header {
    display: flex;
    align-items: center; /* 水平方向中央揃え */
    justify-content: flex-start; /* 垂直方向中央揃え */
    gap: 8px;
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
}

header a {
    color: #333;
    text-decoration: none;
}

.brand {
    padding: 16px 0;
    margin: 0;
    font-size: 24px;
    font-weight: 800;
}

.icon-image {
    width: 38px;
    height: 38px;
    border-radius: 10px;
}

main {
    display: flex;
    flex-direction: column; /* 垂直方向に要素を配置 */
    align-items: center; /* 水平方向中央揃え */
    justify-content: center; /* 垂直方向中央揃え */
    height: 100vh; /* 画面全体の高さ */
    max-width: 600px;
    width: 100%;
    margin: 0 auto;
}

article {
    display: flex;
    flex-direction: column; /* 垂直方向に要素を配置 */
    align-items: center; /* 水平方向中央揃え */
    justify-content: center; /* 垂直方向中央揃え */
    gap: 8px;
    width: 100%;
}

h1 {
    font-size: 2em;
    margin: 0 0 16px 0;
    text-align: start;
    width: 100%;
}

/*
h2 {
    margin: 0;
    padding: 64px 0 16px 0;
    font-size: 1.4em;
    font-weight: bold;
    line-height: 1.5em;
}
*/

h2 {
    margin: 64px 0 16px 0;
    font-size: 1.4em;
    font-weight: bold;
    line-height: 1.5em;

    border-left: 7px solid #c6efff;
    border-right: 1px solid #c6efff;
    border-top: 1px solid #c6efff;
    border-bottom: 1px solid #c6efff;
    padding: 12px 20px;
}



article h3, .article h4, .article h5, .article h6, .cat-link, .tag-link {
    border-color: #c6efff;
}

.article h3 {
    border-left: 7px solid var(--cocoon-middle-thickness-color);
    border-right: 1px solid var(--cocoon-thin-color);
    border-top: 1px solid var(--cocoon-thin-color);
    border-bottom: 1px solid var(--cocoon-thin-color);
    font-size: 22px;
    padding: 12px 20px;
}

h3 {
    margin: 2.5em 0 0;
    font-size: 1em;
    font-weight: bold;
    line-height: 1.625em;
    text-decoration: underline;
}

p {
    margin: 0 0 0.625rem;
}

a {
    color: #0071c1;
}

li.article-list {
    margin-bottom: .625rem;
    margin-left: 17px;
    padding-left: 8px;
}

a .material-icons, a .material-icons-round, a .material-icons-outlined {
    color: #0071c1;
}

.material-icons, .material-icons-round, .material-icons-outlined {
    display: inline-flex;
    vertical-align: middle;
}

#toc-container {
    padding: 12px;
    border: 1px solid rgb(214, 211, 208);
    border-radius: 8px;
}

#toc-container a {
    text-decoration: none;
}

#toc-title {
    display: flex;
    align-items: center; /* 水平方向中央揃え */
    gap: 12px;
    margin: 0px 0px 12px;
    font-size: 1.2rem;
    font-weight: bold;
}

#toc-title:before {
    width: 20px;
    content: "\e241";
    font-family: "Material Icons";
    color: #706d65;
    font-size: 1.2rem;
}

#toc {
    list-style-type: none;
    padding-left: 32px;
    margin: 0;
}

#toc li {
    line-height: 1.8em;
}

#help-container {
    margin-top: 2.5em;
    margin-bottom: 64px;
}

.info-container {
    /*
    border-left-color: #7fd1de;
    border-left-style: solid;
    border-left-width: 5px;
    padding: 20px 30px 10px;
    */

    background-color: #e5f5f8;
    padding: 20px 30px;
    margin: 0 0 .625rem;
}

.warning-container {
    /*
    border-left-color: #e68250;
    border-left-style: solid;
    border-left-width: 5px;
    padding: 20px 30px 10px;
    */

    background-color: #ffebe6;
    padding: 20px 30px;
    margin: 0 0 .625rem;
}

@media (max-width: 864px) {
    main, header{
        padding: 0 16px;
    }
}