.edu-split-layout {
    display: flex;
    align-items: flex-start;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--white);
    border: 1px solid #e1dfdd;
    border-radius: var(--border-radius);
}   
.edu-sidebar {
    height: 100%;
    width: 320px;
    flex-shrink: 0;
    border-right: 1px solid #e1dfdd;
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}
.edu-guides-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
}
.edu-guide-item {
    padding: 20px 25px;
    cursor: pointer;
    border-bottom: 1px solid #f3f2f1;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-color);
    transition: all 0.2s ease;
    line-height: 1.4;
}
.edu-guide-item:hover,
.edu-guide-item.active {
    color: var(--primary-color);
    background-color: #f8f9fa;
    border-left: 4px solid var(--primary-color);
    padding-left: 21px;
}
.edu-main-content {
    flex: 1;
    background-color: #faf9f8;
    height: 100%;
    overflow: hidden;
}
.edu-content-scroll-container {
    height: 100%;
    padding: 50px;
    overflow-y: auto;
    box-sizing: border-box;
    overscroll-behavior: contain;
}
.edu-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #a19f9d;
}
.edu-placeholder svg {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    opacity: 0.4;
}
.edu-guide-content {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
    max-width: none !important;
    width: 100% !important;
}
.edu-guide-content.active {
    display: block;
}
.edu-content-scroll-container:has(.edu-guide-content.active) .edu-placeholder {
    display: none;
}
.edu-guide-content h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 25px;
    font-weight: 600;
    border-bottom: 2px solid #e1dfdd;
    padding-bottom: 15px;
}
.edu-guide-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #444;
    text-align: justify;
    margin-bottom: 20px;
}
.edu-guide-content p:first-of-type {
    font-size: 1.05rem;
    color: #444;
    font-weight: 400;
}
.edu-guide-content ul {
    list-style-type: disc;
    padding-left: 25px;
    margin-top: 10px;
    margin-bottom: 20px;
}
.edu-guide-content li {
    font-size: 1.05rem;
    line-height: 1.7;
    color: #444;
    margin-bottom: 8px;
    text-align: left;
}
.edu-guide-content strong {
    color: #222;
}
body.dark-theme .edu-split-layout,
body.dark-theme .edu-sidebar,
body.dark-theme .edu-main-content {
    background-color: var(--bg-color);
    border-color: var(--border-color);
}
body.dark-theme .edu-guide-item {
    border-color: var(--border-color);
    color: #fff;
}
body.dark-theme .edu-guide-item:hover,
body.dark-theme .edu-guide-item.active {
    background-color: #2c2c2c;
}
.edu-toc-container {
    background-color: #f3f2f1;
    border-left: 4px solid var(--primary-color);
    padding: 20px 25px;
    margin: 30px 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}
.edu-toc-heading {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-top: 0;
    margin-bottom: 15px;
}
.edu-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.edu-toc-link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s ease;
}
.edu-toc-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}
#guide_1_intro_sec,
#guide_2_intro_sec {
    margin-top: 10px;
    margin-bottom: 40px;
}
.edu-sections-wrapper {
    margin-top: 50px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.edu-guide-image {
    width: 100%;
    height: auto;
    display: block;
    margin: 15px 0 20px 0;
    border-radius: 8px;
    object-fit: cover;
}
.edu-guide-image {
    width: 100%;
    height: auto;
    display: block;
    margin: 15px 0 20px 0;
    border-radius: 8px;
    object-fit: cover;
}
.edu-guide-section {
    scroll-margin-top: 130px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e1dfdd;
}
.edu-guide-section:last-of-type {
    border-bottom: none;
}
.edu-guide-section h4 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin-top: 0;
    margin-bottom: 15px;
    font-weight: 600;
}
.edu-guide-section p,
.edu-guide-section div {
    font-size: 1.05rem;
    line-height: 1.7;
    color: #444;
    margin: 0;
}
body.dark-theme .edu-guide-section div {
    color: #dadada;
}
body.dark-theme .edu-toc-container {
    background-color: #252423;
}
body.dark-theme .edu-guide-section {
    border-color: var(--border-color);
}
body.dark-theme .edu-guide-section p {
    color: #dadada;
}
@media screen and (max-width: 992px) {
    .edu-container, 
    .edu-wrapper, 
    .edu-layout,
    .edu-content-wrapper,
    .edu-split-layout {
        flex-direction: column !important;
        height: calc(100dvh - 60px) !important;
        overflow: hidden !important;
        display: flex !important;
    }
    .edu-sidebar,
    .edu-menu,
    .edu-guide-list-container {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        flex-shrink: 0 !important;
        border-right: none !important;
        border-bottom: 2px solid var(--border-color, #e0e0e0) !important;
        padding: 15px 10px !important;
    }
    .edu-content-display,
    .edu-display-area,
    .edu-main-content {
        width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
        height: 100% !important;
        flex: 1 !important;
        overflow: hidden !important;
    }
    .edu-content-scroll-container {
        height: 100% !important;
        padding: 20px !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }
    .edu-sections-wrapper {
        margin-top: 30px !important;
        gap: 25px !important;
    }
    .edu-guide-section h4 {
        font-size: 1.2rem !important;
        margin-bottom: 10px !important;
    }
    .edu-guide-section div,
    .edu-guide-section p {
        font-size: 0.95rem !important;
        line-height: 1.5 !important;
    }
    .edu-toc-container {
        padding: 15px !important;
        margin-bottom: 20px !important;
    }
    .edu-guide-image {
        margin: 10px 0 15px 0 !important;
        border-radius: 6px !important;
    }
}
@media screen and (max-width: 992px) {
    .edu-guide-content {
        display: none !important;
    }
    .edu-guide-content.active {
        display: block !important;
    }
}