:root {
  --bg: #0B1220;
  --frame: #0E1726;
  --panel: #111E33;
  --panel2: #0C2438;
  --line: #24344F;
  --line2: #2E4368;
  --txt: #F1F5F9;
  --mut: #94A3B8;
  --dim: #7F8EA6;
  --cyan: #38BDF8;
  --cyan2: #7DD3FC;
  --green: #63D471;
  --amber: #FBBF24;
  --red: #F87171;
  --violet: #A78BFA;
  --blue: #60A5FA;
  --mono: "Cascadia Code", Consolas, "Courier New", monospace;
  --sans: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  font-family: var(--sans);
  color: var(--txt);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 16px 8px;
}

.frame {
  width: 100%;
  max-width: 640px;
  background: var(--frame);
  border: 1px solid var(--line);
  border-radius: 14px;
  align-self: flex-start;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 32px);
  height: calc(100dvh - 32px);
  overflow: hidden;
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel);
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  border-radius: 14px 14px 0 0;
}
.dot { width: 11px; height: 11px; border-radius: 50%; flex-shrink: 0; }
.dot.red { background: #E24B4A; }
.dot.amber { background: #EF9F27; }
.dot.green { background: #63D471; }
.prompt { font-family: var(--mono); font-size: 12px; color: var(--cyan2); margin-left: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cursor { color: var(--green); animation: blink 1.2s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.online { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--green); white-space: nowrap; }

main { padding: 20px 22px; flex: 1 1 auto; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--line2) transparent; }
main::-webkit-scrollbar { width: 8px; }
main::-webkit-scrollbar-thumb { background: var(--line2); border-radius: 4px; }
main::-webkit-scrollbar-track { background: transparent; }
.loading { font-family: var(--mono); font-size: 13px; color: var(--dim); }

h1 { font-size: 19px; font-weight: 600; margin-bottom: 2px; }
.comment { font-family: var(--mono); font-size: 12px; color: var(--dim); margin-bottom: 14px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); gap: 10px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color .15s, transform .1s;
}
.card:hover { transform: translateY(-2px); }
.card.off { opacity: .5; cursor: default; }
.card.off:hover { transform: none; }
.card .chip {
  width: 34px; height: 34px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.card h3 { font-size: 14px; font-weight: 600; margin: 8px 0 2px; }
.card p { font-family: var(--mono); font-size: 11px; color: var(--dim); }
.card .count { margin-top: 6px; }

.wide {
  margin-top: 12px;
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  background: #1A1633;
  border: 1px solid #534AB7;
}
.wide .chip { width: 36px; height: 36px; border-radius: 8px; background: #26215C; display: flex; align-items: center; justify-content: center; font-size: 20px; color: #AFA9EC; }
.wide h3 { font-size: 14px; font-weight: 600; color: #CECBF6; }
.wide p { font-family: var(--mono); font-size: 11px; color: #7F77DD; margin-top: 2px; }
.wide .arrow { margin-left: auto; color: #7F77DD; font-size: 18px; }

.stats { margin-top: 12px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; font-family: var(--mono); }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.stat p { font-size: 11px; margin-bottom: 2px; }
.stat b { font-size: 20px; font-weight: 600; color: var(--txt); }

.btn {
  background: var(--frame);
  border: 1px solid var(--line2);
  border-radius: 8px;
  color: var(--txt);
  cursor: pointer;
  font-size: 14px;
  font-family: var(--sans);
  padding: 9px 16px;
  transition: border-color .15s, background .15s;
}
.btn:hover:not(:disabled) { border-color: var(--cyan); }
.btn:disabled { cursor: default; opacity: .55; }

