/* ---------------------------------------------
*   Custom Properties
--------------------------------------------- */
:root {
    --design-width: 1350;
    --contents-width: 1000;
    --contents-side-padding: 10;
    --minwidth: calc(var(--contents-width) + var(--contents-side-padding) * 2);
    --fixed-header-height: 77;
    --root-fz: 16;
    --line-height: 1.5;
    --hover-opacity-ratio: 0.6;
    --hover-duration: .3s;
    --color-base-1: #333333;
    --color-base-1-rgb: 51, 51, 51;
    --color-main-1: #0054a4;
    --color-main-1-rgb: 0, 84, 164;
    --color-main-2: #7abce7;
    --color-main-2-rgb: 122, 188, 231;
    --color-main-3: #0089cc;
    --color-main-3-rgb: 0, 137, 204;
    --color-black-1: #000;
    --color-black-1-rgb: 0, 0, 0;
    --color-black-2: #111;
    --color-black-2-rgb: 17, 17, 17;
    --color-black-3: #66676b;
    --color-black-3-rgb: 102, 103, 107;
    --color-white-1: #fff;
    --color-white-1-rgb: 255, 255, 255;
    --color-white-2: #fefefe;
    --color-white-2-rgb: 254, 254, 254;
    --color-white-3: #F3FAFF;
    --color-white-3-rgb: 243, 250, 255;
    --color-gray-1: #c2c2c4;
    --color-gray-1-rgb: 194, 194, 196;
    --color-gray-2: #9d9d9d;
    --color-gray-2-rgb: 157, 157, 157;
    --color-gray-3: #858585;
    --color-gray-3-rgb: 133, 133, 133;
    --color-gray-4: #d1d1d3;
    --color-gray-4-rgb: 209, 209, 211;
    --color-gray-5: #919191;
    --color-gray-5-rgb: 145, 145, 145;
    --color-gray-6: #b1cae4;
    --color-gray-6-rgb: 177, 202, 228;
    --color-gray-7: #6c8299;
    --color-gray-7-rgb: 108, 130, 153;
    --ff-root: "Noto Sans JP", sans-serif;
    --ff-montserrat: "Montserrat", sans-serif;
    --ff-hansans: "Source Han Sans JP", sans-serif;
}
@media screen and (max-width: 780px) {
    :root {
        --design-width: 390;
        --contents-width: 365;
        --contents-side-padding: 15;
        --minwidth: 320;
        --fixed-header-height: 60;
        --root-fz: 32;
        --line-height: 1.5;
    }
}

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

/* ---------------------------------------------
*   html, body
--------------------------------------------- */
html,
body {
    color: var(--color-base-1);
    font-size: calc(var(--root-fz) * 1px);
    font-family: var(--ff-root);
    -webkit-text-size-adjust: 100%;
}
@media screen and (max-width: 780px) {
    html,
    body {
        font-size: calc(var(--root-fz) / var(--design-width) * 100vw);
    }
}

body {
    line-height: var(--line-height);
}

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

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

/* ---------------------------------------------
*   <hr> tag as anchor target
--------------------------------------------- */
hr[id^=anchor-] {
    display: block;
    width: auto;
    height: 0;
    padding: var(--fixed-header-height) 0 0 0;
    border: 0;
    margin: var(--fixed-header-height) 0 0 0;
    background: 0;
    pointer-events: none;
}