html {
    font-size: 10px;
}

body {
    padding: 0;
    margin: 0;
    min-height: 100vh;
    position: relative;
}

.button-back {
    position: absolute;
    right: 40px;
    bottom: 40px;
    font-size: 1.4rem;
    padding: 7px 20px;
    text-transform: uppercase;
}

.card {
    width: 70%;
    position: absolute;
    top: 50%;
    left: 50%;
    padding: 1rem;
    transform: translateX(-50%) translateY(-50%);
}

.header {
    text-align: center;
}

.description {
    font-size: 1.8rem;
}


.input-group {
    margin: 0 auto;
    width: 90%;
    display: flex;
    justify-content: space-around;
}

.string-input {
    font-size: 2rem;
    
}

.button {
    font-size: 2rem;
    padding: 7px 20px;
    text-transform: uppercase;
}

.result-group {
    width: 70%;
    margin: 10px auto 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
}

.result {
    padding: 5px;
    border-radius: 2px;
    color: #eee;
    background-color: #343a40;
    transition: background-color .4s ease-in;

}

.true {
    background-color: #198754;
    transition: all .4s ease-in;
}

.false {
    background-color: #dc3545;
    transition: all .4s ease-in;
}