/* BMI CALCULATOR - STYLESHEET - Cyan Health Theme */
:root {
  --primary: #06b6d4;
  --primary-dark: #0891b2;
  --primary-light: #22d3ee;
  --primary-bg: #ecfeff;
  --secondary: #164e63;
  --accent: #f59e0b;
  --underweight: #3b82f6;
  --normal: #22c55e;
  --overweight: #f59e0b;
  --obese: #ef4444;
  --obese-severe: #991b1b;
  --success: #22c55e;
  --success-bg: #dcfce7;
  --warning: #f59e0b;
  --warning-bg: #fef3c7;
  --error: #ef4444;
  --error-bg: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-sans); font-size: 16px; line-height: 1.6; color: var(--gray-800); background: var(--gray-50); min-height: 100vh; display: flex; flex-direction: column; }
h1, h2, h3 { font-weight: 600; line-height: 1.3; color: var(--gray-900); }
h1 { font-size: 2.25rem; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; margin-bottom: 1rem; }
p { margin-bottom: 1rem; }
a { color: var(--primary-dark); text-decoration: none; }
a:hover { color: var(--primary); text-decoration: underline; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.content-narrow { max-width: 800px; margin: 0 auto; }
main { flex: 1; padding: 2rem 0 3rem; }

/* Header */
.header { background: var(--secondary); border-bottom: 1px solid var(--primary-dark); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.125rem; color: white; text-decoration: none; }
.logo:hover { text-decoration: none; color: var(--primary-light); }
.logo-icon { width: 32px; height: 32px; color: var(--primary-light); }
.nav-desktop { display: flex; align-items: center; gap: 1.5rem; }
.nav-desktop > a, .nav-dropdown > .nav-dropdown-toggle { font-size: 0.9375rem; font-weight: 500; color: rgba(255,255,255,0.8); padding: 0.5rem 0; border-bottom: 2px solid transparent; text-decoration: none; background: none; border: none; cursor: pointer; display: flex; align-items: center; gap: 0.25rem; }
.nav-desktop > a:hover, .nav-desktop > a.active, .nav-dropdown:hover > .nav-dropdown-toggle { color: white; text-decoration: none; border-bottom-color: var(--primary-light); }
.nav-dropdown { position: relative; }
.nav-dropdown-toggle svg { width: 14px; height: 14px; transition: transform 0.2s; }
.nav-dropdown:hover .nav-dropdown-toggle svg { transform: rotate(180deg); }
.nav-dropdown-menu { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); min-width: 240px; background: white; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 0.5rem 0; margin-top: 0.5rem; z-index: 200; }
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-menu::before { content: ''; position: absolute; top: -8px; left: 50%; transform: translateX(-50%); border: 8px solid transparent; border-bottom-color: white; }
.nav-dropdown-menu a { display: block; padding: 0.5rem 1rem; font-size: 0.875rem; font-weight: 500; color: var(--gray-700); white-space: nowrap; }
.nav-dropdown-menu a:hover { background: var(--gray-50); color: var(--primary); text-decoration: none; }
.nav-dropdown-menu a.active { color: var(--primary); background: var(--primary-bg); }
.nav-dropdown-divider { height: 1px; background: var(--gray-100); margin: 0.375rem 0; }
.nav-toggle { display: none; background: none; border: none; padding: 0.5rem; cursor: pointer; color: white; }
.nav-toggle svg { width: 24px; height: 24px; }
.nav-mobile { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--secondary); border-bottom: 1px solid var(--primary-dark); padding: 1rem; box-shadow: var(--shadow-lg); }
.nav-mobile.active { display: block; }
.nav-mobile a { display: block; padding: 0.5rem 1rem; color: rgba(255,255,255,0.9); font-weight: 500; border-radius: var(--radius-md); }
.nav-mobile .nav-mobile-section { padding: 0.25rem 1rem; font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.05em; color: rgba(255,255,255,0.4); margin-top: 0.5rem; }
@media (max-width: 768px) { .nav-desktop { display: none; } .nav-toggle { display: block; } }

/* Calculator Card */
.intro-text { font-size: 1.125rem; color: var(--gray-600); margin-bottom: 1.5rem; max-width: 700px; }
.calculator-card { background: white; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); margin-bottom: 1.5rem; overflow: hidden; max-width: 720px; margin-left: auto; margin-right: auto; }

