/* ChrysoKit . BMI Calculator . styles . 20260516a
   Rebuilt to use shared site design tokens (--surface, --text, --color-terra, etc.)
   so light/dark mode and contrast work consistently with the rest of the site. */

/* ============================================================
   Local tokens (mapped onto shared site variables)
============================================================ */
.bmi-app {
  --bmi-accent:    var(--color-terra,   #D4A373);
  --bmi-accent-2:  var(--color-terra-d, #B07A48);
  /* High-contrast display color for emphasized text: terra-dark on cream (~4.7:1) light, bright terra in dark */
  --bmi-display:   #9C5F2E;
  --bmi-sage:      var(--color-sage,    #7C9473);
  --bmi-sage-2:    var(--color-sage-d,  #5C7A52);
  --bmi-bg:        var(--surface,       #fff);
  --bmi-bg-2:      var(--surface-2,     #FAF6E8);
  --bmi-text:      var(--text,          #2A2620);
  --bmi-muted:     #5C544A;
  --bmi-border:    var(--border,        #E7DFC9);
  --bmi-border-focus: var(--color-terra, #D4A373);

  /* Hero gradient uses shared dark surface in dark, terra-warm in light */
  --bmi-hero-bg: linear-gradient(135deg, #FAF6E8 0%, #F2E9CC 100%);
  --bmi-hero-text: #2A2620;
  --bmi-hero-label: #5C544A;
  --bmi-hero-shadow: 0 4px 28px -8px rgba(212, 163, 115, 0.35);

  /* BMI category palette (works on both themes) */
  --col-under:  #4AA7D6;
  --col-normal: #4FA577;
  --col-over:   #E29A30;
  --col-obese1: #D86A3E;
  --col-obese2: #C0392B;
  --col-obese3: #8E1E1E;

  --bmi-r-sm:  8px;
  --bmi-r-md: 12px;
  --bmi-r-lg: 16px;
  --bmi-shadow-sm: 0 1px 2px rgba(20,15,5,.04), 0 6px 18px -10px rgba(20,15,5,.08);
  --bmi-trans: .2s cubic-bezier(.4,0,.2,1);
}
[data-theme="dark"] .bmi-app {
  --bmi-display:   #F0B57F;
  --bmi-bg:     #211C18;
  --bmi-bg-2:   #1A1612;
  --bmi-text:   #F4ECDB;
  --bmi-muted:  #CBC0AB;
  --bmi-border: #3A2F26;
  --bmi-border-focus: #E5A86C;

  --bmi-hero-bg: linear-gradient(135deg, #2A211B 0%, #1F1813 100%);
  --bmi-hero-text: #F4ECDB;
  --bmi-hero-label: #CBC0AB;
  --bmi-hero-shadow: 0 4px 28px -8px rgba(0, 0, 0, 0.55);

  --col-under:  #5BBDED;
  --col-normal: #6FCB95;
  --col-over:   #F0B450;
  --col-obese1: #ED8458;
  --col-obese2: #E55440;
  --col-obese3: #B33A2D;

  --bmi-shadow-sm: 0 1px 2px rgba(0,0,0,.35), 0 6px 18px -10px rgba(0,0,0,.55);
}

/* ============================================================
   Layout
============================================================ */
.bmi-app {
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
  gap: 24px;
  margin-top: 24px;
  align-items: start;
  color: var(--bmi-text);
}
@media (max-width: 1024px) {
  .bmi-app { grid-template-columns: 1fr; max-width: 720px; margin-left: auto; margin-right: auto; }
}

/* ============================================================
   Calc section
============================================================ */
.bmi-app .calc-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

