Task Manager Interface - Copy this Html, Bootstrap Component to your project

Design a user interface for a to do list application. The interface should include a clean, minimalistic design with a focus on usability and simplicity. The top section should feature a prominent 'Login' button, allowing users to sign in easily. Below the login section, the main area of the interface should display the user's tasks in a clear and organized manner. Tasks should be listed with checkboxes next to them, allowing users to mark tasks as completed. Each task should also have options to edit or delete it. Additionally, include an input field at the bottom for users to add new tasks, accompanied by an 'Add Task' button. Ensure that the design is responsive and works well on both desktop and mobile devices. The overall color scheme should be modern and calming, with good contrast for readability.