.calc-tabs { display: flex; background: var(--secondary); border-bottom: 1px solid var(--primary-dark); overflow-x: auto; -webkit-overflow-scrolling: touch; }
.calc-tab { flex: 1; min-width: 70px; padding: 0.75rem 0.25rem; font-size: 0.6875rem; font-weight: 500; color: rgba(255,255,255,0.7); background: transparent; border: none; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 0.25rem; border-bottom: 3px solid transparent; white-space: nowrap; }
.calc-tab:hover { color: white; background: rgba(255,255,255,0.1); }
.calc-tab.active { color: white; background: rgba(6,182,212,0.3); border-bottom-color: var(--primary-light); }
.calc-tab svg { width: 18px; height: 18px; }
.calc-panel { display: none; padding: 1.25rem; }
.calc-panel.active { display: block; }

/* Form Elements */
.form-grid { display: grid; gap: 1rem; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
.form-row-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 600px) { .form-row, .form-row-3 { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; gap: 0.375rem; }
.form-label { font-size: 0.875rem; font-weight: 500; color: var(--gray-700); }
.form-hint { font-size: 0.75rem; color: var(--gray-500); }
.form-input { width: 100%; height: 44px; padding: 0 1rem; font-size: 1rem; color: var(--gray-800); background: white; border: 1px solid var(--gray-300); border-radius: var(--radius-md); }
.form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg); }
.form-select { height: 44px; padding: 0 1rem; font-size: 1rem; color: var(--gray-800); background: white; border: 1px solid var(--gray-300); border-radius: var(--radius-md); cursor: pointer; width: 100%; }

/* Unit Toggle */
.unit-toggle { display: flex; background: var(--gray-100); border-radius: var(--radius-md); padding: 4px; margin-bottom: 1rem; }
.unit-btn { flex: 1; padding: 0.5rem 1rem; font-size: 0.875rem; font-weight: 500; border: none; background: transparent; color: var(--gray-600); cursor: pointer; border-radius: var(--radius-md); transition: all 0.15s; }
.unit-btn.active { background: white; color: var(--primary-dark); box-shadow: var(--shadow-md); }

.calculate-btn { width: 100%; height: 48px; margin-top: 1rem; font-size: 1rem; font-weight: 600; color: white; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); border: none; border-radius: var(--radius-lg); cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 0.5rem; box-shadow: 0 4px 14px 0 rgba(6, 182, 212, 0.4); }
.calculate-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px 0 rgba(6, 182, 212, 0.5); }

/* Results Section */
.results-section { display: none; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--gray-200); max-width: 800px; margin-left: auto; margin-right: auto; }
.results-section.visible { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* BMI Result Card */
.bmi-result-card { text-align: center; padding: 2rem; margin-bottom: 1.5rem; border-radius: var(--radius-xl); }
.bmi-result-card.underweight { background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%); border: 2px solid var(--underweight); }
.bmi-result-card.normal { background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%); border: 2px solid var(--normal); }
.bmi-result-card.overweight { background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); border: 2px solid var(--overweight); }
.bmi-result-card.obese { background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%); border: 2px solid var(--obese); }
.bmi-result-card.obese-severe { background: linear-gradient(135deg, #fee2e2 0%, #fca5a5 100%); border: 2px solid var(--obese-severe); }

.bmi-value { font-size: 4rem; font-weight: 700; line-height: 1; margin-bottom: 0.5rem; }
.bmi-value.underweight { color: var(--underweight); }
.bmi-value.normal { color: var(--normal); }
.bmi-value.overweight { color: var(--overweight); }
.bmi-value.obese { color: var(--obese); }
.bmi-value.obese-severe { color: var(--obese-severe); }

.bmi-category { font-size: 1.5rem; font-weight: 600; margin-bottom: 0.25rem; }
.bmi-range { font-size: 0.875rem; color: var(--gray-600); }

