/**
 * BAC Gate 1 — Global controls, notices and system pages v1.3.0
 * CHAT04-CONTROLS-1.3.0
 */

/* CHAT 03 owns visual tokens. This gate only consumes them. */

/* Links inside editorial content remain recognizable without hover. */
.site-main :where(p, li, dd) > a:not(.bac-action),
.bac-content-link {
  color: var(--bac-color-navy,var(--institutional,#072f49));
  text-decoration-line: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.site-main :where(p, li, dd) > a:not(.bac-action):visited,
.bac-content-link:visited {
  color: var(--bac-color-navy-soft,var(--institutional-2,#164e63));
}

/* Canonical action foundation plus a controlled bridge for inherited .button. */
.bac-action,
.button {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--bac-space-1,.5rem);
  min-block-size: 52px;
  inline-size: auto;
  max-inline-size: 420px;
  padding: var(--bac-space-2,.75rem) var(--bac-space-4,1.5rem);
  border: 2px solid currentColor;
  border-radius: var(--bac-radius-control,4px);
  font-family: var(--bac-font-sans,var(--sans,system-ui,sans-serif));
  font-size: var(--bac-type-body,1rem);
  font-weight: 650;
  line-height: var(--bac-leading-compact,1.4);
  text-align: center;
  text-decoration: none;
  text-transform: none;
  cursor: pointer;
  touch-action: manipulation;
  transform: none;
  transition:
    color 140ms,
    background-color 140ms,
    border-color 140ms;
}

.bac-action--primary,
.button-accent {
  min-block-size: 56px;
  border-color: var(--bac-color-accent,var(--accent,#9b432c));
  background: var(--bac-color-accent,var(--accent,#9b432c));
  color: #fff;
}

.bac-action--secondary,
.button-quiet,
.button-inverse {
  border-color: var(--bac-color-navy,var(--institutional,#072f49));
  background: transparent;
  color: var(--bac-color-navy,var(--institutional,#072f49));
}

.bac-action--text {
  min-block-size: 48px;
  inline-size: fit-content;
  max-inline-size: 100%;
  padding: var(--bac-space-2,.75rem) 0;
  border-color: transparent;
  background: transparent;
  color: var(--bac-color-navy,var(--institutional,#072f49));
  font-size: var(--bac-type-help,.875rem);
  font-weight: 650;
  text-decoration-line: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.bac-action__icon,
.bac-action__external {
  inline-size: 18px;
  block-size: 18px;
}

.bac-action__external {
  inline-size: 16px;
  block-size: 16px;
}

.bac-action:focus-visible,
.button:focus-visible,
.site-main a:focus-visible,
.site-main button:focus-visible,
.site-main input:focus-visible,
.site-main select:focus-visible,
.site-main textarea:focus-visible,
.bac-content-link:focus-visible {
  outline: 3px solid var(--bac-color-focus,var(--bac-focus,#0b6e99));
  outline-offset: 3px;
  box-shadow: none;
}

.page-hero .bac-action:focus-visible,
.page-hero .button:focus-visible,
.cta-panel .bac-action:focus-visible,
.cta-panel .button:focus-visible,
.bac-surface-dark .bac-action:focus-visible,
.bac-surface-dark .button:focus-visible {
  outline-color: var(--bac-color-on-dark,var(--paper,#fffcf6));
}

/* Keyboard and target contract. Inline editorial links remain inline; controls do not. */
:where(button,input:not([type="hidden"]),select,textarea,summary) {
  min-block-size: 44px;
}

:where(.brand,.bac-action,.button,.bac-content-link,.site-header a[href],.site-header button,.site-footer a[href],.site-footer button):focus-visible {
  outline: 3px solid var(--bac-color-focus,var(--bac-focus,#0b6e99));
  outline-offset: 3px;
  box-shadow: none;
}

/* A blocked action is rendered without href or as a native disabled button. */
.bac-action--blocked,
.bac-action[data-bac-state="blocked"],
.button[data-bac-state="blocked"] {
  border-style: dashed;
  border-color: var(--bac-color-panel-line,#bfb7aa);
  background: var(--bac-color-panel,#e6e0d5);
  color: var(--bac-color-muted,var(--muted,#5a6468));
  cursor: not-allowed;
  text-decoration: none;
}

