:root {
  --bg: #f6f5f2;
  --card-bg: #ffffff;
  --ink: #1f2430;
  --muted: #6b7280;
  --accent: #2f6f4f;
  --accent-ink: #ffffff;
  --wrong: #b3413a;
  --right: #2f6f4f;
  --border: #e3e1db;
  --chip-bg: #eceae3;
  --chip-active: #2f6f4f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --card-bg: #1f2229;
    --ink: #e9e9ec;
    --muted: #9aa0aa;
    --accent: #57a37a;
    --accent-ink: #0e120f;
    --wrong: #e08079;
    --right: #57a37a;
    --border: #30343c;
    --chip-bg: #262a32;
    --chip-active: #57a37a;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
}

.topbar {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}
.topbar h1 { font-size: 1.25rem; margin: 0; }
.topbar h1 .sub { font-size: 0.85rem; color: var(--muted); font-weight: 400; display: block; }
.stats { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; }
.stat b { color: var(--ink); }

.controls {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.control-group { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.control-group label { font-size: 0.85rem; color: var(--muted); display: flex; gap: 4px; align-items: center; }
select {
  background: var(--card-bg);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 6px;
  font-size: 0.85rem;
}

.chip {
  border: 1px solid var(--border);
  background: var(--chip-bg);
  color: var(--ink);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.8rem;
  cursor: pointer;
}
.chip.active {
  background: var(--chip-active);
  color: var(--accent-ink);
  border-color: var(--chip-active);
}

.card {
  width: 100%;
  max-width: 640px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.prompt-row { display: flex; align-items: center; justify-content: space-between; }
.prompt-label { font-size: 0.8rem; color: var(--muted); }

.prompt {
  font-size: 1.6rem;
  line-height: 1.4;
  margin: 14px 0 22px;
  min-height: 2.2em;
}
.prompt[lang="es"] { direction: ltr; unicode-bidi: plaintext; text-align: start; }

.answer-area { display: flex; flex-direction: column; gap: 10px; }
.answer-area.hidden { display: none; }

.mcq-option {
  text-align: start;
  direction: ltr;
  unicode-bidi: plaintext;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  font-size: 1rem;
  cursor: pointer;
}
.mcq-option:hover { border-color: var(--accent); }
.mcq-option.correct { background: var(--right); color: #fff; border-color: var(--right); }
.mcq-option.wrong { background: var(--wrong); color: #fff; border-color: var(--wrong); }
.mcq-option[disabled] { cursor: default; }
.mcq-option:not(.correct):not(.wrong)[disabled] { opacity: 0.55; }

#typingInput {
  direction: ltr;
  text-align: start;
  font-size: 1.05rem;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
}

button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 10px;
  padding: 11px 18px;
  font-size: 1rem;
  cursor: pointer;
}
button.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--ink);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 0.8rem;
}
button.ghost.small { padding: 4px 8px; font-size: 0.95rem; }

.feedback {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.95rem;
}
.feedback.hidden { display: none; }
.feedback.ok { background: color-mix(in srgb, var(--right) 16%, transparent); border: 1px solid var(--right); }
.feedback.bad { background: color-mix(in srgb, var(--wrong) 16%, transparent); border: 1px solid var(--wrong); }
.feedback .answer { direction: ltr; unicode-bidi: plaintext; display: inline-block; font-weight: 600; }
.feedback .note { display: block; margin-top: 6px; color: var(--muted); font-size: 0.85rem; }

#nextBtn { margin-top: 16px; width: 100%; }
#nextBtn.hidden { display: none; }

#dialogueMode.hidden { display: none; }
#dialogueMode #dialogueNextBtn { margin-top: 16px; width: 100%; }
#dialogueMode #dialogueNextBtn.hidden { display: none; }

#driveMode.hidden { display: none; }

.drive-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 18px;
}
.drive-settings label { font-size: 0.85rem; color: var(--muted); display: flex; gap: 4px; align-items: center; }

.drive-display {
  text-align: center;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  margin-bottom: 18px;
}
.drive-he { font-size: 1.7rem; line-height: 1.4; }
.drive-es {
  font-size: 1.5rem;
  line-height: 1.4;
  color: var(--accent);
  font-weight: 600;
  direction: ltr;
  unicode-bidi: plaintext;
  min-height: 1.4em;
}
.drive-status { font-size: 0.95rem; color: var(--muted); min-height: 1.3em; }
.drive-status.ok { color: var(--right); }
.drive-status.bad { color: var(--wrong); }

.drive-toggle {
  display: block;
  margin: 0 auto;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 2.6rem;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0,0,0,0.18);
}
.drive-toggle.running { background: var(--wrong); color: #fff; }

.drive-hint {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 14px;
}

.dialogue-transcript {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 10px 0 18px;
  max-height: 260px;
  overflow-y: auto;
}
.bubble {
  max-width: 85%;
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 0.92rem;
  line-height: 1.4;
}
.bubble .bubble-es { direction: ltr; unicode-bidi: plaintext; display: block; }
.bubble .bubble-he { display: block; color: var(--muted); font-size: 0.82rem; margin-top: 2px; }
.bubble.advisor { align-self: flex-start; background: var(--chip-bg); border: 1px solid var(--border); }
.bubble.client { align-self: flex-end; background: color-mix(in srgb, var(--accent) 14%, transparent); border: 1px solid var(--accent); }

footer {
  max-width: 640px;
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 18px;
  text-align: center;
}