/* BMI Scale */
.bmi-scale { margin: 1.5rem 0; }
.bmi-scale-bar { display: flex; height: 24px; border-radius: var(--radius-full); overflow: hidden; position: relative; }
.bmi-scale-segment { height: 100%; display: flex; align-items: center; justify-content: center; font-size: 0.6875rem; font-weight: 600; color: white; }
.bmi-scale-segment.underweight { background: var(--underweight); width: 18.5%; }
.bmi-scale-segment.normal { background: var(--normal); width: 25%; }
.bmi-scale-segment.overweight { background: var(--overweight); width: 16.5%; }
.bmi-scale-segment.obese { background: var(--obese); width: 20%; }
.bmi-scale-segment.obese-severe { background: var(--obese-severe); width: 20%; }
.bmi-scale-marker { position: absolute; top: -8px; width: 4px; height: 40px; background: var(--gray-900); border-radius: 2px; transform: translateX(-50%); transition: left 0.3s ease; }
.bmi-scale-labels { display: flex; justify-content: space-between; margin-top: 0.5rem; font-size: 0.6875rem; color: var(--gray-500); }

/* Results Grid */
.results-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; margin-top: 1rem; }
.results-grid-3 { grid-template-columns: repeat(3, 1fr); }
.results-grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 600px) { .results-grid, .results-grid-3, .results-grid-4 { grid-template-columns: repeat(2, 1fr); } }
.result-item { padding: 0.875rem; background: var(--gray-50); border-radius: var(--radius-md); text-align: center; }
.result-item-label { font-size: 0.6875rem; color: var(--gray-500); margin-bottom: 0.25rem; text-transform: uppercase; }
.result-item-value { font-size: 1.125rem; font-weight: 600; color: var(--gray-800); }
.result-item-value.highlight { color: var(--primary-dark); }

/* Weight Range Box */
.weight-range-box { background: var(--gray-50); border-radius: var(--radius-lg); padding: 1rem; margin: 1rem 0; }
.weight-range-title { font-size: 0.875rem; font-weight: 600; color: var(--gray-700); margin-bottom: 0.75rem; }
.weight-range-bar { display: flex; gap: 4px; margin-bottom: 0.5rem; }
.weight-range-item { flex: 1; padding: 0.5rem; border-radius: var(--radius-md); text-align: center; font-size: 0.75rem; }
.weight-range-item.current { outline: 3px solid var(--gray-900); outline-offset: 2px; }
.weight-range-item span { display: block; font-weight: 600; font-size: 0.875rem; }

/* Extended Results */
.er{margin-top:1.5rem;}
.er-section{background:white;border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:1.25rem;margin-bottom:1rem;}
.er-section h3{font-size:1rem;font-weight:700;color:var(--gray-800);margin:0 0 1rem;display:flex;align-items:center;gap:0.5rem;}
.er-section h3 .er-icon{font-size:1.125rem;}
.er-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:0.625rem;}
@media(max-width:600px){.er-metrics{grid-template-columns:repeat(2,1fr);}}
.er-metric{background:var(--gray-50);border-radius:var(--radius-md);padding:0.75rem;text-align:center;}
.er-metric-label{font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.03em;color:var(--gray-500);margin-bottom:0.25rem;}
.er-metric-value{font-size:1.125rem;font-weight:700;color:var(--gray-800);}
.er-metric-sub{font-size:0.75rem;color:var(--gray-500);margin-top:0.125rem;}
.er-table{width:100%;border-collapse:collapse;font-size:0.8125rem;margin:0.5rem 0;}
.er-table th{padding:0.5rem 0.625rem;background:var(--secondary);color:white;font-weight:600;text-align:left;border:1px solid var(--gray-300);}
.er-table td{padding:0.5rem 0.625rem;border:1px solid var(--gray-200);color:var(--gray-600);}
.er-table tr.er-active{background:var(--primary-bg);font-weight:600;}
.er-table tr.er-active td{color:var(--secondary);border-color:var(--primary-light);}
.er-table tr:nth-child(even):not(.er-active){background:var(--gray-50);}
.er-bar-wrap{height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden;margin-top:0.375rem;}
.er-bar-fill{height:100%;border-radius:4px;transition:width 0.4s ease;}
.er-risk-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0.5rem;}
@media(max-width:600px){.er-risk-grid{grid-template-columns:1fr;}}
.er-risk{display:flex;align-items:center;gap:0.5rem;padding:0.5rem 0.625rem;background:var(--gray-50);border-radius:var(--radius-md);font-size:0.8125rem;}
.er-risk-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0;}
.er-summary{background:var(--primary-bg);border:1px solid var(--primary-light);border-radius:var(--radius-lg);padding:1rem;font-size:0.875rem;color:var(--secondary);line-height:1.6;}
.er-summary strong{color:var(--primary-dark);}
.er-progress{display:flex;align-items:center;gap:0.75rem;margin:0.375rem 0;}
.er-progress-label{font-size:0.8125rem;color:var(--gray-600);min-width:80px;}
.er-progress-bar{flex:1;height:18px;background:var(--gray-100);border-radius:9px;overflow:hidden;position:relative;}
.er-progress-fill{height:100%;border-radius:9px;display:flex;align-items:center;justify-content:flex-end;padding-right:6px;font-size:0.625rem;font-weight:700;color:white;min-width:24px;}
.er-badge{display:inline-block;padding:0.125rem 0.5rem;border-radius:var(--radius-full);font-size:0.6875rem;font-weight:600;}