/* Unit tabs */
.bmi-app .unit-tabs {
  display: flex;
  gap: 6px;
  background: var(--bmi-bg-2);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-md);
  padding: 5px;
}
.bmi-app .utab {
  flex: 1;
  padding: 9px 12px;
  background: transparent;
  border: none;
  border-radius: var(--bmi-r-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: .9rem;
  font-weight: 600;
  color: var(--bmi-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--bmi-trans), color var(--bmi-trans);
}
.bmi-app .utab svg { width: 16px; height: 16px; }
.bmi-app .utab:hover { color: var(--bmi-text); }
.bmi-app .utab.active {
  background: var(--bmi-bg);
  color: var(--bmi-display);
  box-shadow: 0 1px 3px rgba(20,15,5,.12);
}
[data-theme="dark"] .bmi-app .utab.active {
  box-shadow: 0 1px 3px rgba(0,0,0,.4);
}

/* Calc cards */
.bmi-app .calc-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 18px 20px;
  transition: border-color var(--bmi-trans), box-shadow var(--bmi-trans);
}
.bmi-app .calc-card:focus-within {
  border-color: var(--bmi-border-focus);
  box-shadow: 0 0 0 3px rgba(212, 163, 115, 0.18);
}
.bmi-app .card-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--bmi-muted);
  margin-bottom: 14px;
}
.bmi-app .label-note {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  font-size: .72rem;
  color: var(--bmi-muted);
  margin-left: 4px;
}

/* Details (collapsible) card */
.bmi-app .details-card { padding: 0; overflow: hidden; }
.bmi-app .details-card summary {
  list-style: none;
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  gap: 12px;
}
.bmi-app .details-card summary::-webkit-details-marker { display: none; }
.bmi-app .details-card .card-label.expandable { margin-bottom: 0; flex: 1; }
.bmi-app .expand-arrow {
  width: 18px;
  height: 18px;
  color: var(--bmi-muted);
  transition: transform .2s ease;
  flex: 0 0 auto;
}
.bmi-app .details-card[open] .expand-arrow { transform: rotate(180deg); }
.bmi-app .details-body { padding: 0 20px 18px; }

/* Field groups */
.bmi-app .field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.bmi-app .field-row + .field-row { margin-top: 12px; }
.bmi-app .field-row--3 { grid-template-columns: 1fr 1fr 1fr; }
.bmi-app .field-group { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.bmi-app .field-group label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--bmi-text);
}

.bmi-app .input-wrap { position: relative; }
.bmi-app .input-wrap input {
  width: 100%;
  padding: 10px 44px 10px 14px;
  background: var(--bmi-bg-2);
  border: 1.5px solid var(--bmi-border);
  border-radius: var(--bmi-r-sm);
  font-family: inherit;
  font-size: .95rem;
  font-weight: 500;
  color: var(--bmi-text);
  outline: none;
  transition: border-color var(--bmi-trans), box-shadow var(--bmi-trans);
  -moz-appearance: textfield;
}
.bmi-app .input-wrap input::-webkit-outer-spin-button,
.bmi-app .input-wrap input::-webkit-inner-spin-button { -webkit-appearance: none; }
.bmi-app .input-wrap input:focus {
  border-color: var(--bmi-border-focus);
  box-shadow: 0 0 0 3px rgba(212, 163, 115, 0.20);
}
.bmi-app .input-wrap input::placeholder { color: var(--bmi-muted); font-weight: 400; opacity: .8; }
.bmi-app .unit-badge {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: .72rem;
  font-weight: 700;
  color: var(--bmi-muted);
  pointer-events: none;
  letter-spacing: .04em;
}
.bmi-app .field-hint {
  font-size: .74rem;
  color: var(--bmi-muted);
  min-height: 1em;
}

/* Toggle group */
.bmi-app .toggle-group {
  display: flex;
  gap: 4px;
  background: var(--bmi-bg-2);
  border: 1.5px solid var(--bmi-border);
  border-radius: var(--bmi-r-sm);
  padding: 4px;
}
.bmi-app .tgl {
  flex: 1;
  padding: 8px 10px;
  background: transparent;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-family: inherit;
  font-size: .85rem;
  font-weight: 500;
  color: var(--bmi-muted);
  transition: background var(--bmi-trans), color var(--bmi-trans);
}
.bmi-app .tgl:hover { color: var(--bmi-text); }
.bmi-app .tgl.active { background: var(--bmi-accent); color: #fff; }

