/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */

/* Document
   ========================================================================== */

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */

html {
    line-height: 1.15; /* 1 */
    -webkit-text-size-adjust: 100%; /* 2 */
}

/* Sections
   ========================================================================== */

/**
 * Remove the margin in all browsers.
 */

body {
    margin: 0;
}

/**
 * Render the `main` element consistently in IE.
 */

main {
    display: block;
}

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */

h1 {
    font-size: 2em;
    margin: .67em 0;
}

/* Grouping content
   ========================================================================== */

/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */

hr {
    box-sizing: content-box; /* 1 */
    height: 0; /* 1 */
    overflow: visible; /* 2 */
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

pre {
    font-family: monospace, monospace; /* 1 */
    font-size: 1em; /* 2 */
}

/* Text-level semantics
   ========================================================================== */

/**
 * Remove the gray background on active links in IE 10.
 */

a {
    background-color: transparent;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */

abbr[title] {
    border-bottom: none; /* 1 */
            text-decoration: underline; /* 2 */
    -webkit-text-decoration: underline dotted;
            text-decoration: underline dotted; /* 2 */
}

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */

b, strong {
    font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

code, kbd, samp {
    font-family: monospace, monospace; /* 1 */
    font-size: 1em; /* 2 */
}

/**
 * Add the correct font size in all browsers.
 */

small {
    font-size: 80%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */

sub, sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sub {
    bottom: -0.25em;
}

sup {
    top: -0.5em;
}

/* Embedded content
   ========================================================================== */

/**
 * Remove the border on images inside links in IE 10.
 */

img {
    border-style: none;
}

/* Forms
   ========================================================================== */

/**
 * 1. Change the font styles in all browsers.
 * 2. Remove the margin in Firefox and Safari.
 */

button, input, optgroup, select, textarea {
    font-family: inherit; /* 1 */
    font-size: 100%; /* 1 */
    line-height: 1.15; /* 1 */
    margin: 0; /* 2 */
}

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */

button, input {
    /* 1 */
    overflow: visible;
}

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */

button, select {
    /* 1 */
    text-transform: none;
}

/**
 * Correct the inability to style clickable types in iOS and Safari.
 */

button, [type="button"], [type="reset"], [type="submit"] {
    -webkit-appearance: button;
}

/**
 * Remove the inner border and padding in Firefox.
 */

button::-moz-focus-inner, [type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner, [type="submit"]::-moz-focus-inner {
    border-style: none;
    padding: 0;
}

/**
 * Restore the focus styles unset by the previous rule.
 */

button:-moz-focusring, [type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring, [type="submit"]:-moz-focusring {
    outline: 1px dotted ButtonText;
}

/**
 * Correct the padding in Firefox.
 */

fieldset {
    padding: .35em .75em .625em;
}

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */

legend {
    box-sizing: border-box; /* 1 */
    color: inherit; /* 2 */
    display: table; /* 1 */
    max-width: 100%; /* 1 */
    padding: 0; /* 3 */
    white-space: normal; /* 1 */
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */

progress {
    vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */

textarea {
    overflow: auto;
}

/**
 * 1. Add the correct box sizing in IE 10.
 * 2. Remove the padding in IE 10.
 */

[type="checkbox"], [type="radio"] {
    box-sizing: border-box; /* 1 */
    padding: 0; /* 2 */
}

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
    height: auto;
}

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */

[type="search"] {
    -webkit-appearance: textfield; /* 1 */
    outline-offset: -2px; /* 2 */
}

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */

[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
}

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */

::-webkit-file-upload-button {
    -webkit-appearance: button; /* 1 */
    font: inherit; /* 2 */
}

/* Interactive
   ========================================================================== */

/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */

details {
    display: block;
}

/*
 * Add the correct display in all browsers.
 */

summary {
    display: list-item;
}

/* Misc
   ========================================================================== */

/**
 * Add the correct display in IE 10+.
 */

template {
    display: none;
}

/**
 * Add the correct display in IE 10.
 */

[hidden] {
    display: none;
}

.button {
    border-radius: 3px;
    border: none;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    line-height: 54px;
    outline: none;
}

