/* ==========================================================================
   Design tokens — palette, espacements, rayons, ombres, transitions
   Garde l'identité existante (crème + bleu marine, esprit LaTeX) et
   uniformise ce qui était codé en dur un peu partout.
   ========================================================================== */
:root {
  --color-bg: #fcf3f3;
  --color-ink: #022945;

  --color-menu: #326a95;
  --color-menu-hover: #27577c;
  --color-menu-submenu: #2d628b;
  --color-menu-dark: #022945;
  --color-menu-darker: #012846;
  --color-menu-border: #043f6c;
  --color-langues: #064979;

  --color-menu-link: #ebebf5;
  --color-menu-link-hover: #aab6f3;

  --color-accent: #3f82b6;
  --color-accent-hover: #5c6cbc;

  --color-panel: #ebf4ff;
  --color-panel-active: #d0def0;
  --color-border: #326a95;
  --color-scroll-track: #c8d5e5;

  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --space-1: 0.4em;
  --space-2: 0.8em;
  --space-3: 1.3em;
  --space-4: 2em;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s var(--ease);
  --transition-base: 0.3s var(--ease);

  --shadow-sm: 0 1px 3px rgba(2, 41, 69, 0.1);
  --shadow-md: 0 6px 20px rgba(2, 41, 69, 0.14);
}

.multi_pdf {
  margin-right:5%;
  margin-left: 5%;
  margin-bottom:5%;
}

@media only screen and (min-width: 1300px) {
  .multi_pdf {
    margin-right:5%;
    margin-left: 5%;
    margin-bottom:5%;
    position: relative;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: space-evenly;
        -ms-flex-pack: space-evenly;
            justify-content: space-evenly;
  }
}

html {
  overflow: auto; /* Ensure element is scrollable */
  -ms-overflow-style: none;  /* Internet Explorer 10+ */
  scrollbar-width: none;  /* Firefox */
}

html::-webkit-scrollbar {
    display: none;  /* Safari and Chrome */
}

/* Rien ne s'affiche tant que le menu/contenu (chargés en JS) ne sont pas en
   place ; html.loading est retiré par script.js une fois loadPage() résolu. */
html.loading body {
  visibility: hidden;
}

/* Navigation interne (clic sur un lien du menu) : la page actuelle reste
   affichée telle quelle, seul le curseur change, le temps que la page
   suivante soit prête (voir navigateTo() dans script.js). */
html.nav-loading,
html.nav-loading * {
  cursor: wait !important;
}

/* Menu link styles */
.menu a:link,
.menu a:visited {
  color: var(--color-menu-link);
  background-color: transparent;
  text-decoration: none;
}
.menu a:hover {
  transition: color var(--transition-base);
  color: var(--color-menu-link-hover);
}

/* General link styles */
a:link,
a:visited {
  color: var(--color-accent);
  background-color: transparent;
  text-decoration: none;
}
a:hover {
  transition: color var(--transition-base);
  color: var(--color-accent-hover);
}

/* Body styles */
body {
  background: var(--color-bg);
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  font-family: serif;
  color: var(--color-ink);
  padding-left: calc(240px + 2em);
  scrollbar-width: thin; /* Makes the scrollbar thinner */
}

/* Menu styles */
.menu {
  z-index: 100;
  width: 240px;
  box-sizing: border-box;
  background: var(--color-menu);
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  outline: none;
  overflow: auto; /* Hides both horizontal and vertical scrollbars */
  -ms-overflow-style: none;  /* Internet Explorer 10+ */
  scrollbar-width: none;  /* Firefox */
  display: flex; /* Enable flexbox for the .menu */
  flex-direction: column; /* Stack elements vertically */
  box-shadow: var(--shadow-md);
}

.menu::-webkit-scrollbar {
    display: none;  /* Safari and Chrome */
}

/* Bouton hamburger + fond assombri : uniquement utilisés en dessous de
   768px (voir media query plus bas), masqués par défaut pour ne rien
   afficher sur desktop où le menu reste une barre latérale classique. */
.menu-toggle,
.menu-overlay {
  display: none;
}

