#cs-sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    width: 140px;
    height: calc(100vh - 70px);
    background: #fff;
    box-shadow: 1px 1px 6px rgba(0,0,0,0.1);
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    padding: 8px 6px 40px 6px;
    box-sizing: border-box;
    overflow-y: auto;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: width 0.3s ease, padding 0.3s ease;
    z-index: 9999;
    display: flex;
    flex-direction: column;
}

#cs-sidebar.collapsed {
    width: 30px;
    padding: 8px 3px 40px 3px;
}

#cs-sidebar h3 {
    font-size: 14px;
    margin-bottom: 10px;
    color: #333;
    user-select: none;
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
}

#cs-sidebar.collapsed h3 {
    opacity: 0;
    height: 0;
    margin: 0;
    padding: 0;
    pointer-events: none;
}

#cs-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
    flex-grow: 1;
    overflow-y: auto;
}

#cs-sidebar.collapsed ul {
    display: none;
}

#cs-sidebar ul li {
    display: block;
    margin: 0;
    padding: 10px 0;
    border-bottom: 1px solid #ddd; /* Горизонтальный делитель */
    user-select: none;
}

#cs-sidebar ul li:last-child {
    border-bottom: none;
}

#cs-sidebar ul li a.thumb {
    display: block;
    width: 100%;
    height: auto;
    overflow: hidden;
    border-radius: 6px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
    /* Убираем масштабирование при наведении */
    transition: none;
}

#cs-sidebar ul li a.thumb img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

#cs-sidebar ul li a.title {
    display: block;
    margin-top: 6px;
    color: #006699;
    font-weight: 600;
    font-size: 13px;
    text-decoration: none;
    line-height: 1.3;
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
}

#cs-sidebar ul li a.title:hover {
    color: #003355;
}

/* Кнопка сворачивания внизу справа, липкая */
#cs-sidebar-toggle {
    position: sticky;
    bottom: 10px;
    margin-left: auto;
    width: 25px;
    height: 25px;
    background-color: #006699;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    user-select: none;
    transition: background-color 0.3s ease;
}

#cs-sidebar-toggle:hover {
    background-color: #004466;
}

/* Адаптив */

@media (max-width: 768px) {
    #cs-sidebar {
        width: 120px;
    }
    #cs-sidebar.collapsed {
        width: 30px;
    }
    #cs-sidebar ul li a.title {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    #cs-sidebar {
        display: none;
    }
}