.button::before, .button::after {
    position: absolute;
    z-index: -1;
    display: block;
    content: '';
}

.button, .button::before, .button::after {
    box-sizing: border-box;
    -webkit-transition: all .3s;
            transition: all .3s;
}

.button {
    background: blue;
    color: white;
}

.button:hover {
    background: white;
    border: 1px solid blue;
    color: blue;
}

/*@import "./include/layout.css";*/

/* common */

@media screen {
    .main-nav {
        margin: 0;
        padding: 0;
        z-index: 999;
        position: fixed;
        width: 100vw;
        top: 0;
        left: 0;
    }

    .nav-items {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
        padding: 0;
        margin: 0;
        list-style-type: none;
    }

    .nav-item {
        font-size: 1.25rem;
        text-decoration: none;
        text-align: left;
        padding-top: auto;
        padding-bottom: auto;
        color: white;
    }

    .nav-item svg {
        padding-top: auto;
        padding-bottom: auto;
    }

    .nav-icon {
        text-align: center;
    }

    .nav-icon.disabled svg {
        fill: gray;
    }

    a.nav-item:hover, div.nav-item:hover {
        background: red;
        opacity: .5;
    }

    .nav-item.disabled:hover {
        background: inherit;
    }

    .nav-title {
        margin-top: auto;
        margin-bottom: auto;
        font-size: 1.25rem;
        padding-left: 5px;
        display: block;
    }

    .footer {
        position: fixed;
        display: -webkit-box;
        display: flex;
        align-content: center;
        -webkit-box-pack: justify;
        justify-content: space-between;
        z-index: 999;
        left: 0;
        width: 100vw;
        height: 48px;
        bottom: 0;
        padding-left: calc((100vw - 1024px)/2);
        padding-right: calc((100vw - 1024px)/2);
        margin: auto 0 auto 0;
    }

    .footer .nav-item {
        display: block;
        margin-top: auto;
        margin-bottom: auto;
        border: none;
        color: white;
    }
}

/* for smart phone */

@media screen and (max-width:480px) {
    .main-nav {
        display: -webkit-box;
        display: flex;
        -webkit-box-align: center;
        align-items: center;
        -webkit-box-pack: justify;
        justify-content: space-between;
        height: 48px;
    }

    .main-nav .nav-header {
        display: -webkit-box;
        display: flex;
        align-content: center;
    }/*      .nav-button {
        width: 48px;
        height:48px;
        text-align:center;
        border:none;
        background:none;
      }*/

    .main-nav .nav-header .nav-title {
        font-size: 1.25rem;
        vertical-align: middle;
    }

    .nav-items {
        padding-right: 10px;
    }

    .nav-display-default {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
    }

    .nav-display-toggle {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
    }

    .nav-icon {
        /* margin:auto 10 10 10;*/
        display: block;
        /* padding:0 0 0 0;*//* width:52px;*/
        height: 32px;
        display: block;
    }

    .nav-icon svg {
        margin: auto;
        color: white;
        width: 32px;
        height: 32px;
        fill: white;
        /*      &:hover {
        fill:red;
      }*/
    }

    .nav-icon.nav-hidden-desktop {
        display: inline-block;
        vertical-align: middle;
        padding-left: 10px;
        display: inline;
    }

    .footer {
        padding-left: 5px;
        padding-right: 5px;
        height: 48px;
        display: -webkit-box;
        display: flex;
        align-content: center;
        -webkit-box-pack: justify;
        justify-content: space-between;
    }
}

@media screen and (min-width:481px) and (max-width:960px) {
    .main-nav {
        display: -webkit-box;
        display: flex;
        -webkit-box-align: center;
        align-items: center;
        -webkit-box-pack: justify;
        justify-content: space-between;
        height: 48px;
    }

    .main-nav .nav-header {
        display: -webkit-box;
        display: flex;
        height: 48px;
        align-content: center;
    }

    .main-nav .nav-header .nav-button {
        width: 48px;
        border: none;
        background: none;
        display: block;
        font-size: 1.25rem;
    }

    .main-nav .nav-header .nav-button svg {
        vertical-align: middle;
    }

    .main-nav .nav-header .nav-title {
        vertical-align: middle;
    }

    .nav-items {
        padding-right: 10px;
    }

    .nav-display-default {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
    }