/* Avatar styles */
.avatar {
  width: 100%;
  box-sizing: border-box;
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--color-menu-dark);
  padding: 1.3em 1em;
  text-align: center;
  color: var(--color-menu-link);
}
.avatar img {
  width: 100px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--color-menu-border);
  box-shadow: 0 0 0 4px var(--color-menu-darker);
}
.avatar h2 {
  font-weight: 150;
  margin-bottom: 0;
}
.avatar h3 {
  font-weight: 50;
  padding: 0.5em 1em;
  font-size: 0.8em;
  margin-bottom: 0;
}

/* List styles */
ul {
  z-index: 100;
  position: relative;
  text-align: center;
  list-style: none;
  padding: 1em 0;
  margin: 0;
  width: 100%;
}
ul li {
  padding: 0.65em 1.5em;
  font-size: 0.95em;
  color: var(--color-ink);
  font-weight: 550;
  position: relative;
  transition: background-color var(--transition-base), color var(--transition-base);
  cursor: pointer;
}
ul li ul {
  width: 100%;
  z-index: 100;
  list-style: none;
  padding: 0;
  margin: 0;
  position: absolute;
  left: 100%;
  top: 0;
  background-color: var(--color-menu-submenu);
  opacity: 0;
  transition: visibility 0.3s var(--ease), opacity 0.3s var(--ease);
  visibility: hidden;
}
ul li:hover {
  background-color: var(--color-menu-hover);
}
ul li:hover ul {
  opacity: 1;
  visibility: visible;
}

/* Other styles */
.bandeau {
  margin-right:5%;
  margin-left: 5%;
  margin-bottom:5%;
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: space-evenly;
      -ms-flex-pack: space-evenly;
          justify-content: space-evenly;
}
.bandeau img {
  border-radius: var(--radius-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.bandeau img:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}
main {
  margin-bottom:5%;
  margin-right:7%;
  margin-left: 7%;
  position: relative;
}
p {
  text-align: justify;
  text-indent: 20px;
}
.premier {
  text-indent: 0;
}
.nameSearch,
.dateSearch,
.placeSearch {
  width: auto;
  box-sizing: border-box;
  height: 44px;
  font-family: inherit;
  font-size: 16px;
  padding: 12px 20px 12px 10px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.nameSearch:focus,
.dateSearch:focus,
.placeSearch:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(63, 130, 182, 0.25);
}
.liste_truc {
  width:50%;
  max-height: 200px;
  height: auto;
  overflow-y: auto;
  list-style-type: none;
  padding: 0;
  margin: 0;
  z-index: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
  scrollbar-width: thin; /* Makes the scrollbar thinner */
  scrollbar-color: var(--color-ink) var(--color-scroll-track); /* thumb color track color */
}

.liste_truc::-webkit-scrollbar {
  width: 12px; /* Width of the entire scrollbar */
}

.liste_truc::-webkit-scrollbar-track {
  background: var(--color-scroll-track); /* Color of the background */

}

.liste_truc::-webkit-scrollbar-thumb {
  background-color: var(--color-ink); /* Color of the scrollbar thumb */
  border: 3px solid var(--color-scroll-track); /* Space around the thumb to show the track */
}

.liste_truc li {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-panel);
  padding: 12px;
  text-decoration: none;
  color: var(--color-ink);
  display: block;
  transition: background-color var(--transition-fast);
}
.liste_truc li.clicked {
  background-color: var(--color-panel-active);
}

.liste_truc li.still_clicked {
  background-color: var(--color-panel-active);
  transition: none;
}

.liste_truc li:last-child {
  border: none;
}
.liste_truc li:hover:not(.header) {
  background-color: var(--color-panel-active);
  transition: background-color var(--transition-base);
}

.integ_pdf {
  width: 500px;
  height: 600px;
  margin: 0 auto;
  overflow: hidden;
  resize:both;
  position:center;
  display:flex;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.pdfIframe{
  width: 90%;
  height: 99%;
  margin: 0 auto;
}


.choixEnonce,
.choixSolution {
  display: inline-block;
  width: auto;
  background-color: var(--color-panel);
  font-size: 16px;
  padding: 12px 20px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  margin-bottom: 15px;
  transition: background-color var(--transition-fast);
}
.choixSolution {
  margin: 0 5em 0 0;
  border-left: none;
}
.choixEnonce.clicked,
.choixSolution.clicked {
  background-color: var(--color-panel-active);
}
.choixEnonce:hover:not(.header),
.choixSolution:hover:not(.header) {
  background-color: var(--color-panel-active);
  transition: background-color var(--transition-base);
}

