/* ==========================================================================
   ClearMedUk - Interactive Health & BMI Calculator
   ========================================================================== */

.calculator-section {
  background: linear-gradient(160deg, var(--tint-lilac) 0%, var(--bg-secondary) 55%, var(--tint-sage) 100%);
  padding: clamp(3.5rem, 5vw + 1.5rem, 6rem) 0;
}

.calc-container {
  background-color: var(--bg-card);
  border-radius: var(--radius-2xl);
  padding: clamp(1.5rem, 3vw + 0.5rem, 2.5rem);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
}

.calc-embed-wrap {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  overflow: visible;
  height: auto;
  line-height: 0;
}

.calc-embed-wrap > *:not(iframe) {
  line-height: normal;
}

.calc-embed-wrap iframe,
.calc-embed-wrap .calc-embed-iframe {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 585px !important;
  min-height: 585px !important;
  border: 0;
  border-radius: var(--radius-2xl, 1.25rem);
  background: transparent;
  vertical-align: top;
}

.calc-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.calc-tab-btn {
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.calc-tab-btn.active {
  background: var(--primary-color);
  color: var(--text-inverse);
  border-color: var(--primary-color);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: stretch;
}

.calc-inputs-card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 2.5vw, 2rem);
  border: 1px solid var(--border);
}

.calc-group { margin-bottom: 1.25rem; }

.calc-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.unit-switch {
  display: inline-flex;
  background-color: var(--bg-card);
  padding: 0.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  margin-bottom: 1rem;
}

.unit-switch button {
  padding: 0.35rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

.unit-switch button.active {
  background-color: var(--dark-bg);
  color: var(--dark-heading);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--brand-subtle);
}

/* ==========================================================================
   Calculator Results Display & BMI Gauge
   ========================================================================== */
.calc-results-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 2.5vw, 2rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-md);
}

.bmi-meter-box {
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.bmi-value-large {
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 3.5vw + 0.75rem, 2.85rem);
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1;
  margin: 0.5rem 0;
}

.bmi-category-badge {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.35rem 1.25rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.bmi-cat-normal { background: var(--tint-sage); color: var(--tint-sage-text); }
.bmi-cat-overweight { background: #FDE8D0; color: #8A4600; }
.bmi-cat-obese { background: var(--tint-rose); color: #8C1C36; }
.bmi-cat-underweight { background: var(--tint-lilac); color: var(--text-main); }

.bmi-gauge-track {
  height: 8px;
  background: linear-gradient(to right, #93C5FD 0%, #86EFAC 25%, #FDE047 50%, #FCA5A5 75%, #F43F5E 100%);
  border-radius: 4px;
  position: relative;
  margin: 1.5rem 0 0.5rem;
}

.bmi-gauge-needle {
  position: absolute;
  top: -6px;
  width: 20px;
  height: 20px;
  background: var(--dark-bg);
  border: 3px solid #FFFFFF;
  border-radius: 50%;
  transform: translateX(-50%);
  transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}

.calc-insights-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.insight-tile {
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.insight-tile span {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
}

.insight-tile strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.25rem;
}