    .nav-display-toggle {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        flex-direction: column;
    }

    .nav-icon {
        display: block;
        width: 52px;
        height: 32px;
        display: block;
    }

    .nav-icon svg {
        display: inline-block;
        color: white;
        width: 32px;
        height: 32px;
        fill: white;
    }

    .nav-icon.nav-hidden-desktop {
        display: inline;
    }

    .footer {
        padding-left: 5px;
        padding-right: 20px;
    }
}

/* for deskctop */

@media screen and (min-width:961px) {
    .main-nav {
        display: -webkit-box;
        display: flex;
        padding-left: calc((100vw - 1024px)/2);
        padding-right: calc((100vw - 1024px)/2);
        -webkit-box-align: center;
        align-items: center;
        -webkit-box-pack: justify;
        justify-content: space-between;
        height: 48px;
    }

    .nav-header {
        color: red;
    }

    .nav-button {
        display: none;
    }

    .nav-items {
        -webkit-box-align: center;
        align-items: center;
        height: 100%;
    }

    .nav-items li {
        color: white;
    }

    .nav-items .nav-item, .footer .nav-item {
        font-size: 1rem;
    }

    .nav-icon {
        /*margin:auto 10 auto 10;*/
        display: block;
        padding: auto;
        width: 52px;
        height: 32px;
    }

    .nav-icon svg {
        display: inline-block;
        width: 32px;
        height: 32px;
        fill: white;
    }

    .nav-icon.nav-hidden-desktop {
        display: none;
    }

    .nav-display-default {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
    }

    .nav-display-toggle {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
    }
}

/* デバイス共通属性 */

@media screen {
    .amazon {
        font-size: .75rem;
        line-height: 1.25rem;
        margin: 5px;
        padding: 5px;
        background: #fffff0;
        display: -webkit-box;
        display: flex;
    }

    .amazon * {
        font-size: inherit;
        line-height: inherit;
    }

    .amazon.amazon-detail-image {
        padding: 5px;
    }

    .amazon.amazon-detail-svglogo {
        display: block;
        width: 64px;
        padding: 5px;
        fill: #000;
    }
}

/* スマートフォン向け */

@media screen and (max-width:480px) {
}

/* タブレット向け */

@media screen and (min-width:481px) and (max-width:960px) {
}

/* デスクトップ向け */

@media screen and (min-width:961px) {
}

@media screen {
    div.if4by33, sf {
        position: relative;
        width: 100%;
        padding-top: 75%;
    }

    div.if16by9, sfif16by9 {
        position: relative;
        width: 100%;
        padding-top: 56.25%;
    }

    div.if iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }
}

.hljs-comment, .hljs-quote {
    font-family: inherit;
    color: #20a020;
}

.hljs-variable, .hljs-template-variable, .hljs-tag, .hljs-name,
.hljs-selector-id, .hljs-selector-class, .hljs-regexp, .hljs-deletion {
    font-family: inherit;
    color: #c66;
}

.hljs-number, .hljs-built_in, .hljs-builtin-name, .hljs-literal, .hljs-type,
.hljs-params, .hljs-meta, .hljs-link {
    font-family: inherit;
    color: #de935f;
}

.hljs-attribute {
    font-family: inherit;
    color: #f0c674;
}

.hljs-string, .hljs-symbol, .hljs-bullet, .hljs-addition {
    font-family: inherit;
    color: #808080;
}

.hljs-title, .hljs-section {
    font-family: inherit;
    color: #81a2be;
}

.hljs-keyword, .hljs-selector-tag {
    font-family: inherit;
    color: #404040;
    font-weight: bold;
}

.hljs {
    font-family: inherit;
    font-size: 14px;
    line-height: 15px;
    display: block;
    overflow-x: auto;
    background: white;
    color: black;
    padding: .5em;
}

.hljs-emphasis {
    font-family: inherit;
    font-style: italic;
}

.hljs-strong {
    font-family: inherit;
    font-weight: bold;
}

.sf-tweet-thread {
    display: block;
    background: white;
    color: #202020;
    max-width: 800px;
    /*max-height:960px;*/
    overflow: auto;
    border-radius: 3px;
    opacity: 1;
    margin-left: auto;
    margin-right: auto;
    padding-top: 8px;
    padding-bottom: 8px;
}

