:root {
    /* Core spacing scale */
    --node-editor-space-xs: 4px;
    --node-editor-space-sm: 8px;
    --node-editor-space-md: 12px;
    --node-editor-space-lg: 16px;
    --node-editor-space-xl: 24px;
    --node-editor-space-xxl: 32px;

    /* Layout spacing */
    --node-editor-control-padding: var(--node-editor-space-sm) var(--node-editor-space-lg);

    /* Inspector spacing system */
    --node-editor-inspector-space-xs: var(--node-editor-space-xs);
    --node-editor-inspector-space-sm: var(--node-editor-space-sm);
    --node-editor-inspector-space-md: var(--node-editor-space-md);
    --node-editor-inspector-space-lg: var(--node-editor-space-lg);
    --node-editor-inspector-space-xl: var(--node-editor-space-xl);
    --node-editor-inspector-space-xxl: var(--node-editor-space-xxl);
    --node-editor-inspector-content-padding: var(--node-editor-inspector-space-md);
    --node-editor-inspector-header-padding-top: var(--node-editor-inspector-space-md);
    --node-editor-inspector-header-padding-bottom: var(--node-editor-inspector-space-xs);
    --node-editor-inspector-header-gap: var(--node-editor-inspector-space-sm);
    --node-editor-inspector-section-gap: var(--node-editor-inspector-space-md);
    --node-editor-inspector-field-gap: var(--node-editor-inspector-space-sm);
    --node-editor-inspector-inline-gap: var(--node-editor-inspector-space-sm);
    --node-editor-inspector-empty-padding-vertical: var(--node-editor-inspector-space-xxl);
    --node-editor-inspector-empty-padding-horizontal: var(--node-editor-inspector-space-lg);
    --node-editor-inspector-input-padding: var(--node-editor-space-xs) var(--node-editor-space-sm);

    /* Inspector typography */
    --node-editor-inspector-font-size-title: 0.75rem;
    --node-editor-inspector-line-height-title: 1.333;
    --node-editor-inspector-font-size-body: 0.875rem;
    --node-editor-inspector-line-height-body: 1.5;
    --node-editor-inspector-font-size-meta: 0.75rem;
    --node-editor-inspector-line-height-meta: 1.333;
    --node-editor-inspector-font-weight-medium: 600;
    --node-editor-inspector-font-size-heading: 1rem;
    --node-editor-inspector-font-size: var(--node-editor-inspector-font-size-body);
    --node-editor-inspector-line-height: var(--node-editor-inspector-line-height-body);

    /* Font families & typography */
    --node-editor-theme-default-font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
    --node-editor-theme-control-font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
    --node-editor-theme-label-font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
    --node-editor-system-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
    --node-editor-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    --node-editor-title-font: 600 0.875rem/1.5 var(--node-editor-theme-label-font-family);
    --node-editor-subtitle-font: 500 0.875rem/1.5 var(--node-editor-theme-label-font-family);
    --node-editor-caption-font: 400 0.75rem/1.333 var(--node-editor-theme-default-font-family);
    --node-editor-control-text-font: 500 var(--node-editor-inspector-font-size-body) / 1.5 var(--node-editor-theme-control-font-family);
    --node-editor-input-font: 400 var(--node-editor-inspector-font-size-body) / 1.5 var(--node-editor-theme-default-font-family);
    --node-editor-font-size-lg: 1.125rem;
    --node-editor-font-size-sm: 0.875rem;
    --node-editor-font-size-xs: 0.75rem;

    /* Canvas grid */
    --node-editor-grid-color: #37352f;
    --node-editor-grid-opacity: 0.09;

    /* Shadow system */
    --node-editor-shadow-sm: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 2px 4px;
    --node-editor-shadow-md: rgba(15, 15, 15, 0.05) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 3px 6px, rgba(15, 15, 15, 0.2) 0px 9px 24px;
    --node-editor-shadow-lg: rgba(15, 15, 15, 0.05) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 5px 10px, rgba(15, 15, 15, 0.2) 0px 15px 40px;

    /* Transition system */
    --node-editor-transition-duration: 0.1s;

