html {
    height: 100%;
}

body {
    font-family: 'Zen Maru Gothic';
    height: 100%;
    margin: 0;
    color: #000000;
}

header{
    font-family: 'Mochiy Pop One';
    text-align: center;
    background-image: url(img/background.jpg);
    background-size: cover;
    height: 427px;
    text-align: center;
    font-size: 54px;
    
    padding-top: 150px;
    color: #cccc99;
}

.introduction {
    background-color: #cce9f0;
}

.title {
    border-left-style: solid;
    margin-left: 40px;
    padding-left: 20px;
    border-width: 10px;
    font-size: 32px;
}

.main{
    border-style: solid;
    border-width: 10px;
    border-color: #336666;
    margin: 10px;
    margin-left: 50px;
    margin-right: 50px;
    padding: 10px;
    border-radius: 10px;
    font-size: 20px;
    width: fit-content;
}

.hide{
    padding-top: 20px;
    padding-left: 70px;
    font-size: 10px;
}

.howToUse{
    background-image: url(img/calculator.jpg);
    background-size: cover;
}

.main-h{
    margin: 10px;
    margin-left: 70px;
    margin-right: 70px;
    font-size: 20px;
    background-color:aliceblue;
    width: fit-content;
}

input[readonly]{
    background-color: gainsboro;
}
input[type=number]{
    width: 30%;
}

input{
    height: 50px;
    font-size: 30px;
}

.use{
    background-color: #aaffdd;
}

.using{
    margin: 10px;
    margin-left: 70px;
}

.footer{
    text-align: center;
}