/* Select */
.bmi-app .select-wrap { position: relative; }
.bmi-app .select-wrap::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--bmi-muted);
  border-bottom: 2px solid var(--bmi-muted);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}
.bmi-app .select-wrap select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  padding: 10px 36px 10px 14px;
  background: var(--bmi-bg-2);
  border: 1.5px solid var(--bmi-border);
  border-radius: var(--bmi-r-sm);
  font-family: inherit;
  font-size: .9rem;
  color: var(--bmi-text);
  outline: none;
  cursor: pointer;
  transition: border-color var(--bmi-trans), box-shadow var(--bmi-trans);
}
.bmi-app .select-wrap select:focus {
  border-color: var(--bmi-border-focus);
  box-shadow: 0 0 0 3px rgba(212, 163, 115, 0.20);
}

/* Calculate button */
.bmi-app .calc-btn {
  width: 100%;
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.bmi-app .calc-btn .btn-icon { width: 18px; height: 18px; transition: transform var(--bmi-trans); }
.bmi-app .calc-btn:hover .btn-icon { transform: translateX(3px); }

/* ============================================================
   Results section
============================================================ */
.bmi-app .results-section { min-width: 0; }
.bmi-app .results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  gap: 16px;
  background: var(--bmi-bg);
  border: 2px dashed var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  color: var(--bmi-muted);
  text-align: center;
  line-height: 1.7;
  padding: 24px;
}
.bmi-app .placeholder-icon {
  width: 56px;
  height: 56px;
  opacity: .35;
  color: var(--bmi-accent);
}
.bmi-app .hidden { display: none !important; }
.bmi-app .results-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: bmiSlideUp .35s cubic-bezier(.4,0,.2,1);
}
@keyframes bmiSlideUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* Hero card */
.bmi-app .result-hero-card {
  background: var(--bmi-hero-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--bmi-hero-shadow);
}
.bmi-app .result-hero-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 85% 50%, rgba(212, 163, 115, 0.14) 0%, transparent 65%);
  pointer-events: none;
}
.bmi-app .rh-left { flex: 1; min-width: 0; position: relative; z-index: 1; }
.bmi-app .rh-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--bmi-hero-label);
  margin-bottom: 6px;
}
.bmi-app .rh-value {
  font-size: clamp(2.6rem, 5.5vw, 4rem);
  line-height: 1;
  font-weight: 800;
  color: var(--bmi-hero-text);
  margin-bottom: 6px;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.bmi-app .rh-category {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--bmi-display);
  margin-bottom: 4px;
}
.bmi-app .rh-detail {
  font-size: .88rem;
  color: var(--bmi-hero-label);
}
.bmi-app .rh-right {
  flex-shrink: 0;
  width: 180px;
  position: relative;
  z-index: 1;
}
@media (max-width: 640px) {
  .bmi-app .result-hero-card { flex-direction: column; align-items: flex-start; }
  .bmi-app .rh-right { width: 100%; max-width: 220px; align-self: center; }
}

/* Gauge */
.bmi-app .gauge-svg { width: 100%; height: auto; display: block; overflow: visible; }
.bmi-app .gauge-seg {
  fill: none;
  opacity: .45;
  stroke-width: 18;
  transition: opacity .3s ease;
}
.bmi-app .gauge-seg.seg-under  { stroke: var(--col-under); }
.bmi-app .gauge-seg.seg-normal { stroke: var(--col-normal); }
.bmi-app .gauge-seg.seg-over   { stroke: var(--col-over); }
.bmi-app .gauge-seg.seg-obese1 { stroke: var(--col-obese1); }
.bmi-app .gauge-needle {
  stroke: var(--bmi-display);
  stroke-width: 5;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.25));
  transition: x2 .5s ease, y2 .5s ease;
}
.bmi-app .gauge-pivot {
  fill: var(--bmi-display);
  stroke: var(--bmi-bg);
  stroke-width: 2;
}
.bmi-app .gauge-labels {
  display: flex;
  justify-content: space-between;
  font-size: .7rem;
  color: var(--bmi-text);
  padding: 0 6px;
  margin-top: 4px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Scale bar */
.bmi-app .scale-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-md);
  padding: 16px 20px;
}
.bmi-app .scale-label-row {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
}
.bmi-app .sl {
  flex: 1;
  text-align: center;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.bmi-app .sl.under  { color: var(--col-under); flex: 0.8; }
.bmi-app .sl.normal { color: var(--col-normal); flex: 1.2; }
.bmi-app .sl.over   { color: var(--col-over); }
.bmi-app .sl.obese1 { color: var(--col-obese1); }
.bmi-app .sl.obese2 { color: var(--col-obese2); }

