Challenge: Fix a Broken Layout

You are given three cards. Update the layout using the following requirements. Each card should:

• Have a width of 200px.
• Have 20px internal spacing.
• Have 15px space between cards.
• Have a border that is 2 pixels wide, with a solid style and gray color.
• Keep the declared width unchanged even after adding padding and border.

• Use the width property to define the element's width.
• Use padding for internal spacing.
• Use margin to create space between cards.
• Use border: 2px solid gray to add the border.
• Use box-sizing: border-box to prevent padding and border from increasing the total width.