/* Sidebar + Topbar + Main layout */

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: width var(--transition-base), transform var(--transition-base);
    overflow: hidden;
}

.sidebar-header {
    padding: var(--space-lg) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    border-bottom: 1px solid var(--border);
    min-height: var(--topbar-height);
}

.sidebar-header .logo-img {
    height: 28px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-sm);
    overflow-y: auto;
}

.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: var(--text-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
}

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

.sidebar-nav .nav-item.active {
    background: var(--blue-light);
    color: var(--blue-text);
}

.sidebar-nav .nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-nav .nav-item .nav-label {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav .nav-section-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-md) 0.75rem var(--space-xs);
    white-space: nowrap;
}

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

.sidebar-footer .nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: var(--text-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.sidebar-footer .nav-item:hover {
    background: var(--red-bg);
    color: var(--red);
}

.sidebar-footer .nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Collapsed state */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-section-label {
    display: none;
}

.sidebar.collapsed .logo-img {
    height: 22px;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: var(--space-lg) var(--space-sm);
}

.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 0.5rem;
}

.sidebar.collapsed .sidebar-footer .nav-item {
    justify-content: center;
    padding: 0.5rem;
}

/* ── Main wrapper ───────────────────────────────────────── */
.main-wrapper {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-base);
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed ~ .main-wrapper,
.main-wrapper.collapsed {
    margin-left: var(--sidebar-collapsed-width);
}

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar .breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-md);
    color: var(--text-muted);
}

.topbar .breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
}

.topbar .breadcrumbs a:hover {
    color: var(--text-primary);
}

.topbar .breadcrumbs .separator {
    color: var(--text-dim);
}

.topbar .breadcrumbs .current {
    color: var(--text-primary);
    font-weight: 500;
}

.topbar .sse-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.topbar .user-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-md);
    color: var(--text-muted);
}

.topbar .sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
}

.topbar .sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.topbar .sidebar-toggle svg {
    width: 20px;
    height: 20px;
}

/* ── Page content ───────────────────────────────────────── */
.page-content {
    flex: 1;
    padding: var(--space-xl);
    max-width: 1400px;
    width: 100%;
}

/* ── Mobile sidebar overlay ─────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 90;
}

.sidebar-overlay.visible {
    display: block;
}