/*H2見出し*/
.post-single h2 {
    padding: 15px 0;
    border-bottom: 2px solid rgb(0 0 0 / 30%);
    font-size: 1.8rem;
}

/*H3見出し*/
.post-single h3 {
    padding: 13px 0;
    border-bottom: 1px dashed rgb(0 0 0 / 30%);
    font-size: 1.5rem;
}

/*H4見出し*/
.post-single h4 {
    padding: 8px 0;
    display: flex;
    align-items: center;
    font-size: 1.2rem;
}

.post-single h4:before {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid rgb(0 0 0 / 50%);
    margin-right: 8px;
    vertical-align: middle;
    transform: rotate(-90deg);
}

/* モバイル対応 */
@media screen and (max-width: 768px) {
    .logo a{
        font-size: 1.2rem;
    }

    .post-single h1 {
        font-size: 1.8rem;
    }

    .post-single h2 {
        font-size: 1.5rem;
    }

    .post-single h3 {
        font-size: 1.3rem;
    }

    .post-single h4 {
        font-size: 1.1rem;
    }
}