/* Content Sections */
.content-section { background: white; border-radius: var(--radius-xl); box-shadow: var(--shadow-md); padding: 1.5rem; margin-bottom: 1.5rem; max-width: 800px; margin-left: auto; margin-right: auto; }
.content-section h2 { margin-top: 0; }
.content-section h2::after { content: ''; display: block; width: 60px; height: 3px; background: var(--primary); margin-top: 0.5rem; border-radius: var(--radius-full); }

/* Key Takeaways Box */
.key-takeaways { background: var(--primary-bg); border: 1px solid var(--primary-light); border-radius: var(--radius-lg); padding: 1rem 1.25rem; margin-bottom: 1.5rem; max-width: 800px; margin-left: auto; margin-right: auto; }
.key-takeaways-title { font-weight: 600; color: var(--primary-dark); margin-bottom: 0.5rem; font-size: 0.9375rem; }
.key-takeaways ul { margin: 0; padding-left: 1.25rem; font-size: 0.875rem; }
.key-takeaways li { margin-bottom: 0.375rem; color: var(--gray-700); }
.key-takeaways li:last-child { margin-bottom: 0; }

/* BMI Categories Table */
.bmi-categories-table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.bmi-categories-table th, .bmi-categories-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--gray-200); }
.bmi-categories-table th { font-weight: 600; color: var(--gray-700); background: var(--gray-50); }
.bmi-categories-table td { color: var(--gray-600); }
.bmi-categories-table .category-dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; margin-right: 0.5rem; vertical-align: middle; }

/* Tables */
.table-responsive { overflow-x: auto; margin: 1rem 0; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.data-table th, .data-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--gray-200); }
.data-table th { font-weight: 600; color: var(--gray-700); background: var(--gray-50); }
.data-table td { color: var(--gray-600); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 0.75rem; }
.faq-item { border: 1px solid var(--gray-200); border-radius: var(--radius-lg); overflow: hidden; }
.faq-question { width: 100%; padding: 1rem; display: flex; align-items: center; justify-content: space-between; font-size: 0.9375rem; font-weight: 500; text-align: left; color: var(--gray-800); background: var(--gray-50); border: none; cursor: pointer; }
.faq-question:hover { background: var(--gray-100); }
.faq-question svg { width: 18px; height: 18px; color: var(--gray-400); transition: transform 0.15s ease; flex-shrink: 0; }
.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-answer { display: none; padding: 1rem; background: white; font-size: 0.9375rem; }
.faq-item.open .faq-answer { display: block; }

/* Blog Grid */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.blog-card { background: white; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; }
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.blog-card-content { padding: 1rem; }
.blog-card-meta { font-size: 0.75rem; color: var(--gray-500); margin-bottom: 0.375rem; }
.blog-card h3 { margin: 0 0 0.375rem; font-size: 1rem; }
.blog-card h3 a { color: var(--gray-900); }
.blog-card p { font-size: 0.8125rem; color: var(--gray-600); margin-bottom: 0; }

/* Tips Grid */
.tips-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; margin: 1rem 0; }
@media (max-width: 600px) { .tips-grid { grid-template-columns: 1fr; } }
.tip-item { display: flex; gap: 0.75rem; padding: 0.875rem; background: var(--gray-50); border-radius: var(--radius-md); }
.tip-icon { font-size: 1.25rem; flex-shrink: 0; }
.tip-content h4 { font-size: 0.875rem; margin: 0 0 0.25rem; color: var(--gray-800); }
.tip-content p { font-size: 0.8125rem; margin: 0; color: var(--gray-600); }

