/* ============================================================================
   Universal Design for Learning (UDL) Accessibility Toolbar
   Adds multiple means of representation, action/expression, and engagement
   ============================================================================ */

/* ============================================================================
   UDL Toolbar Component
   ============================================================================ */

.udl-toolbar {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  background: var(--background);
  border: 2px solid var(--a11y-focus-outline);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.udl-toolbar__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 8px;
  background: var(--a11y-accent);
  border: none;
  border-radius: 8px;
  color: var(--background);
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s linear;
}

.udl-toolbar__toggle:hover {
  background: var(--a11y-accent-hover);
}

.udl-toolbar__toggle:focus-visible {
  outline: 3px solid var(--a11y-focus-color);
  outline-offset: 2px;
}

.udl-toolbar__panel {
  background: var(--background);
  border-top: 2px solid var(--a11y-focus-outline);
  padding: 16px;
  min-width: 220px;
  max-width: 280px;
}

.udl-toolbar__panel[hidden] {
  display: none;
}

.udl-toolbar__heading {
  margin: 0 0 12px 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--foreground);
}

.udl-toolbar__group {
  margin-bottom: 12px;
  padding: 0;
  border: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.udl-toolbar__group legend {
  font-size: 12px;
  font-weight: 600;
  color: var(--a11y-accent);
  margin-bottom: 4px;
  padding: 0;
}

.udl-toolbar__row {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.udl-toolbar button {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 500;
  border: 2px solid var(--a11y-accent);
  border-radius: 4px;
  background: transparent;
  color: var(--a11y-accent);
  cursor: pointer;
  transition: all 0.15s linear;
  white-space: nowrap;
  flex: 1;
  min-height: 32px;
}

.udl-toolbar button:hover {
  background: rgba(88, 166, 255, 0.1);
}

.udl-toolbar button:focus-visible {
  outline: 2px solid var(--a11y-focus-color);
  outline-offset: 1px;
}

.udl-toolbar button[aria-pressed="true"],
.udl-toolbar button[aria-pressed="true"]:hover {
  background: var(--a11y-accent);
  color: var(--background);
}

.udl-toolbar button[aria-disabled="true"],
.udl-toolbar button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.udl-toolbar__hint {
  margin: 8px 0 0 0;
  padding: 8px;
  font-size: 11px;
  color: var(--a11y-accent);
  background: rgba(88, 166, 255, 0.05);
  border-radius: 4px;
  line-height: 1.4;
}

.udl-toolbar__hint kbd {
  background: var(--a11y-accent);
  color: var(--background);
  padding: 2px 4px;
  border-radius: 2px;
  font-size: 10px;
  font-weight: 600;
  margin: 0 2px;
  font-family: monospace;
}

/* Live region for announcements */
#udl-announce {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Hide toolbar if JavaScript is disabled */
noscript ~ .udl-toolbar {
  display: none !important;
}

/* ============================================================================
   Multiple Means of Representation — Font Size
   ============================================================================ */

/* Small */
html.udl-font-sm {
  --font-size: 0.875rem;
}

/* Large */
html.udl-font-lg {
  --font-size: 1.2rem;
}

/* Extra Large */
html.udl-font-xl {
  --font-size: 1.45rem;
}

/* ============================================================================
   Multiple Means of Representation — Line Spacing
   ============================================================================ */

html.udl-line-relaxed {
  --line-height: 2em;
}

/* ============================================================================
   Multiple Means of Representation — Dyslexia-Friendly Font
   ============================================================================ */

@font-face {
  font-family: "OpenDyslexic";
  src: url("https://fonts.cdnfonts.com/css/opendyslexic") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "OpenDyslexic";
  src: url("https://fonts.cdnfonts.com/css/opendyslexic") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

html.udl-dyslexia body {
  font-family: "OpenDyslexic", "OpenDyslexic3", sans-serif !important;
  letter-spacing: 0.05em;
  word-spacing: 0.1em;
}

/* Code blocks stay in monospace font */
html.udl-dyslexia code,
html.udl-dyslexia kbd,
html.udl-dyslexia pre {
  font-family: "Fira Code", Monaco, Consolas, "Ubuntu Mono", monospace !important;
}

