/**
 * System Architecture Diagram Generator — Scoped Stylesheet
 * Tool #42 — VANTIX Platform Component (100% Parity with Tool #40 & #41)
 * Zero Hardcoded Theme Overrides • Anti-Bleed & Zero-Collision Box Model
 */

.arch-workspace-shell {
  /* Surface Ladder (Dark Mode - Default) */
  --arch-floor:           #08090a;
  --arch-dots:            rgba(255, 255, 255, 0.07);
  --arch-surface-1:       #0f1013;
  --arch-surface-2:       #16181d;
  --arch-surface-3:       #1f2229;
  --arch-border:          rgba(255, 255, 255, 0.09);
  --arch-border-hi:       rgba(255, 255, 255, 0.20);
  --arch-bevel:           inset 0 1px 0 rgba(255, 255, 255, 0.07);

  /* Typography & High-Contrast Colors */
  --arch-text-high:       #f8fafc;
  --arch-text-mid:        #94a3b8;
  --arch-text-muted:      #64748b;

  /* Precision Accent Tokens */
  --arch-gold:            #d4af37;
  --arch-gold-soft:       rgba(212, 175, 55, 0.12);
  --arch-cyan:            #38bdf8;
  --arch-emerald:         #34d399;
  --arch-indigo:          #818cf8;
  --arch-rose:            #fb7185;

  /* Node Dimensions & Radii */
  --arch-radius-sm:       6px;
  --arch-radius-md:       8px;
  --arch-radius-lg:       12px;
  --arch-radius-xl:       16px;

  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: var(--space-4, 1rem) 0 var(--space-12, 3rem);
  box-sizing: border-box;
  font-family: var(--font-sans, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
  color: var(--arch-text-high);
  container-type: inline-size;
  container-name: archApp;
  overflow-x: clip;
}

.arch-workspace-shell[data-theme="light"],
.light .arch-workspace-shell {
  --arch-floor:           #fafafa;
  --arch-dots:            rgba(0, 0, 0, 0.06);
  --arch-surface-1:       #ffffff;
  --arch-surface-2:       #f4f4f5;
  --arch-surface-3:       #e4e4e7;
  --arch-border:          rgba(0, 0, 0, 0.10);
  --arch-border-hi:       rgba(0, 0, 0, 0.22);
  --arch-bevel:           inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --arch-text-high:       #18181b;
  --arch-text-mid:        #52525b;
  --arch-text-muted:      #71717a;
  --arch-gold:            #b8901c;
  --arch-gold-soft:       rgba(184, 144, 28, 0.12);
}

/* Top Sentinel & Multi-Format Export Bar */
.arch-sentinel-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  width: 100%;
  box-sizing: border-box;
}

.arch-sentinel-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.arch-share-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.arch-badge-gold {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--arch-gold-soft);
  color: var(--arch-gold);
  border: 1px solid rgba(212, 175, 55, 0.3);
  white-space: nowrap;
}

.arch-badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--arch-surface-2);
  color: var(--arch-emerald);
  border: 1px solid var(--arch-border);
  max-width: 100%;
}

.arch-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 9999px;
  background: var(--arch-emerald);
  box-shadow: 0 0 6px var(--arch-emerald);
  flex-shrink: 0;
  animation: archPulse 2s infinite;
}

.arch-sync-drawer {
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--arch-radius-lg);
  background: rgba(16, 185, 129, 0.10);
  border: 1px solid rgba(16, 185, 129, 0.30);
  font-size: 0.75rem;
  box-sizing: border-box;
}

.arch-sync-drawer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.arch-sync-drawer-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
  color: var(--arch-emerald);
}

.arch-sync-drawer-meta {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.69rem;
  color: var(--arch-text-mid);
}

.arch-sync-drawer-body {
  margin: 0.35rem 0 0;
  font-size: 0.72rem;
  color: var(--arch-text-mid);
  line-height: 1.5;
}

