/*
 * Styles for the learner lesson reader.
 *
 * Keep this file scoped under [data-lesson-reader]. The reader has cross-cutting
 * states (reading mode, drawer, generated lesson prose) that are easier to keep
 * correct in CSS than with Tailwind utilities alone.
 */

[data-lesson-reader] [data-reading-mode-only] {
  display: none !important;
}

/* Site chrome is outside [data-lesson-reader], but still participates in reading mode. */
body.lesson-reading-mode [data-reading-mode-hide] {
  display: none !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reading-mode-only="block"] {
  display: block !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reading-mode-only="flex"] {
  display: flex !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reading-mode-only="inline-flex"] {
  display: inline-flex !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reading-mode-shell] {
  max-width: none;
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-main] {
  padding: 0 !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reading-mode-frame] {
  max-width: none;
  margin-inline: 0;
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid color-mix(in srgb, var(--color-on-surface-frame) 16%, transparent);
  background-color: var(--color-surface-frame);
  color: var(--color-on-surface-frame);
  backdrop-filter: none;
  padding: 1rem clamp(1.5rem, 3vw, 2rem);
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] [data-reader-context] {
  color: color-mix(in srgb, var(--color-on-surface-frame) 74%, transparent) !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] h1,
body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] nav {
  color: var(--color-on-surface-frame) !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] .lesson-reader-action:not(.lesson-reader-action-primary) {
  border-color: var(--color-on-surface-frame) !important;
  background-color: transparent !important;
  color: var(--color-on-surface-frame) !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] .lesson-reader-action[aria-pressed="true"]:not(.lesson-reader-action-primary) {
  background-color: color-mix(in srgb, var(--color-on-surface-frame) 14%, transparent) !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] nav .lesson-reader-action {
  border-color: var(--color-on-surface-frame) !important;
  background-color: transparent !important;
  color: var(--color-on-surface-frame) !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-course-plan-panel] [data-action="lesson-reading-mode#closePlan"] {
  border-color: color-mix(in srgb, var(--color-interactive) 72%, var(--academy-border)) !important;
  background-color: color-mix(in srgb, var(--color-interactive) 8%, var(--color-surface-a)) !important;
  color: var(--color-interactive) !important;
}

body.lesson-reading-mode [data-lesson-reader] [data-lesson-canvas] {
  max-width: var(--lesson-reading-frame-max-width, 56rem);
  margin-inline: auto;
  padding: 1rem clamp(1rem, 3vw, 2rem) 0;
}

[data-lesson-reader] [data-reading-mode-backdrop] {
  display: none;
}

[data-lesson-reader] [data-course-plan-panel][aria-hidden="true"] {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 50;
  width: min(24rem, calc(100vw - 2rem));
  max-width: calc(100vw - 2rem);
  overflow-y: auto;
  border-right: 1px solid var(--academy-border);
  border-top: 0 !important;
  transform: translateX(-100%);
}

body.lesson-reading-mode [data-lesson-reader] [data-course-plan-panel] {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 50;
  width: min(24rem, calc(100vw - 2rem));
  max-width: calc(100vw - 2rem);
  overflow-y: auto;
  border-right: 1px solid var(--academy-border);
  border-top: 0 !important;
  transform: translateX(-100%);
  transition: transform 180ms ease;
}

body.lesson-reading-mode.lesson-plan-drawer-open {
  overflow: hidden;
}

body.lesson-reading-mode.lesson-plan-drawer-open [data-lesson-reader] [data-course-plan-panel] {
  box-shadow: 24px 0 64px color-mix(in srgb, var(--color-on-surface-a) 20%, transparent);
  transform: translateX(0);
}

body.lesson-reading-mode.lesson-plan-drawer-open [data-lesson-reader] [data-reading-mode-backdrop] {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 40;
  background-color: color-mix(in srgb, var(--color-on-surface-a) 28%, transparent);
}

[data-lesson-reader] .lesson-reader-action {
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease, border-color 150ms ease, opacity 150ms ease;
}

[data-lesson-reader] .lesson-reader-action:focus-visible {
  outline: 2px solid var(--color-link-a);
  outline-offset: 3px;
}