.bac-action--blocked::before,
.bac-action[data-bac-state="blocked"]::before,
.button[data-bac-state="blocked"]::before {
  content: "";
  inline-size: .75rem;
  block-size: .75rem;
  flex: 0 0 .75rem;
  border: 2px solid currentColor;
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px var(--bac-color-panel,#e6e0d5);
}

.bac-action[aria-disabled="true"] {
  pointer-events: none;
}

@media (hover: hover) and (pointer: fine) {
  .bac-action--primary:hover,
  .button-accent:hover {
    border-color: color-mix(in srgb,var(--bac-color-accent,var(--accent,#9b432c)) 86%,#000);
    background: color-mix(in srgb,var(--bac-color-accent,var(--accent,#9b432c)) 86%,#000);
    color: #fff;
    transform: none;
  }

  .bac-action--secondary:hover,
  .button-quiet:hover,
  .button-inverse:hover {
    border-color: var(--bac-color-navy,var(--institutional,#072f49));
    background: color-mix(in srgb,var(--bac-color-navy,var(--institutional,#072f49)) 7%,var(--bac-color-paper,var(--paper,#fffcf6)));
    color: var(--bac-color-navy,var(--institutional,#072f49));
    transform: none;
  }

  .bac-action--text:hover {
    color: var(--bac-color-navy-soft,var(--institutional-2,#164e63));
    transform: none;
  }
}

.bac-action--primary:active,
.button-accent:active {
  border-color: color-mix(in srgb,var(--bac-color-accent,var(--accent,#9b432c)) 72%,#000);
  background: color-mix(in srgb,var(--bac-color-accent,var(--accent,#9b432c)) 72%,#000);
  color: #fff;
  transform: none;
}

.bac-action--secondary:active,
.button-quiet:active,
.button-inverse:active {
  border-color: var(--bac-color-navy,var(--institutional,#072f49));
  background: color-mix(in srgb,var(--bac-color-navy,var(--institutional,#072f49)) 13%,var(--bac-color-paper,var(--paper,#fffcf6)));
  color: var(--bac-color-navy,var(--institutional,#072f49));
  transform: none;
}

.bac-action:disabled,
.button:disabled,
.bac-action[aria-disabled="true"]:not(.bac-action--blocked),
.bac-action[data-bac-state="disabled"],
.button[data-bac-state="disabled"] {
  border-color: var(--bac-color-line,var(--line,#d5cec1));
  background: var(--bac-color-line,var(--line,#d5cec1));
  color: var(--bac-color-muted,var(--muted,#5a6468));
  opacity: 1;
  cursor: not-allowed;
}

.bac-action[data-bac-loading="true"],
.button[data-bac-loading="true"],
.bac-action[data-bac-state="loading"],
.button[data-bac-state="loading"] {
  inline-size: min(100%, var(--bac-loading-width,420px));
  border-color: var(--bac-color-accent,var(--accent,#9b432c));
  background: var(--bac-color-accent,var(--accent,#9b432c));
  color: #fff;
  cursor: progress;
}

.bac-action__spinner {
  inline-size: 18px;
  block-size: 18px;
  flex: 0 0 18px;
  border: 2px solid currentColor;
  border-inline-end-color: transparent;
  border-radius: 50%;
  animation: bac-control-spin 900ms linear infinite;
}

@keyframes bac-control-spin {
  to { transform: rotate(360deg); }
}

.bac-action-group,
.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--bac-space-2,.75rem);
  min-width: 0;
}

.bac-action-group > .bac-action--primary,
.bac-action-group > .bac-action--secondary,
.hero-actions > .button {
  inline-size: min(100%, 420px);
}

/* Persistent state messages. */
.bac-notice {
  --bac-notice-color: var(--bac-color-muted,var(--muted,#5a6468));
  --bac-notice-bg: #f3f1ed;
  box-sizing: border-box;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  align-items: start;
  gap: var(--bac-space-2,.75rem);
  inline-size: min(100%, 880px);
  padding: var(--bac-space-3,1rem);
  border: 1px solid var(--bac-notice-color);
  border-inline-start-width: 4px;
  border-radius: var(--bac-radius-surface,6px);
  background: var(--bac-notice-bg);
  color: var(--bac-color-ink,var(--ink,#17242b));
}

.bac-notice--information {
  --bac-notice-color: var(--bac-color-navy-soft,var(--institutional-2,#164e63));
  --bac-notice-bg: #eaf3f5;
}

.bac-notice--confirmation {
  --bac-notice-color: #2f6b4f;
  --bac-notice-bg: #eaf4ee;
}