/* Tool #38/#40/#41 Signature: 5-Metric Horizontal KPI Ribbon Card */
.arch-kpi-ribbon-card {
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-radius: var(--arch-radius-lg);
  padding: 12px 16px;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
  box-shadow: 0 8px 25px -5px rgba(0, 0, 0, 0.16), var(--arch-bevel);
  margin-bottom: 1rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.arch-kpi-ribbon-card:hover {
  border-color: rgba(212, 175, 55, 0.35);
}

.arch-kpi-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 18px;
  width: 100%;
  box-sizing: border-box;
}

.arch-kpi-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  flex: 1 1 auto;
  min-width: 125px;
  max-width: 100%;
}

@media (max-width: 1024px) {
  .arch-kpi-divider {
    display: none;
  }
}

.arch-kpi-label {
  color: var(--arch-text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.72rem;
}

.arch-kpi-val {
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--arch-text-high);
  line-height: 1;
  overflow-wrap: anywhere;
}

.arch-kpi-sub {
  color: var(--arch-text-mid);
  font-size: 0.72rem;
  font-weight: 500;
}

.arch-kpi-divider {
  width: 1px;
  height: 18px;
  background: var(--arch-border);
  flex-shrink: 0;
}

/* Circular Comet Guide Trigger (?) & Mobile-Clamped Hover Popup */
.vantix-guide-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.vantix-guide-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 9999px;
  background: rgba(6, 78, 59, 0.35) !important;
  border: 1.5px solid #F7B733 !important;
  color: #F7B733 !important;
  font-size: 12px;
  font-weight: 800;
  cursor: help;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0;
  line-height: 1;
  flex-shrink: 0;
}

.vantix-guide-trigger:hover,
.vantix-guide-trigger:focus {
  background: #064e3b !important;
  color: #ffffff !important;
  border-color: #FFE066 !important;
  transform: translateY(-1px) scale(1.1);
  outline: none;
}

.vantix-guide-popup {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  width: 260px;
  background: var(--arch-surface-2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--arch-border-hi);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  color: var(--arch-text-high);
  font-size: 12px;
  line-height: 1.45;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 200;
  text-align: left;
}

.vantix-guide-wrap:hover .vantix-guide-popup,
.vantix-guide-wrap:focus-within .vantix-guide-popup {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 640px) {
  .vantix-guide-popup {
    left: auto;
    right: 0;
    transform: translateY(4px);
    max-width: min(260px, calc(100vw - 32px));
  }
  .vantix-guide-wrap:hover .vantix-guide-popup,
  .vantix-guide-wrap:focus-within .vantix-guide-popup {
    transform: translateY(0);
  }
}

.vantix-guide-popup-title {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--arch-gold);
}

.vantix-guide-popup-desc {
  font-size: 11.5px;
  color: var(--arch-text-mid);
}

/* Dynamic pSEO Persona & Regional Calibration Banner */
.arch-pseo-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  border-radius: var(--arch-radius-lg);
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.12) 0%, rgba(255, 255, 255, 0.03) 50%, transparent 100%);
  border: 1px solid rgba(212, 175, 55, 0.28);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-sizing: border-box;
  max-width: 100%;
  word-break: break-word;
  overflow: hidden;
}

/* Header & Top Bar */
.arch-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-lg);
  box-shadow: var(--arch-bevel);
  margin-bottom: 1rem;
  box-sizing: border-box;
}

.arch-header-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  min-width: 0;
}

.arch-title-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--arch-radius-sm);
  background: var(--arch-gold-soft);
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: var(--arch-gold);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.arch-title-badge .arch-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--arch-gold);
  box-shadow: 0 0 6px var(--arch-gold);
  animation: archPulse 2s infinite;
}

@keyframes archPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.arch-main-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--arch-text-high);
  line-height: 1.3;
}

.arch-header-right {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Template Selector Tabs */
.arch-template-strip {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem;
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-md);
  margin-bottom: 1rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  white-space: nowrap;
  scrollbar-width: thin;
  box-sizing: border-box;
}

.arch-template-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--arch-radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--arch-text-mid);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.arch-template-btn:hover {
  background: var(--arch-surface-2);
  color: var(--arch-text-high);
}