[data-lesson-reader] .lesson-reader-action:active,
[data-lesson-reader] .lesson-reader-plan-link:active {
  box-shadow: none;
  transform: translate(0, 0);
}

[data-lesson-reader] .lesson-reader-action[aria-pressed="true"]:not(.lesson-reader-action-primary) {
  background-color: color-mix(in srgb, var(--color-on-surface-a) 8%, var(--color-surface-a)) !important;
}

[data-lesson-reader] .lesson-reader-action-primary {
  border-color: var(--color-interactive) !important;
  background-color: var(--color-interactive) !important;
  color: var(--color-on-interactive) !important;
}

[data-lesson-reader] .lesson-reader-action-primary:focus-visible {
  outline-color: var(--color-interactive);
}

@media (hover: hover) and (pointer: fine) {
  [data-lesson-reader] .lesson-reader-action:hover:not(.lesson-reader-action-primary) {
    background-color: color-mix(in srgb, var(--color-on-surface-a) 6%, var(--color-surface-a)) !important;
    box-shadow: 0 10px 24px color-mix(in srgb, var(--color-on-surface-a) 10%, transparent);
    transform: translateY(-1px);
  }

  [data-lesson-reader] .lesson-reader-action-primary:hover {
    background-color: color-mix(in srgb, var(--color-interactive) 92%, var(--color-on-interactive)) !important;
    box-shadow: 0 10px 24px color-mix(in srgb, var(--color-interactive) 28%, transparent);
    transform: translateY(-1px);
  }

  [data-lesson-reader] .lesson-reader-action-subtle:hover,
  [data-lesson-reader] .lesson-reader-plan-link:hover {
    background-color: color-mix(in srgb, var(--color-on-surface-a) 8%, transparent) !important;
    box-shadow: none;
  }

  body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] .lesson-reader-action:hover:not(.lesson-reader-action-primary) {
    background-color: color-mix(in srgb, var(--color-on-surface-frame) 12%, transparent) !important;
    box-shadow: none;
  }

  body.lesson-reading-mode [data-lesson-reader] [data-reader-top-bar] nav .lesson-reader-action:hover {
    background-color: color-mix(in srgb, var(--color-on-surface-frame) 12%, transparent) !important;
  }

  body.lesson-reading-mode [data-lesson-reader] [data-course-plan-panel] [data-action="lesson-reading-mode#closePlan"]:hover {
    border-color: var(--color-interactive) !important;
    background-color: var(--color-interactive) !important;
    color: var(--color-on-interactive) !important;
    box-shadow: none;
  }

  [data-lesson-reader] .lesson-reader-plan-link:hover {
    transform: translateX(2px);
  }
}

[data-lesson-reader] .lesson-prose h1,
[data-lesson-reader] .lesson-prose h2,
[data-lesson-reader] .lesson-prose h3,
[data-lesson-reader] .lesson-prose h4,
[data-lesson-reader] .lesson-prose h5,
[data-lesson-reader] .lesson-prose h6 {
  margin-block: 1.75em 0.75em;
  font-weight: 650;
  line-height: 1.2;
}

[data-lesson-reader] .lesson-prose h1:first-child,
[data-lesson-reader] .lesson-prose h2:first-child,
[data-lesson-reader] .lesson-prose h3:first-child,
[data-lesson-reader] .lesson-prose h4:first-child,
[data-lesson-reader] .lesson-prose h5:first-child,
[data-lesson-reader] .lesson-prose h6:first-child {
  margin-top: 0;
}

[data-lesson-reader] .lesson-prose h2 {
  font-size: 1.5rem;
}

[data-lesson-reader] .lesson-prose h3 {
  font-size: 1.25rem;
}

[data-lesson-reader] .lesson-prose p,
[data-lesson-reader] .lesson-prose ul,
[data-lesson-reader] .lesson-prose ol,
[data-lesson-reader] .lesson-prose blockquote,
[data-lesson-reader] .lesson-prose pre,
[data-lesson-reader] .lesson-prose table {
  margin-block: 1em;
}

