.video-page-title-header {
    position: relative;
    padding: 2rem 0;
    background-image: url(../../images/video/video_banner_bg.jpg);
    background-size: auto;
    min-height: 140px;
    overflow: hidden;
}
.video-page-title-header > img {
    height: 100%;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}
.category-item>.category-img div.video {
    position: relative;
}
.category-item>.category-img div.video::after {
    content: "\f144";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #04cdd2;
    font-size: 2rem;
    clip-path: circle(38% at 50% 50%);
    background-color: white;
}
.category-item>.category-img div.video::before {
    content: "";
    position: absolute;
    top: 0%;
    left: 0%;
    width: 100%;
    height: 100%;
    background-color: rgba(255,255,255,0.1);
}
.aspect-ratio-1 {
    aspect-ratio: 1 / 1!important;
}

.timecode {
    position: absolute;
    bottom: 0;
    right: 0;
    color: #ffffff;
    background-color: #0000007a;
    font-size: 15px;
}

#video_leftmenu {
    border-top: 10px solid var(--main-bg-dark-color);
    border-bottom: 10px solid var(--main-bg-text-color);
    height: fit-content;
}

#video_leftmenu .border-left {
    border-left: 1px solid #dee2e6;
}

#video_leftmenu .accordion-button:not([data-bs-toggle])::after {
    content: none;
}

#video_leftmenu .accordion-button:not(.collapsed) {
    background-color: var(--main-bg-color);
    color: #ffffff;
    border-color: var(--main-bg-color);
}
.item-list {
    border: 0;
}
.item-list>.category-item>.category-img {
    display: none;
}

.category-item>.category-item-content small {
    font-size: 14px;
    color: gray;
}

.category-item>.category-item-content .keyword {
    -webkit-line-clamp: 1;
    line-clamp: 1;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.elementary1-2 {
    background-color: #e5f2f1;
    color: #006b5d;
}
.elementary3-4 {
    background-color: #e5f2f6;
    color: #007099;
}
.elementary5-6 {
    background-color: #faece5;
    color: #bd3c00;
}
.junior-high {
    background-color: #f5f0e6;
    color: #8f5f00;
}
.senior-high {
    background-color: #f6e6f9;
    color: #9e00c1;
}
.teacher {
    background-color: #eef2e6;
    color: #4d7000;
}

#listModal iframe {
    height: 35rem;
}

.accordion-button {
    padding: 0;
    display: flex;
    align-items: stretch;
}

.accordion-link {
    flex: 1;
    padding: 0.5rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
}

.accordion-link:hover {
    background-color: rgba(0, 123, 255, 0.1);
    color: inherit;
    text-decoration: none;
}

.accordion-toggle-area {
    width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.accordion-toggle-area:hover {
    background-color: rgba(40, 167, 69, 0.1);
}

/* 將原本的箭頭移到 toggle-area */
.accordion-button::after {
    position: absolute;
    right: 12px;
    top:10px;
    pointer-events: none;
}