.bac-notice--warning {
  --bac-notice-color: #8a5a00;
  --bac-notice-bg: #fff4d6;
}

.bac-notice--error {
  --bac-notice-color: #9e2f2f;
  --bac-notice-bg: #fbecec;
}

.bac-notice--neutral {
  --bac-notice-color: var(--bac-color-muted,var(--muted,#5a6468));
  --bac-notice-bg: #f3f1ed;
}

.bac-notice__icon {
  inline-size: 20px;
  block-size: 20px;
  margin-block-start: 2px;
  color: var(--bac-notice-color);
}

.bac-notice__content {
  min-width: 0;
}

.bac-notice__title {
  margin: 0;
  color: var(--bac-color-ink,var(--ink,#17242b));
  font-family: var(--bac-font-sans,var(--sans,system-ui,sans-serif));
  font-size: var(--bac-type-body,1rem);
  font-weight: 700;
  line-height: var(--bac-leading-compact,1.4);
  letter-spacing: 0;
}

.bac-notice__message {
  margin-block-start: var(--bac-space-1,.5rem);
  color: var(--bac-color-ink,var(--ink,#17242b));
  font-size: var(--bac-type-help,.875rem);
  line-height: var(--bac-leading-body,1.6);
}

.bac-notice__message p {
  max-width: 68ch;
  margin: 0;
}

.bac-notice__message p + p {
  margin-block-start: var(--bac-space-1,.5rem);
}

.bac-notice__action {
  margin-block-start: var(--bac-space-3,1rem);
}

.bac-notice__action .bac-action {
  inline-size: min(100%, 420px);
}

/* System pages remain ordinary, top-aligned pages inside the global shell. */
.bac-system-page {
  padding-block: 32px 56px;
}

.bac-system-page__inner {
  inline-size: min(
    560px,
    calc(100% - var(--bac-safe-left) - var(--bac-safe-right))
  );
  margin-inline: auto;
}

.bac-system-page__label {
  margin: 0 0 12px;
  color: var(--bac-color-navy-soft,var(--institutional-2,#164e63));
  font-family: var(--bac-font-sans,var(--sans,system-ui,sans-serif));
  font-size: var(--bac-type-label,.75rem);
  font-weight: 700;
  line-height: var(--bac-leading-compact,1.4);
  letter-spacing: .09em;
  text-transform: uppercase;
}

.bac-system-page h1 {
  max-width: 18ch;
  margin: 0;
  color: var(--bac-color-navy,var(--institutional,#072f49));
  font-size: var(--bac-type-h1,clamp(2rem,1.3rem + 3.5vw,4.4rem));
  line-height: var(--bac-leading-heading,1.08);
  letter-spacing: -.035em;
}

.bac-system-page__message {
  max-width: 58ch;
  margin: 20px 0 0;
  color: var(--bac-color-muted,var(--muted,#5a6468));
  font-size: var(--bac-type-body,1rem);
  line-height: 1.6;
}

.bac-system-page .bac-action-group {
  margin-block-start: 28px;
}

.bac-system-page--not-found .bac-action-group {
  flex-direction: column;
}

@media (max-width: 349px) {
  .bac-action,
  .button {
    padding-inline: 16px;
  }

  .bac-notice {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
    padding: 14px;
  }

  .bac-notice__icon {
    margin: 0;
  }

  .bac-system-page {
    padding-block-start: 28px;
  }
}

@media (min-width: 768px) {
  .bac-notice {
    padding: 20px;
  }

  .bac-system-page {
    padding-block: 48px 72px;
  }

  .bac-system-page__inner {
    inline-size: min(
      640px,
      calc(100% - var(--bac-safe-left) - var(--bac-safe-right))
    );
  }
}

@media (min-width: 960px) {
  .bac-action-group--adaptive {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }

  .bac-action-group--adaptive > .bac-action--primary,
  .bac-action-group--adaptive > .bac-action--secondary {
    inline-size: auto;
    min-inline-size: 220px;
    max-inline-size: 420px;
  }

  .bac-notice {
    padding: 24px;
  }

  .bac-system-page {
    padding-block: 56px 80px;
  }

  .bac-system-page__inner {
    inline-size: min(
      720px,
      calc(100% - var(--bac-safe-left) - var(--bac-safe-right))
    );
  }

  .bac-system-page--not-found .bac-action-group {
    flex-direction: column;
  }
}

