Here's a breakdown:
* The Dress: A simple, black, sleeveless dress with a high neck. This choice is practical, representing her life in District 12, but also elegant enough to stand out in the Capitol.
* The Mockingjay Pin: This pin, a symbol of rebellion, is hidden under her collar during the interview. It's a subtle but powerful sign of her true beliefs, only revealed to the camera at the end.
* The Hair: Her hair is styled in a braid that emphasizes her youth and vulnerability. This is a contrast to the Capitol's extravagant hairstyles and helps her appear innocent and relatable.
* The Makeup: She wears minimal makeup, again highlighting her simplicity and contrasting with the Capitol's over-the-top style.
* The Overall Effect: The costume is a powerful statement, representing Katniss's strength and defiance while also making her appear vulnerable and relatable. This helps her connect with the audience and gain their sympathy.
Remember, this is only a summary. You can find more detailed descriptions of Katniss's costume in the book and the film!