/* ============================================
   BMI CALCULATOR
   ============================================ */
.bmi-calculator {
  max-width: 900px;
  margin: 0 auto;
}

.unit-toggle {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.unit-btn {
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.unit-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.bmi-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

/* BMI gauge */
.bmi-gauge-wrapper {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.bmi-value-display {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.bmi-category {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.bmi-gauge-track {
  height: 16px;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--info) 0%, var(--success) 25%, var(--warning) 50%, var(--danger) 75%, var(--purple) 100%);
  position: relative;
  margin-bottom: 0.5rem;
}

.bmi-gauge-needle {
  position: absolute;
  top: -4px;
  width: 6px;
  height: 24px;
  background: var(--text);
  border-radius: 3px;
  transform: translateX(-50%);
  transition: left 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 0 0 2px var(--bg);
}

.bmi-gauge-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* BMI category cards */
.bmi-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.bmi-cat-card {
  padding: 0.75rem;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  text-align: center;
  transition: var(--transition);
}

.bmi-cat-card.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.bmi-cat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bmi-cat-range {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ============================================
   BMI CALCULATOR — additions
   Append to tools.css after the existing .bmi-* rules (~line 843).
   All new classes namespaced .bmi-* to match convention.
   ============================================ */

/* Inputs hint label */
.bmi-unit-hint {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Meta row: sex + age inputs above weight/height */
.bmi-meta-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.bmi-meta-hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* Sex toggle (3 segmented buttons) */
.bmi-sex-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.bmi-sex-btn {
  min-height: 44px;
  padding: 0.55rem 0.75rem;
  background: transparent;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.bmi-sex-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.bmi-sex-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.bmi-sex-icon {
  font-size: 1.05rem;
  line-height: 1;
}

/* Contextual banner inside the gauge wrapper (children, seniors) */
.bmi-banner {
  display: flex;
  gap: 0.75rem;
  text-align: left;
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

.bmi-banner-warning {
  border-color: var(--warning);
  background: rgba(var(--warning-rgb), 0.08);
}

.bmi-banner-info {
  border-color: var(--primary);
  background: rgba(var(--primary-rgb), 0.08);
}

.bmi-banner-icon {
  font-size: 1.5rem;
  line-height: 1.2;
  flex-shrink: 0;
}

.bmi-banner-body { flex: 1; min-width: 0; }

.bmi-banner-title {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}

.bmi-banner-text {
  font-size: 0.875rem;
  color: var(--text);
  line-height: 1.5;
  margin: 0 0 0.5rem;
}

.bmi-banner-link {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  margin-top: 0.25rem;
}

.bmi-banner-link:hover { text-decoration: underline; }

/* Empty state */
.bmi-empty {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  margin: 1.5rem 0;
}

.bmi-empty-icon {
  display: block;
  font-size: 2rem;
  margin-bottom: 0.5rem;
  opacity: 0.7;
}

.bmi-empty p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Stats grid below the gauge */
.bmi-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.5rem;
  text-align: left;
}

.bmi-stat-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem 1rem;
  transition: var(--transition);
}

.bmi-stat-card.bmi-stat-good {
  border-color: var(--success);
  background: rgba(var(--success-rgb), 0.06);
}

.bmi-stat-card.bmi-stat-tip {
  grid-column: 1 / -1;
  background: var(--surface);
}

.bmi-stat-card.bmi-stat-error {
  grid-column: 1 / -1;
  border-color: var(--danger);
  background: rgba(var(--danger-rgb), 0.06);
  color: var(--danger);
  text-align: center;
  font-weight: 500;
}

.bmi-stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.bmi-stat-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.bmi-stat-text {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.55;
}

/* Action buttons row */
.bmi-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  justify-content: center;
}

.bmi-actions .btn {
  min-height: 44px;
  flex: 1 1 auto;
  min-width: 160px;
}

/* Touch-target compliance for unit buttons */
.unit-btn {
  min-height: 44px;
}

/* ----- Mobile (< 600px) ----- */
@media (max-width: 600px) {
  .bmi-meta-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .bmi-sex-options {
    grid-template-columns: repeat(3, 1fr);
  }
  .bmi-sex-btn {
    font-size: 0.85rem;
    padding: 0.5rem 0.4rem;
  }
  .bmi-inputs {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .bmi-categories {
    grid-template-columns: repeat(2, 1fr);
  }
  .bmi-stats {
    grid-template-columns: 1fr;
  }
  .bmi-value-display {
    font-size: 2.75rem;
  }
  .bmi-actions .btn {
    flex: 1 1 100%;
  }
  .bmi-banner {
    padding: 0.75rem;
  }
  .bmi-banner-icon {
    font-size: 1.25rem;
  }
}