/* Footer */
.footer { background: var(--gray-900); color: var(--gray-400); padding: 2.5rem 0 1.5rem; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .logo { color: white; margin-bottom: 1rem; }
.footer-brand .logo-icon { color: var(--primary-light); }
.footer-brand p { font-size: 0.875rem; }
.footer-nav h4 { color: white; font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; margin-bottom: 1rem; }
.footer-nav ul { list-style: none; }
.footer-nav li { margin-bottom: 0.5rem; }
.footer-nav a { font-size: 0.875rem; color: var(--gray-400); }
.footer-nav a:hover { color: white; text-decoration: none; }
.footer-bottom { padding-top: 1.5rem; border-top: 1px solid var(--gray-800); font-size: 0.8125rem; text-align: center; }

/* ============================================
   CSS-ONLY CHARTS & VISUALIZATIONS
   ============================================ */

/* Horizontal Bar Charts */
.chart-bar-h { margin: 1.5rem 0; }
.chart-bar-h-item { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.chart-bar-h-label { min-width: 120px; font-size: 0.875rem; font-weight: 500; color: var(--gray-700); }
.chart-bar-h-track { flex: 1; height: 28px; background: var(--gray-100); border-radius: var(--radius-md); overflow: hidden; position: relative; }
.chart-bar-h-fill { height: 100%; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: flex-end; padding-right: 0.5rem; font-size: 0.75rem; font-weight: 600; color: white; transition: width 0.5s ease; }
.chart-bar-h-fill.underweight { background: linear-gradient(90deg, var(--underweight), #60a5fa); }
.chart-bar-h-fill.normal { background: linear-gradient(90deg, var(--normal), #4ade80); }
.chart-bar-h-fill.overweight { background: linear-gradient(90deg, var(--overweight), #fbbf24); }
.chart-bar-h-fill.obese { background: linear-gradient(90deg, var(--obese), #f87171); }
.chart-bar-h-fill.primary { background: linear-gradient(90deg, var(--primary), var(--primary-light)); }
.chart-bar-h-fill.secondary { background: linear-gradient(90deg, var(--secondary), #1e6a85); }
.chart-bar-h-value { min-width: 50px; font-size: 0.875rem; font-weight: 600; color: var(--gray-800); text-align: right; }

/* Stacked Bar Charts */
.chart-stack { margin: 1.5rem 0; }
.chart-stack-bar { display: flex; height: 40px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: inset 0 2px 4px rgba(0,0,0,0.1); }
.chart-stack-segment { display: flex; align-items: center; justify-content: center; font-size: 0.6875rem; font-weight: 600; color: white; transition: flex 0.3s ease; position: relative; overflow: hidden; }
.chart-stack-segment:hover { filter: brightness(1.1); }
.chart-stack-segment.underweight { background: var(--underweight); }
.chart-stack-segment.normal { background: var(--normal); }
.chart-stack-segment.overweight { background: var(--overweight); }
.chart-stack-segment.obese { background: var(--obese); }
.chart-stack-segment.obese-severe { background: var(--obese-severe); }
.chart-stack-segment.primary { background: var(--primary); }
.chart-stack-segment.secondary { background: var(--secondary); }
.chart-stack-segment.accent { background: var(--accent); }
.chart-stack-labels { display: flex; margin-top: 0.5rem; font-size: 0.75rem; color: var(--gray-600); }
.chart-stack-labels span { text-align: center; }

/* Side-by-Side Comparison Bars */
.chart-compare { margin: 1.5rem 0; }
.chart-compare-row { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center; margin-bottom: 1rem; padding: 1rem; background: var(--gray-50); border-radius: var(--radius-lg); }
.chart-compare-bar { height: 24px; border-radius: var(--radius-md); display: flex; align-items: center; padding: 0 0.5rem; font-size: 0.75rem; font-weight: 600; color: white; }
.chart-compare-bar.left { justify-content: flex-end; background: linear-gradient(90deg, var(--primary-light), var(--primary)); }
.chart-compare-bar.right { justify-content: flex-start; background: linear-gradient(90deg, var(--secondary), #1e6a85); }
.chart-compare-label { font-size: 0.875rem; font-weight: 600; color: var(--gray-700); text-align: center; min-width: 80px; }

