.left-menu {
    flex: 0 0 var(--office-sidebar-w);
    width: var(--office-sidebar-w);
    background: var(--office-surface);
    border: 1px solid var(--office-border);
    border-radius: var(--office-radius);
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    align-self: stretch;
}

.left-menu-nav {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 0.25rem;
}

.left-menu-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    width: 100%;
    min-height: 44px;
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: var(--office-radius-sm);
    background: transparent;
    color: var(--office-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: color var(--office-transition), background var(--office-transition);
}

.left-menu-item:hover {
    color: var(--office-text);
    background: var(--office-surface-2);
}

.left-menu-item:focus-visible {
    outline: 2px solid var(--office-accent);
    outline-offset: 2px;
}

.left-menu-item.active {
    color: var(--office-text);
    background: rgba(59, 130, 246, 0.14);
}

.left-menu-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.35rem;
    bottom: 0.35rem;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--office-accent);
}

.left-menu-item--market.active::before {
    background: var(--office-market);
}

.left-menu-item--market.active {
    background: rgba(217, 59, 112, 0.12);
}

.left-menu-item-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: inherit;
}

.left-menu-item-label {
    flex: 1;
    min-width: 0;
}

.left-menu-item-badge {
    display: none;
    min-width: 1.125rem;
    height: 1.125rem;
    padding: 0 0.3rem;
    margin-left: auto;
    flex-shrink: 0;
    border-radius: 999px;
    background: rgba(99, 140, 255, 0.28);
    color: rgba(220, 228, 255, 0.95);
    border: 1px solid rgba(120, 155, 255, 0.45);
    font-size: 0.625rem;
    font-weight: 600;
    line-height: 1.05rem;
    text-align: center;
    letter-spacing: 0.01em;
}

.left-menu-item-badge.is-visible {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.left-menu-close {
    display: none;
    margin-left: auto;
    border: none;
    background: transparent;
    color: var(--office-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
}

@media (max-width: 768px) {
    .left-menu {
        position: fixed;
        top: var(--office-header-h);
        left: 0;
        bottom: 0;
        z-index: 100;
        width: min(280px, 88vw);
        border-radius: 0;
        border-left: none;
        border-top: none;
        border-bottom: none;
        transform: translateX(-105%);
        transition: transform var(--office-transition);
    }

    .left-menu.is-open {
        transform: translateX(0);
    }

    .left-menu-close {
        display: block;
    }
}