/**
 * AFINARA Shared Web Foundation — Flow Engineering Neutral Tokens (v1.0.0)
 * 
 * Strict Standards:
 * 1. Zero Blue Policy: Pure neutral palette, high-contrast, zero saturation.
 * 2. Header & Control Dimensions: 56px header baseline, 32px/40px controls, 44px min touch.
 * 3. Responsive & Expanded Layout: Safe internal scrolling for wide grids, zero page-wide overflow.
 * 4. Interaction Craft: Apple Design spring curves, accessible 2px solid focus rings.
 */

:root {
  /* =========================================================================
     1. Surfaces & Canvas
     ========================================================================= */
  --af-bg-page: #fafafa;
  --af-bg-surface: #ffffff;
  --af-bg-subtle: #f5f5f5;
  --af-bg-hover: #eeeeee;
  --af-bg-active: #e5e5e5;
  --af-bg-selected: #242824;
  --af-bg-selected-subtle: #ebebeb;
  --af-backdrop: rgba(0, 0, 0, 0.4);

  /* =========================================================================
     2. Typography & Ink
     ========================================================================= */
  --af-ink-primary: #1f231f;
  --af-ink-secondary: #575c57;
  --af-ink-muted: #737873;
  --af-ink-inverse: #ffffff;

  /* =========================================================================
     3. Hairlines & Structural Dividers
     ========================================================================= */
  --af-line: #e2e5de;
  --af-line-subtle: #eeeeee;
  --af-line-strong: #a8ada8;

  /* =========================================================================
     4. Interactive Actions & Accessible Focus
     ========================================================================= */
  --af-action-bg: #242824;
  --af-action-text: #ffffff;
  --af-action-hover: #121412;
  --af-focus-ring: #242824;

  /* =========================================================================
     5. Status Indicators (Muted Enterprise Palette)
     ========================================================================= */
  --af-status-ok-bg: #f0fdf4;
  --af-status-ok-ink: #166534;
  --af-status-ok-line: #bbf7d0;

  --af-status-warn-bg: #fffbeb;
  --af-status-warn-ink: #92400e;
  --af-status-warn-line: #fde68a;

  --af-status-error-bg: #fef2f2;
  --af-status-error-ink: #991b1b;
  --af-status-error-line: #fecaca;

  /* =========================================================================
     6. Typography Families & Relative Sizing Scale (Accessible to 200% Text Zoom)
     ========================================================================= */
  --af-font-brand: 'Optima Nova', Optima, 'Times New Roman', Georgia, serif;
  --af-font-ui: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --af-font-mono: ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;

  /* Relative Typographic Scale in rem to guarantee authentic 200% text enlargement */
  --af-font-size-2xs: 0.625rem;  /* 10px @ 16px base, 20px @ 200% zoom */
  --af-font-size-xs: 0.6875rem;  /* 11px @ 16px base, 22px @ 200% zoom */
  --af-font-size-sm: 0.75rem;    /* 12px @ 16px base, 24px @ 200% zoom */
  --af-font-size-base: 0.8125rem;/* 13px @ 16px base, 26px @ 200% zoom */
  --af-font-size-md: 0.875rem;   /* 14px @ 16px base, 28px @ 200% zoom */
  --af-font-size-lg: 0.9375rem;  /* 15px @ 16px base, 30px @ 200% zoom */
  --af-font-size-xl: 1rem;       /* 16px @ 16px base, 32px @ 200% zoom */
  --af-font-size-2xl: 1.25rem;   /* 20px @ 16px base, 40px @ 200% zoom */

  /* =========================================================================
     7. Standard Dimensions & Layout
     ========================================================================= */
  --af-header-height: 56px;
  --af-control-height-sm: 32px;
  --af-control-height-md: 40px;
  --af-touch-min: 44px;
  --af-radius-sm: 4px;
  --af-radius-md: 8px;
  --af-radius-lg: 12px;
  --af-shell-max-width: 1280px;