/* Distribution/Bell Curve Visualization */
.chart-distribution { margin: 1.5rem 0; padding: 1rem; background: var(--gray-50); border-radius: var(--radius-lg); }
.chart-distribution-curve { display: flex; align-items: flex-end; justify-content: center; height: 120px; gap: 2px; padding: 0 1rem; }
.chart-distribution-bar { width: 12px; background: var(--primary); border-radius: 2px 2px 0 0; transition: height 0.3s ease, background 0.3s ease; }
.chart-distribution-bar.highlight { background: var(--accent); box-shadow: 0 0 8px rgba(245, 158, 11, 0.5); }
.chart-distribution-bar:hover { background: var(--primary-dark); }
.chart-distribution-labels { display: flex; justify-content: space-between; margin-top: 0.5rem; font-size: 0.75rem; color: var(--gray-500); }
.chart-distribution-marker { position: relative; text-align: center; margin-top: 0.5rem; }
.chart-distribution-marker::before { content: '▲'; color: var(--accent); font-size: 1rem; }
.chart-distribution-marker span { display: block; font-size: 0.75rem; font-weight: 600; color: var(--accent); }

/* Range Indicator */
.chart-range { margin: 1.5rem 0; }
.chart-range-track { height: 16px; background: linear-gradient(90deg, var(--underweight) 0%, var(--underweight) 18.5%, var(--normal) 18.5%, var(--normal) 43.5%, var(--overweight) 43.5%, var(--overweight) 60%, var(--obese) 60%, var(--obese) 80%, var(--obese-severe) 80%); border-radius: var(--radius-full); position: relative; }
.chart-range-marker { position: absolute; top: -6px; width: 28px; height: 28px; background: white; border: 3px solid var(--gray-800); border-radius: 50%; transform: translateX(-50%); box-shadow: var(--shadow-md); display: flex; align-items: center; justify-content: center; font-size: 0.625rem; font-weight: 700; }
.chart-range-labels { display: flex; justify-content: space-between; margin-top: 0.75rem; font-size: 0.6875rem; color: var(--gray-500); }
.chart-range-zones { display: flex; margin-top: 0.25rem; }
.chart-range-zones span { font-size: 0.6875rem; color: var(--gray-600); text-align: center; }

/* Donut Charts (CSS Conic Gradient) */
.chart-donut { display: flex; align-items: center; gap: 2rem; margin: 1.5rem 0; flex-wrap: wrap; }
.chart-donut-ring { width: 160px; height: 160px; border-radius: 50%; position: relative; display: flex; align-items: center; justify-content: center; }
.chart-donut-center { position: absolute; width: 100px; height: 100px; background: white; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; box-shadow: inset 0 2px 8px rgba(0,0,0,0.1); }
.chart-donut-value { font-size: 1.5rem; font-weight: 700; color: var(--gray-800); }
.chart-donut-label { font-size: 0.6875rem; color: var(--gray-500); text-transform: uppercase; }
.chart-donut-legend { display: flex; flex-direction: column; gap: 0.5rem; }

/* Chart Legend */
.chart-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1rem 0; }
.chart-legend-item { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8125rem; color: var(--gray-700); }
.chart-legend-dot { width: 12px; height: 12px; border-radius: 3px; flex-shrink: 0; }
.chart-legend-dot.underweight { background: var(--underweight); }
.chart-legend-dot.normal { background: var(--normal); }
.chart-legend-dot.overweight { background: var(--overweight); }
.chart-legend-dot.obese { background: var(--obese); }
.chart-legend-dot.obese-severe { background: var(--obese-severe); }
.chart-legend-dot.primary { background: var(--primary); }
.chart-legend-dot.secondary { background: var(--secondary); }
.chart-legend-dot.accent { background: var(--accent); }

/* ============================================
   ENHANCED INFO CARDS & STAT CALLOUTS
   ============================================ */

/* Info Card Grid */
.info-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.info-card { background: white; border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 1.25rem; transition: transform 0.2s, box-shadow 0.2s; }
.info-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.info-card-icon { width: 48px; height: 48px; background: var(--primary-bg); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 0.75rem; }
.info-card h4 { font-size: 1rem; font-weight: 600; color: var(--gray-800); margin: 0 0 0.5rem; }
.info-card p { font-size: 0.875rem; color: var(--gray-600); margin: 0; line-height: 1.5; }
.info-card.highlight { border-color: var(--primary); background: var(--primary-bg); }
.info-card.highlight .info-card-icon { background: white; }

