/* ============================================================
   learn.css — Shared CSS for all lesson / course pages
   "Apprendre a coder avec l'IA" section
   Odilon Hugonnot — web-developpeur.com
   Mobile-first, zero dependencies
   ============================================================ */

/* Google Fonts — Inter for body text */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ---- Design tokens (extend auto.css / landings-shared.css) ---- */
:root {
  --color-accent: #3aaa64;
  --color-accent-hover: #2d844e;
  --color-accent-dark: #267d42;
  --color-accent-light: rgba(58, 170, 100, 0.08);
  --color-hero-bg: #0f1923;
  --color-ink: #2a2a2e;
  --color-text-muted: #5a6270;
  --color-card-border: #e8ecf0;
  --color-ivory-soft: #faf6ee;
  --color-warm: #c9663e;
  --color-rule: rgba(15, 25, 35, 0.12);
  --font-heading: 'Montserrat', sans-serif;
  --font-edito: 'Fraunces', 'Georgia', serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  --font-body: 'Inter', 'Lato', sans-serif;

  --editor-bg: #1a1a2e;
  --editor-text: #e4e4ef;
  --editor-line: rgba(255, 255, 255, 0.06);
  --editor-gutter: rgba(255, 255, 255, 0.25);
}

/* ============================================================
   Lesson hero — compact header
   ============================================================ */
.lesson-hero {
  background:
    radial-gradient(ellipse at 60% 40%, rgba(58, 170, 100, 0.08) 0%, transparent 55%),
    var(--color-hero-bg);
  padding: 80px 24px 36px;
  color: #fff;
}
.lesson-hero-inner {
  max-width: 820px;
  margin: 0 auto;
}

/* Breadcrumb */
.lesson-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 20px;
}
.lesson-breadcrumb a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s;
}
.lesson-breadcrumb a:hover { color: var(--color-accent); }
.lesson-breadcrumb span { color: rgba(255, 255, 255, 0.8); }

/* Hero meta: lesson number + duration */
.lesson-hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}
.lesson-number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(58, 170, 100, 0.12);
  padding: 4px 12px;
  border-radius: 999px;
}
.lesson-duration {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
}

/* Hero title */
.lesson-hero-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0 0 10px;
  text-wrap: balance;
}
.lesson-hero-title em {
  font-family: var(--font-edito);
  font-style: italic;
  font-weight: 600;
  color: var(--color-accent);
  font-variation-settings: "SOFT" 100;
}

.lesson-hero-sub {
  font-size: clamp(0.92rem, 1.4vw, 1.05rem);
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
  margin: 0;
  max-width: 600px;
}

/* ============================================================
   Lesson container — main content area
   ============================================================ */
.lesson-container {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

/* ============================================================
   Lesson sections
   ============================================================ */
.lesson-section {
  margin-bottom: 48px;
}
.lesson-section:last-child { margin-bottom: 0; }

/* Typography within lesson sections — style bare elements */
.lesson-section h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(58, 170, 100, 0.15);
}
.lesson-section p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: #3a3a40;
  margin-bottom: 16px;
  text-align: left;
}
.lesson-section p:last-child { margin-bottom: 0; }
.lesson-section strong {
  font-weight: 700;
  color: var(--color-ink);
}
.lesson-section code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: rgba(58, 170, 100, 0.1);
  color: #1a6b3a;
  padding: 3px 8px;
  border-radius: 5px;
  white-space: normal;
  word-break: break-word;
  font-weight: 500;
}
.lesson-section ul, .lesson-section ol {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: #3a3a40;
  margin: 0 0 20px;
  padding-left: 0;
  list-style: none;
}
.lesson-section li {
  position: relative;
  padding: 10px 16px 10px 20px;
  margin-bottom: 8px;
  background: var(--color-accent-light, rgba(58, 170, 100, 0.05));
  border-radius: 8px;
  border-left: 3px solid var(--color-accent);
}
.lesson-section li strong {
  color: var(--color-accent-dark, #267d42);
}
.lesson-section li code {
  background: rgba(58, 170, 100, 0.15);
}

/* ============================================================
   Lesson headings
   ============================================================ */
.lesson-h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0 0 16px;
  padding-top: 8px;
}
.lesson-h2 em {
  font-family: var(--font-edito);
  font-style: italic;
  font-weight: 600;
  color: var(--color-accent);
}