  /* =========================================================================
     8. Apple Design Spring Transitions (WWDC 2018 / Emil Kowalski Standard)
     ========================================================================= */
  --af-spring-fast: 120ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --af-spring-default: 280ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --af-spring-smooth: 400ms cubic-bezier(0.2, 0.8, 0.2, 1);

  /* =========================================================================
     9. Legacy Hub Compatibility Layer (28 --hub-* variables mapped to --af-*)
     ========================================================================= */
  /* Surfaces */
  --hub-bg-page: var(--af-bg-page);
  --hub-bg-surface: var(--af-bg-surface);
  --hub-bg-subtle: var(--af-bg-subtle);
  --hub-bg-hover: var(--af-bg-hover);
  --hub-bg-selected: var(--af-bg-selected);
  --hub-bg-selected-subtle: var(--af-bg-selected-subtle);

  /* Borders & Dividers */
  --hub-line: var(--af-line);
  --hub-line-subtle: var(--af-line-subtle);
  --hub-line-strong: var(--af-line-strong);

  /* Typography / Inks */
  --hub-ink-primary: var(--af-ink-primary);
  --hub-ink-secondary: var(--af-ink-secondary);
  --hub-ink-muted: var(--af-ink-muted);
  --hub-ink-inverse: var(--af-ink-inverse);

  /* Action & Focus (Approved Black/Charcoal Treatment) */
  --hub-action-bg: var(--af-action-bg);
  --hub-action-text: var(--af-action-text);
  --hub-action-hover: var(--af-action-hover);
  --hub-focus-ring: var(--af-focus-ring);

  /* Restrained Operational Status Tags */
  --hub-tag-pilot-bg: #f7f5f0;
  --hub-tag-pilot-line: #dfdad0;
  --hub-tag-pilot-text: #5c5244;

  --hub-tag-preview-bg: #f7f5f0;
  --hub-tag-preview-line: #dfdad0;
  --hub-tag-preview-text: #5c5244;

  --hub-tag-maint-bg: #f4f4f4;
  --hub-tag-maint-line: #d8d8d8;
  --hub-tag-maint-text: #555555;

  /* Typography */
  --hub-font-display: var(--af-font-brand);
  --hub-font-ui: var(--af-font-ui);

  /* Geometry & Elevation */
  --hub-radius-sm: var(--af-radius-sm);
  --hub-radius-md: var(--af-radius-md);
  --hub-radius-lg: var(--af-radius-lg);
  --hub-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --hub-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
}

/* =========================================================================
   Dark Appearance Theme Overrides
   ========================================================================= */
[data-af-theme="dark"],
[data-theme="dark"] {
  --af-bg-page: #121412;
  --af-bg-surface: #1a1c1a;
  --af-bg-subtle: #242724;
  --af-bg-hover: #2c302c;
  --af-bg-active: #343834;
  --af-bg-selected: #ffffff;
  --af-bg-selected-subtle: #2a2e2a;
  --af-backdrop: rgba(0, 0, 0, 0.65);

  --af-ink-primary: #ededed;
  --af-ink-secondary: #a3a8a3;
  --af-ink-muted: #737873;
  --af-ink-inverse: #121412;

  --af-line: #2e332e;
  --af-line-subtle: #242824;
  --af-line-strong: #4a504a;

  --af-action-bg: #ededed;
  --af-action-text: #121412;
  --af-action-hover: #ffffff;
  --af-focus-ring: #ededed;

  --af-status-ok-bg: #052e16;
  --af-status-ok-ink: #86efac;
  --af-status-ok-line: #14532d;

  --af-status-warn-bg: #451a03;
  --af-status-warn-ink: #fde047;
  --af-status-warn-line: #78350f;

  --af-status-error-bg: #450a0a;
  --af-status-error-ink: #fca5a5;
  --af-status-error-line: #7f1d1d;

  /* Legacy Hub Status Tags & Elevation in Dark Mode */
  --hub-tag-pilot-bg: #2a2620;
  --hub-tag-pilot-line: #4a4235;
  --hub-tag-pilot-text: #d4c8b6;

