/* ——— Sidebar ——— */
        .sidebar {
            --sidebar-font: 'Geist', 'Geist Fallback', system-ui, sans-serif;
            width: var(--sidebar-width);
            background: var(--sidebar);
            border-right: 1px solid var(--sidebar-separator);
            padding: 0;
            flex-shrink: 0;
            position: relative;
            z-index: 100;
            isolation: isolate;
            overflow: hidden;
            font-family: var(--sidebar-font);
            transition: width 0.25s var(--ease-out);
        }
        .sidebar.collapsed {
            width: var(--sidebar-collapsed-width);
        }
        .sidebar-brand h1,
        .sidebar-brand span,
        .nav-label {
            transition: opacity 0.2s, width 0.2s;
        }
        .sidebar.collapsed .sidebar-brand h1,
        .sidebar.collapsed .sidebar-brand span,
        .sidebar.collapsed .nav-label {
            opacity: 0;
            width: 0;
            min-width: 0;
            overflow: hidden;
            white-space: nowrap;
            padding: 0;
            margin: 0;
        }
        .sidebar.collapsed .sidebar-brand {
            padding: var(--space-12);
            margin: 0 var(--space-8) var(--space-12);
        }
        .sidebar.collapsed .nav-item {
            justify-content: center;
            padding: var(--space-12);
        }
        .sidebar.collapsed .nav-item .nav-icon {
            margin: 0;
        }
        .nav-label {
            transition: opacity 0.2s, width 0.2s;
        }
        .sidebar-collapse-handle {
            position: absolute;
            right: 0;
            top: 0;
            bottom: 0;
            width: 12px;
            border: none;
            border-left: 1px solid var(--sidebar-separator);
            background: transparent;
            color: var(--sidebar-foreground);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s, color 0.2s;
            z-index: 10;
        }
        .sidebar-collapse-handle:hover {
            background: var(--sidebar-inactive-icon);
            color: var(--sidebar-foreground);
        }
        .sidebar-collapse-icon {
            width: 12px;
            height: 12px;
            transition: transform 0.25s var(--ease-out);
        }
        .sidebar.collapsed .sidebar-collapse-icon {
            transform: rotate(180deg);
        }
        .sidebar::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 3px;
            background: var(--sidebar-separator);
            opacity: 0.8;
        }
        .sidebar-header {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: var(--space-8);
            padding: var(--space-16) var(--space-12) var(--space-12);
        }
        .sidebar-header .sidebar-brand {
            flex: 1;
            margin: 0;
            min-width: 0;
        }
        .sidebar.collapsed .sidebar-header {
            padding: var(--space-12) var(--space-8);
            justify-content: center;
        }
        .sidebar.collapsed .sidebar-header .sidebar-brand {
            display: none;
        }
        .sidebar-brand {
            position: relative;
            z-index: 1;
            padding: var(--space-16) var(--space-16) var(--space-16);
            margin: 0 var(--space-12) var(--space-16);
            background: var(--sidebar-brand-bg);
            border-radius: var(--radius);
            border: 1px solid var(--sidebar-separator);
        }
        .sidebar-brand h1 {
            font-size: var(--text-lg);
            font-weight: 700;
            color: var(--sidebar-foreground);
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .sidebar-brand span {
            display: inline-block;
            margin-top: var(--space-8);
            padding: var(--space-4) var(--space-12);
            background: rgba(255,255,255,0.15);
            color: var(--sidebar-foreground);
            font-size: var(--text-xs);
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            border-radius: var(--radius-sm);
            border: 1px solid var(--sidebar-border);
        }
        .nav-section {
            position: relative;
            z-index: 1;
            padding: 0 var(--space-12) var(--space-16);
            display: flex;
            flex-direction: column;
            gap: var(--space-4);
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: var(--space-12);
            width: 100%;
            padding: var(--space-12) var(--space-16);
            border: none;
            border-radius: 0;
            cursor: pointer;
            pointer-events: auto;
            user-select: none;
            color: var(--sidebar-foreground-dim);
            font-size: var(--text-sm);
            font-weight: 500;
            font-family: var(--sidebar-font);
            background: transparent;
            text-align: left;
            transition: background 0.2s, color 0.2s;
            margin-bottom: 0;
            position: relative;
            border-left: 3px solid transparent;
        }
        .nav-item .nav-icon {
            width: 28px;
            height: 28px;
            min-width: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .nav-item svg {
            width: 18px;
            height: 18px;
            opacity: 0.9;
            stroke: currentColor;
        }
        .nav-item:hover {
            background: var(--sidebar-accent);
            color: var(--sidebar-foreground);
        }
        .nav-item:focus-visible {
            outline: 2px solid var(--sidebar-ring);
            outline-offset: 2px;
        }
        .nav-item:hover .nav-icon {
            background: rgba(255,255,255,0.06);
        }
        .nav-item.active {
            background: var(--sidebar-active-bg);
            color: #FFFFFF;
            font-weight: 600;
            border-left-color: var(--sidebar-active-accent);
        }
        .nav-item.active .nav-label {
            font-size: var(--text-sm);
            letter-spacing: 0.01em;
        }
        .nav-item.active .nav-icon {
            background: rgba(255,255,255,0.12);
            color: #FFFFFF;
            box-shadow: none;
        }
        .nav-item.active .nav-icon svg {
            opacity: 1;
            stroke: #FFFFFF;
        }
        /* ——— Main content ——— */
        .main {
            flex: 1;
            min-width: 0;
            min-height: 0;
            overflow-y: auto;
            overflow-x: hidden;
            scrollbar-gutter: stable;
            background: var(--bg);
            position: relative;
            z-index: 0;
        }
        .main-inner {
            max-width: 1600px;
            margin: 0 auto;
            padding: var(--space-24);
            width: 100%;
        }
        .page { display: none; }
        .page.active { display: block; }
        .page-header {
            margin-bottom: var(--space-24);
            padding-bottom: var(--space-16);
            border-bottom: 1px solid var(--border-soft);
        }
        .page-header.has-date-range { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-12); }
        .overview-controls { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-16); }
        .main .page-title {
            font-size: var(--text-xl);
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .main .page-subtitle {
            font-size: var(--text-sm);
            color: var(--text-tertiary);
            margin-top: var(--space-8);
            line-height: 1.5;
            max-width: 56ch;
        }