.app-layout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.sidebar.collapsed {
    transform: translateX(-100%);
    position: absolute;
    z-index: 100;
    height: 100%;
}

.sidebar-header {
    padding: 12px;
    border-bottom: 1px solid var(--border);
}

.btn-new-chat {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 13px;
    transition: all var(--transition);
}

.btn-new-chat:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

/* Section navigation */
.sidebar-nav {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
}

.nav-section {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
}

.nav-section:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-section.active {
    background: var(--primary);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
}

.nav-section svg {
    flex-shrink: 0;
}

.sidebar-conversations {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.conversation-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: 2px;
    position: relative;
}

.conversation-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.conversation-item.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.conversation-item .conv-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.conversation-item .conv-type-icon {
    margin-right: 8px;
    flex-shrink: 0;
    opacity: 0.5;
}

.conversation-item .conv-delete {
    display: none;
    color: var(--text-muted);
    padding: 2px;
    border-radius: 4px;
}

.conversation-item:hover .conv-delete {
    display: flex;
}

.conversation-item .conv-delete:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

.user-name {
    font-size: 13px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.user-role-badge {
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
    font-weight: 600;
    white-space: nowrap;
}

.sidebar-actions {
    display: flex;
    gap: 4px;
}

.sidebar-actions .btn-icon {
    flex: 1;
}