/* ---------------------------------------------
*   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: #000;
    --color-base-1-rgb: 0, 0, 0;
    --color-black-1: #000;
    --color-black-1-rgb: 0, 0, 0;
    --color-black-2: #111;
    --color-black-2-rgb: 17, 17, 17;
    --color-white-1: #fff;
    --color-white-1-rgb: 255, 255, 255;
    --color-white-2: #FFFCED;
    --color-white-2-rgb: 255, 252, 237;
    --color-theme-1: #E9503A;
    --color-theme-1-rgb: 233, 80, 58;
    --color-orange-1: #F4AA34;
    --color-orange-1-rgb: 244, 170, 52;
    --color-orange-2: #FF9D00;
    --color-orange-2-rgb: 255, 157, 0;
    --color-yellow-1: #FFD45A;
    --color-yellow-1-rgb: 255, 212, 90;
    --color-yellow-2: #FFDF50;
    --color-yellow-2-rgb: 255, 223, 80;
    --color-yellow-3: #FFF7D3;
    --color-yellow-3-rgb: 255, 247, 211;
    --color-brown-1: #763B2F;
    --color-brown-1-rgb: 118, 59, 47;
    --color-brown-2: #382B20;
    --color-brown-2-rgb: 56, 43, 32;
    --color-brown-3: #2E0B0E;
    --color-brown-3-rgb: 46, 11, 14;
    --color-green-1: #E1EFBB;
    --color-green-1-rgb: 225, 239, 187;
    --color-green-2: #313D00;
    --color-green-2-rgb: 49, 61, 0;
    --color-green-3: #F0F7DD;
    --color-green-3-rgb: 240, 247, 221;
    --color-green-4: #06C755;
    --color-green-4-rgb: 6, 199, 85;
    --color-red-1: #DC321E;
    --color-red-1-rgb: 220, 50, 30;
    --color-red-2: #C10230;
    --color-red-2-rgb: 193, 2, 48;
    --color-pink-1: #FFDCCA;
    --color-pink-1-rgb: 255, 220, 202;
    --ff-root: "Noto Serif JP", serif;
    --ff-zenkaku: "Zen Kaku Gothic New", sans-serif;
    --ff-noto-sans: "Noto Sans JP", sans-serif;
    --ff-lato: "Lato",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-theme-1);
    color: var(--color-white-1);
}

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

/* ---------------------------------------------
*   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: 750px) {
    html,
    body {
        font-size: calc(var(--root-fz) / var(--design-width) * 100vw);
    }
}

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

/* ---------------------------------------------
*   <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 {
    display: block;
    width: auto;
    height: 0;
    padding-top: calc(15 / var(--design-width) * 100vw);
    border: 0;
    margin-top: calc(75 / var(--design-width) * 100vw);
    background: 0;
    pointer-events: none;
}
@media print, screen and (min-width: 751px) {
    hr {
        margin-top: calc(75 * var(--contents-width-pc) / var(--design-width) * 1px);
        padding-top: calc(15 * var(--contents-width-pc) / var(--design-width) * 1px);
    }
}