.titre {
  font-size: 2.1em;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  padding-bottom: var(--space-1);
  border-bottom: 2px solid var(--color-panel-active);
  margin-bottom: var(--space-3);
}

.sous_titre {
  font-size: 1.5em;
  -webkit-box-pack: left;
      -ms-flex-pack: left;
          justify-content: left;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: left;
      -ms-flex-align: left;
          align-items: left;
}

.langues{
  width: 100%;
  box-sizing: border-box;
  background: var(--color-langues);
  padding: 0.7em 1em;
  text-align: center;
  color: var(--color-menu-link);
  margin-top: auto;
}

.boutton_langue {
  border: none;
  cursor: pointer;
  appearance: none;
  background-color: inherit;
  border-radius: 50%;
  transition: transform .7s ease-in-out, box-shadow var(--transition-fast);
}

.boutton_langue:hover{
  transform: rotate(360deg);
  box-shadow: 0 0 0 3px rgba(235, 235, 245, 0.35);
}

.drapeaux{
  width: 30px;
  height: 25px;
  border-radius: 3px;
}

#fr{
  width: 31px;
  height: 26px;
}

footer {
  margin-bottom:5em;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropbtn {
  min-width: 7em;
  width: auto;
  height: 44px;
  background-color: var(--color-panel);
  box-sizing: border-box;
  font-family: inherit;
  font-size: 16px;
  padding: 12px 20px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  transition: background-color var(--transition-fast);
}

.dropdown-content {
  display: none;
  position: absolute;
  box-sizing: border-box;
  max-height: 200px;
  width:100%;
  height: auto;
  overflow-y: auto;
  list-style-type: none;
  border-right: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-panel);
  scrollbar-width: thin; /* Makes the scrollbar thinner */
  scrollbar-color: var(--color-ink) var(--color-scroll-track); /* thumb color track color */
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-sm);
  z-index: 1;
}

.dropdown-content a {
  color: var(--color-ink);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  transition: background-color var(--transition-fast);
}

.dropdown-content a:hover {
  background-color: var(--color-panel-active);
  transition: background-color var(--transition-base);
}

.dropdown-content a.clicked {
  background-color: var(--color-panel-active);
}

/* Custom scrollbar styling for WebKit browsers */
.dropdown-content::-webkit-scrollbar {
  width: 8px;
}

.dropdown-content::-webkit-scrollbar-thumb {
  background-color: var(--color-ink);
}

.dropdown-content::-webkit-scrollbar-track {
  background-color: var(--color-scroll-track);
}

.dropdown:hover .dropdown-content {
  display: block;
}

/* Popup multi-colonnes (domaine, mots-clés) : plus lisible qu'un menu
   déroulant vertical dès qu'il y a beaucoup de valeurs. */
.exo-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 41, 69, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5em;
  box-sizing: border-box;
}

.exo-popup-panel {
  background: var(--color-bg);
  color: var(--color-ink);
  border: 2px solid var(--color-border);
  border-radius: 8px;
  max-width: 46em;
  width: 100%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(2, 41, 69, 0.35);
}

.exo-popup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9em 1.2em;
  border-bottom: 2px solid var(--color-border);
  font-weight: bold;
}

.exo-popup-close {
  background: none;
  border: none;
  color: var(--color-ink);
  font-size: 1.4em;
  line-height: 1;
  cursor: pointer;
  padding: 0 0.2em;
}

.exo-popup-close:hover {
  color: var(--color-accent-hover);
}

.exo-popup-mode {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5em;
  padding: 0.8em 1.2em 0;
  font-size: 0.85em;
}

.exo-popup-mode-label {
  opacity: 0.8;
  white-space: nowrap;
}

.exo-popup-mode button {
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-ink);
  border-radius: 999px;
  padding: 0.3em 0.9em;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}

.exo-popup-mode button:hover {
  background-color: var(--color-panel-active);
}

.exo-popup-mode button.active {
  background-color: var(--color-accent);
  color: var(--color-menu-link);
  border-color: var(--color-accent);
}

.exo-popup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9em, 1fr));
  gap: 0.4em;
  padding: 1.2em;
  overflow-y: auto;
}