.sf-tweet-thread * {
    line-height: 1.2rem;
}

.sf-tweet-thread section {
    margin-left: 8px;
    margin-right: 8px;
}

.tweet-header {
    background: inherit;
    color: black;
    margin: 0;
    padding: 0;
    display: grid;
    -webkit-box-align: end;
    align-items: end;
    grid-template-columns: 40px 2fr 1fr;
    grid-template-rows: 1fr;
    font-size: .9rem;
    font-weight: bold;
}

.tweet-img {
    width: 100%;
    -o-object-fit: cover;
       object-fit: cover;
}

.youtube {
    position: relative;
    cursor: pointer;
}

.youtube > img {
    width: 100%;
    -o-object-fit: cover;
       object-fit: cover;
}

.youtube > svg.player-play {
    width: 64px;
    height: 64px;
    left: calc(50% - 32px);
    top: calc(50% - 32px);
    position: absolute;
    z-index: 1000;
    opacity: .5;
}

.youtube:hover > svg.player-play {
    opacity: 1;
}

.youtube:hover .player-play-1 {
    stroke: rgba(128, 128, 128, .50196);
}

.youtube > div.yt-title {
    /*text-shadow: #fff 1px 1px 0;*/
    font-size: 1.2rem;
    color: white;
    background: rgba(0, 0, 0, .5);
    position: absolute;
    left: 0;
    top: 0;
    overflow: auto;
    z-index: 998;
}

.tweet-profile-img {
    grid-column: 1/2;
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.tweet-user-name {
    font-size: .8rem;
    grid-column: 2/3;
    margin: 4px;
}

.tweet-date {
    color: black;
    font-size: .8rem;
    margin: 0;
    text-align: right;
    grid-column: 3/4;
}

.tweet-date a {
    color: black;
}

.sf-tweet-thread > .twitter-widget {
    overflow: auto;
    max-height: 960px;
    position: absolute;
}

.sf-tweet-thread > section > .tweet-text {
    display: block;
    padding: 4px;
    word-break: break-all;
    font-size: .8rem;
}

.sf-tweet-thread > section > h3 {
    font-size: inherit;
}

.card {
    border: 1px solid #e0e0e0;
    margin: 8px;
    padding: 8px;
    font-size: .9rem;
    background: white;
    border-radius: 4px;
}

.card header {
    background: inherit;
    font-size: inherit;
    margin: 0;
    padding: 8px;
    display: grid;
    grid-gap: 8px;
}

.card header img {
    width: 100%;
}

.card-default {
    font-size: .9rem;
}

.card-default > header {
    grid-template-columns: 64px 1fr;
}

.card-default > div {
    font-size: .8rem;
}

.card-large > div {
    font-size: .8rem;
}

.card-large > header {
    grid-template-columns: 1fr;
}

.no-image {
    font-size: 10px;
    display: block;
    width: 64px;
    height: 64px;
    background: gray;
    color: white;
    text-align: center;
    line-height: 64px;
}

/*@import "./katex.css";*/

/* デバイス共通属性 */

@media screen {
    * {
        box-sizing: border-box;
    }

    html {
        font-family: -apple-system,
                     BlinkMacSystemFont,
                     "Helvetica Neue",
                     "Yu Gothic",
                     YuGothic,
                     "ヒラギノ角ゴ ProN W3",
                     Hiragino Kaku Gothic ProN,
                     Arial,
                     "メイリオ",
                     Meiryo,
                     sans-serif;
        font-size: 18px;
        line-height: 1.85rem;
        /*letter-spacing:0.1rem;*/
        word-wrap: break-word;
        word-break: loose;
        /*border: 1px dashed gray;*/
    }

    code {
        color: #303030;
        font-weight: bold;
        padding: 5px;
        line-height: 1rem;
    }

    code span {
        font-size: inherit;
    }

    pre {
        background: white;
        padding: 5px;
        word-break: break-all;
        white-space: pre-wrap;
    }

