#back-sidebar-trigger {
    position: fixed;
    top: 0;
    left: 0;
    padding-right: 30px;
    height: 100vh;
    z-index: 999999;
    cursor: default;
}

#back-sidebar {
    position: relative;
    width: 20px;
    height: 100%;
    background-color: transparent;
    border-right: 3px solid var(--accent2);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: width 0.3s ease-in-out, background-color 0.2s ease-in-out, border-color 0.1s ease-in-out;
    cursor: pointer;
}

#back-sidebar-trigger:hover #back-sidebar {
    width: 45px;
    background-color: var(--surface);
    border-left: 0 solid transparent;
    border-right: 2px solid var(--accent2);
}

#back-sidebar .back-text {
    color: var(--text);
    font-family: "Rubik", sans-serif;
    font-weight: 900;
    font-size: 14px;
    letter-spacing: 0.15em;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease-in-out;
}

#back-sidebar-trigger:hover .back-text {
    opacity: 1;
    transition-delay: 0.15s;
}