.bmi-app .scale-track {
  display: flex;
  height: 14px;
  border-radius: 7px;
  overflow: visible;
  position: relative;
  margin-bottom: 8px;
  box-shadow: inset 0 1px 2px rgba(0,0,0,.10);
}
.bmi-app .scale-seg { height: 100%; }
.bmi-app .under-seg  { background: var(--col-under);  border-radius: 7px 0 0 7px; }
.bmi-app .normal-seg { background: var(--col-normal); }
.bmi-app .over-seg   { background: var(--col-over); }
.bmi-app .obese1-seg { background: var(--col-obese1); }
.bmi-app .obese2-seg { background: var(--col-obese2); border-radius: 0 7px 7px 0; }

/* Scale thumb (BMI position indicator)
   Uses theme-independent colors so it contrasts with any segment color (blue/green/orange/red). */
.bmi-app .scale-thumb {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 26px;
  height: 26px;
  background: #FFFFFF;
  border: 4px solid #1A1612;
  border-radius: 50%;
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.32),
    0 0 0 2px rgba(255, 255, 255, 0.45);
  transition: left .5s cubic-bezier(.4,0,.2,1);
  z-index: 3;
}
[data-theme="dark"] .bmi-app .scale-thumb {
  background: #FFFFFF;
  border-color: #0E0B08;
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.55),
    0 0 0 2px rgba(255, 255, 255, 0.25);
}
.bmi-app .scale-num-row {
  display: flex;
  justify-content: space-between;
  font-size: .7rem;
  color: var(--bmi-muted);
  font-variant-numeric: tabular-nums;
}

/* Metrics grid */
.bmi-app .metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.bmi-app .metrics-grid--2 { grid-template-columns: 1fr 1fr; }
.bmi-app .metric-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color var(--bmi-trans), transform var(--bmi-trans);
}
.bmi-app .metric-card:hover {
  border-color: var(--bmi-border-focus);
  transform: translateY(-1px);
}
.bmi-app .mc-icon {
  width: 22px;
  height: 22px;
  color: var(--bmi-accent);
  margin-bottom: 4px;
}
.bmi-app .mc-label {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--bmi-muted);
}
.bmi-app .mc-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--bmi-text);
  font-variant-numeric: tabular-nums;
}
.bmi-app .mc-sub { font-size: .72rem; color: var(--bmi-muted); }

/* Calorie card */
.bmi-app .calorie-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 18px 20px;
}
.bmi-app .calorie-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.bmi-app .cal-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 14px;
  background: var(--bmi-bg-2);
  border-radius: var(--bmi-r-md);
  border: 1px solid var(--bmi-border);
}
.bmi-app .cal-item--goal {
  background: rgba(212, 163, 115, 0.12);
  border-color: rgba(212, 163, 115, 0.35);
}
[data-theme="dark"] .bmi-app .cal-item--goal {
  background: rgba(229, 168, 108, 0.14);
  border-color: rgba(229, 168, 108, 0.35);
}
.bmi-app .cal-label {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--bmi-muted);
}
.bmi-app .cal-value {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--bmi-text);
  font-variant-numeric: tabular-nums;
}
.bmi-app .cal-item--goal .cal-value { color: var(--bmi-display); }
.bmi-app .cal-note { font-size: .7rem; color: var(--bmi-muted); }