    /* Inspector shadows */
    --node-editor-inspector-shadow: inset 1px 0 0 0 rgba(0, 0, 0, 0.06);
    --node-editor-inspector-header-shadow: 0 1px 0 rgba(55, 53, 47, 0.09);

    /* Tree & List Components */
    --node-editor-tree-item-height: 28px;
    --node-editor-tree-indent: 20px;

    /* Control Buttons */
    --node-editor-control-button-size-sm: 20px;
    --node-editor-control-button-size: 24px;

    /* Icons */
    --node-editor-icon-size-sm: 16px;
    --node-editor-icon-selected-brightness: 1;

    /* Text colors */
    --node-editor-text-color: #37352f;
    --node-editor-text-secondary: rgba(55, 53, 47, 0.65);
    --node-editor-header-text-color: #37352f;
    --node-editor-label-color: var(--node-editor-text-color);
    --node-editor-secondary-label-color: rgba(55, 53, 47, 0.65);
    --node-editor-tertiary-label-color: rgba(55, 53, 47, 0.45);
    --node-editor-quaternary-label-color: rgba(55, 53, 47, 0.35);
    --node-editor-control-text-color: #37352f;
    --node-editor-control-text-color-primary: #ffffff;
    --node-editor-control-text-color-secondary: rgba(55, 53, 47, 0.65);
    --node-editor-control-hover-text-color-primary: #ffffff;
    --node-editor-input-text-color: #37352f;
    --node-editor-selected-control-text-color: #2eaadc;
    --node-editor-selected-menu-item-text-color: #37352f;

    /* Status & accent colors */
    --node-editor-accent-color: #2eaadc;
    --node-editor-accent-color-hover: #0091ca;
    --node-editor-color-primary: #2eaadc;
    --node-editor-keyboard-focus-indicator-color: rgba(46, 170, 220, 0.4);
    --node-editor-success-color: #0b6e4f;
    --node-editor-warning-color: #dfab01;
    --node-editor-caution-color: #e03e3e;
    --node-editor-caution-hover-background: rgba(224, 62, 62, 0.1);
    --node-editor-system-orange-color: #d9730d;
    --node-editor-system-red-color: #e03e3e;
    --node-editor-connection-color: #9b9a97;

    /* Surface colors */
    --node-editor-surface-primary: #ffffff;
    --node-editor-surface-secondary: #f7f7f5;
    --node-editor-surface-tertiary: #f1f1ef;
    --node-editor-selected-content-background-color: rgba(46, 170, 220, 0.1);
    --node-editor-selected-control-color: rgba(55, 53, 47, 0.08);
    --node-editor-under-page-background-color: #ffffff;
    --node-editor-window-background-color: #ffffff;
    --node-editor-background-surface: #ffffff;

    /* Control surfaces */
    --node-editor-control-background: transparent;
    --node-editor-control-background-primary: #2eaadc;
    --node-editor-control-background-secondary: rgba(55, 53, 47, 0.06);
    --node-editor-control-hover-background: rgba(55, 53, 47, 0.08);
    --node-editor-control-hover-background-primary: #0091ca;
    --node-editor-hover-background: rgba(55, 53, 47, 0.08);
    --node-editor-control-box-shadow-primary: 0 1px 2px rgba(0, 0, 0, 0.1);
    --node-editor-control-box-shadow-secondary: inset 0 0 0 1px rgba(55, 53, 47, 0.16);
    --node-editor-disabled-control-text-color: rgba(55, 53, 47, 0.3);

    /* Input surfaces */
    --node-editor-input-background: rgba(242, 241, 238, 0.6);
    --node-editor-input-border: 1px solid rgba(55, 53, 47, 0.16);
    --node-editor-input-border-hover: rgba(55, 53, 47, 0.3);
    --node-editor-input-box-shadow: none;
    --node-editor-input-padding: 4px 8px;