  --hub-tag-preview-bg: #2a2620;
  --hub-tag-preview-line: #4a4235;
  --hub-tag-preview-text: #d4c8b6;

  --hub-tag-maint-bg: #282828;
  --hub-tag-maint-line: #424242;
  --hub-tag-maint-text: #b0b0b0;

  --hub-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --hub-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
}

/* Automatic System Preference Fallback */
@media (prefers-color-scheme: dark) {
  :root:not([data-af-theme="light"]):not([data-theme="light"]) {
    --af-bg-page: #121412;
    --af-bg-surface: #1a1c1a;
    --af-bg-subtle: #242724;
    --af-bg-hover: #2c302c;
    --af-bg-active: #343834;
    --af-bg-selected: #ffffff;
    --af-bg-selected-subtle: #2a2e2a;
    --af-backdrop: rgba(0, 0, 0, 0.65);

    --af-ink-primary: #ededed;
    --af-ink-secondary: #a3a8a3;
    --af-ink-muted: #737873;
    --af-ink-inverse: #121412;

    --af-line: #2e332e;
    --af-line-subtle: #242824;
    --af-line-strong: #4a504a;

    --af-action-bg: #ededed;
    --af-action-text: #121412;
    --af-action-hover: #ffffff;
    --af-focus-ring: #ededed;

    --af-status-ok-bg: #052e16;
    --af-status-ok-ink: #86efac;
    --af-status-ok-line: #14532d;

    --af-status-warn-bg: #451a03;
    --af-status-warn-ink: #fde047;
    --af-status-warn-line: #78350f;

    --af-status-error-bg: #450a0a;
    --af-status-error-ink: #fca5a5;
    --af-status-error-line: #7f1d1d;

    /* Legacy Hub Status Tags & Elevation in System Dark Mode */
    --hub-tag-pilot-bg: #2a2620;
    --hub-tag-pilot-line: #4a4235;
    --hub-tag-pilot-text: #d4c8b6;

    --hub-tag-preview-bg: #2a2620;
    --hub-tag-preview-line: #4a4235;
    --hub-tag-preview-text: #d4c8b6;

    --hub-tag-maint-bg: #282828;
    --hub-tag-maint-line: #424242;
    --hub-tag-maint-text: #b0b0b0;

    --hub-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --hub-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  }
}

/* =========================================================================
   Expanded Layout Mode Override
   ========================================================================= */
[data-af-expanded="1"] {
  --af-shell-max-width: 100%;
}

/* Base Canvas & Viewport Resets */
html {
  margin: 0;
  padding: 0;
  min-height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--af-bg-page);
  color-scheme: light dark;
  overflow-x: hidden;
  max-width: 100vw;
  width: 100%;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--af-bg-page);
  color: var(--af-ink-primary);
  font-family: var(--af-font-ui);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip; /* Guarantee zero page-wide horizontal overflow */
  max-width: 100vw;
  width: 100%;
  box-sizing: border-box;
}

#root,
#app-root,
.af-shell-react-host {
  min-height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  flex: 1 0 auto;
  background-color: var(--af-bg-page);
}

.af-auth-gate-react-host {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  background-color: var(--af-bg-page);
}

/* Screen-Reader-Only Accessible Utility */
.af-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;
}

*, *::before, *::after {
  box-sizing: border-box;
}

/* Accessible Focus Outlines */
:focus-visible {
  outline: 2px solid var(--af-focus-ring) !important;
  outline-offset: 2px !important;
}

/* =========================================================================
   Structural Container Elements
   ========================================================================= */
.af-container,
.af-shell-main {
  width: 100%;
  max-width: var(--af-shell-max-width, 1280px);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(16px, 3vw, 40px);
  padding-right: clamp(16px, 3vw, 40px);
  box-sizing: border-box;
  transition: max-width var(--af-spring-default);
}

[data-af-expanded="1"] .af-container,
[data-af-expanded="1"] .af-shell-main,
[data-layout-expanded="true"] .af-container,
[data-layout-expanded="true"] .af-shell-main {
  max-width: 100%;
}