.arch-template-btn.active {
  background: var(--arch-surface-3);
  border-color: var(--arch-border-hi);
  color: var(--arch-gold);
  box-shadow: var(--arch-bevel);
}

/* ==========================================================================
   Canvas Workspace Viewport & Grid
   ========================================================================== */
.arch-viewport-container {
  position: relative;
  width: 100%;
  height: 480px;
  min-height: 420px;
  background-color: var(--arch-floor);
  background-image: radial-gradient(var(--arch-dots) 1px, transparent 0);
  background-size: 24px 24px;
  background-position: -12px -12px;
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-xl);
  overflow: hidden;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
  box-sizing: border-box;
  touch-action: none;
}

.arch-viewport-container.grid-clean {
  background-image: none;
}

.arch-viewport-container.grid-lines {
  background-image: 
    linear-gradient(to right, var(--arch-dots) 1px, transparent 1px),
    linear-gradient(to bottom, var(--arch-dots) 1px, transparent 1px);
  background-size: 24px 24px;
}

#arch-svg-canvas {
  width: 100%;
  height: 100%;
  display: block;
  user-select: none;
  cursor: grab;
}

#arch-svg-canvas:active {
  cursor: grabbing;
}

/* ==========================================================================
   SVG Node & Connector Component Styling
   ========================================================================== */
.arch-svg-node {
  cursor: pointer;
  transition: transform 0.15s ease;
}

.arch-svg-node rect.arch-node-box {
  fill: var(--arch-surface-2);
  stroke: var(--arch-border);
  stroke-width: 1.5px;
  rx: 8px;
  ry: 8px;
  transition: all 0.15s ease;
}

.arch-svg-node:hover rect.arch-node-box {
  stroke: var(--arch-border-hi);
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
}

.arch-svg-node.is-selected rect.arch-node-box {
  stroke: var(--arch-gold);
  stroke-width: 2px;
  filter: drop-shadow(0 0 12px rgba(212, 175, 55, 0.35));
}

/* Text Inside Nodes */
.arch-node-badge {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  fill: var(--arch-gold);
}

.arch-node-title {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 13px;
  font-weight: 600;
  fill: var(--arch-text-high);
}

.arch-node-subtitle {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 10.5px;
  font-weight: 400;
  fill: var(--arch-text-mid);
}

/* SVG Connector Paths */
.arch-svg-connector {
  fill: none;
  stroke: rgba(255, 255, 255, 0.28);
  stroke-width: 1.5px;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.15s ease;
}

.arch-workspace-shell[data-theme="light"] .arch-svg-connector,
.light .arch-workspace-shell .arch-svg-connector {
  stroke: rgba(0, 0, 0, 0.28);
}

.arch-svg-connector:hover {
  stroke: var(--arch-gold);
  stroke-width: 2px;
}

.arch-svg-connector.style-dashed {
  stroke-dasharray: 4, 4;
}

.arch-svg-connector.animated {
  animation: archDashFlow 1.2s linear infinite;
}

@keyframes archDashFlow {
  to { stroke-dashoffset: -16; }
}

/* Connector Label Pill */
.arch-connector-pill rect {
  fill: var(--arch-surface-2);
  stroke: var(--arch-border);
  stroke-width: 1px;
  rx: 4px;
}

.arch-connector-pill text {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 9.5px;
  font-weight: 500;
  fill: var(--arch-text-mid);
  text-anchor: middle;
}

/* ==========================================================================
   Floating Canvas HUD Controls
   ========================================================================== */
.arch-canvas-hud {
  position: absolute;
  bottom: 14px;
  left: 14px;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.4rem;
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), var(--arch-bevel);
  z-index: 10;
}

.arch-hud-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--arch-radius-sm);
  background: transparent;
  border: none;
  color: var(--arch-text-mid);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.arch-hud-btn:hover {
  background: var(--arch-surface-3);
  color: var(--arch-text-high);
}

.arch-hud-zoom-label {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0 0.4rem;
  color: var(--arch-text-high);
}