[data-lesson-reader] .lesson-prose ul,
[data-lesson-reader] .lesson-prose ol {
  padding-inline-start: 1.5rem;
}

[data-lesson-reader] .lesson-prose ul {
  list-style-type: disc;
}

[data-lesson-reader] .lesson-prose ol {
  list-style-type: decimal;
}

[data-lesson-reader] .lesson-prose li {
  padding-inline-start: 0.25rem;
}

[data-lesson-reader] .lesson-prose li + li {
  margin-top: 0.375rem;
}

[data-lesson-reader] .lesson-prose a {
  color: var(--color-link-a);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

[data-lesson-reader] .lesson-prose blockquote {
  border-inline-start: 3px solid var(--academy-border);
  color: var(--academy-text-muted);
  padding-inline-start: 1rem;
}

/* Stabilo (==mot== dans le markdown, rendu en <mark>) : même geste surligneur
   que le pattern signature du thème, couleur portée par le rôle decorative. */
[data-lesson-reader] .lesson-prose mark {
  background: var(--color-decorative);
  color: var(--color-on-decorative);
  padding: 0.05em 0.2em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  font-weight: 700;
}

[data-lesson-reader] .lesson-prose code {
  font-size: 0.9em;
}

[data-lesson-reader] .lesson-prose pre {
  overflow-x: auto;
  padding: 1rem;
}

[data-lesson-reader] .lesson-prose figure.academy-video {
  margin-block: 1.5em;
}

[data-lesson-reader] .lesson-prose figure.academy-video video {
  aspect-ratio: 16 / 9;
  width: 100%;
  border: 1px solid var(--academy-border);
  background-color: black;
}

[data-lesson-reader] .lesson-prose figure.academy-video figcaption {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--academy-text-muted);
}

/* Encart commun aux médias indisponibles (vidéo, image, fichier ou lien manquant). */
[data-lesson-reader] .lesson-prose aside.academy-video--unavailable,
[data-lesson-reader] .lesson-prose aside.academy-image--unavailable,
[data-lesson-reader] .lesson-prose aside.academy-file--unavailable,
[data-lesson-reader] .lesson-prose aside.academy-link--unavailable {
  margin-block: 1.5em;
  border: 1px solid var(--academy-border);
  background-color: var(--academy-panel);
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  color: var(--academy-text-muted);
}

[data-lesson-reader] .lesson-prose aside.academy-video--unavailable strong,
[data-lesson-reader] .lesson-prose aside.academy-image--unavailable strong,
[data-lesson-reader] .lesson-prose aside.academy-file--unavailable strong,
[data-lesson-reader] .lesson-prose aside.academy-link--unavailable strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--color-on-surface-a);
}

[data-lesson-reader] .lesson-prose aside.academy-video--unavailable p,
[data-lesson-reader] .lesson-prose aside.academy-image--unavailable p,
[data-lesson-reader] .lesson-prose aside.academy-file--unavailable p,
[data-lesson-reader] .lesson-prose aside.academy-link--unavailable p {
  margin-block: 0;
}

/* Images de la médiathèque (balises <academy-image> des leçons texte). */
[data-lesson-reader] .lesson-prose figure.academy-image {
  margin-block: 1.5em;
}

[data-lesson-reader] .lesson-prose figure.academy-image img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--academy-border);
}

[data-lesson-reader] .lesson-prose figure.academy-image figcaption {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--academy-text-muted);
}

/*
 * Snippets copiables (blocs ```prompt, ```cmd… des leçons texte).
 * Chaque type se distingue par son accent : liseré gauche + label colorés.
 */
[data-lesson-reader] .lesson-prose section.academy-snippet {
  --snippet-accent: var(--color-on-surface-frame);
  margin-block: 1.5em;
  border: 1px solid var(--color-surface-frame);
  border-inline-start: 4px solid var(--snippet-accent);
  background-color: var(--color-surface-frame);
  color: var(--color-on-surface-frame);
}

/* Accents dérivés de la palette du thème, éclaircis à la crème pour rester
   lisibles sur le fond encre de la carte. */
[data-lesson-reader] .lesson-prose section.academy-snippet--cmd {
  --snippet-accent: color-mix(in srgb, var(--color-link-a) 55%, var(--color-on-surface-frame));
}