/* Focus clavier : anneau cyan intégré au thème, visible uniquement en
   navigation clavier (:focus-visible) — jamais au clic souris. */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 8px;
}
.nav button:focus-visible {
  outline-offset: -6px;
  border-radius: 12px;
}
.card:focus-visible, .level-row:focus-visible, .wide:focus-visible {
  outline-offset: -2px;
  border-radius: 12px;
}
.term-input:focus-visible { outline: none; }
.btn.small { font-size: 13px; padding: 5px 12px; }
.btn.accent { border-color: var(--cyan); color: var(--cyan); }
.btn.full { width: 100%; text-align: left; }

.badge-pill {
  font-family: var(--mono); font-size: 11px;
  padding: 3px 10px; border-radius: 999px;
  display: inline-flex; align-items: center; gap: 5px;
}

.qhead { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; gap: 10px; }
.qmeta { font-family: var(--mono); font-size: 12px; }
.progress { height: 6px; background: var(--panel); border-radius: 3px; margin-bottom: 16px; overflow: hidden; }
.progress div { height: 100%; border-radius: 3px; transition: width .3s; }

.context {
  font-family: var(--mono); font-size: 12.5px; color: var(--mut);
  background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--line2);
  border-radius: 0 8px 8px 0; padding: 10px 14px; margin-bottom: 12px;
  white-space: pre-wrap;
}
.question { font-size: 16px; font-weight: 600; margin-bottom: 14px; line-height: 1.45; }
.btn, .question, .feedback, .context { overflow-wrap: anywhere; }

.answers { display: flex; flex-direction: column; gap: 8px; }
.answers .btn { display: flex; align-items: center; gap: 10px; }
.answers .letter {
  flex-shrink: 0; width: 24px; height: 24px; border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 12px;
}
.answers .btn.good { background: #0F2A1A; border-color: var(--green); color: var(--green); }
.answers .btn.bad { background: #2A1214; border-color: var(--red); color: var(--red); }
.answers .btn.picked { background: var(--panel2); border-color: var(--cyan); }

.pairs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.pairs .col { display: flex; flex-direction: column; gap: 8px; }
.pairs .btn { font-family: var(--mono); font-size: 12.5px; text-align: left; }
.pairs .btn.sel { border-color: var(--cyan); }
.pairs .btn.done { background: #0F2A1A; border-color: var(--green); color: var(--green); cursor: default; }
.pairs .btn.err { background: #2A1214; border-color: var(--red); }

.libre-row { display: flex; gap: 8px; }
.libre-row input {
  flex: 1; background: var(--frame); border: 1px solid var(--line2); border-radius: 8px;
  color: var(--txt); font-family: var(--mono); font-size: 14px; padding: 9px 12px; outline: none;
}
.libre-row input:focus { border-color: var(--cyan); }

.term {
  background: #05090F;
  border: 1px solid var(--line2);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 13px;
}
.term-head {
  display: flex; align-items: center; gap: 6px;
  background: var(--panel); padding: 7px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 11px; color: var(--dim);
}
.term-head .dot { width: 9px; height: 9px; }
.term-body { padding: 12px 14px; min-height: 90px; }
.term-body .line { white-space: pre-wrap; word-break: break-all; line-height: 1.55; color: #C9D5E3; }
.term-body .line.cmt { color: var(--dim); }
.term-body .line.out { color: #9FB4CC; }
.term-body .line.ok { color: var(--green); }
.term-body .line.ko { color: var(--red); }
.term-prompt { color: var(--green); }
.term-body .line:has(.term-input) { display: flex; gap: 6px; }
.term-input {
  background: none; border: none; outline: none;
  color: #E2E8F0; font-family: var(--mono); font-size: 13px;
  width: 60%; flex: 1; min-width: 0; caret-color: var(--green);
}

.feedback {
  margin-top: 14px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: 12px 14px; font-size: 13.5px; color: var(--mut); line-height: 1.5;
}
.feedback .verdict { font-family: var(--mono); font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.feedback .src { display: block; margin-top: 6px; font-family: var(--mono); font-size: 11px; color: var(--dim); }