/* Body fat card */
.bmi-app .bodyfat-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 18px 20px;
}

/* Alt indices */
.bmi-app .alt-indices-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 18px 20px;
}
.bmi-app .alt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.bmi-app .alt-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 14px;
  background: var(--bmi-bg-2);
  border-radius: var(--bmi-r-sm);
  border: 1px solid var(--bmi-border);
}
.bmi-app .alt-name { font-size: .7rem; font-weight: 600; color: var(--bmi-muted); text-transform: uppercase; letter-spacing: .04em; }
.bmi-app .alt-val  { font-size: 1.15rem; font-weight: 700; color: var(--bmi-text); font-variant-numeric: tabular-nums; }
.bmi-app .alt-unit { font-size: .68rem; color: var(--bmi-muted); }

/* Health risk */
.bmi-app .health-risk-card {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 18px 20px;
}
.bmi-app .risk-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}
.bmi-app .risk-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--bmi-r-sm);
  border: 1px solid var(--bmi-border);
  background: var(--bmi-bg-2);
}
.bmi-app .risk-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.bmi-app .risk-dot.green  { background: var(--col-normal); box-shadow: 0 0 0 3px rgba(79,165,119,.18); }
.bmi-app .risk-dot.yellow { background: var(--col-over);   box-shadow: 0 0 0 3px rgba(226,154,48,.18); }
.bmi-app .risk-dot.orange { background: var(--col-obese1); box-shadow: 0 0 0 3px rgba(216,106,62,.18); }
.bmi-app .risk-dot.red    { background: var(--col-obese2); box-shadow: 0 0 0 3px rgba(192,57,43,.18); }
.bmi-app .risk-dot.blue   { background: var(--col-under);  box-shadow: 0 0 0 3px rgba(74,167,214,.18); }
.bmi-app .risk-name  { flex: 1; font-size: .9rem; font-weight: 500; color: var(--bmi-text); }
.bmi-app .risk-level {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-left: auto;
}
.bmi-app .risk-level.normal    { color: var(--col-normal); }
.bmi-app .risk-level.low       { color: var(--col-under); }
.bmi-app .risk-level.moderate  { color: var(--col-over); }
.bmi-app .risk-level.high      { color: var(--col-obese1); }
.bmi-app .risk-level.very-high { color: var(--col-obese2); }

/* Export bar */
.bmi-app .export-bar {
  background: var(--bmi-bg);
  border: 1px solid var(--bmi-border);
  border-radius: var(--bmi-r-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.bmi-app .export-label {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--bmi-muted);
  white-space: nowrap;
}
.bmi-app .export-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.bmi-app .export-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--bmi-bg-2);
  border: 1.5px solid var(--bmi-border);
  border-radius: var(--bmi-r-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: .82rem;
  font-weight: 600;
  color: var(--bmi-text);
  transition: background var(--bmi-trans), border-color var(--bmi-trans), transform var(--bmi-trans);
}
.bmi-app .export-btn svg { width: 15px; height: 15px; }
.bmi-app .export-btn:hover {
  background: var(--bmi-bg);
  border-color: var(--bmi-border-focus);
  transform: translateY(-1px);
}
.bmi-app .export-btn:active { transform: translateY(0); }

/* ============================================================
   About / methodology
   Uses concrete colors with explicit dark overrides instead of
   trusting global var fallbacks, so contrast is guaranteed.
============================================================ */
.about-section {
  margin-top: 36px;
  padding: 28px 0 8px;
  border-top: 1px solid #E7DFC9;
  color: #2A2620;
}
.about-section h2 {
  font-size: 1.35rem;
  margin: 0 0 18px;
  color: #2A2620;
}
.about-section h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: #2A2620;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; gap: 28px; } }

