:root{--metrophopic: "Metrophobic", sans-serif;--payton: "Payton One", sans-serif;--manrope: "Manrope", sans-serif;--header-color: #D9D9D9;--second-color: #EEEEEE;--front-color: #A7A7A7;--back-color: #4E4E4E}*{margin:0;padding:0;box-sizing:border-box}main{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:20px}.title-header{text-align:center}.upload-section,.create-manually-btn,.flashcard{width:300px;border:1px solid #000;padding:20px;border-radius:10px}.card-content{height:350px;overflow-y:auto;text-align:left}.app-footer{position:fixed;left:0;bottom:0;width:100%;color:#333;text-align:center;z-index:1000}