.exo-popup-grid a {
  color: var(--color-ink);
  text-decoration: none;
  padding: 0.6em 0.8em;
  border-radius: 6px;
  background: var(--color-panel);
  transition: background-color var(--transition-fast);
  text-align: center;
}

.exo-popup-grid a:hover {
  background-color: var(--color-panel-active);
  transition: background-color var(--transition-base);
}

.exo-popup-grid a.clicked {
  background-color: var(--color-accent);
  color: var(--color-menu-link);
}

.exo-popup-empty {
  grid-column: 1 / -1;
  text-align: center;
  opacity: 0.7;
}

@media only screen and (max-width: 768px) {
  body {
    padding-left: 0;
    padding-top: 4em;
    font-size: 14px;
    position:relative;
    margin-left: 1.2em;
    margin-right: 1.2em;
  }

  /* Le menu devient un tiroir hors-écran (plutôt qu'une barre latérale
     étroite en 30vw où le texte de l'avatar débordait et poussait les
     drapeaux hors de portée) : ouvert/fermé via .menu-toggle, voir
     setMobileMenuOpen() dans script.js. */
  .menu-toggle {
    display: flex;
    position: fixed;
    top: 0.8em;
    left: 0.8em;
    z-index: 200;
    width: 44px;
    height: 44px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    box-sizing: border-box;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-menu);
    box-shadow: var(--shadow-md);
    cursor: pointer;
  }

  .menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-menu-link);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  html.menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  html.menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }
  html.menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .menu-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 150;
    background: rgba(2, 41, 69, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  html.menu-open .menu-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .menu {
    z-index: 160;
    background: var(--color-menu);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    outline: none;
    width: 78vw;
    max-width: 300px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    /* Le tiroir lui-même ne scrolle pas : seul .avatar (ci-dessous) absorbe
       un éventuel débordement, pour que .special (liens) et .langues
       (drapeaux) restent toujours entièrement visibles sans avoir à
       scroller le menu jusqu'en bas. */
    overflow: hidden;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  html.menu-open .menu {
    transform: translateX(0);
  }

  .avatar {
    width: 100%;
    padding: 2em 1em 1em;
    /* Grandit/rétrécit pour occuper l'espace restant une fois .special et
       .langues placés à leur taille naturelle (flex-shrink: 0 ci-dessous) ;
       min-height: 0 est nécessaire pour qu'un flex item puisse réellement
       scroller au lieu de forcer le conteneur à déborder. */
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
  }

  .avatar::-webkit-scrollbar {
    display: none;
  }

  .avatar img {
    width: 72px;
  }

  .bandeau, main {
    margin: 5% 2%;
  }

  .special {
    flex: 0 0 auto;
  }

  .special ul {
    width: 100%;
    padding: 1em 0;
    margin: 0;
  }

  ul li {
    padding: 0.7em 1em;
    font-size: 0.85em;
    word-break: break-word;
  }

  ul li ul {
    width: 100%;
    padding: 0;
    margin: 0;
  }

  .liste_truc {
    max-height: 150px;
  }

  .integ_pdf {
    width: 100%;
    height: auto;
  }

  .choixSolution {
    margin: 0 1em 0 0;
  }

  .titre {
    text-align: center;
    font-size: 1.8em;
  }

  .sous_titre {
    font-size: 1.2em;
  }

  .drapeaux{
    width: 32px;
    height: 27px;
  }

  #fr{
    width: 33px;
    height: 28px;
  }

  .langues > .boutton_langue {
    transition: none;
  }

  .bandeau img{
    height: 100px;
  }

  .langues{
    width: 100%;
    flex: 0 0 auto;
    justify-content: center;
    align-items: center;
    display: flex;
    flex-direction: row;
    gap: 1em;
    padding: 1.2em 0;
  }

  .avatar h3 a {
    word-break: break-all;
  }
}

/* ==========================================================================
   Banque d'exercices — cartes, tags, étoiles, sélection multiple
   ========================================================================== */
.exo-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.exo-toolbar .nameSearch {
  /* Annule le margin-bottom partagé avec les pages en liste verticale : ici
     la barre de recherche est un élément parmi d'autres dans une rangée. */
  margin-bottom: 0;
}

