index.css

body {
    margin: 0;
    text-align: center;
    width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-family: 'Inter', sans-serif;
}

input {
    display: block;
    margin-right: auto;
    margin-left: auto;
    width: 125px;
    border: 2px solid #B295FF;
    border-radius: 5px;
    background: #6943FF;
    color: white;
    text-align: center;
    font-size: 50px;
    font-weight: bold;
    padding: 15px 15px;
}

button {
    background: #F4F4F4;
    border: none;
    border-radius: 5px;
    color: #3D3D3D;
    margin-top: 20px;
    padding: 15px 35px;
}

#entryContainer {
    background: #6943FF;
    color: white;
    margin: 0;
    padding: 20px 20px;
}

#outputContainer {
    background: #F4F4F4;
    color: #5A537B;
    margin: 0;
    padding: 15px 10px;
}

.container {
    background: white;
    margin: 20px 5px;
    padding: 20px 10px;
}