:root {
    --main-color:#2e5aa0;
    --sub-color:#4a7bc8;
    --text-color: #333;
    --clear-color: #fff;
}

*,
*::before,
*::after{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:focus:not(:focus-visible) {
    outline: 0;
    /* キーボード操作"以外"でフォーカスされた際はoutlineを消す */
}

::selection {
    color: var(--clear-color);
    background: var(--sub-color);
}

html {
    font-size: clamp(14px, 1vw, 18px);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
@media (min-width: 1600px){
    html {
        font-size: clamp(12px, 0.8vw, 16px);
    }
}
@media (min-width: 481px) and (max-width: 768px){
    html {
        font-size: clamp(14px, 1.25vw, 18px);
    }
}
@media (max-width: 480px){
    html {
        font-size: clamp(14px, 1.5vw, 18px);
    }
}
@media (min-resolution: 2dppx) and (max-width: 480px){
    html {
        font-size: clamp(16px, 2vw, 20px);
    }
}

body{
    font-family: "游明朝", "Yu Mincho", YuMincho, "Hiragino Mincho Pro", serif;
    color: var(--text-color);
    font-weight: 400;
    letter-spacing: .1rem;
    line-height: 1.8;
    overflow-x: hidden;
}

ul,ol,li{
    list-style-type: none;
}
img{
    max-width: 100%;
    height: auto;
    vertical-align: bottom;
}
a{
    text-decoration: none;
    display: block;
}

header{
    section{
        width: clamp(48rem, 90%, 68.75rem);
        margin: 0 auto;
        padding: 3rem 0;
        h1{
            font-size: 1.5rem;
            line-height: 1.2;
            color: var(--main-color);
        }
    }
}
@media (max-width: 767px){
    header{
        section{
            width: 90%;
            padding: 2rem 0;
            h1{
                font-size: 1.1rem;
            }
        }
    }
}

footer {
    background: #1a1a1a;
    color: var(--clear-color);
    section{
        width: clamp(48rem, 90%, 68.75rem);
        margin: 0 auto;
        padding: 3rem 0;
        .footer-info{
            margin-bottom: 2rem;
                h3 {
                font-size: 1.5rem;
                margin-bottom: 1.5rem;
            }
        }
        .footer-contact{
            margin-bottom: 2rem;
            h4 {
                font-size: 1.3rem;
                margin-bottom: 1rem;
            }
            address{
                font-style: normal;
                span{
                    display: block;
                }
                a{
                    color: var(--clear-color);
                }
            }
        }
        .copyright{
            text-align: center;
        }
    }
}
@media (max-width: 767px){
    footer {
        section{
            width: 90%;
            padding: 2rem 0;
            .footer-info{
                    h3 {
                    font-size: 1.25rem;
                }
            }
            .footer-contact{
                h4 {
                    font-size: 1rem;
                }
            }
        }
    }
}