/* ---------------------------------------------
*   Custom Properties
--------------------------------------------- */
:root {
    --design-width: 375;
    --contents-width: 375;
    --contents-side-padding: 10;
    --minwidth: 320;
    --root-fz: 32;
    --line-height: 1.5;
    --hover-opacity-ratio: 0.8;
    --hover-duration: .3s;
    --color-base-1: #E5740E;
    --color-base-1-rgb: 229, 116, 14;
    --color-black-1: #000;
    --color-black-1-rgb: 0, 0, 0;
    --color-black-2: #382B20;
    --color-black-2-rgb: 56, 43, 32;
    --color-black-3: #2E0B0E;
    --color-black-3-rgb: 46, 11, 14;
    --color-white-1: #fff;
    --color-white-1-rgb: 255, 255, 255;
    --color-white-2: #FFF0E1;
    --color-white-2-rgb: 255, 240, 225;
    --color-green-1: #BCC86C;
    --color-green-1-rgb: 188, 200, 108;
    --color-brown-1: #D2A680;
    --color-brown-1-rgb: 210, 166, 128;
    --color-brown-2: #D29672;
    --color-brown-2-rgb: 210, 150, 114;
    --color-brown-3: #753E27;
    --color-brown-3-rgb: 117, 62, 39;
    --color-brown-4: #784119;
    --color-brown-4-rgb: 120, 65, 25;
    --color-purple-1: #D0AFC8;
    --color-purple-1-rgb: 208, 175, 200;
    --color-blue-1: #284E66;
    --color-blue-1-rgb: 40, 78, 102;
    --ff-root: "Shippori Mincho", serif;
    --ff-zenkaku: "Zen Kaku Gothic New", sans-serif;
    --ff-lato: "Lato", sans-serif;
}
@media print, screen and (min-width: 751px) {
    :root {
        --contents-width-pc: 430;
        --root-fz: 16;
    }
}

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

::-moz-selection {
    background-color: var(--color-base-1);
    color: var(--color-white-1);
}

::selection {
    background-color: var(--color-base-1);
    color: var(--color-white-1);
}

/* ---------------------------------------------
*   html, body
--------------------------------------------- */
html,
body {
    color: var(--color-base-1);
    font-size: calc(var(--root-fz) / var(--design-width) * 100vw);
    font-family: var(--ff-root);
    -webkit-text-size-adjust: 100%;
}
@media print, screen and (min-width: 751px) {
    html,
    body {
        font-size: calc(var(--root-fz) * var(--contents-width-pc) / var(--design-width) * 1px);
    }
}

body {
    min-width: calc(var(--minwidth) * 1px);
    line-height: var(--line-height);
    font-feature-settings: "palt";
}
@media print, screen and (min-width: 751px) {
    body {
        min-width: initial;
    }
}

sup {
    font-size: 50%;
}

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

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