.lesson-h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.3;
  color: var(--color-ink);
  margin: 0 0 12px;
}

/* ============================================================
   Lesson text
   ============================================================ */
.lesson-text {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: #3a3a40;
  margin-bottom: 20px;
}
.lesson-text:last-child { margin-bottom: 0; }

.lesson-text strong {
  font-weight: 600;
  color: var(--color-ink);
}

.lesson-text a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: rgba(58, 170, 100, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s;
}
.lesson-text a:hover {
  text-decoration-color: var(--color-accent);
}

/* ============================================================
   Inline code
   ============================================================ */
.lesson-code-inline,
.lesson-text code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: rgba(58, 170, 100, 0.08);
  color: #1e6b3a;
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
}

/* ============================================================
   Note box (info)
   ============================================================ */
.lesson-note {
  background: rgba(58, 170, 100, 0.06);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  padding: 18px 22px;
  margin: 24px 0;
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.65;
  color: #3a3a40;
}
.lesson-note::before {
  content: "Note";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #267d42;
  margin-bottom: 8px;
}
.lesson-note p { margin: 0 0 8px; }
.lesson-note p:last-child { margin: 0; }

/* ============================================================
   Warning box
   ============================================================ */
.lesson-warning {
  background: var(--color-ivory-soft);
  border-left: 3px solid var(--color-warm);
  border-radius: 0 6px 6px 0;
  padding: 18px 22px;
  margin: 24px 0;
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.65;
  color: #3a3a40;
}
.lesson-warning::before {
  content: "Attention";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a84f2d;
  margin-bottom: 8px;
}
.lesson-warning p { margin: 0 0 8px; }
.lesson-warning p:last-child { margin: 0; }

/* Best practice box */
.lesson-best-practice {
  background: rgba(43, 108, 176, 0.06);
  border-left: 3px solid #2b6cb0;
  border-radius: 0 6px 6px 0;
  padding: 18px 22px;
  margin: 24px 0;
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.65;
  color: #3a3a40;
}
.lesson-best-practice::before {
  content: "✦ Bonne pratique";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #2b6cb0;
  margin-bottom: 8px;
}
html[lang="en"] .lesson-best-practice::before { content: "✦ Best practice"; }
.lesson-best-practice p { margin: 0 0 8px; }
.lesson-best-practice p:last-child { margin: 0; }

/* Tip box */
.lesson-tip {
  background: rgba(109, 63, 192, 0.06);
  border-left: 3px solid #6d3fc0;
  border-radius: 0 6px 6px 0;
  padding: 18px 22px;
  margin: 24px 0;
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.65;
  color: #3a3a40;
}
.lesson-tip::before {
  content: "💡 Conseil";
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6d3fc0;
  margin-bottom: 8px;
}
html[lang="en"] .lesson-tip::before { content: "💡 Tip"; }
.lesson-tip p { margin: 0 0 8px; }
.lesson-tip p:last-child { margin: 0; }

/* CSS pattern highlight box */
.css-pattern {
  background: var(--editor-bg);
  border-radius: 12px;
  padding: 32px;
  margin: 28px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.css-pattern::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #e44d26, #264de4, #f7df1e);
}
.css-pattern code {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 2;
  color: var(--editor-text);
  background: none;
  white-space: pre;
  text-align: left;
  display: block;
}
.css-pattern .hl-selector { color: #7ee787; font-weight: 700; }
.css-pattern .hl-prop { color: #79c0ff; }
.css-pattern .hl-value { color: #ffa657; font-weight: 600; }
.css-pattern .hl-punct { color: rgba(255,255,255,0.4); }
.css-pattern-labels {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.css-pattern-labels span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.5);
}
.css-pattern-labels .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.css-pattern-labels .dot-sel { background: #7ee787; }
.css-pattern-labels .dot-prop { background: #79c0ff; }
.css-pattern-labels .dot-val { background: #ffa657; }

/* Learning goal (used on course index pages) */
.learning-goal {
  background: rgba(58, 170, 100, 0.05);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  padding: 16px 18px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.55;
  color: #3a3a40;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.learning-goal::before {
  content: "✓";
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 700;
}

