/* =========================================================================
   Guide d'étude Halterofit — Feuille de style
   Thème sombre, mobile-first. Aucune dépendance externe.
   ========================================================================= */

:root {
  /* Palette sombre (cohérente avec l'app Halterofit, dark mode only) */
  --bg:            #0d0f13;   /* fond global */
  --surface:       #14171d;   /* cartes, barre latérale */
  --elevated:      #1b1f27;   /* encadrés, blocs de code */
  --border:        #272d38;   /* lignes de séparation */
  --border-soft:   #1f2530;
  --text:          #e8ebf1;   /* texte principal */
  --muted:         #9aa4b5;   /* texte secondaire */
  --faint:         #6b7385;   /* texte tertiaire / légendes */

  /* Accents */
  --primary:       #5b9dff;   /* bleu — liens, titres de section */
  --primary-soft:  rgba(91, 157, 255, 0.12);
  --green:         #51d88a;   /* à retenir */
  --green-soft:    rgba(81, 216, 138, 0.10);
  --amber:         #f5b14c;   /* exercices */
  --amber-soft:    rgba(245, 177, 76, 0.10);
  --violet:        #b08cff;   /* quiz */
  --violet-soft:   rgba(176, 140, 255, 0.10);
  --red:           #ff6b6b;   /* pièges */
  --red-soft:      rgba(255, 107, 107, 0.10);
  --teal:          #4fd1c5;   /* transfert */
  --teal-soft:     rgba(79, 209, 197, 0.10);

  --radius:        12px;
  --sidebar-w:     290px;
  --content-max:   760px;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
               Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas,
               "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ===================== Mise en page générale ===================== */

.layout { display: flex; min-height: 100vh; }

/* ---- Barre latérale ---- */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 22px 18px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border-soft);
}
.sidebar__logo {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--violet));
  display: grid; place-items: center;
  font-weight: 800; font-size: 18px; color: #fff;
  flex-shrink: 0;
}
.sidebar__title { font-weight: 700; font-size: 16px; line-height: 1.25; }
.sidebar__subtitle { font-size: 12px; color: var(--faint); }

.nav__group-label {
  padding: 16px 22px 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 700;
}
.nav a {
  display: block;
  padding: 8px 22px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14.5px;
  border-left: 3px solid transparent;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.nav a:hover { background: var(--elevated); color: var(--text); }
.nav a.active {
  color: var(--text);
  background: var(--primary-soft);
  border-left-color: var(--primary);
  font-weight: 600;
}
.nav a .num {
  display: inline-block;
  width: 1.6em;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.nav a.active .num { color: var(--primary); }

/* ---- Contenu ---- */
.content { flex: 1; min-width: 0; }
.content__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 32px 96px;
}

/* ---- Barre supérieure mobile (cachée sur desktop) ---- */
.topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 30;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(13, 15, 19, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar__title { font-weight: 700; font-size: 15px; }
.hamburger {
  appearance: none;
  background: var(--elevated);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px; height: 40px;
  border-radius: 9px;
  font-size: 18px;
  cursor: pointer;
  display: grid; place-items: center;
}
.backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 35;
}

/* ===================== Typographie ===================== */

h1 {
  font-size: 30px;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}
h2 {
  font-size: 23px;
  margin: 44px 0 14px;
  padding-top: 8px;
  letter-spacing: -0.01em;
  border-top: 1px solid var(--border-soft);
}
h2:first-of-type { border-top: none; }
h3 { font-size: 18.5px; margin: 30px 0 10px; }
p { margin: 0 0 16px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: #fff; font-weight: 650; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin: 6px 0; }
hr { border: none; border-top: 1px solid var(--border); margin: 36px 0; }
.lead { font-size: 18.5px; color: var(--muted); margin-bottom: 28px; }

/* Code en ligne */
:not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--elevated);
  border: 1px solid var(--border-soft);
  padding: 1px 6px;
  border-radius: 6px;
  color: #f2c4a0;
  white-space: nowrap;
}

/* ===================== Blocs de code ===================== */

pre[class*="language-"] {
  margin: 0 0 8px;
  padding: 16px 18px;
  background: #0f1218 !important;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.65;
  -webkit-overflow-scrolling: touch;
  tab-size: 2;
}
pre[class*="language-"] code {
  font-family: var(--font-mono);
  white-space: pre;
}

/* Étiquette de fichier au-dessus d'un bloc de code */
.code-file {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faint);
  background: var(--elevated);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 6px 12px;
  margin-top: 8px;
}
.code-file + pre[class*="language-"] { border-radius: 0 0 var(--radius) var(--radius); margin-top: 0; }
.code-file .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }

/* La coloration Prism : commentaires plus visibles (vert doux) */
.token.comment { color: #7d8aa0 !important; font-style: italic; }

/* Légende sous un bloc de code */
.code-caption {
  font-size: 13.5px;
  color: var(--faint);
  margin: -2px 0 18px;
  padding-left: 2px;
}

/* ===================== Encadrés pédagogiques ===================== */

.box {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 22px 0;
  background: var(--surface);
}
.box > :last-child { margin-bottom: 0; }
.box__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}
.box__title .ico { font-size: 17px; line-height: 1; }

