* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 62.5%;
}

body {
    background-color: gainsboro;
}

.flex {
    text-align: center;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 10rem);
    width: 90%;
    margin: 0 auto;
    border-radius: 1rem;
    background: #e0e0e0;
    box-shadow: 20px 20px 60px #bebebe, -20px -20px 60px #ffffff;
    padding: 2rem 0rem;
    margin-top: 5rem;
}

.form-div {
    margin: 0rem 2rem;
}

.form-div form label {
    width: 80%;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
}

.form-div form label span {
    font-size: 2rem;
    font-family: fantasy;
    margin-top: 1rem;
}

.form-div form label select {
    font-size: 2rem;
    font-family: fantasy;
    width: 50%;
    text-align: center;
    margin-top: 1rem;
}

#input-div {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    align-content: center;
}

#input-div button {
    padding: 1rem 0rem;
    background-color: #797979;
    border: 0.1rem solid #000000;
    outline: 0;
    font-size: 1.6rem;
    margin-top: 2rem;
    color: white;
    font-family: fantasy;
    letter-spacing: 0.3rem;
    cursor: pointer;
}

#input-div label {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-content: center;
    justify-content: space-between;
    align-items: center;
    font-size: 1.6rem;
    font-family: fantasy;
    width: 80%;
    margin: 1rem auto 1rem auto;
}

#input-div label input {
    font-size: 2rem;
    font-family: fantasy;
    width: 50%;
    text-align: center;
}

.hr {
    margin: 1rem 0rem;
    width: 100%;
    height: 0.1rem;
    background-color: black;
    border: 0;
    outline: 0;
    display: none;
}

.result-div {
    font-size: 1.6rem;
    font-family: fantasy;
    text-align: left;
    letter-spacing: 0.1rem;
    width: 80%;
    margin: 0 auto;
    display: none;
}

.result-div div {
    margin: 1rem 2rem;
}

@media only screen and (max-width: 400px) {
    .form-div form label select {
        width: 100%;
    }
}

@media only screen and (max-width: 475px) {
    .form-div form label, #input-div label {
        justify-content: center;
        width: 100%;
    }
    #input-div label {
        flex-direction: column;
    }
    #input-div label input {
        width: 100%;
        margin-top: 0.5rem;
    }
}