/* ---------------------------------------------
*   Universal selector
--------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* ---------------------------------------------
*   html, body
--------------------------------------------- */
html,
body,
header,
footer {
    color: #333;
    font-size: 16px;
    font-family: noto-sans-cjk-jp, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
}
@media screen and (max-width: 768px) {
    html,
    body,
    header,
    footer {
        font-size: 4.2666666667vw;
    }
}

body,
header,
footer {
    line-height: 1.5;
    letter-spacing: 0.06em;
}
@media screen and (max-width: 768px) {
    body,
    header,
    footer {
        line-height: 1.5;
        min-width: 320px;
    }
}

/* ---------------------------------------------
*   <a> tag
--------------------------------------------- */
a {
    color: inherit;
    text-decoration: none;
    outline: none;
}

/* ---------------------------------------------
*   <img> tag
--------------------------------------------- */
img {
    max-width: 100%;
    vertical-align: bottom;
}

/* ---------------------------------------------
*   button
--------------------------------------------- */
button {
    color: #333;
}

/* ---------------------------------------------
*   <hr> tag as anchor target
--------------------------------------------- */
hr[id^=anchor-] {
    display: block;
    width: auto;
    height: 0;
    padding: 60px 0 0 0;
    border: 0;
    margin: -60px 0 0 0;
    background: 0;
    pointer-events: none;
}
@media screen and (max-width: 768px) {
    hr[id^=anchor-] {
        padding-top: 70px;
        margin-top: -70px;
    }
}