/* ==========================================================
   SecretHarbor Accessibility & Usability Enhancements
   WCAG 2.2 Level AA/AAA Compliance
   ========================================================== */

/* Respect root rem sizing */
html {
  font-size: 100%;
}

main:focus {
  outline: none;
}

section[id] {
  scroll-margin-top: 100px;
}

a, button, summary {
  touch-action: manipulation;
}

/* Skip to Content Link */
.skip-link {
  position: fixed;
  z-index: 1000;
  top: 14px;
  left: 16px;
  padding: 12px 18px;
  color: #040810;
  background: var(--signal);
  border: 2px solid #ffffff;
  border-radius: 6px;
  font: 13px var(--mono);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 20px rgba(var(--signal-rgb), 0.4);
  transform: translateY(-180%);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Crisp, Luminous Focus Visible Rings */
:focus-visible {
  outline: 2px solid var(--signal) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 12px rgba(var(--signal-rgb), 0.45) !important;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 2px solid var(--signal) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 12px rgba(var(--signal-rgb), 0.45) !important;
}

[role="tabpanel"] {
  outline: none;
}

[role="tabpanel"]:focus-visible {
  outline: 2px solid var(--signal) !important;
  outline-offset: 3px !important;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

/* Minimum Accessible Touch Targets (44px) */
.desktop-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.header-link {
  min-height: 40px;
}

.button {
  min-height: 46px;
}

.copy-button {
  min-height: 40px;
}

.arrow-link {
  min-height: 44px;
}

.projection-tab,
.policy-tab,
.install-tab {
  min-height: 44px;
  padding-left: 8px;
  padding-right: 8px;
}

.menu-toggle {
  min-width: 44px;
  min-height: 44px;
}

.mobile-menu a {
  min-height: 44px;
}

.faq-list summary {
  min-height: 54px;
}

.faq-list summary .faq-toggle {
  min-width: 36px;
  min-height: 36px;
  display: grid;
  place-items: center;
}

.footer-col a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.footer-icon-link,
.header-icon-link {
  min-width: 38px;
  min-height: 38px;
}

/* 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-width: 0;
}

/* High Contrast Windows / Forced Colors Mode */
@media (forced-colors: active) {
  :focus-visible {
    outline: 2px solid Highlight !important;
    outline-offset: 2px !important;
  }

  .button-primary {
    background: Highlight;
    color: HighlightText;
    border: 2px solid HighlightText;
  }

  .stage-card,
  .projection-demo,
  .architecture-diagram,
  .policy-lab,
  .proof-dashboard,
  .install-console {
    border: 1px solid CanvasText;
  }

  .radar-ring,
  .radar-sweep,
  .core-lock {
    border: 1px solid Highlight;
  }
}

/* Reduced Motion Safety */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}