/* ============================================================================
   Multiple Means of Representation — Light Mode
   ============================================================================ */

html.udl-light-mode {
  --background: #ffffff;
  --foreground: #1a1a1a;
  --a11y-accent: #0057a8;
  --a11y-accent-hover: #003d7a;
  --a11y-accent-visited: #6f42c1;
  --a11y-success: #1b6121;
  --a11y-error: #d00;
  --a11y-warning: #b87803;
  --a11y-focus-color: #000000;
  --a11y-focus-bg: #ffffff;
  --a11y-focus-outline: #0057a8;
}

html.udl-light-mode body {
  background: var(--background);
  color: var(--foreground);
}

html.udl-light-mode a {
  color: var(--a11y-accent);
}

html.udl-light-mode a:visited {
  color: var(--a11y-accent-visited);
}

/* Toolbar also respects light mode */
html.udl-light-mode .udl-toolbar {
  background: var(--background);
  border-color: var(--a11y-focus-outline);
}

html.udl-light-mode .udl-toolbar__toggle {
  background: var(--a11y-accent);
  color: #ffffff !important;
}

html.udl-light-mode .udl-toolbar button {
  color: var(--a11y-accent);
  border-color: var(--a11y-accent);
}

html.udl-light-mode .udl-toolbar button[aria-pressed="true"] {
  background: var(--a11y-accent);
  color: var(--background);
}

/* Enhanced nav focus in light mode */
html.udl-light-mode .navigation-menu__inner a:focus-visible {
  background-color: rgba(0, 87, 168, 0.15);
}

/* ============================================================================
   Multiple Means of Representation — High Contrast Mode
   ============================================================================ */

html.udl-high-contrast {
  --background: #000000;
  --foreground: #ffffff;
  --a11y-accent: #ffff00;
  --a11y-accent-hover: #ffff00;
  --a11y-accent-visited: #ff88ff;
  --a11y-success: #00ff00;
  --a11y-error: #ff0000;
  --a11y-warning: #ffff00;
  --a11y-focus-color: #ffff00;
  --a11y-focus-outline: #ffff00;
  --a11y-focus-bg: #000000;
}

html.udl-high-contrast body {
  background: var(--background);
  color: var(--foreground);
}

html.udl-high-contrast a {
  color: var(--a11y-accent);
  text-decoration: underline;
  text-decoration-thickness: 3px;
}

html.udl-high-contrast a:visited {
  color: var(--a11y-accent-visited);
}

html.udl-high-contrast *:focus-visible {
  outline: 4px solid var(--a11y-focus-outline) !important;
  outline-offset: 2px;
}

html.udl-high-contrast code,
html.udl-high-contrast pre {
  background-color: rgba(255, 255, 0, 0.2);
  color: var(--foreground);
  border: 1px solid var(--a11y-accent);
}

html.udl-high-contrast blockquote {
  border-left: 4px solid var(--a11y-accent);
}

html.udl-high-contrast button,
html.udl-high-contrast input,
html.udl-high-contrast select,
html.udl-high-contrast textarea {
  border-width: 2px;
}

/* Enhanced nav focus in high contrast */
html.udl-high-contrast .navigation-menu__inner a:focus-visible {
  outline-width: 4px;
  background-color: rgba(255, 255, 0, 0.3);
}

/* ============================================================================
   Multiple Means of Action & Expression — Focus/Reading Mode
   ============================================================================ */

html.udl-focus-mode .header,
html.udl-focus-mode .navigation-menu,
html.udl-focus-mode .footer {
  display: none;
}

html.udl-focus-mode .container {
  max-width: 700px;
  margin: 0 auto;
  padding-top: 2rem;
}

html.udl-focus-mode .content {
  padding: 2rem 1rem;
}

html.udl-focus-mode .posts {
  display: none;
}

/* ============================================================================
   Multiple Means of Engagement — Reading Time
   ============================================================================ */

.post-reading-time {
  display: inline-block;
  font-size: 0.9em;
  color: var(--a11y-accent);
  margin-right: 12px;
}

.post-word-count {
  display: inline-block;
  font-size: 0.9em;
  color: var(--a11y-accent);
}

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
  .udl-toolbar {
    display: none !important;
  }

  .post-reading-time::before {
    content: "Reading time: ";
  }

  .post-word-count::after {
    content: " words";
  }

  abbr[title]::after {
    content: " (" attr(title) ")";
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }
}

/* ============================================================================
   Media Query: Reduced Motion
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  .udl-toolbar button {
    transition: none;
  }
}

/* ============================================================================
   Media Query: Mobile Responsive
   ============================================================================ */

@media (max-width: 640px) {
  .udl-toolbar {
    bottom: 10px;
    right: 10px;
  }

  .udl-toolbar__toggle {
    width: 44px;
    height: 44px;
  }

  .udl-toolbar__panel {
    min-width: 200px;
    max-width: 240px;
  }

  .udl-toolbar button {
    font-size: 11px;
    padding: 6px 10px;
    min-height: 28px;
  }

  .udl-toolbar__hint {
    font-size: 10px;
  }
}