/* =========================================================
   BMI Calculator - tool-specific styles.
   Layered on /tools/_shared/tool.css.
   ========================================================= */

.bmi-widget {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.bmi-unit-toggle {
  display: inline-flex;
  align-self: center;
  gap: 4px;
  margin: 0;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-inset);
}
.bmi-unit-toggle label {
  position: relative;
  cursor: pointer;
}
.bmi-unit-toggle input {
  position: absolute;
  opacity: 0;
  inset: 0;
}
.bmi-unit-toggle span {
  display: inline-flex;
  min-width: 108px;
  justify-content: center;
  padding: 9px 14px;
  border-radius: calc(var(--radius) - 4px);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 700;
  transition: var(--transition-colors);
}
.bmi-unit-toggle input:checked + span {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.bmi-unit-toggle input:focus-visible + span {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
}

.bmi-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
.bmi-fields[hidden] {
  display: none !important;
}
@media (min-width: 560px) {
  #us-fields {
    grid-template-columns: 1fr 1fr 1.35fr;
  }
  #metric-fields {
    grid-template-columns: 1fr 1fr;
  }
}

.bmi-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.bmi-field label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}
.bmi-field input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-inset);
  color: var(--text);
  font: inherit;
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  transition: var(--transition-colors);
}
.bmi-field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.bmi-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 540px) {
  .bmi-actions {
    grid-template-columns: 2fr 1fr;
  }
}
.bmi-actions .btn {
  min-height: 52px;
}

.bmi-result {
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-inset);
  text-align: center;
  transition: var(--transition-colors);
}
.bmi-result-kicker {
  margin: 0 0 var(--space-2);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.bmi-value {
  margin: 0;
  color: var(--text);
  font-size: clamp(34px, 9vw, 72px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}
.bmi-result.is-empty .bmi-value {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.bmi-category {
  margin: var(--space-3) 0 0;
  color: var(--accent);
  font-size: 20px;
  font-weight: 800;
}
.bmi-note {
  max-width: 520px;
  margin: var(--space-3) auto 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.55;
}

.bmi-result[data-category="underweight"] .bmi-category { color: #D97706; }
.bmi-result[data-category="normal"] .bmi-category { color: var(--accent); }
.bmi-result[data-category="overweight"] .bmi-category { color: #D97706; }
.bmi-result[data-category="obesity"] .bmi-category { color: #DC2626; }