@import url('https://fonts.googleapis.com/css2?family=Archivo+Narrow:wght@400;700&family=Roboto+Mono:wght@400;500&display=swap');

:root {
  /* ========================================
     B L U E P R I N T   T H E M E
     Technical Drawing / Architectural Plans
     ======================================== */

  /* Core spacing scale */
  --node-editor-space-xs: 2px;
  --node-editor-space-sm: 4px;
  --node-editor-space-md: 8px;
  --node-editor-space-lg: 12px;
  --node-editor-space-xl: 16px;
  --node-editor-space-xxl: 24px;

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

  /* 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-sm);
  --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 - technical drawing style */
  --node-editor-inspector-font-size-title: 0.75rem;
  --node-editor-inspector-line-height-title: 1.3;
  --node-editor-inspector-font-size-body: 0.75rem;
  --node-editor-inspector-line-height-body: 1.4;
  --node-editor-inspector-font-size-meta: 0.625rem;
  --node-editor-inspector-line-height-meta: 1.3;
  --node-editor-inspector-font-weight-medium: 500;
  --node-editor-inspector-font-size-heading: 0.8125rem;
  --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 - technical/engineering fonts */
  --node-editor-theme-default-font-family: "Archivo Narrow", "DIN", "Eurostile", Arial Narrow, sans-serif;
  --node-editor-theme-control-font-family: "Roboto Mono", "Consolas", monospace;
  --node-editor-theme-label-font-family: "Archivo Narrow", "DIN", "Eurostile", Arial Narrow, sans-serif;
  --node-editor-system-font: "Archivo Narrow", "DIN", sans-serif;
  --node-editor-font-mono: "Roboto Mono", "Consolas", "Courier New", monospace;
  --node-editor-title-font: 700 0.875rem/1.2 var(--node-editor-theme-label-font-family);
  --node-editor-subtitle-font: 400 0.75rem/1.3 var(--node-editor-theme-label-font-family);
  --node-editor-caption-font: 400 0.625rem/1.3 var(--node-editor-theme-default-font-family);
  --node-editor-control-text-font: 500 0.6875rem/1.2 var(--node-editor-theme-control-font-family);
  --node-editor-input-font: 400 0.75rem/1.3 var(--node-editor-font-mono);
  --node-editor-font-size-lg: 0.875rem;
  --node-editor-font-size-sm: 0.6875rem;
  --node-editor-font-size-xs: 0.5625rem;

  /* Canvas grid */
  --node-editor-grid-color: #7cb9e8;
  --node-editor-grid-opacity: 0.4;

  /* Shadow system - none, flat technical drawing */
  --node-editor-shadow-sm: none;
  --node-editor-shadow-md: none;
  --node-editor-shadow-lg: none;

  /* Transition system - disabled to avoid node connection conflicts */
  --node-editor-transition-duration: 0s;

  /* Inspector shadows */
  --node-editor-inspector-shadow: -1px 0 0 #7cb9e8;
  --node-editor-inspector-header-shadow: 0 1px 0 #7cb9e8;

  /* Tree & List Components */
  --node-editor-tree-item-height: 22px;
  --node-editor-tree-indent: 14px;

  /* Control Buttons */
  --node-editor-control-button-size-sm: 18px;
  --node-editor-control-button-size: 24px;

  /* Icons */
  --node-editor-icon-size-sm: 12px;
  --node-editor-icon-selected-brightness: 1.1;

  /* Text colors - white/light blue on dark blue */
  --node-editor-text-color: #ffffff;
  --node-editor-text-secondary: #c5dff8;
  --node-editor-header-text-color: #ffffff;
  --node-editor-label-color: #ffffff;
  --node-editor-secondary-label-color: #a8d0f0;
  --node-editor-tertiary-label-color: #7cb9e8;
  --node-editor-quaternary-label-color: #5a9bd4;
  --node-editor-control-text-color: #ffffff;
  --node-editor-control-text-color-primary: #003366;
  --node-editor-control-text-color-secondary: #ffffff;
  --node-editor-control-hover-text-color-primary: #003366;
  --node-editor-input-text-color: #ffffff;
  --node-editor-selected-control-text-color: #003366;
  --node-editor-selected-menu-item-text-color: #003366;

  /* Accent colors - blueprint palette */
  --node-editor-accent-color: #ffffff;
  --node-editor-accent-color-hover: #c5dff8;
  --node-editor-color-primary: #ffffff;
  --node-editor-keyboard-focus-indicator-color: #ffcc00;
  --node-editor-success-color: #7cb9e8;
  --node-editor-warning-color: #ffcc00;
  --node-editor-caution-color: #ff6666;
  --node-editor-caution-hover-background: rgba(255, 102, 102, 0.2);
  --node-editor-system-orange-color: #ffcc00;
  --node-editor-system-red-color: #ff6666;
  --node-editor-connection-color: #ffffff;

