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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--tg-theme-bg-color, #ffffff);
  color: var(--tg-theme-text-color, #111111);
  padding: 16px;
}

#app { max-width: 480px; margin: 0 auto; }

.progress-card {
  background: var(--tg-theme-secondary-bg-color, #f2f2f7);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 24px;
}

.streak-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 16px;
}
.streak-flame { font-size: 28px; }
.streak-value { font-size: 32px; font-weight: 700; }
.streak-label {
  font-size: 14px;
  color: var(--tg-theme-hint-color, #8e8e93);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.stat { text-align: center; }
.stat-value { font-size: 20px; font-weight: 600; }
.stat-label {
  font-size: 12px;
  color: var(--tg-theme-hint-color, #8e8e93);
  margin-top: 2px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.due-badge {
  background: var(--tg-theme-button-color, #007aff);
  color: var(--tg-theme-button-text-color, #ffffff);
  font-size: 12px;
  font-weight: 600;
  border-radius: 10px;
  padding: 2px 8px;
  display: none;
}
.due-badge.visible { display: inline-block; }

.mistakes-list { display: flex; flex-direction: column; gap: 10px; }

.mistake-card {
  background: var(--tg-theme-secondary-bg-color, #f2f2f7);
  border-radius: 12px;
  padding: 14px;
  border-left: 3px solid transparent;
}
.mistake-card.due {
  border-left-color: var(--tg-theme-button-color, #007aff);
}

.mistake-phrase {
  font-size: 14px;
  text-decoration: line-through;
  color: var(--tg-theme-hint-color, #8e8e93);
}
.mistake-correction {
  font-size: 16px;
  font-weight: 600;
  margin: 4px 0;
}
.mistake-note {
  font-size: 13px;
  color: var(--tg-theme-hint-color, #8e8e93);
}

.loading, .empty-state {
  text-align: center;
  color: var(--tg-theme-hint-color, #8e8e93);
  padding: 24px 0;
}

.error-banner {
  background: #ff3b30;
  color: white;
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 16px;
  font-size: 14px;
}