/* Reference table */
.ref-table-wrap { overflow-x: auto; }
.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  color: #2A2620;
}
.ref-table th {
  padding: 10px 12px;
  text-align: left;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #5C544A;
  border-bottom: 1px solid #E7DFC9;
  background: #FAF6E8;
}
.ref-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #E7DFC9;
  color: #2A2620;
}
.ref-table tr:last-child td { border-bottom: none; }
.row-under  td:first-child { border-left: 3px solid #4AA7D6; }
.row-normal td:first-child { border-left: 3px solid #4FA577; }
.row-over   td:first-child { border-left: 3px solid #E29A30; }
.row-obese1 td:first-child { border-left: 3px solid #D86A3E; }
.row-obese2 td:first-child { border-left: 3px solid #D86A3E; }
.row-obese3 td:first-child { border-left: 3px solid #C0392B; }

/* Formula list */
.formula-list { font-size: .9rem; color: #2A2620; margin: 0; }
.formula-list dt {
  font-weight: 700;
  color: #5C544A;
  margin-top: 14px;
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.formula-list dt:first-child { margin-top: 0; }
.formula-list dd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: .85rem;
  color: #2A2620;
  background: #FAF6E8;
  padding: 10px 14px;
  border-radius: 6px;
  margin: 6px 0 0;
  border-left: 3px solid #B07A48;
  word-break: break-word;
}

/* Disclaimer */
.disclaimer {
  margin-top: 20px;
  padding: 14px 16px;
  background: rgba(212, 163, 115, 0.10);
  border: 1px solid rgba(212, 163, 115, 0.32);
  border-radius: 8px;
  font-size: .9rem;
  color: #2A2620;
  line-height: 1.55;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.disclaimer svg { width: 18px; height: 18px; color: #B07A48; flex: 0 0 auto; margin-top: 2px; }

/* Dark-mode overrides — concrete, do not depend on global vars being present */
[data-theme="dark"] .about-section          { border-top-color: #3A2F26; color: #F4ECDB; }
[data-theme="dark"] .about-section h2,
[data-theme="dark"] .about-section h3       { color: #F4ECDB; }
[data-theme="dark"] .ref-table              { color: #F4ECDB; }
[data-theme="dark"] .ref-table th           { color: #CBC0AB; background: #1A1612; border-bottom-color: #3A2F26; }
[data-theme="dark"] .ref-table td           { color: #F4ECDB; border-bottom-color: #3A2F26; }
[data-theme="dark"] .formula-list           { color: #F4ECDB; }
[data-theme="dark"] .formula-list dt        { color: #CBC0AB; }
[data-theme="dark"] .formula-list dd        { color: #F4ECDB; background: #1A1612; border-left-color: #E5A86C; }
[data-theme="dark"] .disclaimer             { background: rgba(229, 168, 108, 0.12); border-color: rgba(229, 168, 108, 0.35); color: #F4ECDB; }
[data-theme="dark"] .disclaimer svg         { color: #F0B57F; }

/* ============================================================
   Responsive
============================================================ */
@media (max-width: 1024px) {
  .bmi-app .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .bmi-app .calorie-grid { grid-template-columns: repeat(2, 1fr); }
  .bmi-app .alt-grid     { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .bmi-app .field-row { grid-template-columns: 1fr; }
  .bmi-app .field-row--3 { grid-template-columns: 1fr 1fr; }
  .bmi-app .metrics-grid { grid-template-columns: 1fr 1fr; }
  .bmi-app .calorie-grid { grid-template-columns: 1fr 1fr; }
  .bmi-app .alt-grid     { grid-template-columns: 1fr 1fr; }
  .bmi-app .export-bar   { flex-direction: column; align-items: stretch; }
  .bmi-app .export-btns  { justify-content: center; }
}

/* Print */
@media print {
  .site-header, .site-footer, .export-bar, .calc-section,
  .breadcrumb, .nav-toggle, .ad-zone, .related-post { display: none !important; }
  .bmi-app { grid-template-columns: 1fr; }
}