/* Note icon */
.lesson-note::before { content: "📝 Note"; }
/* Warning icon */
.lesson-warning::before { content: "⚠️ Attention"; }
html[lang="en"] .lesson-warning::before { content: "⚠️ Warning"; }
html[lang="en"] .lesson-note::before { content: "📝 Note"; }

/* ============================================================
   Code editor — "Essayez vous-meme"
   ============================================================ */
.editor-container {
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  overflow: hidden;
  margin: 28px 0;
  background: #fff;
  box-shadow: 0 2px 12px rgba(15, 25, 35, 0.04);
}

.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--editor-bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.editor-header-title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
}
.editor-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.editor-btn-run {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 16px;
  height: 32px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  letter-spacing: 0.02em;
}
.editor-btn-run:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 2px 8px rgba(58, 170, 100, 0.3);
}
.editor-btn-run:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.editor-btn-reset {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  padding: 6px 12px;
  height: 32px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.editor-btn-reset:hover {
  background: rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.8);
}
.editor-btn-reset:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.editor-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 280px;
}
.editor-split.preview-hidden {
  grid-template-columns: 1fr;
}
.editor-split.preview-hidden .editor-preview-wrapper,
.editor-split.preview-hidden .editor-preview-wrap,
.editor-split.preview-hidden .editor-pane-label--preview {
  display: none;
}
.editor-btn-toggle {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  padding: 6px 12px;
  height: 32px;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.editor-btn-toggle:hover { background: rgba(255, 255, 255, 0.14); color: rgba(255, 255, 255, 0.8); }
.editor-btn-toggle:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.editor-btn-toggle svg { width: 15px; height: 15px; flex-shrink: 0; }
.editor-btn-run, .editor-btn-reset, .editor-btn-toggle { box-sizing: border-box; vertical-align: middle; }

.editor-pane-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--editor-line);
}
.editor-pane-label--preview {
  color: var(--color-text-muted);
  background: rgba(0, 0, 0, 0.02);
  border-bottom: 1px solid var(--color-card-border);
}

.editor-textarea {
  width: 100%;
  height: 100%;
  min-height: 260px;
  padding: 16px;
  background: var(--editor-bg);
  color: var(--editor-text);
  border: none;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.65;
  tab-size: 2;
  outline: none;
  display: block;
}
.editor-textarea::placeholder {
  color: rgba(255, 255, 255, 0.2);
}
.editor-textarea:focus {
  box-shadow: inset 0 0 0 2px rgba(58, 170, 100, 0.3);
}
.editor-textarea:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.editor-preview-wrap {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--color-card-border);
  background: #fff;
}

.editor-preview {
  flex: 1;
  width: 100%;
  border: none;
  background: #fff;
  min-height: 200px;
}

/* ============================================================
   AI box — "Avec l'IA"
   ============================================================ */
.ai-box {
  background: linear-gradient(135deg, rgba(58, 170, 100, 0.04) 0%, rgba(58, 170, 100, 0.08) 100%);
  border: 1px solid rgba(58, 170, 100, 0.18);
  border-radius: 8px;
  padding: 24px;
  margin: 32px 0;
  position: relative;
}
.ai-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), rgba(58, 170, 100, 0.3));
  border-radius: 8px 8px 0 0;
}

.ai-box-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
  margin-bottom: 12px;
}
.ai-box-icon {
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ai-box-icon svg {
  width: 16px;
  height: 16px;
  color: #fff;
}

.ai-box-text {
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.65;
  color: #3a3a40;
  margin-bottom: 14px;
}

.ai-prompt {
  position: relative;
  background: var(--editor-bg);
  color: var(--editor-text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.65;
  padding: 16px 16px 52px;
  border-radius: 8px;
  white-space: normal;
  word-break: break-word;
}
.ai-prompt code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
  white-space: normal;
}
.ai-prompt-copy {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.ai-prompt-copy:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}
.ai-prompt-copy:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.ai-prompt-copy.copied {
  background: var(--color-accent);
  color: #fff;
}

/* ============================================================
   Exercise box
   ============================================================ */
.exercise-box {
  border: 1px solid var(--color-card-border);
  border-top: 3px solid var(--color-accent);
  border-radius: 0 0 8px 8px;
  padding: 28px 24px;
  margin: 32px 0;
  background: #fff;
}

.exercise-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-ink);
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.exercise-title::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  flex-shrink: 0;
}

