* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: sans-serif;
    text-align: center;
    background-image: url(images/hearts.jpg);
    background-size: cover;
}

#content-box {
    background: white;
    width: 25rem;
    height: 500px;
    margin: calc(50vh - 250px) auto;
    padding: 1rem;
    border: 2px solid;
    box-shadow: 6px 6px;
    border-radius: 1rem;
    -webkit-backdrop-filter: blur(1rem);
    backdrop-filter: blur(1rem);
    backdrop-filter: blur(1rem);
}

#calculate {
    width: 50%;
    height: 50px;
    border: 2px solid black;
    border-radius: 50px;

    font-size: 1rem;
    font-weight: bold;
    transition: all .2s ease-in-out;
    box-shadow: 5px 5px #000;
}
#calculate:hover {
    background: lightcoral;
    box-shadow: none;
}
#calculate:active {
    background: rgb(255, 36, 80);
    box-shadow: none;
}

label {
    font-weight: bold;
}
input {
    border: 2px solid;
    padding: .25rem .5rem;
    font-size: 1rem;
}

p {
    font-family: 'Segoe UI', Tahoma, Geneva , Verdana, sans-serif;
    font-weight: 500;
    line-height: 1.5;
}

#result-percentage {
    line-height: 1;
    margin: 0;
    font-size: 50px;
}
.row {
    text-align-last: left;
    display: flex;
    justify-content: space-between;
    margin-block: 1rem;
}