.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: var(--text-on-dark);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform var(--sidebar-transition), width var(--sidebar-transition);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.hidden {
    transform: translateX(-100%);
    display: flex !important; /* Keep as flex but move offscreen */
}

.sidebar-brand {
    padding: 2rem 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    border-bottom: 1px solid var(--bg-sidebar-active);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: var(--sidebar-width);
}

.sidebar.collapsed .sidebar-brand {
    padding: 2rem 1rem;
    justify-content: center;
    min-width: var(--sidebar-collapsed-width);
}

.brand-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity var(--sidebar-transition);
    white-space: nowrap;
}

.sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
    pointer-events: none;
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar.collapsed .sidebar-nav {
    padding: 1.5rem 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-on-dark-muted);
    text-decoration: none;
    transition: all var(--sidebar-transition);
    gap: 1rem;
    cursor: pointer;
    border: 1px solid transparent;
    white-space: nowrap;
}

.sidebar.collapsed .nav-item {
    padding: 0.75rem;
    justify-content: center;
    gap: 0;
}

.nav-item:hover {
    background-color: var(--bg-sidebar-hover);
    color: var(--text-on-dark);
}

.nav-item.active {
    background-color: var(--bg-sidebar-active);
    color: var(--text-on-dark);
    border-color: rgba(255,255,255,0.1);
}

.nav-item.active .nav-icon {
    color: var(--primary);
}

.nav-icon {
    font-size: 1.25rem;
    width: 24px;
    min-width: 24px;
    display: flex;
    justify-content: center;
    transition: color var(--sidebar-transition);
}

.nav-label {
    font-size: 0.9375rem;
    font-weight: 500;
    transition: opacity var(--sidebar-transition);
}

.sidebar.collapsed .nav-label {
    opacity: 0;
    width: 0;
    pointer-events: none;
    position: absolute;
}

.sidebar-footer {
    padding: 1.5rem 0.75rem;
    border-top: 1px solid var(--bg-sidebar-active);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar.collapsed .sidebar-footer {
    padding: 1.5rem 0.5rem;
}

.expand-collapse-btn {
    background: transparent;
    border: none;
    color: var(--text-on-dark-muted);
    cursor: pointer;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--sidebar-transition);
    font-size: 1rem;
}

.expand-collapse-btn:hover {
    background-color: var(--bg-sidebar-hover);
    color: var(--text-on-dark);
}

.sidebar.collapsed .expand-collapse-btn {
    transform: rotate(180deg);
}

.logout {
    color: var(--text-on-dark-muted);
}

.logout:hover {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Portal Header */
.portal-header {
    height: var(--header-height);
    background-color: var(--bg-card);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: var(--shadow-sm);
}

.portal-header.hidden {
    display: none !important;
}

.header-left h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#header-user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

#user-display {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

#status-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Profile Avatar */
.profile-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    overflow: hidden;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease;
}

.profile-avatar:hover {
    transform: scale(1.05);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
}

.sidebar-toggle-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    margin-right: 0.5rem;
    border-radius: var(--radius-md);
}

.sidebar-toggle-btn:hover {
    background-color: var(--bg-app);
}

/* Responsive Overrides */
@media (max-width: 768px) {
    .sidebar-toggle-btn {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .portal-header {
        margin-left: 0;
        padding: 0 1rem;
        position: fixed;
        width: 100%;
        box-sizing: border-box;
    }
}