.week-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.week-nav h2 {
  margin: 0;
  font-size: 1.25rem;
  flex: 1;
  text-align: center;
}

.week-nav-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  color: var(--color-text);
  transition: background 0.15s, color 0.15s;
}

.week-nav-btn:hover:not(:disabled) {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.week-nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.week-label {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 0.75rem;
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.125rem;
}

.longest-run {
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
  margin-bottom: 1rem;
}

.longest-run h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--color-text);
}

.threshold-value {
  color: #ef4444 !important;
}

/* Info tooltip */
.info-tip-wrapper {
  position: relative;
  display: inline-block;
  margin-left: 0.35rem;
  vertical-align: middle;
}

.info-icon {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  cursor: help;
  transition: color 0.15s;
}

.info-icon:hover {
  color: var(--color-primary);
}

.info-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  padding: 0.75rem;
  background: var(--color-text);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 400;
  line-height: 1.45;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 10;
  pointer-events: auto;
}

.info-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-text);
}

.info-tip-wrapper:hover .info-tooltip {
  display: block;
}

.info-tooltip a {
  display: inline-block;
  margin-top: 0.35rem;
  color: #93c5fd;
  text-decoration: none;
  font-weight: 600;
}

.info-tooltip a:hover {
  text-decoration: underline;
}

.recommendation {
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.recommendation h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--color-text);
}

.rec-method {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.rec-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.375rem 0;
}

.rec-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.rec-value {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-secondary);
}

.empty-message {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}