  /* Surface colors - blueprint blue */
  --node-editor-surface-primary: #003366;
  --node-editor-surface-secondary: #004080;
  --node-editor-surface-tertiary: #004d99;
  --node-editor-selected-content-background-color: rgba(255, 255, 255, 0.15);
  --node-editor-selected-control-color: rgba(255, 255, 255, 0.2);
  --node-editor-under-page-background-color: #002244;
  --node-editor-window-background-color: #003366;
  --node-editor-background-surface: #002244;

  /* Control surfaces */
  --node-editor-control-background: transparent;
  --node-editor-control-background-primary: #ffffff;
  --node-editor-control-background-secondary: rgba(255, 255, 255, 0.1);
  --node-editor-control-hover-background: rgba(255, 255, 255, 0.15);
  --node-editor-control-hover-background-primary: #c5dff8;
  --node-editor-hover-background: rgba(255, 255, 255, 0.1);
  --node-editor-control-box-shadow-primary: none;
  --node-editor-control-box-shadow-secondary: none;
  --node-editor-disabled-control-text-color: #5a7a9a;

  /* Input surfaces */
  --node-editor-input-background: rgba(0, 20, 50, 0.6);
  --node-editor-input-border: 1px solid #7cb9e8;
  --node-editor-input-border-hover: 1px solid #ffffff;
  --node-editor-input-box-shadow: none;
  --node-editor-input-padding: var(--node-editor-space-xs) var(--node-editor-space-sm);

  /* Card & panel styling - technical drawing boxes */
  --node-editor-card-border-color: #7cb9e8;
  --node-editor-card-border: 1px solid #7cb9e8;
  --node-editor-card-border-radius: 0;
  --node-editor-card-box-shadow: none;
  --node-editor-card-hover-box-shadow: 0 0 0 1px #ffffff;
  --node-editor-card-elevated-box-shadow: none;
  --node-editor-card-focus-box-shadow: 0 0 0 2px #ffcc00;
  --node-editor-card-disabled-background: rgba(0, 51, 102, 0.5);
  --node-editor-card-filled-background: rgba(0, 64, 128, 0.8);
  --node-editor-card-filled-hover-background: rgba(0, 77, 153, 0.8);
  --node-editor-card-hover-border-color: #ffffff;

  /* Dialogs & overlays */
  --node-editor-dialog-background: #003366;
  --node-editor-dialog-box-shadow: 0 0 0 2px #7cb9e8;
  --node-editor-dialog-level-elevation: 1000;

  /* Scrollbars */
  --node-editor-scroll-bar-thumb-color: #7cb9e8;
  --node-editor-active-scroll-bar-thumb-color: #ffffff;

  /* Selected State Colors */
  --node-editor-selected-secondary-color: #ffcc00;
  --node-editor-selected-hover-background: rgba(255, 255, 255, 0.15);

  /* Tables & list accents */
  --node-editor-table-header-background-color: rgba(124, 185, 232, 0.3);
  --node-editor-table-header-background-color-hover: rgba(124, 185, 232, 0.5);
  --node-editor-table-header-background-color-active: rgba(255, 255, 255, 0.2);

  /* Node-specific colors */
  --node-editor-group-node-background: rgba(0, 51, 102, 0.6);
  --node-editor-group-node-border: #7cb9e8;
  --node-editor-group-node-active-background: rgba(255, 255, 255, 0.1);
  --node-editor-group-node-active-color: #ffffff;
  --node-editor-node-port-input-color: #7cb9e8;
  --node-editor-node-port-output-color: #ffffff;

  /* System fills */
  --node-editor-tertiary-system-background: rgba(0, 77, 153, 0.6);
  --node-editor-tertiary-system-fill-color: rgba(124, 185, 232, 0.3);
  --node-editor-quaternary-system-fill-color: rgba(124, 185, 232, 0.15);

  /* Border Radii - sharp corners for technical drawings */
  --node-editor-border-radius-xxs: 0;
  --node-editor-border-radius-xs: 0;
  --node-editor-radius-xs: 0;
  --node-editor-radius-sm: 0;
  --node-editor-radius-md: 0;
  --node-editor-control-border-radius: 0;
  --node-editor-segment-control-border-radius: 0;

  /* Borders */
  --node-editor-border-width: 1px;
  --node-editor-border-color: #7cb9e8;
  --node-editor-divider-color: #5a9bd4;
  --node-editor-separator-color: #4080bf;

  /* Segment controls */
  --node-editor-segment-backdrop-filter: none;
  --node-editor-segment-control-background: transparent;
  --node-editor-segment-control-background-color: rgba(255, 255, 255, 0.1);
  --node-editor-segment-control-text-color: #ffffff;
  --node-editor-segment-control-active-background-color: #ffffff;
  --node-editor-segment-control-active-text-color: #003366;
  --node-editor-segment-control-segment-padding: 2px 8px;