/* Stat Highlight Boxes */
.stat-highlight { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 1.5rem; background: linear-gradient(135deg, var(--primary-bg) 0%, white 100%); border: 2px solid var(--primary-light); border-radius: var(--radius-xl); text-align: center; }
.stat-highlight-value { font-size: 3rem; font-weight: 700; color: var(--primary-dark); line-height: 1; }
.stat-highlight-label { font-size: 0.875rem; color: var(--gray-600); margin-top: 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-highlight-sub { font-size: 0.8125rem; color: var(--gray-500); margin-top: 0.25rem; }
.stat-highlight.warning { border-color: var(--warning); background: linear-gradient(135deg, var(--warning-bg) 0%, white 100%); }
.stat-highlight.warning .stat-highlight-value { color: var(--warning); }
.stat-highlight.success { border-color: var(--success); background: linear-gradient(135deg, var(--success-bg) 0%, white 100%); }
.stat-highlight.success .stat-highlight-value { color: var(--success); }
.stat-highlight.error { border-color: var(--error); background: linear-gradient(135deg, var(--error-bg) 0%, white 100%); }
.stat-highlight.error .stat-highlight-value { color: var(--error); }

/* Stat Grid */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.stat-box { background: var(--gray-50); border-radius: var(--radius-lg); padding: 1rem; text-align: center; }
.stat-box-value { font-size: 1.75rem; font-weight: 700; color: var(--gray-800); }
.stat-box-label { font-size: 0.75rem; color: var(--gray-500); text-transform: uppercase; margin-top: 0.25rem; }

/* ============================================
   CONTENT ENHANCEMENTS
   ============================================ */

/* Blockquotes */
blockquote, .blockquote { margin: 1.5rem 0; padding: 1rem 1.5rem; background: var(--gray-50); border-left: 4px solid var(--primary); border-radius: 0 var(--radius-md) var(--radius-md) 0; font-style: italic; color: var(--gray-700); }
blockquote cite, .blockquote cite { display: block; margin-top: 0.5rem; font-size: 0.875rem; font-style: normal; color: var(--gray-500); }
blockquote cite::before, .blockquote cite::before { content: '— '; }

/* Citation Box */
.citation-box { margin: 1.5rem 0; padding: 1rem; background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-md); font-size: 0.8125rem; }
.citation-box-title { font-weight: 600; color: var(--gray-700); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.citation-box-title::before { content: '📚'; }
.citation-box a { color: var(--primary-dark); word-break: break-all; }

/* External Link Styling */
a[target="_blank"]::after, .external-link::after { content: ' ↗'; font-size: 0.75em; opacity: 0.7; }
.external-link { color: var(--primary-dark); text-decoration: underline; text-decoration-style: dotted; text-underline-offset: 2px; }
.external-link:hover { text-decoration-style: solid; }

/* Internal Link Emphasis */
.internal-link { font-weight: 500; }

/* Medical Disclaimer */
.medical-disclaimer { margin: 2rem 0; padding: 1rem 1.25rem; background: var(--warning-bg); border: 1px solid var(--warning); border-radius: var(--radius-lg); font-size: 0.875rem; color: var(--gray-700); }
.medical-disclaimer-title { font-weight: 600; color: var(--gray-800); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.medical-disclaimer-title::before { content: '⚕️'; }

/* Author Box */
.author-box { display: flex; gap: 1rem; padding: 1.25rem; background: var(--gray-50); border-radius: var(--radius-lg); margin: 1.5rem 0; }
.author-avatar { width: 64px; height: 64px; background: var(--primary-bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex-shrink: 0; }
.author-info h4 { font-size: 0.9375rem; font-weight: 600; margin: 0 0 0.25rem; }
.author-info p { font-size: 0.8125rem; color: var(--gray-600); margin: 0; }

/* Related Articles Grid */
.related-articles { margin: 2rem 0; }
.related-articles h3 { font-size: 1.125rem; margin-bottom: 1rem; }
.related-articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.related-article-card { background: white; border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 1rem; transition: border-color 0.2s, box-shadow 0.2s; }
.related-article-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.related-article-card h4 { font-size: 0.9375rem; margin: 0 0 0.375rem; }
.related-article-card h4 a { color: var(--gray-800); }
.related-article-card h4 a:hover { color: var(--primary); text-decoration: none; }
.related-article-card p { font-size: 0.8125rem; color: var(--gray-600); margin: 0; }