.result { text-align: center; padding: 24px 0; }
.result .medal {
  width: 64px; height: 64px; border-radius: 16px; margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center; font-size: 34px;
}
.result .score { font-family: var(--mono); font-size: 26px; font-weight: 600; }
.result .bar { font-family: var(--mono); font-size: 15px; margin: 6px 0 8px; }
.result .note { font-size: 13.5px; color: var(--mut); margin-bottom: 20px; }
.result .actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.rank-row {
  display: flex; align-items: center; gap: 10px; padding: 7px 12px; border-radius: 8px;
  font-family: var(--mono); font-size: 12px; margin-bottom: 4px;
  background: var(--panel); border: 1px solid var(--line); color: var(--dim);
}
.rank-row.cur { background: var(--panel2); border-color: var(--cyan); color: var(--cyan2); }
.rank-row .xp { margin-left: auto; }

.badges { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; }
.badge {
  border-radius: 10px; padding: 10px 12px; text-align: center;
  background: var(--panel); border: 1px solid var(--line);
}
.badge.locked { background: var(--frame); border-style: dashed; opacity: .7; }
.badge i { font-size: 22px; }
.badge h4 { font-size: 12px; font-weight: 600; margin: 6px 0 2px; }
.badge p { font-size: 11px; color: var(--dim); }

.xpbar { height: 8px; background: var(--panel); border-radius: 4px; margin: 8px 0 18px; overflow: hidden; }
.xpbar div { height: 100%; background: var(--cyan); border-radius: 4px; }

.section-title { font-family: var(--mono); font-size: 12px; color: var(--dim); margin: 18px 0 8px; }

.level-list { display: flex; flex-direction: column; gap: 8px; }
.level-row {
  display: flex; align-items: center; gap: 12px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; cursor: pointer; transition: border-color .15s;
}
.level-row:hover:not(.locked) { border-color: var(--cyan); }
.level-row.locked { opacity: .5; cursor: default; }
.level-row .lvl {
  flex-shrink: 0; width: 34px; height: 34px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 14px; font-weight: 600;
}
.level-row h3 { font-size: 14px; font-weight: 600; }
.level-row p { font-family: var(--mono); font-size: 11px; color: var(--dim); margin-top: 2px; }
.level-row .right { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--dim); text-align: right; }

.nav {
  display: flex; border-top: 1px solid var(--line); background: var(--panel);
  flex-shrink: 0;
  border-radius: 0 0 14px 14px;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav button {
  flex: 1; background: none; border: none; color: var(--dim); cursor: pointer;
  padding: 10px 4px 12px; font-family: var(--mono); font-size: 11px;
  display: flex; flex-direction: column; align-items: center; gap: 3px; position: relative;
}
.nav button i { font-size: 20px; }
.nav button.active { color: var(--cyan); }
.pill {
  position: absolute; top: 6px; right: calc(50% - 22px);
  background: var(--red); color: #fff; font-size: 10px; font-style: normal;
  border-radius: 999px; padding: 1px 6px; min-width: 16px;
}

#toast {
  position: fixed; bottom: 100px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 8px; z-index: 50;
  width: max-content; max-width: calc(100vw - 32px);
}
.toast-item {
  background: var(--panel2); border: 1px solid var(--cyan); border-radius: 10px;
  color: var(--txt); padding: 10px 18px; font-size: 13px;
  display: flex; align-items: center; gap: 10px;
  animation: pop .25s ease-out;
  box-shadow: 0 8px 24px rgba(0,0,0,.5);
}
.toast-item i { font-size: 20px; color: var(--amber); }
@keyframes pop { from { transform: translateY(10px); opacity: 0; } }

@media (max-width: 480px) {
  main { padding: 16px 14px; }
  .pairs { grid-template-columns: 1fr; }
  .pairs .col + .col { border-top: 1px dashed var(--line2); padding-top: 10px; }
  .online { display: none; }
  .term-input, .libre-row input, main input { font-size: 16px !important; }
}