  /* Tab Navigation */
  --node-editor-tab-nav-gap: 0;
  --node-editor-tab-nav-padding: 0;
  --node-editor-tab-nav-border-radius: 0;
  --node-editor-tab-nav-background: transparent;
  --node-editor-tab-nav-border: 1px solid #7cb9e8;
  --node-editor-tab-nav-box-shadow: none;
  --node-editor-tab-button-flex: 1;
  --node-editor-tab-button-min-height: 24px;
  --node-editor-tab-button-padding: 4px 12px;
  --node-editor-tab-button-border-radius: 0;
  --node-editor-tab-button-background: transparent;
  --node-editor-tab-button-border: 1px solid #7cb9e8;
  --node-editor-tab-button-color: #7cb9e8;
  --node-editor-tab-button-font-size: var(--node-editor-inspector-font-size-meta);
  --node-editor-tab-button-font-weight: 500;
  --node-editor-tab-button-text-transform: uppercase;
  --node-editor-tab-button-active-background: #ffffff;
  --node-editor-tab-button-active-color: #003366;
  --node-editor-tab-button-active-font-weight: 700;
  --node-editor-tab-button-active-box-shadow: none;
  --node-editor-tab-button-hover-background: rgba(255, 255, 255, 0.1);
  --node-editor-tab-button-hover-color: #ffffff;

  /* Connection styling - technical line drawing, no transitions */
  --node-editor-connection-base-stroke-width: 1;
  --node-editor-connection-active-stroke-width: 2;
  --node-editor-connection-flow-stripe-stroke-width: 1;
  --node-editor-connection-flow-stripe-active-stroke-width: 2;
  --node-editor-connection-direction-stroke-width: 1;
  --node-editor-connection-hover-shadow: none;
  --node-editor-connection-selected-shadow: drop-shadow(0 0 3px #ffcc00);
  --node-editor-connection-hover-opacity: 1;
  --node-editor-connection-dragging-opacity: 0.7;
  --node-editor-connection-stripe-dash-array: 8 4;
  --node-editor-connection-stripe-dash-offset-bg: 0;
  --node-editor-connection-stripe-opacity-accent: 1;
  --node-editor-connection-stripe-opacity-background: 0.5;
  --node-editor-connection-flow-animation-duration: 0s;
  --node-editor-connection-flow-animation-distance: 0;
  --node-editor-connection-base-transition: none;
  --node-editor-connection-arrow-transition: none;

  /* Connection drag styling */
  --node-editor-connection-drag-stroke-width-connecting: 1;
  --node-editor-connection-drag-stroke-width-disconnecting: 1;
  --node-editor-connection-drag-dash-array-connecting: 4 4;
  --node-editor-connection-drag-dash-array-disconnecting: 8 4;
  --node-editor-connection-drag-animation-duration: 0s;
  --node-editor-connection-drag-animation-distance: 0;

  /* Inspector icon button */
  --node-editor-inspector-icon-button-size: 20px;
  --node-editor-inspector-icon-button-size-sm: 16px;
  --node-editor-inspector-icon-button-icon-size: 12px;
  --node-editor-inspector-icon-button-icon-size-sm: 10px;
  --node-editor-inspector-icon-button-background: transparent;
  --node-editor-inspector-icon-button-background-hover: rgba(255, 255, 255, 0.15);
  --node-editor-inspector-icon-button-background-active: rgba(255, 255, 255, 0.2);
  --node-editor-inspector-icon-button-color: #7cb9e8;
  --node-editor-inspector-icon-button-color-hover: #ffffff;
  --node-editor-inspector-icon-button-color-active: #ffffff;
  --node-editor-inspector-icon-button-color-disabled: #4080bf;

  /* Inspector input label */
  --node-editor-inspector-input-label-color: #7cb9e8;
  --node-editor-inspector-input-label-font-size: 0.5625rem;
  --node-editor-inspector-input-label-font-weight: 500;
  --node-editor-inspector-input-label-width: auto;
  --node-editor-inspector-input-label-min-width: 36px;

  /* Inspector segment control */
  --node-editor-inspector-segment-background: transparent;
  --node-editor-inspector-segment-border-radius: 0;
  --node-editor-inspector-segment-padding: 0;
  --node-editor-inspector-segment-gap: 0;
  --node-editor-inspector-segment-button-background: transparent;
  --node-editor-inspector-segment-button-background-hover: rgba(255, 255, 255, 0.1);
  --node-editor-inspector-segment-button-background-active: #ffffff;
  --node-editor-inspector-segment-button-color: #7cb9e8;
  --node-editor-inspector-segment-button-color-hover: #ffffff;
  --node-editor-inspector-segment-button-color-active: #003366;
  --node-editor-inspector-segment-button-shadow-active: none;
}