.inner {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}
.post-main {
    width: calc(100% - 200px - 2rem);
}
@media screen and (max-width: 780px) {
    .inner {
        flex-direction: column-reverse;
    }
    .post-main {
        width: 100%;
    }
}

#sidebar {
    width: 200px;
}
#sidebar ul {
    list-style: none;
}
#sidebar > ul.sidebar-list > li {
    margin-bottom: 1rem;
}
#sidebar .wp-block-archives-dropdown {
    display: flex;
    flex-wrap: wrap;
}
#sidebar .wp-block-archives-dropdown .wp-block-archives__label {
    width: 100%;
    padding-bottom: 0.2rem;
    border-bottom: 1px solid var(--main-font-color);
}
#sidebar .wp-block-archives-dropdown select {
    width: 100%;
    margin-top: 0.5rem;
    -moz-appearance: none;
    -webkit-appearance: none;
    appearance: none;
    border: 1px solid #dbdbd6;
    border-radius: 0;
    color: inherit;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    padding: 0.3em 0.6em;
    width: 100%;
}
#sidebar .wp-block-archives-dropdown select::-ms-expand {
    display: none;
}
#sidebar .wp-block-archives-dropdown select:focus {
    border: 1px solid #dbdbd6;
    box-shadow: none;
    outline: none;
}
@media screen and (max-width: 780px) {
    #sidebar {
        width: 100%;
        margin-top: 2rem;
    }
}