@media (min-width: 1280px) {
  .bac-system-page {
    padding-block: 64px 96px;
  }

  .bac-system-page__inner {
    inline-size: min(
      760px,
      calc(100% - var(--bac-safe-left) - var(--bac-safe-right))
    );
  }

  .bac-system-page h1 {
    font-size: var(--bac-type-h1,4.4rem);
  }
}

/* Secondary actions retain contrast when placed on approved dark surfaces. */
.page-hero .bac-action--secondary,
.page-hero .button-quiet,
.cta-panel .bac-action--secondary,
.cta-panel .button-quiet,
.bac-surface-dark .bac-action--secondary,
.bac-surface-dark .button-quiet {
  border-color: var(--bac-color-paper,var(--paper,#fffcf6));
  background: transparent;
  color: var(--bac-color-paper,var(--paper,#fffcf6));
}

.page-hero .button-inverse,
.cta-panel .button-inverse,
.bac-surface-dark .button-inverse {
  border-color: var(--bac-color-paper,var(--paper,#fffcf6));
  background: var(--bac-color-paper,var(--paper,#fffcf6));
  color: var(--bac-color-navy,var(--institutional,#072f49));
}

@media (hover: hover) and (pointer: fine) {
  .page-hero .bac-action--secondary:hover,
  .page-hero .button-quiet:hover,
  .cta-panel .bac-action--secondary:hover,
  .cta-panel .button-quiet:hover,
  .bac-surface-dark .bac-action--secondary:hover,
  .bac-surface-dark .button-quiet:hover {
    border-color: var(--bac-color-paper,var(--paper,#fffcf6));
    background: var(--bac-color-paper,var(--paper,#fffcf6));
    color: var(--bac-color-navy,var(--institutional,#072f49));
  }

  .page-hero .button-inverse:hover,
  .cta-panel .button-inverse:hover,
  .bac-surface-dark .button-inverse:hover {
    border-color: #f1f3f2;
    background: #f1f3f2;
    color: var(--bac-color-navy,var(--institutional,#072f49));
  }
}

@media (prefers-reduced-motion: reduce) {
  .bac-action,
  .button {
    transition: none;
  }

  .bac-action__spinner {
    animation: none;
    border-inline-end-color: currentColor;
    border-block-start-color: transparent;
  }
}

@media (forced-colors: active) {
  .bac-action,
  .button,
  .bac-notice {
    border: 2px solid CanvasText;
    forced-color-adjust: auto;
  }

  .bac-notice {
    border-inline-start-width: 4px;
  }

  :where(.brand,.bac-action,.button,.site-header a[href],.site-header button,.site-footer a[href],.site-footer button):focus-visible {
    outline: 3px solid Highlight;
    box-shadow: none;
  }

  .bac-action--blocked,
  .bac-action[data-bac-state="blocked"] {
    border-style: dashed;
  }
}

@media print {
  .bac-action,
  .button {
    border: 1px solid currentColor;
    background: transparent !important;
    color: #000 !important;
  }

  .bac-notice {
    break-inside: avoid;
    background: transparent;
  }
}


/* Accessibility closure: later area bundles cannot suppress keyboard focus. */
:root :where(.site-header,.site-main,.site-footer) :where(a[href],button,input,select,textarea,summary):focus-visible {
  outline: 3px solid var(--bac-color-focus,var(--bac-focus,#0b6e99)) !important;
  outline-offset: 3px !important;
  box-shadow: none !important;
}

:root :where(.page-hero,.cta-panel,.bac-surface-dark,.site-footer,.site-nav.is-open) :where(a[href],button,input,select,textarea,summary):focus-visible {
  outline-color: var(--bac-color-on-dark,var(--paper,#fffcf6)) !important;
}

@media (forced-colors: active) {
  :root :where(.site-header,.site-main,.site-footer) :where(a[href],button,input,select,textarea,summary):focus-visible {
    outline-color: Highlight !important;
  }
}

/* State closure after legacy bundles: loading must not be mistaken for disabled. */
:root .bac-action[data-bac-loading="true"],
:root .button[data-bac-loading="true"],
:root .bac-action[data-bac-state="loading"],
:root .button[data-bac-state="loading"] {
  border-color: var(--bac-color-accent,var(--accent,#9b432c)) !important;
  background: var(--bac-color-accent,var(--accent,#9b432c)) !important;
  color: #fff !important;
  cursor: progress;
}