/* Dashboard stat bubbles — spaced grid, centered column layout per tile */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
}

.stat-card .stat-icon {
  font-size: 28px;
  margin-bottom: 8px;
  line-height: 1;
}

.stat-card .stat-val {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  width: 100%;
  text-align: center;
  line-height: 1.2;
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
  width: 100%;
  text-align: center;
  line-height: 1.35;
}

/* Chapter cards on dashboard — a bit more air between tiles */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

/* Guided chapter stepper — no horizontal connector lines; space between step bubbles */
.ch-stepper {
  gap: 12px;
}

/* Ask Study Buddy — more separation, no heavy borders between messages */
.sb-ask-dlg-log {
  gap: 16px;
}

.sb-ask-msg--user,
.sb-ask-msg--ai {
  border: none;
  box-shadow: 0 1px 5px rgba(32, 33, 36, 0.08);
}

@media (max-width: 900px) {
  .stats-row {
    grid-template-columns: 1fr;
  }

  .chapters-grid {
    grid-template-columns: 1fr;
  }
}

/* Bottom nav: two-line label for “Continue learning” */
#bottom-nav .bn-item .bn-label {
  display: block;
  line-height: 1.12;
  text-align: center;
  max-width: 5.5rem;
  hyphens: auto;
}