* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .login-container {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 40px;
            width: 90%;
            max-width: 420px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(10px);
        }
        
        .logo {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .logo h1 {
            color: #333;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        
        .logo p {
            color: #666;
            font-size: 14px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            color: #333;
            font-size: 14px;
            margin-bottom: 8px;
            font-weight: 500;
        }
        
        .form-group input {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: #f8f9fa;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #667eea;
            background: #fff;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }
        
        .form-group .input-icon {
            position: relative;
        }

        .form-group .input-icon input {
            padding-left: 44px;
        }
        
        .btn-login {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
        }
        
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
        }
        
        .btn-login:active {
            transform: translateY(0);
        }
        
        .btn-login:disabled {
            opacity: 0.7;
            cursor: not-allowed;
        }
        
        .error-message {
            background: #fee;
            color: #c33;
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 20px;
            font-size: 14px;
            display: none;
        }
        
        .error-message.show {
            display: block;
            animation: shake 0.5s ease;
        }
        
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }
        
        .user-info {
            display: none;
            background: #f8f9fa;
            padding: 15px;
            border-radius: 10px;
            margin-top: 20px;
            text-align: center;
        }
        
        .user-info.show {
            display: block;
        }
        
        .user-info .name {
            font-size: 16px;
            font-weight: 600;
            color: #333;
        }
        
        .user-info .role {
            font-size: 13px;
            color: #666;
            margin-top: 5px;
        }
        
        .user-info .logout {
            margin-top: 15px;
            padding: 10px 20px;
            background: #e0e0e0;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            color: #333;
            transition: all 0.3s;
        }
        
        .user-info .logout:hover {
            background: #d0d0d0;
        }