/* Table of Contents */
.toc { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 1.25rem; margin: 1.5rem 0; }
.toc-title { font-size: 0.9375rem; font-weight: 600; color: var(--gray-800); margin-bottom: 0.75rem; }
.toc-list { list-style: none; padding: 0; margin: 0; }
.toc-list li { margin-bottom: 0.375rem; }
.toc-list a { font-size: 0.875rem; color: var(--gray-600); display: flex; align-items: center; gap: 0.5rem; }
.toc-list a::before { content: '→'; color: var(--primary); font-size: 0.75rem; }
.toc-list a:hover { color: var(--primary); text-decoration: none; }
.toc-list .toc-h3 { padding-left: 1rem; }
.toc-list .toc-h3 a::before { content: '–'; }

/* Comparison Table */
.comparison-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.comparison-table th { background: var(--secondary); color: white; padding: 0.875rem 1rem; font-weight: 600; text-align: left; }
.comparison-table td { padding: 0.875rem 1rem; border-bottom: 1px solid var(--gray-200); }
.comparison-table tr:nth-child(even) { background: var(--gray-50); }
.comparison-table .check { color: var(--success); font-weight: 600; }
.comparison-table .cross { color: var(--error); font-weight: 600; }

/* Progress Steps */
.progress-steps { display: flex; justify-content: space-between; margin: 1.5rem 0; position: relative; }
.progress-steps::before { content: ''; position: absolute; top: 20px; left: 0; right: 0; height: 2px; background: var(--gray-200); z-index: 0; }
.progress-step { display: flex; flex-direction: column; align-items: center; position: relative; z-index: 1; }
.progress-step-number { width: 40px; height: 40px; background: var(--gray-200); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; color: var(--gray-500); margin-bottom: 0.5rem; }
.progress-step.active .progress-step-number { background: var(--primary); color: white; }
.progress-step.completed .progress-step-number { background: var(--success); color: white; }
.progress-step-label { font-size: 0.75rem; color: var(--gray-600); text-align: center; max-width: 80px; }

/* Alert Boxes */
.alert { padding: 1rem 1.25rem; border-radius: var(--radius-lg); margin: 1rem 0; font-size: 0.9375rem; }
.alert-info { background: var(--primary-bg); border: 1px solid var(--primary-light); color: var(--secondary); }
.alert-success { background: var(--success-bg); border: 1px solid var(--success); color: #166534; }
.alert-warning { background: var(--warning-bg); border: 1px solid var(--warning); color: #92400e; }
.alert-error { background: var(--error-bg); border: 1px solid var(--error); color: #991b1b; }
.alert-title { font-weight: 600; margin-bottom: 0.25rem; }

/* Pros/Cons List */
.pros-cons { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin: 1.5rem 0; }
@media (max-width: 600px) { .pros-cons { grid-template-columns: 1fr; } }
.pros-list, .cons-list { padding: 1rem; border-radius: var(--radius-lg); }
.pros-list { background: var(--success-bg); border: 1px solid var(--success); }
.cons-list { background: var(--error-bg); border: 1px solid var(--error); }
.pros-list h4, .cons-list h4 { font-size: 0.9375rem; margin: 0 0 0.75rem; }
.pros-list h4 { color: #166534; }
.cons-list h4 { color: #991b1b; }
.pros-list ul, .cons-list ul { margin: 0; padding-left: 1.25rem; font-size: 0.875rem; }
.pros-list li { color: #166534; margin-bottom: 0.375rem; }
.cons-list li { color: #991b1b; margin-bottom: 0.375rem; }

/* Numbered Steps */
.numbered-steps { counter-reset: step; margin: 1.5rem 0; }
.numbered-step { display: flex; gap: 1rem; margin-bottom: 1.25rem; }
.numbered-step::before { counter-increment: step; content: counter(step); width: 32px; height: 32px; background: var(--primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 0.875rem; flex-shrink: 0; }
.numbered-step-content h4 { font-size: 1rem; margin: 0 0 0.25rem; }
.numbered-step-content p { font-size: 0.9375rem; color: var(--gray-600); margin: 0; }