[data-lesson-reader] .lesson-prose section.academy-snippet--skill {
  --snippet-accent: color-mix(in srgb, var(--color-interactive) 45%, var(--color-on-surface-frame));
}

[data-lesson-reader] .lesson-prose .academy-snippet header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--color-on-surface-frame) 18%, transparent);
  padding: 0.5rem 0.625rem 0.5rem 1rem;
}

[data-lesson-reader] .lesson-prose .academy-snippet .academy-snippet-label {
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--snippet-accent) 76%, transparent);
}

/* Ligne d'installation des blocs ```skill : chemin du fichier dans le projet. */
[data-lesson-reader] .lesson-prose .academy-snippet .academy-snippet-hint {
  margin-block: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-on-surface-frame) 18%, transparent);
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  color: color-mix(in srgb, var(--color-on-surface-frame) 72%, transparent);
}

[data-lesson-reader] .lesson-prose .academy-snippet .academy-snippet-status {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-on-surface-frame);
  opacity: 0;
  transition: opacity 150ms ease;
}

[data-lesson-reader] .lesson-prose .academy-snippet .academy-snippet-status.opacity-100 {
  opacity: 1;
}

/* Le lien Télécharger (cartes skill) s'habille comme le bouton Copier. */
[data-lesson-reader] .lesson-prose .academy-snippet button,
[data-lesson-reader] .lesson-prose .academy-snippet header a {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  cursor: pointer;
  border: 1px solid color-mix(in srgb, var(--color-on-surface-frame) 36%, transparent);
  background-color: transparent;
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-on-surface-frame);
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

[data-lesson-reader] .lesson-prose .academy-snippet button:focus-visible,
[data-lesson-reader] .lesson-prose .academy-snippet header a:focus-visible {
  outline: 2px solid var(--color-on-surface-frame);
  outline-offset: 2px;
}

@media (hover: hover) and (pointer: fine) {
  [data-lesson-reader] .lesson-prose .academy-snippet button:hover,
  [data-lesson-reader] .lesson-prose .academy-snippet header a:hover {
    border-color: var(--color-on-surface-frame);
    background-color: color-mix(in srgb, var(--color-on-surface-frame) 12%, transparent);
  }
}

/* Les lignes longues se replient au lieu d'ouvrir un scroll horizontal : la
   copie reste verbatim (portée par data-clipboard-text-value), seul
   l'affichage est replié. */
[data-lesson-reader] .lesson-prose .academy-snippet pre {
  margin-block: 0;
  border-radius: 0;
  background-color: transparent;
  color: var(--color-on-surface-frame);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* Frontmatter d'un bloc ```skill : zone teintée et étiquetée, distincte des
   instructions, pour donner à voir la structure d'un SKILL.md. */
[data-lesson-reader] .lesson-prose .academy-snippet pre.academy-snippet-frontmatter {
  position: relative;
  border-bottom: 1px solid color-mix(in srgb, var(--color-on-surface-frame) 18%, transparent);
  background-color: color-mix(in srgb, var(--snippet-accent) 8%, transparent);
  color: color-mix(in srgb, var(--color-on-surface-frame) 76%, transparent);
}

[data-lesson-reader] .lesson-prose .academy-snippet pre.academy-snippet-frontmatter::after {
  content: "frontmatter";
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  font-size: 0.6875rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--snippet-accent) 76%, transparent);
}

/*
 * Carte de téléchargement (balises <academy-file> des leçons texte) : fichier
 * public de la médiathèque (PDF/ZIP) présenté avec titre, type, poids et une
 * action de téléchargement. Toute la carte est cliquable.
 *
 * Chaque extension porte un modificateur (academy-file--zip, academy-file--pdf…).
 * Pour différencier un type : a.academy-file--<ext> { --file-accent: …; }
 * (garder le `a` dans le sélecteur, sinon la règle de base l'emporte).
 */
[data-lesson-reader] .lesson-prose a.academy-file {
  --file-accent: var(--color-interactive);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-block: 1.5em;
  border: 1px solid var(--academy-border);
  border-inline-start: 4px solid var(--file-accent);
  background-color: var(--academy-panel);
  padding: 1rem 1.25rem;
  color: inherit;
  text-decoration: none;
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