.exercise-desc {
  font-family: var(--font-body);
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.exercise-code {
  width: 100%;
  min-height: 120px;
  padding: 14px;
  background: var(--editor-bg);
  color: var(--editor-text);
  border: none;
  border-radius: 6px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  tab-size: 2;
  outline: none;
  margin-bottom: 14px;
  display: block;
}
.exercise-code:focus {
  box-shadow: 0 0 0 2px rgba(58, 170, 100, 0.3);
}
.exercise-code:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.exercise-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.exercise-check {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 10px 24px;
  background: var(--color-accent-dark);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
}
.exercise-check:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 12px rgba(58, 170, 100, 0.25);
}
.exercise-check:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.exercise-result {
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 8px;
  display: none;
  margin-top: 16px;
  animation: result-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.exercise-result.show { display: flex; align-items: center; gap: 8px; }
.exercise-result.success {
  background: linear-gradient(135deg, rgba(58, 170, 100, 0.12), rgba(58, 170, 100, 0.06));
  color: #1a6b3a;
  border: 1.5px solid rgba(58, 170, 100, 0.3);
}
.exercise-result.fail {
  background: rgba(201, 102, 62, 0.08);
  color: #8a3a1a;
  border: 1.5px solid rgba(201, 102, 62, 0.2);
}
.exercise-check-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--color-accent); color: #fff;
  font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
}
.exercise-completed .exercise-box,
.exercise-completed {
  border-color: var(--color-accent);
}
.exercise-completed .exercise-title::after {
  content: ' ✓'; color: var(--color-accent); font-weight: 700;
}
.quiz-completed {
  border-color: var(--color-accent);
}
.quiz-completed .quiz-submit { display: none; }

@keyframes result-pop {
  0% { transform: scale(0.8); opacity: 0; }
  60% { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-4px); }
  40%, 80% { transform: translateX(4px); }
}
.shake { animation: shake 0.4s ease; }

/* ============================================================
   Quiz box
   ============================================================ */
.quiz-box {
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  padding: 24px;
  margin: 28px 0;
  background: #fff;
}

.quiz-question {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-ink);
  margin: 0 0 16px;
  line-height: 1.5;
}

.quiz-options {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--color-card-border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  font-family: var(--font-body);
  font-size: 0.94rem;
  color: var(--color-ink);
}
.quiz-option:hover {
  border-color: var(--color-accent);
  background: rgba(58, 170, 100, 0.03);
}
.quiz-option:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(58, 170, 100, 0.2);
}
.quiz-option input[type="radio"] {
  accent-color: var(--color-accent);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.quiz-option.correct {
  border-color: var(--color-accent);
  background: rgba(58, 170, 100, 0.06);
}
.quiz-option.incorrect {
  border-color: var(--color-warm);
  background: rgba(201, 102, 62, 0.05);
}

.quiz-submit {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 9px 20px;
  background: var(--color-accent-dark);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}
.quiz-submit:hover { background: var(--color-accent-hover); }
.quiz-submit:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.quiz-feedback {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.55;
  padding: 12px 16px;
  border-radius: 6px;
  margin-top: 14px;
  display: none;
}
.quiz-feedback.show { display: block; }
.quiz-feedback.correct {
  background: rgba(58, 170, 100, 0.08);
  color: #1e6b3a;
  border-left: 3px solid var(--color-accent);
}
.quiz-feedback.incorrect {
  background: rgba(201, 102, 62, 0.08);
  color: #8a3a1a;
  border-left: 3px solid var(--color-warm);
}

/* ============================================================
   Lesson navigation (prev / next)
   ============================================================ */
.lesson-nav {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.lesson-nav--top {
  padding: 16px 24px;
  margin-bottom: 0;
  border-bottom: 1px solid var(--color-rule);
}
.quiz-completed .quiz-options { pointer-events: none; opacity: 0.7; }

/* Single submit button at bottom */
.quiz-submit-all {
  text-align: center;
  margin: 32px 0 16px;
}
.quiz-submit-all .quiz-submit {
  padding: 14px 40px;
  font-size: 1rem;
}
.quiz-global-feedback {
  display: none;
  margin-top: 16px;
  padding: 14px 24px;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
}
.quiz-global-feedback.show { display: inline-flex; align-items: center; gap: 8px; }
.quiz-global-feedback.correct {
  background: linear-gradient(135deg, rgba(58,170,100,0.12), rgba(58,170,100,0.06));
  color: #1a6b3a;
  border: 1.5px solid rgba(58,170,100,0.3);
}
.quiz-global-feedback.incorrect {
  background: rgba(201,102,62,0.08);
  color: #8a3a1a;
  border: 1.5px solid rgba(201,102,62,0.2);
}