/* Table & Wide Grid Containers: Internal Scrolling Only */
.af-grid-container,
.af-table-scroll {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--af-line);
  border-radius: var(--af-radius-md);
  background-color: var(--af-bg-surface);
  box-sizing: border-box;
  contain: inline-size;
}

/* =========================================================================
   Universal Button Variants
   ========================================================================= */
.af-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--af-font-ui);
  font-size: var(--af-font-size-base, 0.8125rem);
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  border-radius: var(--af-radius-md);
  border: 1px solid transparent;
  transition: background-color var(--af-spring-fast),
              color var(--af-spring-fast),
              border-color var(--af-spring-fast),
              transform var(--af-spring-fast);
  padding: 0 14px;
  min-height: var(--af-control-height-sm);
  height: auto;
}

.af-btn:active {
  transform: scale(0.98);
}

/* Button Sizes */
.af-btn-sm {
  min-height: var(--af-control-height-sm);
  height: auto;
  padding: 4px 10px;
  font-size: var(--af-font-size-sm, 0.75rem);
}

.af-btn-md {
  min-height: var(--af-control-height-md);
  height: auto;
  padding: 6px 16px;
  font-size: var(--af-font-size-base, 0.8125rem);
}

/* Variant: Primary */
.af-btn-primary {
  background-color: var(--af-action-bg);
  color: var(--af-action-text);
  border-color: var(--af-action-bg);
}

.af-btn-primary:hover {
  background-color: var(--af-action-hover);
  border-color: var(--af-action-hover);
}

/* Variant: Secondary */
.af-btn-secondary {
  background-color: var(--af-bg-surface);
  color: var(--af-ink-primary);
  border-color: var(--af-line);
}

.af-btn-secondary:hover {
  background-color: var(--af-bg-subtle);
  border-color: var(--af-line-strong);
}

/* Variant: Subtle / Ghost */
.af-btn-subtle {
  background-color: transparent;
  color: var(--af-ink-secondary);
  border-color: transparent;
}

.af-btn-subtle:hover {
  background-color: var(--af-bg-hover);
  color: var(--af-ink-primary);
}

/* Variant: Destructive */
.af-btn-destructive {
  background-color: transparent;
  color: var(--af-status-error-ink);
  border-color: var(--af-status-error-line);
}

.af-btn-destructive:hover {
  background-color: var(--af-status-error-bg);
  border-color: var(--af-status-error-ink);
}

/* =========================================================================
   Standard Modal Dialog Styles
   ========================================================================= */
.af-dialog-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--af-backdrop);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 1000;
  animation: afFadeIn var(--af-spring-fast);
}

.af-dialog-card {
  background-color: var(--af-bg-surface);
  border: 1px solid var(--af-line);
  border-radius: var(--af-radius-lg);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.16);
  max-width: 480px;
  width: 100%;
  padding: 24px;
  animation: afScaleUp var(--af-spring-default);
}

.af-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.af-dialog-title {
  font-family: var(--af-font-brand);
  font-size: 20px;
  font-weight: 500;
  margin: 0;
  color: var(--af-ink-primary);
}

.af-dialog-body {
  font-size: 14px;
  line-height: 1.5;
  color: var(--af-ink-secondary);
  margin-bottom: 24px;
}

.af-dialog-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

@keyframes afFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes afScaleUp {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

/* =========================================================================
   Universal Auth Gate & Identity Common States
   ========================================================================= */
.af-auth-gate-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 48px 20px 80px;
  width: 100%;
  min-height: 480px;
}

.af-auth-card {
  max-width: 480px;
  width: 100%;
  background: var(--af-bg-surface);
  border: 1px solid var(--af-line);
  border-radius: var(--af-radius-lg, 12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  text-align: left;
}

.af-auth-card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--af-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--af-bg-surface);
}

.af-auth-card-wordmark {
  height: 16px;
  display: flex;
  align-items: center;
}

.af-auth-card-badge {
  font-size: var(--af-font-size-xs, 11px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--af-ink-muted);
  text-transform: uppercase;
}

