:root {
  --fond: #f7f5f0;
  --panneau: #ffffff;
  --texte: #1f2933;
  --texte-doux: #52606d;
  --accent: #2563eb;
  --accent-doux: #dbeafe;
  --barre: #3b82f6;
  --barre-survol: #1d4ed8;
  --erreur: #b91c1c;
  --erreur-fond: #fef2f2;
  --bordure: #e4e0d8;
  --rayon: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--fond);
  color: var(--texte);
  line-height: 1.55;
}

.entete {
  padding: 2rem 1.25rem 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

.entete h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
}

.sous-titre {
  margin: 0;
  color: var(--texte-doux);
  max-width: 60ch;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  display: grid;
  gap: 1.5rem;
}

.panneau {
  background: var(--panneau);
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 1.25rem;
}

.panneau h2 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.panneau-haut {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.tri { display: flex; gap: 0.4rem; }

.bouton-tri {
  border: 1px solid var(--bordure);
  background: var(--panneau);
  color: var(--texte-doux);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.bouton-tri[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.graphe-conteneur { position: relative; }

#graph {
  width: 100%;
  height: auto;
  display: block;
}

#graph .barre {
  fill: var(--barre);
  cursor: pointer;
  transition: fill 0.15s ease;
}

#graph .barre:hover,
#graph .barre:focus { fill: var(--barre-survol); outline: none; }

#graph .barre.selectionnee { fill: var(--accent); stroke: #1e3a8a; stroke-width: 1.5; }

#graph text { fill: var(--texte); font-size: 12px; }
#graph .axe text { fill: var(--texte-doux); font-size: 11px; }
#graph .axe line, #graph .axe path { stroke: var(--bordure); }

.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--texte);
  color: #fff;
  padding: 0.4rem 0.65rem;
  border-radius: 6px;
  font-size: 0.8rem;
  line-height: 1.35;
  max-width: 240px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  z-index: 5;
}

.astuce {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--texte-doux);
}

.alerte {
  background: var(--erreur-fond);
  color: var(--erreur);
  border: 1px solid #fecaca;
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
}

form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

#sentence {
  width: 100%;
  border: 1px solid var(--bordure);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  resize: vertical;
  background: #fff;
  color: var(--texte);
}

.form-pied {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.6rem;
}

.compteur { font-size: 0.8rem; color: var(--texte-doux); }

.confidentialite { font-size: 0.75rem; color: var(--texte-doux); font-style: italic; }

.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }

button {
  font: inherit;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  cursor: pointer;
}

#btn-traduire { background: var(--accent); color: #fff; }
#btn-tout-ecouter { background: var(--accent-doux); color: #1e3a8a; border-color: #bfdbfe; }
#btn-arreter { background: #fff; color: var(--erreur); border-color: #fecaca; }

button:disabled { opacity: 0.45; cursor: not-allowed; }

button:focus-visible,
.bouton-tri:focus-visible,
#sentence:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.statut {
  min-height: 1.4em;
  margin: 0.75rem 0 0;
  color: var(--texte-doux);
  font-size: 0.9rem;
}

.cartes {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.9rem;
}

.carte {
  border: 1px solid var(--bordure);
  border-radius: var(--rayon);
  padding: 0.85rem;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.carte.selectionnee {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-doux);
}

.carte.erreur { background: var(--erreur-fond); border-color: #fecaca; }

.carte-tete {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.carte-langue { font-weight: 700; }
.carte-code {
  font-size: 0.75rem;
  color: var(--texte-doux);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.carte-texte { margin: 0; min-height: 2.6em; }

.carte .msg-erreur {
  margin: 0;
  color: var(--erreur);
  font-size: 0.85rem;
}

.carte-actions { display: flex; gap: 0.45rem; margin-top: auto; }

.carte-actions button {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  background: var(--accent-doux);
  color: #1e3a8a;
  border-color: #bfdbfe;
}

.carte-actions .btn-reessayer { background: #fff; color: var(--erreur); border-color: #fecaca; }

.sans-voix { font-size: 0.8rem; color: var(--texte-doux); font-style: italic; }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--bordure);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: tourne 0.8s linear infinite;
  display: inline-block;
  vertical-align: -3px;
}

@keyframes tourne { to { transform: rotate(360deg); } }

.pied {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  color: var(--texte-doux);
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  .panneau { padding: 1rem; }
  .actions { width: 100%; }
  .actions button { flex: 1; }
}

/* Layout adjustments for main content */
@media (min-width: 900px) {
  main {
    grid-template-columns: 1fr 380px;
    align-items: start;
  }
}

.contenu-principal {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.barre-laterale {
  position: sticky;
  top: 2rem;
}

.panneau-traduction {
  background: var(--accent-doux);
  border-color: #bfdbfe;
}