/* =====================================================================
   Quiz du jour — Mini App Telegram. Theme clair fixe (comme brief/planning).
   Onglets enfants (haut) + sous-onglets matieres + cartes de questions QCM.
   ===================================================================== */
:root {
  --bg: #eef2f6; --card: #ffffff; --text: #0f172a; --hint: #64748b;
  --sep: color-mix(in srgb, var(--text) 12%, transparent);
  --accent: #2563eb; --radius: 16px; --pad: 14px; --maxw: 720px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body { background: var(--bg); color: var(--text); font-family: var(--font); font-size: 16px;
  line-height: 1.45; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
.app { max-width: var(--maxw); margin: 0 auto; min-height: 100%; display: flex; flex-direction: column; }

.loader { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--hint); background: var(--bg); font-size: 15px; z-index: 50; transition: opacity .25s; }
.loader.hidden { opacity: 0; pointer-events: none; }

/* En-tete */
.head { padding: calc(7px + env(safe-area-inset-top, 0px)) var(--pad) 9px; color: #fff;
  background: linear-gradient(135deg, #2563eb, #1e3a8a); transition: background .25s; }
.head-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.head .q-title { font-size: 17px; font-weight: 800; letter-spacing: -.3px; margin: 0; }
.head .q-updated { font-size: 11px; opacity: .85; white-space: nowrap; font-variant-numeric: tabular-nums; }
.head-row.r2 { margin-top: 3px; }
.head .q-topic { font-size: 13.5px; opacity: .97; font-weight: 600; }

/* Onglets enfants */
.tabs { position: sticky; top: 0; z-index: 20; display: flex; gap: 6px; padding: 8px 10px;
  background: #fff; border-bottom: 1px solid var(--sep); }
.tab { --accent: #2563eb; flex: 1 1 0; min-width: 0; appearance: none; border: 1.5px solid var(--sep);
  background: var(--card); color: var(--hint); font: inherit; font-weight: 700; font-size: 15px;
  padding: 9px 8px; border-radius: 12px; cursor: pointer; display: flex; align-items: center;
  justify-content: center; gap: 7px; transition: color .15s, background .15s, border-color .15s; }
.tab .label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tab .tab-dot { flex: 0 0 auto; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.tab[aria-selected="true"] { color: #fff; background: var(--accent); border-color: var(--accent); }
.tab[aria-selected="true"] .tab-dot { background: #fff; }

/* Sous-onglets matieres (scroll horizontal) */
.subtabs { position: sticky; top: var(--tabs-h, 52px); z-index: 18; display: flex; gap: 6px;
  padding: 8px 10px; background: var(--bg); border-bottom: 1px solid var(--sep);
  overflow-x: auto; scrollbar-width: none; }
.subtabs::-webkit-scrollbar { display: none; }
.subtab { --sc: var(--accent); flex: 0 0 auto; appearance: none; cursor: pointer;
  border: 1.5px solid color-mix(in srgb, var(--sc) 45%, var(--sep)); background: var(--card);
  color: color-mix(in srgb, var(--sc) 78%, var(--text)); font: inherit; font-weight: 700; font-size: 13.5px;
  padding: 7px 11px; border-radius: 999px; display: flex; align-items: center; gap: 7px; white-space: nowrap; }
.subtab[aria-selected="true"] { background: var(--sc); color: #fff; border-color: var(--sc); }
.subtab-count { font-size: 11px; font-weight: 800; background: color-mix(in srgb, #000 12%, transparent);
  border-radius: 999px; padding: 0 6px; }
.subtab[aria-selected="true"] .subtab-count { background: rgba(255,255,255,.28); }

/* Contenu */
.content { flex: 1; padding: var(--pad); padding-bottom: calc(28px + env(safe-area-inset-bottom, 0px));
  display: flex; flex-direction: column; gap: var(--gap, 12px); }
.q-score { align-self: flex-start; font-size: 13px; font-weight: 800; color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--card)); border-radius: 999px; padding: 4px 12px; }

/* Carte de question */
.q-card { background: var(--card); border-radius: var(--radius); padding: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05); }
.q-num { font-size: 12px; font-weight: 800; letter-spacing: .4px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 6px; }
.q-q { font-size: 16.5px; font-weight: 700; color: var(--text); margin-bottom: 14px; line-height: 1.35; }
.q-options { display: flex; flex-direction: column; gap: 9px; }
.q-opt { display: flex; align-items: center; gap: 11px; text-align: left; width: 100%; font: inherit;
  font-size: 15px; color: var(--text); padding: 11px 13px; border-radius: 12px; cursor: pointer;
  border: 1.5px solid var(--sep); background: var(--card); transition: border-color .15s, background .15s; }
.q-opt:hover:not(.answered) { border-color: var(--accent); }
.q-letter { flex: 0 0 auto; width: 26px; height: 26px; border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent);
  font-weight: 800; font-size: 13px; display: flex; align-items: center; justify-content: center; }
.q-opt.answered { cursor: default; }
.q-opt.correct { border-color: #16a34a; background: color-mix(in srgb, #16a34a 12%, var(--card)); }
.q-opt.correct .q-letter { background: #16a34a; color: #fff; }
.q-opt.wrong { border-color: #dc2626; background: color-mix(in srgb, #dc2626 12%, var(--card)); }
.q-opt.wrong .q-letter { background: #dc2626; color: #fff; }
.q-result { margin-top: 13px; font-weight: 700; font-size: 15px; }
.q-result.ok { color: #16a34a; }
.q-result.ko { color: #b45309; }
.q-explain { margin-top: 6px; font-size: 14px; color: var(--hint); line-height: 1.45;
  background: color-mix(in srgb, var(--accent) 7%, var(--card)); border-left: 3px solid var(--accent);
  border-radius: 8px; padding: 9px 11px; }
.q-empty { text-align: center; color: var(--hint); padding: 40px 16px; font-size: 15px; }

@media (max-width: 480px) {
  .tab { font-size: 13.5px; }
  .q-q { font-size: 15.5px; }
}
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.content > * { animation: fade .2s ease both; }
@media (prefers-reduced-motion: reduce) { .content > * { animation: none; } }