.textbook-info-container,
.part-info-container,
.question-container,
.solution-container,
.about-user-continer,
.part-editor-container,
.q-editor-container {
    margin-top: 8px;
    /* margin-left: 8px;
    margin-right: 8px; */
    padding: 4px 8px;
    border: var(--border-size);
    background-color: white;
}
/* @media screen and (min-width: 768px) { 
    .textbook-info-container,
    .part-info-container,
    .question-container,
    .solution-container,
    .about-user-continer,
    .part-editor-container,
    .q-editor-container {
        margin-left: 8px;
        margin-right: 8px;
    }
} */
.textbook-info-container-h,
.part-info-container-h,
.question-container-h,
.solution-container-h,
.about-user-continer-h,
.part-editor-container-h,
.q-editor-container-h {
    position: relative;
    display: flex;
    padding: 4px 0;
    border-bottom: var(--border-size);
}
.textbook-info-container-h h4,
.part-info-container-h h4,
.question-container-h h4,
.solution-container-h h4,
.about-user-continer-h h4,
.part-editor-container-h h4,
.q-editor-container-h h4 {
    font-size: var(--font-size);
}
.textbook-info-container a,
.part-info-container a,
.question-container a,
.solution-container a,
.about-user-continer a,
.part-editor-container a,
.q-editor-container a {
    margin-left: auto;
    text-decoration: none;
    color: rgb(165, 165, 165);
    font-size: calc(var(--font-size) - 2px);
}
.textbook-info-container {
    margin-top: 0;
}
.part-info-container-b,
.textbook-info-container-b {
    display: flex;
    width: 100%;
    padding: 4px 0;
}
.part-info-container-b p,
.textbook-info-container-b p {
    margin: 0;
    font-size: var(--font-size);
}
.part-info-container-b .arrow {
    position: relative;
    width: var(--bar-width);
    line-height: 24px;
    margin: 0 4px;
}
.part-info-container-b .arrow .bar{
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    width: 8px;
    height: 1px;
    background-color: rgb(108, 108, 108);
}
.part-info-container-b .arrow .top-bar{
    transform-origin: bottom right;
    transform: rotate(30deg);
}
.part-info-container-b .arrow .bottom-bar{
    transform-origin: top right;
    transform: rotate(-30deg);
}
.sidebar-btn,
.textbook-sidebar-btn {
    position: relative;
    width: var(--bar-width);
    margin-right: 8px;
}
.sidebar-btn .bar,
.textbook-sidebar-btn .bar {
    position: absolute;
    top: 50%;
    left: 0;
    translate: 0 -50%;
    width: var(--bar-width);
    height: 2px;
    background-color: rgb(108, 108, 108);
    transition: 0.5s;
}
.sidebar-btn .top-bar,
.textbook-sidebar-btn .top-bar {
    transform: translateY(-4px);
}
.sidebar-btn .bottom-bar,
.textbook-sidebar-btn .bottom-bar {
    transform: translateY(4px);
}
.part-info-checkbox,
.textbook-info-checkbox {
    display: none;
}
.part-info-checkbox:checked~.sidebar-btn .top-bar,
.textbook-info-checkbox:checked~.textbook-sidebar-btn .top-bar {
	transform: rotate(45deg);
    transition: 0.5s;
}
.part-info-checkbox:checked~.sidebar-btn .middle-bar,
.textbook-info-checkbox:checked~.textbook-sidebar-btn .middle-bar {
	opacity: 0;
    transition: 0.5s;
}
.part-info-checkbox:checked~.sidebar-btn .bottom-bar,
.textbook-info-checkbox:checked~.textbook-sidebar-btn .bottom-bar {
	transform: rotate(135deg);
    transition: 0.5s;
}
.textbook-detail-info,
.part-list {
    position: absolute;
    translate: -8px calc(var(--font-size) + 24px);
    height: 0;
    min-width: 20%;
    max-height: 50vh;
    border: var(--border-size);
    display: block;
    z-index: 1;
    height: 0;
    visibility: hidden;
    opacity: 0;
    overflow: auto;
    background-color: white;
    transition: 0.5s;
    padding: 8px;
    text-align: center;
}
.textbook-detail-info p {
    display: inline;
    width: auto;
    text-align: center;
    font-size: var(--font-size-small);
    border-bottom: var(--border-size);
}
.textbook-detail-info table {
    display: table;
    flex-direction: column;
    border-collapse: collapse;
    border: 1px solid transparent;
    border-left: none;
    border-right: none;
    border-spacing: 4px;
}
.textbook-detail-info th {
    width: 30%;
    font-size: var(--font-size-small);
    text-align: left;
    border-left: none;
    border-right: none;
}
.textbook-detail-info td {
    width: 70%;
    text-align: left;
    padding: 4px;
    padding-right: 0;
    font-size: var(--font-size-small);
    color: black;
    border-left: none;
    border-right: none;
    text-decoration: none;
}
.part-info-checkbox:checked~.part-list,
.textbook-info-checkbox:checked~.textbook-detail-info {
    max-height: 60vh;
    height: auto;
    opacity: 1;
    visibility: visible;
    transition: 0.5s;
}
.part-list {
    text-align: start;
    padding-left: 16px;
    padding-right: 16px;
}
.part-list details {
    font-size: calc(var(--font-size) + 2px);
}
.part-list a {
    font-size: var(--font-size);
    margin-left: 24px;
    color: black;
}

.question-container-b-inner{
    width: 100%;
    overflow: scroll;
    margin-top: 8px;
}
.question-container-b-inner .block{
    width: 100%;
    min-height: 24px;
    display: flex;
    text-align: start;
    align-items: center;
    font-size: var(--font-size);
}
@media screen and (max-width: 480px) { 
    .question-container-b-inner .block{
        font-size: var(--font-size-small);
    }
}
.question-container-b-inner .c_block{
    white-space: nowrap;
    /* font-size: var(--font-size); */
}
.question-container-b-inner a {
    text-decoration: underline;
    color: blue;
    margin: 0;
}
.updated-date {
    width: 100%;
    margin-top: 8px;
    font-size: var(--font-size-small);
    color: rgb(108, 108, 108);
    text-align: end;
}


.answer-h {
    display: flex;
    width: 100%;
    border-bottom: var(--border-size);
    border-top: var(--border-size);
    padding: 4px 0;
    margin-bottom: 8px;
    font-size: var(--font-size);
}
.answer-h-left {
    margin: 0;
    font-size: 14px;
}
.answer-h-right {
    display: flex;
    margin-left: 8px;
}
.answer-h-right .occupation,
.answer-h-right .major {
    margin: 0 4px;
    font-size: var(--font-size-small);
    color: rgb(108, 108, 108);
}
.answer-f {
    width: 100%;
    border: var(--border-size);
    padding: 4px;
    margin-top: 4px;
    border-top-right-radius: 8px;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}
.answer-f-top {
    margin: 0;
    font-size: var(--font-size-small);
}
.answer-f-bottom {
    margin: 0;
    margin: 4px 8px;
    font-size: var(--font-size-small);
    white-space: pre-line;
}
.good-btn {
    padding: 6px 12px;
    border: var(--border-size);
    border-radius: 4px;
    /* background-color: aqua; */
    margin-right: auto;
    background-color: transparent;
}
.ad-space {
    margin-top: 8px;
}