.exo-stars {
  display: inline-flex;
  align-items: center;
  height: 44px;
  box-sizing: border-box;
  gap: 2px;
  font-size: 1.3em;
  line-height: 1;
  cursor: pointer;
  user-select: none;
}
.exo-stars .exo-star {
  color: var(--color-panel-active);
  transition: color var(--transition-fast);
}
.exo-stars .exo-star.filled {
  color: var(--color-accent);
}
.exo-stars .exo-star.hover {
  color: var(--color-accent-hover);
}

.exo-type-filter {
  display: inline-flex;
  align-items: center;
  height: 44px;
  box-sizing: border-box;
  gap: 0.4em;
}
.exo-type-filter button {
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-ink);
  border-radius: 999px;
  padding: 0.3em 0.9em;
  cursor: pointer;
  white-space: nowrap;
  font-size: 0.85em;
  transition: background-color var(--transition-fast);
}
.exo-type-filter button:hover {
  background-color: var(--color-panel-active);
}
.exo-type-filter button.active {
  background-color: var(--color-accent);
  color: var(--color-menu-link);
  border-color: var(--color-accent);
}

.exo-count {
  color: var(--color-menu-hover);
  font-size: 0.9em;
}

.exo-export {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.exo-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.exo-btn {
  display: inline-block;
  box-sizing: border-box;
  background-color: var(--color-panel);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  font-size: 16px;
  font-family: inherit;
  color: var(--color-ink);
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.exo-btn:hover:not(:disabled) {
  background-color: var(--color-panel-active);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.exo-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.exo-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.exo-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-panel);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.exo-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.exo-card.selected {
  background-color: var(--color-panel-active);
  border-color: var(--color-accent);
}

.exo-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.exo-card-title {
  font-weight: 550;
  font-size: 1.05em;
}

.exo-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 6px 0;
}

/* Pas de titre : les étoiles n'ont plus de bande à elles, elles rejoignent
   la ligne niveau/domaine (alignées avec elle, poussées à droite). */
.exo-tags .exo-card-meta {
  margin-left: auto;
}

.exo-card-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.exo-card-id {
  color: #a3a3a3;
  font-size: 0.72em;
  letter-spacing: 0.03em;
  font-family: monospace;
}

.exo-tag {
  display: inline-block;
  font-size: 0.78em;
  padding: 3px 10px;
  border-radius: 999px;
  background-color: var(--color-menu-link);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
}
.exo-tag.exo-tag-niveau {
  background-color: var(--color-menu-dark);
  color: var(--color-menu-link);
  border-color: var(--color-menu-dark);
}
.exo-tag.exo-tag-probleme {
  background-color: #7d0331;
  color: #fff;
  border-color: #7d0331;
  font-weight: bold;
}

.exo-body {
  text-align: justify;
}
.exo-body p {
  text-indent: 0;
}

.exo-footnote {
  font-style: italic;
  opacity: 0.75;
  font-size: 0.92em;
}

.exo-partie {
  margin: var(--space-3) 0 var(--space-1);
  font-size: 1em;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-panel-active);
  padding-bottom: var(--space-1);
}

.exo-itemize {
  margin: var(--space-2) 0;
  padding-left: var(--space-4);
  text-align: left;
}
.exo-itemize li {
  margin-bottom: var(--space-1);
}

.exo-figure {
  display: flex;
  justify-content: center;
  margin: var(--space-2) 0;
}
.exo-figure svg {
  /* Sans largeur/hauteur explicites sur le <svg> (seulement un viewBox),
     un simple "max-width: 100%" le laisse s'étirer à la largeur de la
     carte (jusqu'à 600px+) au lieu de sa taille de lecture naturelle :
     on fixe donc une largeur cible raisonnable, plafonnée par le
     conteneur pour rester responsive sur mobile. */
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
}

.exo-card > .exo-btn {
  margin-top: var(--space-1);
}

/* Boutons de la barre d'outils/export alignés sur la même hauteur que les
   champs de recherche et les listes déroulantes (44px) — pas le bouton
   "Corrigé" à l'intérieur d'une carte, plus petit intentionnellement. */
.exo-toolbar .exo-btn,
.exo-export .exo-btn {
  height: 44px;
}

.exo-corrige {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-border);
}

.exo-empty {
  color: var(--color-menu-hover);
  font-style: italic;
}

@media only screen and (max-width: 768px) {
  .exo-card {
    padding: var(--space-1) var(--space-2);
  }
}