* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f7fb;
  color: #1f2937;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.topbar h1 {
  margin: 0 0 6px;
  font-size: 2rem;
}

.sub {
  margin: 0;
  color: #6b7280;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
  margin-top: 24px;
  padding: 16px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-group label {
  font-size: .95rem;
  font-weight: 700;
}

.control-group select {
  min-width: 180px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #d1d5db;
  font-size: 1rem;
}

.toggle-wrap {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-left: auto;
  font-weight: 700;
}

.card-wrap {
  margin-top: 24px;
}

.card {
  background: #fff;
  border-radius: 18px;
  padding: 28px;
  min-height: 360px;
  box-shadow: 0 2px 16px rgba(0,0,0,.08);
  perspective: 800px;
}

.mode-banner {
  display: inline-block;
  margin-bottom: 18px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1d4ed8;
  font-weight: 700;
}

.card-label {
  font-size: .9rem;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 16px;
}

.prompt {
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.25;
  font-weight: 700;
  min-height: 120px;
}

.answer-wrap {
  margin-top: 24px;
}

.answer {
  margin-top: 16px;
  padding: 16px;
  background: #eef4ff;
  border-radius: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #1d4ed8;
  white-space: pre-wrap;
}

.notes {
  margin-top: 14px;
  color: #6b7280;
}

.hidden {
  opacity: 0;
  pointer-events: none;
}

.actions,
.dictation-panel,
.speed-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
  align-items: center;
}

.speed-readout {
  display: flex;
  gap: 18px;
  font-size: 1rem;
  font-weight: 700;
  color: #374151;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn { background: #2563eb; color: #fff; }
.secondary-btn { background: #e5e7eb; color: #111827; }
.success-btn { background: #16a34a; color: #fff; }
.danger-btn { background: #dc2626; color: #fff; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.stat-box {
  background: #fff;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
}

.stat-label {
  color: #6b7280;
  font-size: .95rem;
}

.stat-value {
  margin-top: 8px;
  font-size: 1.8rem;
  font-weight: 800;
}

.help {
  margin-top: 26px;
  padding: 18px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
}

code {
  background: #eef2f7;
  padding: 2px 6px;
  border-radius: 6px;
}

.latest-chapter-bar {
  margin-top: 18px;
  margin-bottom: 18px;
  padding: 12px 16px;
  background: #eef4ff;
  border-radius: 12px;
  color: #1d4ed8;
  font-weight: 700;
}

.latest-chapter-bar p {
  margin: 0;
}

.shortcut-hints {
  width: 100%;
  margin-top: 10px;
  font-size: 12px;
  color: #777;
  text-align: center;
}

.trainer-notes {
  width: 100%;
  margin-top: 6px;
  font-size: 11px;
  color: #888;
  text-align: center;
  line-height: 1.4;
}

.answer {
  opacity: 0;
  transform: rotateX(-90deg);
  transition: opacity .25s ease, transform .25s ease;
}

.answer:not(.hidden) {
  opacity: 1;
  transform: rotateX(0);
}
@media (max-width: 800px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(140px, 1fr));
  }

  .toggle-wrap {
    margin-left: 0;
  }
}