    /* Card & panel styling */
    --node-editor-card-border-color: rgba(55, 53, 47, 0.09);
    --node-editor-card-border: 1px solid var(--node-editor-card-border-color);
    --node-editor-card-border-radius: 3px;
    --node-editor-card-box-shadow: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 2px 4px;
    --node-editor-card-hover-box-shadow: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.2) 0px 4px 8px;
    --node-editor-card-elevated-box-shadow: rgba(15, 15, 15, 0.05) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 5px 10px, rgba(15, 15, 15, 0.2) 0px 15px 40px;
    --node-editor-card-focus-box-shadow: 0 0 0 2px rgba(46, 170, 220, 0.4);
    --node-editor-card-disabled-background: #f7f7f5;
    --node-editor-card-filled-background: #f7f7f5;
    --node-editor-card-filled-hover-background: #efefed;
    --node-editor-card-hover-border-color: rgba(55, 53, 47, 0.16);

    /* Dialogs & overlays */
    --node-editor-dialog-background: #ffffff;
    --node-editor-dialog-box-shadow: rgba(15, 15, 15, 0.05) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 5px 10px, rgba(15, 15, 15, 0.2) 0px 15px 40px;
    --node-editor-dialog-level-elevation: 1000;

    /* Scrollbars */
    --node-editor-scroll-bar-thumb-color: rgba(55, 53, 47, 0.16);
    --node-editor-active-scroll-bar-thumb-color: rgba(55, 53, 47, 0.24);

    /* Selected State Colors */
    --node-editor-selected-secondary-color: #2eaadc;
    --node-editor-selected-hover-background: rgba(46, 170, 220, 0.1);

    /* Tables & list accents */
    --node-editor-table-header-background-color: #f7f7f5;
    --node-editor-table-header-background-color-hover: #efefed;
    --node-editor-table-header-background-color-active: rgba(46, 170, 220, 0.1);

    /* Node-specific colors */
    --node-editor-group-node-background: rgba(235, 236, 237, 0.6);
    --node-editor-group-node-border: rgba(55, 53, 47, 0.09);
    --node-editor-group-node-active-background: rgba(235, 236, 237, 0.8);
    --node-editor-group-node-active-color: #37352f;
    --node-editor-node-port-input-color: #696969;
    --node-editor-node-port-output-color: #696969;

    /* System fills */
    --node-editor-tertiary-system-background: #f7f7f5;
    --node-editor-tertiary-system-fill-color: rgba(55, 53, 47, 0.06);
    --node-editor-quaternary-system-fill-color: rgba(55, 53, 47, 0.09);

    /* Border Radii */
    --node-editor-border-radius-xxs: 2px;
    --node-editor-border-radius-xs: 3px;
    --node-editor-radius-xs: 3px;
    --node-editor-radius-sm: 4px;
    --node-editor-radius-md: 4px;
    --node-editor-control-border-radius: 3px;
    --node-editor-segment-control-border-radius: 3px;

    /* Borders */
    --node-editor-border-width: 1px;
    --node-editor-border-color: rgba(55, 53, 47, 0.09);
    --node-editor-divider-color: rgba(55, 53, 47, 0.09);
    --node-editor-separator-color: rgba(55, 53, 47, 0.09);

    /* Segment controls */
    --node-editor-segment-backdrop-filter: none;
    --node-editor-segment-control-background: rgba(55, 53, 47, 0.06);
    --node-editor-segment-control-background-color: rgba(55, 53, 47, 0.06);
    --node-editor-segment-control-text-color: rgba(55, 53, 47, 0.6);
    --node-editor-segment-control-active-background-color: #ffffff;
    --node-editor-segment-control-active-text-color: #37352f;
    --node-editor-segment-control-segment-padding: 2px 8px;

    /* Tab Navigation - Notion text tab style (clean, minimal) */
    --node-editor-tab-nav-gap: var(--node-editor-space-md);
    --node-editor-tab-nav-padding: 0;
    --node-editor-tab-nav-border-radius: 0;
    --node-editor-tab-nav-background: transparent;
    --node-editor-tab-nav-box-shadow: none;
    --node-editor-tab-button-flex: 0 0 auto;
    --node-editor-tab-button-min-height: 28px;
    --node-editor-tab-button-padding: var(--node-editor-space-xs) 0;
    --node-editor-tab-button-border-radius: 0;
    --node-editor-tab-button-background: transparent;
    --node-editor-tab-button-color: rgba(55, 53, 47, 0.5);
    --node-editor-tab-button-font-size: var(--node-editor-inspector-font-size-meta);
    --node-editor-tab-button-font-weight: 500;
    --node-editor-tab-button-active-background: transparent;
    --node-editor-tab-button-active-color: #37352f;
    --node-editor-tab-button-active-font-weight: 600;
    --node-editor-tab-button-active-box-shadow: none;
    --node-editor-tab-button-hover-background: transparent;
    --node-editor-tab-button-hover-color: rgba(55, 53, 47, 0.8);