.arch-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-md);
  color: var(--arch-text-high);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18), var(--arch-bevel);
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.arch-action-btn:hover {
  background: var(--arch-surface-3);
  border-color: var(--arch-border-hi);
  color: var(--arch-gold);
  transform: translateY(-1px);
}

.arch-action-btn.btn-primary {
  background: var(--arch-gold);
  border-color: var(--arch-gold);
  color: #08090a !important;
  font-weight: 700;
}

.arch-action-btn.btn-primary:hover {
  background: #e5c04b;
  border-color: #e5c04b;
}

/* ==========================================================================
   Two-Way Mermaid / Text Import Strip & Inspector Drawers
   ========================================================================== */
.arch-quick-bridge-box,
.arch-inspector-drawer {
  margin-top: 1rem;
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-lg);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--arch-bevel);
  box-sizing: border-box;
  min-width: 0;
  max-width: 100%;
}

.arch-bridge-header,
.arch-inspector-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.arch-inspector-header {
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--arch-border);
}

.arch-bridge-title,
.arch-inspector-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--arch-text-high);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.arch-bridge-textarea {
  width: 100%;
  height: 74px;
  background: var(--arch-floor);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-sm);
  color: var(--arch-text-high);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  padding: 0.6rem 0.75rem;
  box-sizing: border-box;
  resize: vertical;
}

.arch-bridge-textarea:focus {
  outline: none;
  border-color: var(--arch-gold);
  box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.15);
}

.arch-inspector-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
  gap: 0.85rem;
  width: 100%;
  box-sizing: border-box;
}

.arch-conn-builder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  align-items: end;
  width: 100%;
  box-sizing: border-box;
  margin-top: 0.75rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--arch-border);
}

.arch-conn-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.arch-conn-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  background: var(--arch-surface-2);
  border: 1px solid var(--arch-border);
  font-size: 0.72rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--arch-text-mid);
  max-width: 100%;
}

.arch-conn-del-btn {
  background: rgba(251, 113, 133, 0.15);
  border: none;
  color: var(--arch-rose);
  border-radius: 50%;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.arch-conn-del-btn:hover {
  background: rgba(251, 113, 133, 0.35);
  color: #ffffff;
}

.arch-field-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  max-width: 100%;
}

.arch-field-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--arch-text-mid);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.arch-field-input,
.arch-field-select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  padding: 0.45rem 0.65rem;
  background: var(--arch-floor);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-sm);
  color: var(--arch-text-high);
  font-size: 0.82rem;
  font-family: inherit;
  box-sizing: border-box;
  text-overflow: ellipsis;
}

.arch-field-input:focus,
.arch-field-select:focus {
  outline: none;
  border-color: var(--arch-gold);
}

/* ==========================================================================
   Export Modal Dialog
   ========================================================================== */
.arch-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.arch-modal-backdrop.is-active {
  opacity: 1;
  pointer-events: auto;
}

.arch-modal-card {
  width: 100%;
  max-width: 680px;
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border-hi);
  border-radius: var(--arch-radius-xl);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.6), var(--arch-bevel);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.arch-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem 1.5rem;
  border-bottom: 1px solid var(--arch-border);
}

.arch-modal-body {
  padding: 1.25rem 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.arch-modal-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--arch-border);
  background: var(--arch-surface-2);
}

.arch-code-preview {
  width: 100%;
  height: 220px;
  background: var(--arch-floor);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-md);
  color: #a5b4fc;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  line-height: 1.45;
  padding: 0.85rem;
  box-sizing: border-box;
  overflow: auto;
  white-space: pre;
}

/* ==========================================================================
   Tables, Accordions & 3,800+ Word SEO/GEO/AEO Guide Article
   ========================================================================== */
.arch-table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
  margin-top: 8px;
  border-radius: var(--arch-radius-md);
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
}

.arch-data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  text-align: left;
}

.arch-data-table th,
.arch-data-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--arch-border);
}

.arch-data-table th {
  color: var(--arch-text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 10.5px;
  letter-spacing: 0.05em;
}

