.body-container-manual {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #ffffff;
}
.manual-container {
    display: flex;
    margin-top: 5px; 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.manual-sidebar {
    position: sticky; 
    top: 75px; 
    height: calc(100vh - 65px);
    width: 280px;
    flex-shrink: 0;
    background-color: #eaebed;
    color: #555555;
    padding: 25px;
    overflow-y: auto;
    border-right: 1px solid #495057;
}

.manual-sidebar h3 {
    margin-top: 0;
    border-bottom: 1px solid #495057;
    padding-bottom: 15px;
    font-size: 1.1em;
}

.manual-sidebar nav ul {
    list-style: none;
    padding: 0;
}

.manual-sidebar nav ul li {
    margin-bottom: 10px;
}

.manual-sidebar nav a {
    color: #1a1a1a;
    text-decoration: none;
    display: block;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.manual-sidebar nav a:hover {
    background-color: #3c3c3c;
    color: #FFFFFF;
}

.manual-sidebar nav ul ul {
    margin-top: 7px;
    padding-left: 10px;
    font-size: 0.9em;
}

.manual-content {
    margin-left: 100px; 
    padding: 25px 40px;
    width: 100%;
    max-width: 1000px; 
}

.manual-content section {
    margin-bottom: 50px;
    border-bottom: 1px solid #ffffff;
    padding-bottom: 25px;
}
.manual-content section:last-child {
    border-bottom: none;
}

.img-manual {
    max-width: 80%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.img-manual-b {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.img-manual-c {
    max-width: 40%;
    height: auto;
    display: block;
    margin: 0 auto;
}
.img-manual-d {
    max-width: 35%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.manual-content h1 {
    font-size: 2.5em;
    color: #212529;
    margin-bottom: 20px;
}

.manual-content h2 {
    font-size: 2em;
    color: #343a40;
    padding-bottom: 10px;
    margin-bottom: 25px;
    border-bottom: 2px solid #007bff; 
}

.manual-content h3 {
    font-size: 1.5em;
    color: #343a40;
    margin-top: 30px;
    margin-bottom: 15px;
}

.manual-content p, .manual-content li {
    line-height: 1.6;
    color: #495057;
    font-size: 1em;
}

.manual-content ul {
    padding-left: 20px;
}

.manual-content dl dt {
    font-weight: bold;
    color: #212529;
    font-size: 1.1em;
}

.manual-content dl dd {
    margin-left: 0;
    margin-bottom: 15px;
    padding-left: 20px;
    border-left: 3px solid #e9ecef;
}

.manual-content section,
.manual-content article,
.manual-content h4
 {
    scroll-margin-top: 85px; 
}