    pre code {
        font-family: monospace;
        font-weight: normal;
        overflow: auto;
        display: block;
        font-size: .9rem;
        letter-spacing: normal;
        line-height: 1rem;
        background: white;
    }

    pre code span {
        line-height: inherit;
    }

    h1 {
        font-size: 1.55rem;
        line-height: 2.25rem;
    }

    h2 {
        font-size: 1.45rem;
    }

    h3 {
        font-size: 1.35rem;
    }

    h4, h5, h6 {
        font-size: 1.25rem;
    }

    body {
        background: #f0f0e0;
    }

    img {
        display: block;
        /*width:100%;*/
        max-width: 100%;
        height: auto;
    }

    a {
        color: #eb6100;
        -webkit-text-decoration-line: none;
                text-decoration-line: none;
    }

    a:hover {
        -webkit-text-decoration-line: underline;
                text-decoration-line: underline;
    }

    .icon-h1 {
        margin-right: .5rem;
        width: 3.2rem;
        /*  height:3.2rem; */
        vertical-align: middle;
    }

    a {
        font-size: inherit;
    }

    ul.contents .bl {
        display: block;
    }

    nav {
        background: #d3381c;
        opacity: .85;
        color: white;
    }

    nav a {
        color: white;
    }

    nav a:visited {
        color: white;
    }

    header {
        /*  display:flex; *//*  align-items:center;*//*  justify-content: flex-start;*/
        color: white;
        background: #6d3f00;
        /*background:green;*/
        position: relative;
        /*min-height:30vh;*/
        padding: 20px 10px 40px 10px;
        margin: 0 0 0 0;
    }

    header img {
        width: 100%;
    }

    header a {
        color: #f39800;
    }

    header.header {
        margin: 0 0 20px 0;
    }

    header.header h1 {
        background: #6d3f00;
        color: white;
        margin: 0;
        padding: 40px 10px;
        letter-spacing: 7px;
    }

    caption {
        display: block;
        font-size: .5rem;
    }

    main > h2 {
        margin: 10px;
        font-size: 1.25rem;
    }

    .contents {
        display: -webkit-box;
        display: flex;
    }

    .contents aside.item {
        background: #efe;
    }

    .contents .item {
        margin: 4px;
        padding: 8px;
    }

    .contents .item img {
        /*box-shadow:0px 0px 2px;*/
        -webkit-box-flex: 1;
        flex: 1;
        display: block;
        border: black;
        width: 100%;
    }

    .contents .item img:hover {
        -webkit-filter: brightness(200%);
                filter: brightness(200%);
    }

    .contents .item h3 a {
        font-size: 1rem;
        color: black;
        text-decoration: none;
    }

    .contents .item h3 a:before {
        content: url("../../img/link.svg");
    }

    .contents .item h3 a:hover {
        color: inherit;
    }

    .contents .item h3 a svg:hover path {
        fill: #f00;
    }

    .contents .item .mention {
        word-break: keep-all;
        font-size: .85rem;
        border-radius: 4px;
        padding: 4px;
        margin-left: 3px;
        margin-right: 3px;
        background: black;
        text-decoration: none;
        color: white;
    }

    .contents .item .mention:hover {
        color: black;
        background: lightgray;
    }

    .contents .item h1, .contents .item h2, .contents .item h3,
    .contents .item h4 {
        padding: 4px;
        margin: 0;
    }

    .contents .item h1:hover, .contents .item h2:hover, .contents .item h3:hover,
    .contents .item h4:hover {
        color: red;
    }

    .contents aside.item {
        display: block;
    }

    small {
        display: block;
        text-align: center;
        margin: auto;
    }

    .embed-responsive {
        position: relative;
        height: 0;
        width: 100%;
        overflow: hidden;
    }