    /* Connection styling - Notion theme */
    --node-editor-connection-base-stroke-width: 1.5;
    --node-editor-connection-active-stroke-width: 2.5;
    --node-editor-connection-flow-stripe-stroke-width: 1.5;
    --node-editor-connection-flow-stripe-active-stroke-width: 2.5;
    --node-editor-connection-direction-stroke-width: 1.5;
    --node-editor-connection-hover-shadow: none;
    --node-editor-connection-selected-shadow: none;
    --node-editor-connection-hover-opacity: 0.8;
    --node-editor-connection-dragging-opacity: 0.5;
    --node-editor-connection-stripe-dash-array: 8 8;
    --node-editor-connection-stripe-dash-offset-bg: 0;
    --node-editor-connection-stripe-opacity-accent: 1;
    --node-editor-connection-stripe-opacity-background: 0.4;
    --node-editor-connection-flow-animation-duration: 2s;
    --node-editor-connection-flow-animation-distance: -16;
    --node-editor-connection-base-transition: stroke 0.1s ease-out, stroke-width 0.1s ease-out;
    --node-editor-connection-arrow-transition: fill 0.1s ease-out;

    /* Connection drag styling - Notion theme */
    --node-editor-connection-drag-stroke-width-connecting: 1.5;
    --node-editor-connection-drag-stroke-width-disconnecting: 2;
    --node-editor-connection-drag-dash-array-connecting: 4 4;
    --node-editor-connection-drag-dash-array-disconnecting: 6 3;
    --node-editor-connection-drag-animation-duration: 1s;
    --node-editor-connection-drag-animation-distance: -8;

    /* Inspector icon button - Notion minimal style */
    --node-editor-inspector-icon-button-size: 26px;
    --node-editor-inspector-icon-button-size-sm: 22px;
    --node-editor-inspector-icon-button-icon-size: 16px;
    --node-editor-inspector-icon-button-icon-size-sm: 14px;
    --node-editor-inspector-icon-button-background: transparent;
    --node-editor-inspector-icon-button-background-hover: rgba(55, 53, 47, 0.08);
    --node-editor-inspector-icon-button-background-active: rgba(46, 170, 220, 0.1);
    --node-editor-inspector-icon-button-color: rgba(55, 53, 47, 0.5);
    --node-editor-inspector-icon-button-color-hover: #37352f;
    --node-editor-inspector-icon-button-color-active: #2eaadc;
    --node-editor-inspector-icon-button-color-disabled: rgba(55, 53, 47, 0.25);

    /* Inspector input label - Notion typography */
    --node-editor-inspector-input-label-color: rgba(55, 53, 47, 0.65);
    --node-editor-inspector-input-label-font-size: 0.75rem;
    --node-editor-inspector-input-label-font-weight: 500;
    --node-editor-inspector-input-label-width: auto;
    --node-editor-inspector-input-label-min-width: 48px;

    /* Inspector segment control - Notion pill style */
    --node-editor-inspector-segment-background: rgba(55, 53, 47, 0.06);
    --node-editor-inspector-segment-border-radius: 4px;
    --node-editor-inspector-segment-padding: 2px;
    --node-editor-inspector-segment-gap: 0;
    --node-editor-inspector-segment-button-background: transparent;
    --node-editor-inspector-segment-button-background-hover: rgba(55, 53, 47, 0.04);
    --node-editor-inspector-segment-button-background-active: #ffffff;
    --node-editor-inspector-segment-button-color: rgba(55, 53, 47, 0.6);
    --node-editor-inspector-segment-button-color-hover: #37352f;
    --node-editor-inspector-segment-button-color-active: #37352f;
    --node-editor-inspector-segment-button-shadow-active: rgba(15, 15, 15, 0.1) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 2px 4px;
}