.box--concept   { border-left-color: var(--primary); background: linear-gradient(180deg, var(--primary-soft), transparent 60%); }
.box--concept .box__title { color: var(--primary); }

.box--halterofit { border-left-color: var(--violet); }
.box--halterofit .box__title { color: var(--violet); }

.box--retenir   { border-left-color: var(--green); background: var(--green-soft); }
.box--retenir .box__title { color: var(--green); }

.box--piege     { border-left-color: var(--red); background: var(--red-soft); }
.box--piege .box__title { color: var(--red); }

.box--transfert { border-left-color: var(--teal); background: var(--teal-soft); }
.box--transfert .box__title { color: var(--teal); }

.box--note      { border-left-color: var(--faint); }
.box--note .box__title { color: var(--muted); }

/* ---- Exercice de lecture ---- */
.exercice {
  border: 1px solid var(--border);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 24px 0;
  background: var(--amber-soft);
}
.exercice__title {
  display: flex; align-items: center; gap: 8px;
  color: var(--amber);
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 10px;
}
.exercice details {
  margin-top: 12px;
  border-top: 1px dashed var(--border);
  padding-top: 6px;
}
.exercice summary {
  cursor: pointer;
  color: var(--amber);
  font-weight: 600;
  font-size: 14.5px;
  padding: 8px 0;
  list-style: none;
  user-select: none;
}
.exercice summary::-webkit-details-marker { display: none; }
.exercice summary::before { content: "▸ "; display: inline-block; transition: transform 0.15s; }
.exercice details[open] summary::before { content: "▾ "; }
.exercice details > :not(summary) { animation: fade 0.2s ease; }

@keyframes fade { from { opacity: 0; transform: translateY(-2px); } to { opacity: 1; } }

/* ---- Quiz ---- */
.quiz {
  border: 1px solid var(--border);
  border-left: 4px solid var(--violet);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 24px 0;
  background: var(--violet-soft);
}
.quiz__title {
  display: flex; align-items: center; gap: 8px;
  color: var(--violet);
  font-weight: 700; font-size: 15px;
  margin-bottom: 6px;
}
.quiz__q { font-weight: 600; margin: 16px 0 6px; }
.quiz__q:first-of-type { margin-top: 8px; }
.quiz details {
  background: var(--elevated);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 0 12px;
  margin-top: 4px;
}
.quiz summary {
  cursor: pointer;
  color: var(--violet);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 0;
  list-style: none;
}
.quiz summary::-webkit-details-marker { display: none; }
.quiz summary::before { content: "Voir la réponse  ▸"; }
.quiz details[open] summary::before { content: "Réponse  ▾"; }
.quiz details[open] summary { color: var(--text); }
.quiz details > p { margin: 0 0 12px; font-size: 15px; }

/* ===================== Tableaux ===================== */
.table-wrap { overflow-x: auto; margin: 18px 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; background: var(--surface); }
td code { white-space: nowrap; }

/* ===================== Navigation bas de page ===================== */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.pager a {
  flex: 1;
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  transition: border-color 0.12s, background 0.12s;
}
.pager a:hover { border-color: var(--primary); background: var(--elevated); }
.pager .dir { font-size: 12px; color: var(--faint); }
.pager .label { color: var(--text); font-weight: 600; font-size: 14.5px; }
.pager .next { text-align: right; }
.pager .ghost { visibility: hidden; }

/* ===================== Accueil ===================== */
.hero { margin-bottom: 36px; }
.cards { display: grid; gap: 14px; grid-template-columns: 1fr; margin: 22px 0; }
.card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 18px;
  background: var(--surface);
  text-decoration: none;
  transition: border-color 0.12s, transform 0.12s, background 0.12s;
}
.card:hover { border-color: var(--primary); background: var(--elevated); transform: translateY(-1px); text-decoration: none; }
.card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
}
.card__title { color: var(--text); font-weight: 700; font-size: 16.5px; margin: 4px 0 6px; }
.card__desc { color: var(--muted); font-size: 14px; line-height: 1.55; }

.tag {
  display: inline-block;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--muted);
  background: var(--elevated);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 20px;
  margin: 0 6px 6px 0;
}

/* ===================== Responsive (mobile-first switch) ===================== */
@media (max-width: 880px) {
  body { font-size: 16px; }

  .topbar { display: flex; }

  .sidebar {
    position: fixed;
    top: 0; left: 0;
    z-index: 40;
    height: 100vh;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    box-shadow: 0 0 40px rgba(0,0,0,0.5);
  }
  .sidebar.open { transform: translateX(0); }
  body.menu-open .backdrop { display: block; }

  .content__inner { padding: 24px 18px 80px; }

  h1 { font-size: 25px; }
  h2 { font-size: 20px; margin-top: 36px; }
  h3 { font-size: 17px; }
  .lead { font-size: 16.5px; }

  pre[class*="language-"] { font-size: 12.5px; padding: 13px 14px; }

  .pager { flex-direction: column; }
  .pager .ghost { display: none; }
}

/* Petits écrans : un peu plus serré */
@media (max-width: 480px) {
  .content__inner { padding: 20px 14px 72px; }
  pre[class*="language-"] { font-size: 12px; }
}