* {
            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%);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            direction: rtl;
        }
        
        .login-container {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 400px;
            text-align: center;
        }
        
        .login-header {
            margin-bottom: 2rem;
        }
        
        .login-header h1 {
            color: #333;
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }
        
        .login-header p {
            color: #666;
            font-size: 0.9rem;
        }
        
        .form-group {
            margin-bottom: 1.5rem;
            text-align: right;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #333;
            font-weight: 600;
        }
        
        .form-group input {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e1e1e1;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #667eea;
        }
        
        .login-btn {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease;
        }
        
        .login-btn:hover {
            transform: translateY(-2px);
        }
        
        .login-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }
        
        .error-message {
            background: #fee;
            color: #c33;
            padding: 10px;
            border-radius: 5px;
            margin-top: 1rem;
            display: none;
        }
        
        .loading {
            display: none;
            margin-top: 1rem;
            color: #667eea;
        }
        
        .form-icon {
            position: relative;
        }
        
        .form-icon::before {
            content: '🔒';
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.2rem;
        }
        
        .username-icon::before {
            content: '👤';
        }