[data-lesson-reader] .lesson-prose a.academy-file:focus-visible {
  outline: 2px solid var(--color-link-a);
  outline-offset: 3px;
}

[data-lesson-reader] .lesson-prose .academy-file .academy-file-icon {
  display: inline-flex;
  flex: none;
  color: var(--file-accent);
}

[data-lesson-reader] .lesson-prose .academy-file .academy-file-body {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.125rem;
}

[data-lesson-reader] .lesson-prose .academy-file .academy-file-body strong {
  font-weight: 650;
  overflow-wrap: anywhere;
}

/* Pas de text-transform : "Mo" doit rester "Mo" (l'extension est déjà en
   majuscules côté Ruby). */
[data-lesson-reader] .lesson-prose .academy-file .academy-file-meta {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--academy-text-muted);
}

[data-lesson-reader] .lesson-prose .academy-file .academy-file-action {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 0.375rem;
  margin-left: auto;
  border: 1px solid color-mix(in srgb, var(--color-on-surface-a) 36%, transparent);
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

@media (hover: hover) and (pointer: fine) {
  [data-lesson-reader] .lesson-prose a.academy-file:hover {
    border-color: var(--file-accent);
    box-shadow: 0 10px 24px color-mix(in srgb, var(--color-on-surface-a) 10%, transparent);
    transform: translateY(-1px);
  }

  [data-lesson-reader] .lesson-prose a.academy-file:hover .academy-file-action {
    border-color: var(--file-accent);
    background-color: var(--file-accent);
    color: var(--color-on-interactive);
  }
}

/*
 * Carte de lien (balises <academy-link> des leçons texte) : URL externe mise
 * en avant avec badge, titre et URL affichée en clair — le geste pédagogique
 * est de montrer le domaine à vérifier. Toute la carte est cliquable et
 * ouvre un nouvel onglet.
 */
[data-lesson-reader] .lesson-prose a.academy-link {
  --link-accent: var(--color-link-a);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-block: 1.5em;
  border: 1px solid var(--academy-border);
  border-inline-start: 4px solid var(--link-accent);
  background-color: var(--academy-panel);
  padding: 1rem 1.25rem;
  color: inherit;
  text-decoration: none;
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

[data-lesson-reader] .lesson-prose a.academy-link:focus-visible {
  outline: 2px solid var(--color-link-a);
  outline-offset: 3px;
}

[data-lesson-reader] .lesson-prose .academy-link .academy-link-icon {
  display: inline-flex;
  flex: none;
  color: var(--link-accent);
}

[data-lesson-reader] .lesson-prose .academy-link .academy-link-body {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.125rem;
}

[data-lesson-reader] .lesson-prose .academy-link .academy-link-label {
  font-size: 0.6875rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--link-accent);
}

[data-lesson-reader] .lesson-prose .academy-link .academy-link-body strong {
  font-weight: 650;
  overflow-wrap: anywhere;
}

[data-lesson-reader] .lesson-prose .academy-link .academy-link-url {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  color: var(--academy-text-muted);
  overflow-wrap: anywhere;
}

[data-lesson-reader] .lesson-prose .academy-link .academy-link-action {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 0.375rem;
  margin-left: auto;
  border: 1px solid color-mix(in srgb, var(--color-on-surface-a) 36%, transparent);
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

@media (hover: hover) and (pointer: fine) {
  [data-lesson-reader] .lesson-prose a.academy-link:hover {
    border-color: var(--link-accent);
    box-shadow: 0 10px 24px color-mix(in srgb, var(--color-on-surface-a) 10%, transparent);
    transform: translateY(-1px);
  }

  [data-lesson-reader] .lesson-prose a.academy-link:hover .academy-link-action {
    border-color: var(--link-accent);
    background-color: var(--link-accent);
    color: var(--color-on-interactive);
  }
}