      border: none;
      height: 50px;
      border-radius: 8px;
      font-weight: 600;
      letter-spacing: 0.5px;
      transition: all 0.3s;
    }
    
    .btn-login:hover {
      background: var(--secondary-color);
      transform: translateY(-2px);
    }
    
    .footer-text {
      text-align: center;
      margin-top: 20px;
      color: #6c757d;
      font-size: 0.9rem;
    }
    
    @media (max-width: 576px) {
      .login-container {
        margin: 40px 20px;
        padding: 30px 20px;
      }
    }