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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-container {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
            width: 100%;
            max-width: 450px;
            overflow: hidden;
        }

        .login-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 2rem;
            text-align: center;
        }

        .login-header h1 {
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }

        .login-header p {
            opacity: 0.9;
            font-size: 1rem;
        }

        .login-form {
            padding: 2rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
            position: relative;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #333;
        }

        .form-group input {
            width: 100%;
            padding: 1rem;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 1rem;
            transition: all 0.3s ease;
            background-color: white;
        }

        .form-group input:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .form-group input.error {
            border-color: #dc3545;
            box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
        }

        .form-group input.success {
            border-color: #28a745;
            box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
        }

        .input-feedback {
            font-size: 0.875rem;
            margin-top: 0.5rem;
            padding-left: 0.5rem;
            min-height: 1.2rem;
        }

        .input-feedback.error {
            color: #dc3545;
        }

        .input-feedback.success {
            color: #28a745;
        }

        .password-toggle {
            position: absolute;
            right: 1rem;
            top: 3.2rem;
            background: none;
            border: none;
            cursor: pointer;
            color: #666;
            font-size: 1.2rem;
            padding: 0.25rem;
            user-select: none;
        }

        .password-toggle:hover {
            color: #333;
        }

        .btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.3s ease;
            width: 100%;
            margin-bottom: 1rem;
        }

        .btn:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary {
            background: #6c757d;
        }

        .btn-secondary:hover {
            box-shadow: 0 10px 20px rgba(108, 117, 125, 0.3);
        }

        .alert {
            padding: 1rem;
            margin-bottom: 1rem;
            border-radius: 10px;
            display: none;
            position: relative;
        }

        .alert-success {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        .alert-danger {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .alert-warning {
            background: #fff3cd;
            color: #856404;
            border: 1px solid #ffeaa7;
        }

        .alert-info {
            background: #d1ecf1;
            color: #0c5460;
            border: 1px solid #bee5eb;
        }

        .alert-close {
            position: absolute;
            top: 0.5rem;
            right: 1rem;
            background: none;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            opacity: 0.6;
        }

        .alert-close:hover {
            opacity: 1;
        }

        .loading {
            display: none;
            text-align: center;
            padding: 1rem;
        }

        .spinner {
            display: inline-block;
            width: 30px;
            height: 30px;
            border: 3px solid #f3f3f3;
            border-radius: 50%;
            border-top: 3px solid #667eea;
            animation: spin 1s linear infinite;
        }

        .security-notice {
            background: #f8f9fa;
            border: 1px solid #dee2e6;
            padding: 1rem;
            border-radius: 8px;
            font-size: 0.85rem;
            color: #6c757d;
            margin-top: 1rem;
            text-align: center;
        }

        .login-attempts {
            background: #fff3cd;
            border: 1px solid #ffeaa7;
            color: #856404;
            padding: 0.75rem;
            border-radius: 8px;
            font-size: 0.85rem;
            margin-bottom: 1rem;
            display: none;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-5px); }
            75% { transform: translateX(5px); }
        }

        .shake {
            animation: shake 0.5s ease-in-out;
        }

        @media (max-width: 480px) {
            .login-container {
                margin: 10px;
            }
            
            .login-header, .login-form {
                padding: 1.5rem;
            }
        }