.layout .sidebar-left {
    position: sticky;
    top: 64px;

    height: calc(100vh - 64px);

    display: flex;
    flex-direction: column;

    box-sizing: border-box;

    padding: 24px 16px;

    overflow-y: auto;

    background: var(--bg-surface);
    border-right: 1px solid var(--border-subtle);
}

.layout .sidebar-left .sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 28px;

    flex: 1;
}

.layout .sidebar-left .nav-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.layout .sidebar-left .nav-section-title {
    color: var(--text-muted);

    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.layout .sidebar-left .nav-list {
    display: flex;
    flex-direction: column;
    gap: 2px;

    margin: 0;
    padding: 0;

    list-style: none;
}

.layout .sidebar-left .nav-item {
    margin: 0;
    padding: 0;
}

.layout .sidebar-left .nav-link {
    position: relative;

    display: flex;
    align-items: center;

    min-height: 34px;
    padding: 0 10px;

    border: 1px solid transparent;
    border-radius: 4px;

    color: var(--text-secondary);
    text-decoration: none;

    transition:
        color 150ms ease,
        background 150ms ease,
        border-color 150ms ease,
        box-shadow 150ms ease;
}

.layout .sidebar-left .nav-link-icon {
    width: 18px;

    color: var(--text-muted);
    font-size: 14px;
    line-height: 1;

    transition:
        color 150ms ease,
        transform 150ms ease;
}

.layout .sidebar-left .nav-link-text {
    min-width: 0;

    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;

    font-size: 16px;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.layout .sidebar-left .nav-link-count {
    margin-left: auto;

    color: var(--text-muted);
    font-size: 9px;
    font-weight: 400;
    font-variant-numeric: tabular-nums;

    transition: color 150ms ease;
}

.layout .sidebar-left .nav-link:hover {
    color: var(--text-primary);
    background: rgba(0, 229, 255, 0.035);
    border-color: rgba(0, 229, 255, 0.12);
}

.layout .sidebar-left .nav-link:hover .nav-link-icon {
    color: var(--neon-cyan);
    transform: translateX(2px);
}

.layout .sidebar-left .nav-link:hover .nav-link-count {
    color: var(--text-secondary);
}

.layout .sidebar-left .nav-link.active {
    color: var(--neon-green);
    background: rgba(0, 255, 136, 0.055);
    border-color: rgba(0, 255, 136, 0.16);

    box-shadow:
        inset 0 0 20px rgba(0, 255, 136, 0.025),
        0 0 12px rgba(0, 255, 136, 0.035);
}

.layout .sidebar-left .nav-link.active::before {
    content: "";

    position: absolute;
    top: 7px;
    bottom: 7px;
    left: -1px;

    width: 2px;

    background: var(--neon-green);

    box-shadow:
        0 0 6px var(--neon-green),
        0 0 12px rgba(0, 255, 136, 0.45);
}

.layout .sidebar-left .nav-link.active .nav-link-icon {
    color: var(--neon-green-bright);
}

.layout .sidebar-left .nav-link.active .nav-link-count {
    color: var(--neon-green-dark);
}

.layout .sidebar-left .sidebar-status {
    display: flex;
    flex-direction: column;
    gap: 12px;

    margin-top: 20px;
    padding: 12px 8px 0;

    border-top: 1px solid var(--border-subtle);
}

.layout .sidebar-left .sidebar-status-main {
    display: flex;
    align-items: center;
    gap: 7px;
}

.layout .sidebar-left .sidebar-status-indicator {
    width: 5px;
    height: 5px;

    flex-shrink: 0;

    border-radius: 50%;

    background: var(--neon-green);

    box-shadow:
        0 0 5px var(--neon-green),
        0 0 10px rgba(0, 255, 136, 0.4);
}

.layout .sidebar-left .sidebar-status-content {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.layout .sidebar-left .sidebar-status-label {
    color: var(--text-muted);

    font-size: 9px;
    font-weight: 500;

    line-height: 1.2;
    letter-spacing: 0.1em;
}

.layout .sidebar-left .sidebar-status-value {
    color: var(--neon-green-dark);

    font-size: 9px;
    font-weight: 600;

    line-height: 1.2;
    letter-spacing: 0.08em;
}

.layout .sidebar-left .sidebar-uptime {
    display: flex;
    align-items: center;
    justify-content: space-between;

    padding-left: 12px;
}

.layout .sidebar-left .sidebar-uptime-label {
    color: var(--text-muted);

    font-size: 12px;
    font-weight: 500;

    letter-spacing: 0.1em;
}

.layout .sidebar-left .sidebar-uptime-value {
    color: var(--text-disabled);

    font-size: 12px;
    font-weight: 500;

    letter-spacing: 0.04em;

    font-variant-numeric: tabular-nums;
}