img {
    vertical-align: top;
}

.text-center {
    text-align: center;
}
.text-right {
    text-align: right;
}

.my-3 {
    margin-top: 20px;
    margin-bottom: 20px;
}
.my-5 {
    margin-top: 40px;
    margin-bottom: 40px;
}
.py-3 {
    padding-top: 20px;
    padding-bottom: 20px;
}
.py-5 {
    padding-top: 40px;
    padding-bottom: 40px;
}

html,
body {
    background-color: #f8f9fa;
    color: #333333;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 14px;
}

.container {
    width: 95%;
    max-width: 1200px;
    margin-right: auto;
    margin-left: auto;
}

h1 {
    margin-bottom: 1em;
    text-align: center;
    font-size: 32px;
    font-weight: normal;
}

h2 {
    margin-top: 2em;
    margin-bottom: 1em;
    padding: 0.5em 1em;
    background-color: #e2e2e2;
    font-size: 18px;
    font-weight: normal;
}

h3 {
    margin-top: 2em;
    margin-bottom: 1em;
    padding-bottom: 4px;
    border-bottom: 1px solid #666666;
    font-size: 16px;
    font-weight: normal;
}

button.btn {
    -webkit-appearance: none;
    display: inline-block;
    min-width: 14em;
    padding: 0.75em 4em;
    font-size: 16px;
    line-height: 1;
    background: #e2e2e2;
    background: linear-gradient(#f0f0f0 0%, #e2e2e2 100%);
    border-width: 1px;
    border-style: solid;
    border-color: #cccccc;
    border-radius: 2em;
    text-align: center;
    text-decoration: none;
    outline: none;
    touch-action: none;
}
button.btn:hover {
    background: #f0f0f0;
}

article p {
    margin-top: 1em;
    margin-bottom: 1em;
    line-height: 1.5;
}

article ol,
article ul {
    margin: 1em 2em 1em 3em;
    line-height: 1.5;
}
article ol li,
article ul li {
    margin-top: 0.25em;
}
article ol > li > ol {
    list-style: none;
    counter-reset: number;
}
article ol > li > ol > li {
    position: relative;
}
article ol > li > ol > li::before {
    content: '(' counter(number) ')';
    counter-increment: number;
    position: absolute;
    left: -1.5em;
}

footer {
    background-color: #ffffff;
    border-top: 1px solid #e2e2e2;
}
footer ul {
    text-align: center;
}
footer ul li {
    display: inline-block;
    margin-right: 0.5em;
    margin-left: 0.5em;
}
footer ul li a {
    color: #333333;
    text-decoration: none;
}
footer ul li a:hover {
    text-decoration: underline;
}
footer address {
    font-size: smaller;
    font-style: normal;
}


@media screen and (max-width: 599px) {

    .my-3 {
        margin-top: 14px;
        margin-bottom: 14px;
    }
    .my-5 {
        margin-top: 28px;
        margin-bottom: 28px;
    }
    .py-3 {
        padding-top: 14px;
        padding-bottom: 14px;
    }
    .py-5 {
        padding-top: 28px;
        padding-bottom: 28px;
    }

    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 16px;
    }

    h3 {
        font-size: 14px;
    }

}