.arch-accordion {
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-lg);
  background: var(--arch-surface-2);
  overflow: hidden;
  margin-top: 0.75rem;
}

.arch-accordion-header {
  width: 100%;
  padding: 13px 16px;
  background: transparent;
  border: none;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--arch-text-high);
  cursor: pointer;
}

.arch-accordion-icon {
  font-size: 10px;
  color: var(--arch-gold);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.arch-accordion-header[aria-expanded="true"] .arch-accordion-icon {
  transform: rotate(180deg);
}

.arch-accordion-content {
  padding: 14px 18px;
  border-top: 1px solid var(--arch-border);
  font-size: 0.84rem;
  color: var(--arch-text-mid);
  line-height: 1.68;
}

.arch-guide-article {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--arch-border);
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.arch-guide-section {
  background: var(--arch-surface-1);
  border: 1px solid var(--arch-border);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--arch-bevel);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-sizing: border-box;
  min-width: 0;
  max-width: 100%;
}

.arch-guide-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--arch-gold);
  background: var(--arch-gold-soft);
  border: 1px solid rgba(212, 175, 55, 0.28);
  padding: 3px 10px;
  border-radius: 9999px;
  width: fit-content;
}

.arch-guide-h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--arch-text-high);
  line-height: 1.3;
  margin: 0;
}

.arch-guide-h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--arch-text-high);
  line-height: 1.4;
  margin-top: 0.5rem;
  margin-bottom: 0;
}

.arch-guide-p {
  font-size: 0.9375rem;
  color: var(--arch-text-mid);
  line-height: 1.72;
  margin: 0;
}

.arch-formula-box {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--arch-border);
  border-radius: var(--arch-radius-md);
  padding: 12px 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8125rem;
  color: var(--arch-gold);
  margin: 6px 0;
  overflow-x: auto;
}

/* Toast Notification */
.arch-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--arch-surface-3);
  border: 1px solid var(--arch-gold);
  color: var(--arch-text-high);
  padding: 0.65rem 1rem;
  border-radius: var(--arch-radius-md);
  font-size: 0.82rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.arch-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Layout Enforcement for VANTIX 2-Panel Product Shell */
.vantix-product-shell {
  padding-top: max(120px, calc(var(--nav-height, 64px) + 56px)) !important;
  overflow-x: clip !important;
  width: 100% !important;
  max-width: 100vw !important;
  box-sizing: border-box !important;
}
.vantix-2panel-grid {
  display: grid !important;
  grid-template-columns: 1fr !important;
  gap: 2rem !important;
  align-items: start !important;
  width: 100% !important;
  max-width: 100% !important;
  min-width: 0 !important;
  box-sizing: border-box !important;
}
.vantix-left-sidebar {
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  min-width: 0 !important;
  box-sizing: border-box !important;
}
@media (min-width: 1024px) {
  .vantix-2panel-grid {
    grid-template-columns: minmax(260px, 300px) minmax(0, 1fr) !important;
    gap: 1.75rem !important;
  }
  .vantix-left-sidebar {
    position: sticky !important;
    top: max(110px, calc(var(--nav-height, 64px) + 40px)) !important;
    z-index: 30 !important;
  }
}
@media (min-width: 1280px) {
  .vantix-2panel-grid {
    grid-template-columns: 320px minmax(0, 1fr) !important;
    gap: 2rem !important;
  }
}
@media (min-width: 1440px) {
  .vantix-2panel-grid {
    grid-template-columns: 340px minmax(0, 1fr) !important;
    gap: 2.5rem !important;
  }
}

/* Responsive Viewport Clamping */
@media (max-width: 768px) {
  .arch-top-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .arch-viewport-container {
    height: 380px;
  }
  .arch-inspector-grid,
  .arch-conn-builder-grid {
    grid-template-columns: 1fr;
  }
  .arch-guide-section {
    padding: 1.25rem;
  }
}

@media (max-width: 420px) {
  .arch-action-btn {
    white-space: normal;
    text-align: center;
  }
}

/* Screen reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}