* {
    margin: 0;
    padding: 0;
    font-family: sans-serif, serif;
}

:root {
    font-size: 16px;
    line-height: 140%;
    letter-spacing: 150%;
}

body {
    max-width: 800px;
    margin: 0 auto;
    background-color: snow;
    height: 100vh;
    position: relative;
}

header {
    background-color: rgb(26, 23, 23);
    color: #fff;
    display: flex;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
}

header img {
    width: 70px;
    border-radius: 50%;
    padding: 1rem;
}

header h1 {
    margin: 0 auto;
    padding-top: 3rem;
    padding-right: 2rem;
}

#input-div {
    text-align: center;
    margin-top: 3rem;
}

.text-input {
    width: 55%;
    height: 15vh;
    border: 3px groove greenyellow;
    text-align: left;
    font-size: 1rem;
    border-radius: 10px;
    padding: 1rem;
}

#btn {
    display: block;
    margin: 0.5rem auto;
    padding: 0.2rem;
    background-color: rgb(22, 18, 18);
    font-size: small;
    color: white;
    border-color: transparent;
    border-radius: 5px;
}

#btn:hover {
    cursor: pointer;
    background-color: yellowgreen;
}

p {
    text-align: center;
    padding: 1rem;
}

#output-div {
    width: 55%;
    height: 60px;
    margin: 0 auto;
    border: 3px groove orangered;
    border-radius: 10px;
    padding: 1rem;
}

footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
    height: 2.5rem;
    font-size: small;
    color: rgb(186, 207, 207);
}