:root {
  --bg: #eef4ff;
  --card: #ffffff;
  --ink: #1e2a3a;
  --muted: #5b6b82;
  --primary: #2f6bff;
  --primary-ink: #ffffff;
  --ok: #21a366;
  --ok-bg: #e4f7ec;
  --mid: #e08600;
  --mid-bg: #fdf0dc;
  --ko: #d5463b;
  --ko-bg: #fbe4e2;
  --line: #dfe7f5;
  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1626;
    --card: #182338;
    --ink: #eef2fb;
    --muted: #9fb0c9;
    --line: #2b3a56;
    --ok-bg: #12321f;
    --mid-bg: #33280f;
    --ko-bg: #3a1c19;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  font-size: 20px;
  line-height: 1.4;
}

.app {
  max-width: 640px;
  margin: 0 auto;
  padding: 18px 16px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.25rem;
}
.title .flag { font-size: 1.6rem; }

.badges { display: flex; gap: 8px; }
.badge {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.9rem;
  white-space: nowrap;
}
.badge b { font-size: 1.05rem; }
.badge.streak { border-color: #ffcf99; }

.historique {
  display: flex;
  gap: 6px;
  min-height: 14px;
  justify-content: center;
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--line);
  display: inline-block;
}
.dot.ok { background: var(--ok); }
.dot.mid { background: var(--mid); }
.dot.ko { background: var(--ko); }

.card {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: 0 12px 30px rgba(30, 60, 120, 0.08);
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.view {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: stretch;
}

.lead {
  font-size: 1.25rem;
  text-align: center;
  margin: 0;
}

button.big {
  font: inherit;
  font-weight: 800;
  font-size: 1.15rem;
  padding: 16px 20px;
  border-radius: 14px;
  border: 2px solid var(--line);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.06s ease, background 0.15s ease;
}
button.big:active { transform: translateY(2px); }
button.big:disabled { opacity: 0.5; cursor: default; }
button.primary {
  background: var(--primary);
  color: var(--primary-ink);
  border-color: var(--primary);
}
button.ghost {
  font: inherit;
  background: transparent;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  cursor: pointer;
  padding: 6px;
}

.ex-head { display: flex; gap: 8px; justify-content: center; }
.pill {
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.85rem;
  font-weight: 700;
}
.pill.light { background: var(--line); color: var(--muted); }

.audio-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.russe {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin: 0;
  padding: 12px;
  background: var(--bg);
  border-radius: 12px;
}
.russe.faded { opacity: 0.75; font-size: 1.15rem; font-weight: 500; }

.question {
  font-size: 1.2rem;
  text-align: center;
  margin: 0;
}

.choices { display: flex; flex-direction: column; gap: 10px; }
.choice {
  font: inherit;
  text-align: left;
  padding: 14px 16px;
  border-radius: 12px;
  border: 2px solid var(--line);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
}
.choice.sel {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, var(--card));
}

.text-input {
  font: inherit;
  font-size: 1.25rem;
  padding: 12px 14px;
  border-radius: 12px;
  border: 2px solid var(--line);
  background: var(--card);
  color: var(--ink);
  resize: vertical;
  width: 100%;
}

.mic-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.hint { color: var(--muted); font-size: 0.9rem; }
#btn-mic.rec { background: var(--ko); color: #fff; border-color: var(--ko); }

.panel {
  border-radius: 16px;
  padding: 22px 18px;
  text-align: center;
  border: 2px solid var(--line);
  animation: pop 0.25s ease;
}
.panel.ok { background: var(--ok-bg); border-color: var(--ok); }
.panel.mid { background: var(--mid-bg); border-color: var(--mid); }
.panel.ko { background: var(--ko-bg); border-color: var(--ko); }
@keyframes pop {
  from { transform: scale(0.94); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.fb-emoji { font-size: 3rem; }
.fb-text { font-size: 1.2rem; font-weight: 700; margin: 8px 0; }
.fb-correction { font-size: 1.05rem; margin: 6px 0 0; }
.fb-correction b { font-size: 1.25rem; }
.fb-level { margin: 10px 0 0; font-weight: 800; }

.spinner {
  width: 44px;
  height: 44px;
  border: 5px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.footnote {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  background: #1e2a3a;
  color: #fff;
  padding: 12px 18px;
  border-radius: 12px;
  font-size: 0.95rem;
  max-width: 90vw;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}