    .embed-responsive.embed-responsive-16by9 {
        padding-top: 56.25%;
    }

    .embed-responsive.embed-responsive-4by3 {
        padding-top: 75%;
    }

    .embed-responsive.embed-responsive-8by5 {
        padding-top: 62.5%;
    }

    .embed-responsive iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }

    table {
        width: 100%;
        border: 1px solid #6d3f00;
        border-collapse: collapse;
    }

    table th {
        font-size: .8rem;
        background: #f3583c;
        border: 1px solid #f3583c;
    }

    table td {
        font-size: .8rem;
        background: white;
        border: 1px solid #f3583c;
    }

    table td a {
        color: blue;
    }

    blockquote {
        padding-left: 10px;
        border-left: 4px solid #f3583c;
        background: #fffff0;
    }

    footer {
        text-align: center;
    }

    iframe {
        display: block;
        margin: auto;
    }
}

/* スマートフォン向け */

@media screen and (max-width:480px) {
    html {
        width: 100vw;
        height: 100vh;
    }

    body {
        padding-top: 48px;
        padding-bottom: 64px;
    }

    .title {
        font-size: 40px;
    }

    h1 {
        font-size: 1.55rem;
        line-height: 2rem;
    }

    h2 {
        font-size: 1.45rem;
    }

    h3 {
        font-size: 1.35rem;
    }

    h4, h5, h6 {
        font-size: 1.15rem;
    }

    .about {
        padding-left: 4px;
        padding-right: 4px;
    }

    .contents {
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        flex-direction: column;
        flex-wrap: wrap;
    }

    .contents .item {
        justify-content: space-around;
        -webkit-box-flex: 1;
        flex: 1;
    }

    header {
        text-align: center;
        -webkit-box-pack: center;
        justify-content: center;
        -webkit-box-align: center;
        align-items: center;
        /*margin-left:2vw;
    margin-right:2vw;*/
    }

    main {
        margin-left: 2vw;
        margin-right: 2vw;
    }
}

@media screen and (min-width:481px) and (max-width:960px) {
    html {
        width: 100%;
        height: 100%;
    }

    body {
        padding-top: 48px;
        padding-bottom: 64px;
    }

    .title {
        font-size: 40px;
    }

    .about {
        padding-left: 4px;
        padding-right: 4px;
    }

    header.header {
        /*
      margin-left:3vw;
      margin-right:3vw;*/
    }

    .contents {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
        flex-wrap: wrap;
        -webkit-box-pack: start;
        justify-content: flex-start;
    }

    .contents .item {
        max-width: calc(100% - 8px);
        flex-basis: calc(100% - 8px);
    }

    main {
        margin-left: 3vw;
        margin-right: 3vw;
    }
}

@media screen and (min-width:961px) {
    .title {
        font-size: 40px;
    }

    html {
        max-width: 1024px;
        width: 1024px;
        height: 100vh;
        margin-left: calc((100vw - 1024px)/2);
        margin-right: calc((100vw - 1024px)/2);
        /*   margin-left:var(--adjust-margin);
    margin-right:var(--adjust-margin);*/
    }

    body {
        padding-top: 48px;
        padding-bottom: 64px;
        margin: 0;
        width: 100%;
        min-height: 100vh;
    }

    header {
        margin-left: 1vw;
        margin-right: 1vw;
    }

    header.header {
        /* margin-left:3vw;*/
    }

    header div, header span {
        font-size: .8rem;
    }

    main {
        display: -webkit-box;
        display: flex;
        flex-wrap: nowrap;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        flex-direction: column;
        -webkit-box-pack: center;
        justify-content: center;
        margin-left: 1vw;
        margin-right: 1vw;
    }

    main .contents {
        display: -webkit-box;
        display: flex;
        -webkit-box-orient: horizontal;
        -webkit-box-direction: normal;
        flex-direction: row;
        flex-wrap: wrap;
        -webkit-box-pack: start;
        justify-content: flex-start;
    }

    main .contents .item {
        -webkit-box-flex: 1;
        flex: 1;
        max-width: calc(100%);
        flex-basis: calc(100%);
    }

    main .ad {
        margin: auto;
        width: 80%;
        min-height: 150px;
        display: -webkit-box;
        display: flex;
        -webkit-box-pack: center;
        justify-content: center;
        -webkit-box-align: center;
        align-items: center;
    }
}

/* デバイス共通属性 */

@media screen {
    /* header {
    background-image: url('../img/fuji-2.jpg');
    background-size:cover;
    background-position: 58% 5%;
    min-height:30vh;
  }*/
}

/* スマートフォン向け */

@media screen and (max-width:480px) {
    /*header {
    min-height:30vh;
  }*/
}