.af-auth-card-body {
  padding: 32px 24px 24px;
}

.af-auth-card-title {
  font-family: var(--af-font-brand, 'Optima', 'Candara', sans-serif);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--af-ink-primary);
  margin: 0 0 10px;
}

.af-auth-card-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--af-ink-secondary);
  margin: 0 0 24px;
}

.af-auth-signin-btn {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 16px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.af-auth-card-caption {
  font-size: var(--af-font-size-xs, 11px);
  color: var(--af-ink-muted);
  margin-top: 16px;
  margin-bottom: 0;
  line-height: 1.4;
}

.af-auth-card-actions {
  display: flex;
  gap: 10px;
}

.af-auth-card-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--af-line);
  background: var(--af-bg-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--af-font-size-2xs, 10px);
  color: var(--af-ink-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Skeleton Loading Shimmers */
.af-skeleton-wordmark {
  height: 20px;
  width: 140px;
  background: linear-gradient(90deg, var(--af-bg-subtle) 25%, var(--af-bg-hover) 50%, var(--af-bg-subtle) 75%);
  background-size: 200% 100%;
  animation: afShimmer 1.8s infinite;
  border-radius: var(--af-radius-sm, 4px);
}

.af-skeleton-line {
  background: linear-gradient(90deg, var(--af-bg-subtle) 25%, var(--af-bg-hover) 50%, var(--af-bg-subtle) 75%);
  background-size: 200% 100%;
  animation: afShimmer 1.8s infinite;
  border-radius: var(--af-radius-sm, 4px);
}

@keyframes afShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Loading Indicator & Secondary Message */
.af-loading-spinner-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 12px 0 16px;
}

.af-loading-spinner {
  animation: afRotate 1s linear infinite;
  color: var(--af-ink-primary, #1f231f);
}

.af-loading-message-wrap {
  text-align: center;
  margin-top: 8px;
}

.af-loading-primary-msg {
  font-size: var(--af-font-size-base, 13px);
  font-weight: 500;
  color: var(--af-ink-primary, #1f231f);
  margin: 0 0 6px 0;
  line-height: 1.4;
}

.af-loading-secondary-msg {
  font-size: var(--af-font-size-xs, 11px);
  color: var(--af-ink-muted, #727771);
  margin: 0;
  line-height: 1.4;
  animation: afFadeIn 240ms ease;
}

.af-loading-error-box {
  background: var(--af-status-crit-bg, #fef2f2);
  border: 1px solid var(--af-status-crit-border, #fecaca);
  border-radius: var(--af-radius-md, 6px);
  padding: 12px 16px;
  margin-top: 12px;
}

.af-loading-error-text {
  font-size: var(--af-font-size-xs, 12px);
  color: var(--af-status-crit-ink, #991b1b);
  margin: 0;
  line-height: 1.4;
}

/* Later-Refresh Indicator & Alert (Non-disruptive) */
.af-refresh-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--af-font-size-xs, 11px);
  color: var(--af-ink-muted, #727771);
  padding: 4px 10px;
  border-radius: var(--af-radius-sm, 4px);
  background: var(--af-bg-subtle, #f5f5f5);
  border: 1px solid var(--af-line, #e2e5de);
  margin-bottom: 12px;
}

.af-refresh-spinner {
  animation: afRotate 1s linear infinite;
  color: var(--af-ink-secondary, #575c57);
}

.af-refresh-alert {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 14px;
  background: var(--af-status-crit-bg, #fef2f2);
  color: var(--af-status-crit-ink, #991b1b);
  border: 1px solid var(--af-status-crit-border, #fecaca);
  border-radius: var(--af-radius-md, 6px);
  font-size: var(--af-font-size-xs, 12px);
  margin-bottom: 16px;
}

.af-refresh-alert-text {
  flex: 1 1 auto;
  line-height: 1.4;
}

/* Screen-Reader Only Standard Utility */
.af-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@keyframes afRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Reduced Motion Safety */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .af-loading-spinner,
  .af-refresh-spinner {
    animation: none !important;
  }
}