/* Fullscreen preview */
.editor-btn-fullscreen {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  color: #fff;
  opacity: 0.6;
  transition: opacity 0.2s;
  z-index: 2;
}
.editor-btn-fullscreen:hover { opacity: 1; }
.editor-btn-fullscreen:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.editor-fullscreen-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.editor-fullscreen-close {
  position: absolute;
  top: 16px;
  right: 24px;
  padding: 8px 18px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  z-index: 1;
}
.editor-fullscreen-close:hover { background: rgba(255,255,255,0.2); }
.editor-fullscreen-iframe {
  width: 100%;
  max-width: 1200px;
  height: 80vh;
  border: none;
  border-radius: 8px;
  background: #fff;
}

.lesson-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: #fff;
  border: 1px solid var(--color-card-border);
  border-radius: 6px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-ink);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.lesson-nav-btn:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(15, 25, 35, 0.06);
  transform: translateY(-1px);
  color: var(--color-accent);
  text-decoration: none;
}
.lesson-nav-btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}
.lesson-nav-btn--prev::before { content: "\2190  "; }
.lesson-nav-btn--next::after { content: "  \2192"; }
.lesson-nav-btn--disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* Progress indicator */
.lesson-progress {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: center;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

/* ============================================================
   Course cards (lesson listing)
   ============================================================ */
.course-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.course-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}
.course-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 6px 20px rgba(15, 25, 35, 0.06);
  transform: translateY(-2px);
  text-decoration: none;
}
.course-card:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.course-card-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent-light);
  border: 2px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-edito);
  font-style: italic;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.course-card-body { flex: 1; min-width: 0; }

.course-card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
  margin: 0 0 4px;
  line-height: 1.3;
}

.course-card-desc {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

.course-card-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: var(--color-ivory-soft);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
  align-self: center;
}

/* Completed state */
.course-card.completed {
  border-color: var(--color-accent);
  background: linear-gradient(135deg, rgba(58,170,100,0.03), transparent);
}
.course-card.completed .course-card-number {
  background: var(--color-accent);
  color: #fff;
}
.course-card.completed .course-card-number::after {
  content: '✓';
  position: absolute;
  top: -4px;
  right: -4px;
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border: 2px solid #fff;
  border-radius: 50%;
  font-size: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
}
.course-card-number { position: relative; }

/* ============================================================
   Course catalog (index page) — bigger cards
   ============================================================ */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 36px;
}
@media (max-width: 700px) {
  .catalog-grid { grid-template-columns: 1fr; }
}

.catalog-card {
  display: block;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
  position: relative;
  overflow: hidden;
}
.catalog-card-logo {
  position: absolute;
  bottom: 12px;
  right: 14px;
  width: 44px;
  height: 44px;
  opacity: 0.4;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}
.catalog-card:hover .catalog-card-logo {
  opacity: 0.55;
  transform: scale(1.06);
}
.catalog-card-logo.logo-html { fill: #e44d26; }
.catalog-card-logo.logo-css { fill: #264de4; }
.catalog-card-logo.logo-js { fill: #f7df1e; }
.catalog-card-logo.logo-php { fill: #777bb4; }
.catalog-card-logo.logo-python { fill: #3776ab; }
.catalog-card-logo.logo-go { fill: #00add8; }
.catalog-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(15, 25, 35, 0.06);
  transform: translateY(-2px);
  text-decoration: none;
}
.catalog-card:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.catalog-card-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #267d42;
  margin-bottom: 12px;
  display: block;
}

.catalog-card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-ink);
  margin: 0 0 8px;
  line-height: 1.25;
}
.catalog-card-title em {
  font-family: var(--font-edito);
  font-style: italic;
  font-weight: 600;
  color: var(--color-accent);
}

.catalog-card-desc {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 0 0 16px;
}

.catalog-card-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}
.catalog-card-meta strong {
  color: var(--color-accent);
  font-weight: 600;
}

/* Catalog section labels */
.catalog-section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 36px 0 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-card-border);
}
.catalog-section-label:first-of-type {
  margin-top: 28px;
}

