.nav_block {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 24px 0;
    width: 250px;
    height: 644px;
    border: solid 1px var(--gray-C7C7CC);
    border-radius: 12px;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;

    position: sticky;
    top: 34px;
}
.nav_block::-webkit-scrollbar {   /* Hide Scroll Bar */
    display: none;
}
.drop_down_block {
    margin-left: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.drop_down_btn {
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}
.drop_down_p {
    margin: 0;
    font-size: 18px;
    line-height: 27px;
    font-weight: 500;
    color: var(--black-424245);
    transition: color 0.3s ease;
}
.drop_down_icon {
    margin-top: 1px;
    transition: transform 0.3s ease;
}
.drop_down_element {
    transition: fill 0.3s ease;
}
.drop_down_btn:hover .drop_down_p {
    color: var(--black);
}
.drop_down_btn:hover .drop_down_element {
    fill: var(--black);
}
.drop_down_list {
    list-style: none;
    margin: 8px 0 0 16px;
    padding: 0;
    display: none;
    opacity: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    max-height: 0px;
    transition: max-height 1s ease, opacity 0.3s ease;
}
.drop_down_list.active {
    max-height: 1000px;
    opacity: 1;
}
.drop_down_icon.rotate {
    transform: rotate(180deg);
}
.drop_down_list a {
    max-width: 210px;
    text-decoration: none;
    color: var(--gray-8E8E93);
    font-size: 17px;
    line-height: 26px;
    font-weight: 500;
    transition: color 0.3s ease;
}
.drop_down_list a:hover {
    color: var(--black);
}
.separator_line {
    width: 100%;
    min-height: 0.8px;
    height: 0.8px;
    background-color: var(--gray-D9D9D9);
    flex-shrink: 0;
}

.logout_block {
    margin: auto 0 0 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex-shrink: 0;

    max-height: 65px;
    gap: 14px;
}
.logout_btn {
    cursor: pointer;
    font-size: 18px;
    line-height: 27px;
    font-weight: 500;
    color: var(--black-424245);
    transition: color 0.3s ease; 
    border: 0;
    padding: 0;
    background-color: transparent;
    margin: 0 0 0 12px;
}
.logout_btn:hover {
    color: var(--black);
}

.drop_block {
    display: none;
    opacity: 0;
    max-height: 0;
    width: 100px;
    height: 100px;
    background-color: red;
    transition: opacity 1s ease, max-height 5s ease;
}
.drop_block.active {
    opacity: 1;
    max-height: 1000px;
}