.page-container {
    display: flex;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.sidebar {
    width: 280px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid #f0f0f0;
}

.header-icon {
    font-size: 20px;
    overflow: hidden;
    border-radius: 12px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.header-icon img{
    width: 100%;
    height: 100%;
}
.header-title {
    font-size: 15px;
    font-weight: 600;
    color: #333;
}

.sidebar-nav {
    padding: 12px 0;
}

.nav-item {
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 25px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.nav-item:hover {
    background-color: #f5f5f5;
}

.nav-item.active {
    background-color: #f0f2f5;
}

.nav-arrow {
    /* width: 0;
    height: 0;
    border-left: 4px solid #999;
    border-top: 3px solid transparent;
    border-bottom: 3px solid transparent; */
    width: 8px;
    height: 2px;
    background-color: #7b7b7b;
}

.nav-text {
    font-size: 14px;
    color: #333;
}

.main-content {
    flex: 1;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    min-width: 0;
}

.content-header {
    background-color: #7D0000;
    color: white;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 600;
}

.content-body {
    padding: 20px;
}

.section {
    margin-bottom: 24px;
}

.section:last-child {
    margin-bottom: 0;
}

.section-header {
    display: flex;
    gap: 11px;
    align-items: center;
    padding: 8px 0;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: #000;
    border-bottom: 1px solid #f0f0f0;
}

.section-toggle {
    font-size: 16px;
    font-weight: normal;
    width: 0;
    height: 0;
    border-top: 4px solid #000;
    border-left: 3px solid transparent;
    border-right: 3px solid transparent;
}

.section-content {
    padding: 12px 0;
    max-height: 500px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.file-item:hover {
    background-color: #f5f5f5;
}

.file-item.active {
    background-color: #f5f7fa;
}

.file-icon {
    font-size: 16px;
}

.file-name {
    font-size: 13px;
    color: #333;
}
.section-header.active .section-toggle{
    transform: rotate(180deg);
}
.alertBtn{
    width: 90%;
    border-radius: 12px;
    padding: 8px 30px;
    background-color: #7D0000;
    color: #fff;
    margin: 30px auto 0;
    font-size: 16px;
    text-align: center;
    cursor: pointer;
}
@media screen and (max-width: 768px){
    .page-container{
        flex-direction: column;
    }
    .sidebar{
        width: 100%;
    }
}