/* Coming soon state */
.catalog-card--soon {
  opacity: 0.5;
  pointer-events: none;
}
.catalog-card--soon .catalog-card-tag {
  color: var(--color-text-muted);
}
.catalog-card--soon::after {
  content: "Bientot";
  position: absolute;
  top: 14px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-ivory-soft);
  padding: 3px 10px;
  border-radius: 999px;
}
html[lang="en"] .catalog-card--soon::after {
  content: "Soon";
}

/* Featured card (available AI course) */
.catalog-card--featured {
  border: 2px solid var(--color-accent);
  background: linear-gradient(135deg, rgba(58, 170, 100, 0.03) 0%, #fff 100%);
}
.catalog-card--featured:hover {
  border-color: var(--color-accent-hover);
  box-shadow: 0 8px 28px rgba(58, 170, 100, 0.12);
}
.catalog-card-icon-wrap {
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  color: #fff;
}
.catalog-card-icon-wrap svg {
  width: 22px;
  height: 22px;
}

/* ============================================================
   "Pourquoi" method cards (index)
   ============================================================ */
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}
@media (max-width: 768px) {
  .method-grid { grid-template-columns: 1fr; }
}

.method-card {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--color-card-border);
  border-radius: 8px;
  text-align: center;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.method-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 6px 20px rgba(15, 25, 35, 0.05);
}

.method-card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: var(--color-accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}
.method-card-icon svg { width: 24px; height: 24px; }

.method-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
  margin: 0 0 8px;
}

.method-card p {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 0;
}

/* ============================================================
   Learn CTA
   ============================================================ */
.learn-cta {
  text-align: center;
  padding: 48px 24px;
  background: var(--color-ivory-soft);
  border-top: 1px solid var(--color-rule);
}
.learn-cta .btn-primary {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 32px;
  border-radius: 8px;
  background: var(--color-accent-dark);
  color: #fff;
  text-decoration: none;
  transition: background 0.2s, box-shadow 0.2s;
  border: 2px solid transparent;
}
.learn-cta .btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 8px 24px rgba(50, 158, 90, 0.25);
  color: #fff;
  text-decoration: none;
}
.learn-cta .btn-primary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}
.learn-cta p {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--color-text-muted);
  margin-top: 10px;
  letter-spacing: 0.04em;
}

/* ============================================================
   SEO content sections (i18n)
   ============================================================ */
[data-lang="en"] { display: none; }
html[lang="en"] [data-lang="en"] { display: block; }
html[lang="en"] [data-lang="fr"] { display: none; }

/* ============================================================
   Responsive
   ============================================================ */

/* Tablet */
@media (max-width: 900px) {
  .lesson-container { padding: 36px 20px 48px; }
  .lesson-hero { padding: 80px 20px 32px; }
}

/* Mobile */
@media (max-width: 600px) {
  .lesson-hero { padding: 72px 16px 28px; }
  .lesson-hero-inner { padding: 0; }
  .lesson-container { padding: 28px 16px 40px; }

  /* Editor stacks vertically */
  .editor-split {
    grid-template-columns: 1fr;
  }
  .editor-preview-wrap {
    border-left: none;
    border-top: 1px solid var(--color-card-border);
  }
  .editor-textarea { min-height: 160px; }
  .editor-preview { min-height: 160px; }
  .lesson-section li { padding: 8px 12px 8px 14px; font-size: 0.92rem; }
  .css-pattern code { font-size: 1rem; }
  .css-pattern-labels { flex-direction: column; gap: 8px; align-items: center; }

  /* Cards */
  .course-card { padding: 16px 18px; gap: 14px; }
  .course-card-number { width: 36px; height: 36px; font-size: 1rem; }

  /* Nav */
  .lesson-nav {
    flex-direction: column;
    align-items: stretch;
    padding: 0 16px 36px;
  }
  .lesson-nav-btn { justify-content: center; }

  /* AI box */
  .ai-prompt { font-size: 0.78rem; padding: 14px 14px 48px; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   Print
   ============================================================ */
@media print {
  .lesson-hero { background: #fff; color: #000; padding: 24px; }
  .editor-container, .ai-box, .quiz-box { break-inside: avoid; }
  .lesson-nav, .learn-cta { display: none; }
}