/* ========================================
   BMI Calculator NHS - Main Stylesheet
   bmicalculatornhs.co.uk
   ======================================== */

/* CSS Variables */
:root {
  --nhs-blue: #005eb8;
  --nhs-dark-blue: #003f82;
  --nhs-light-blue: #d4e4f7;
  --nhs-pale-blue: #eaf4fb;
  --nhs-green: #007f3b;
  --nhs-warm-yellow: #ffb81c;
  --nhs-red: #da291c;
  --nhs-orange: #fa8c00;
  --white: #ffffff;
  --light-grey: #f0f4f5;
  --mid-grey: #d8dde0;
  --dark-grey: #425563;
  --text-primary: #212b32;
  --text-secondary: #4c6272;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
  --transition: all 0.25s ease;
  --font-main: 'Frutiger', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-main); color: var(--text-primary); background: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--nhs-blue); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--nhs-dark-blue); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ========================================
   SKIP LINK (Accessibility)
   ======================================== */
.skip-link {
  position: absolute; top: -100px; left: 0; padding: 8px 16px;
  background: var(--nhs-blue); color: #fff; z-index: 9999;
  border-radius: 0 0 var(--border-radius) 0;
}
.skip-link:focus { top: 0; }

/* ========================================
   NHS TOP BAR
   ======================================== */
.nhs-top-bar {
  background: var(--nhs-blue);
  padding: 6px 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.85);
}
.nhs-top-bar .container {
  display: flex; justify-content: space-between; align-items: center;
}
.nhs-top-bar a { color: rgba(255,255,255,0.9); font-size: 0.8rem; }
.nhs-top-bar a:hover { color: #fff; }

/* ========================================
   HEADER
   ======================================== */
.site-header {
  background: var(--white);
  border-bottom: 3px solid var(--nhs-blue);
  position: sticky; top: 0; z-index: 1000;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 20px; max-width: var(--max-width); margin: 0 auto;
}
.logo-wrap { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-icon {
  width: 48px; height: 48px;
  background: var(--nhs-blue);
  border-radius: var(--border-radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.logo-icon svg { width: 30px; height: 30px; }
.logo-text { display: flex; flex-direction: column; }
.logo-text .logo-title {
  font-size: 1.15rem; font-weight: 700;
  color: var(--nhs-blue); line-height: 1.2;
  letter-spacing: -0.3px;
}
.logo-text .logo-sub {
  font-size: 0.72rem; color: var(--text-secondary);
  font-weight: 400; letter-spacing: 0.5px; text-transform: uppercase;
}

/* NAV */
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  padding: 8px 14px; border-radius: 6px;
  font-size: 0.88rem; font-weight: 500;
  color: var(--text-primary); transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { background: var(--nhs-pale-blue); color: var(--nhs-blue); text-decoration: none; }
.nav-links a.active { background: var(--nhs-blue); color: #fff; }

/* Hamburger */
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; border-radius: 6px; cursor: pointer;
  transition: var(--transition);
}
.menu-toggle:hover { background: var(--nhs-pale-blue); }
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile nav */
.mobile-nav {
  display: none; background: var(--white);
  border-top: 1px solid var(--mid-grey);
  padding: 12px 0; max-height: 0; overflow: hidden;
  transition: max-height 0.3s ease;
}
.mobile-nav.open { display: block; max-height: 500px; }
.mobile-nav a {
  display: block; padding: 11px 20px;
  font-size: 0.95rem; font-weight: 500; color: var(--text-primary);
  border-bottom: 1px solid var(--light-grey);
  transition: var(--transition);
}
.mobile-nav a:hover { background: var(--nhs-pale-blue); color: var(--nhs-blue); text-decoration: none; }
.mobile-nav a:last-child { border-bottom: none; }

/* ========================================
   CONTAINER
   ======================================== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  background: linear-gradient(135deg, var(--nhs-blue) 0%, var(--nhs-dark-blue) 60%, #001f55 100%);
  color: #fff; padding: 60px 0 70px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -10%;
  width: 600px; height: 600px; border-radius: 50%;
  background: rgba(255,255,255,0.03); pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -30%; left: -5%;
  width: 400px; height: 400px; border-radius: 50%;
  background: rgba(255,255,255,0.04); pointer-events: none;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 14px; border-radius: 20px; font-size: 0.8rem;
  font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase;
  margin-bottom: 20px; backdrop-filter: blur(4px);
}
.hero-badge-dot { width: 8px; height: 8px; background: #4ade80; border-radius: 50%; animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.6;transform:scale(1.3)} }
.hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700; line-height: 1.2; margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.hero h1 em { font-style: normal; color: #93c5fd; }
.hero-desc { font-size: 1.05rem; opacity: 0.9; margin-bottom: 28px; max-width: 480px; line-height: 1.7; }
.hero-stats {
  display: flex; gap: 24px; margin-top: 8px;
}
.hero-stat { text-align: center; }
.hero-stat .stat-num { font-size: 1.5rem; font-weight: 700; line-height: 1; }
.hero-stat .stat-label { font-size: 0.75rem; opacity: 0.7; margin-top: 2px; }

/* Quick BMI preview on hero right */
.hero-visual {
  display: flex; justify-content: center; align-items: center;
}
.hero-tool-preview {
  background: rgba(255,255,255,0.1); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--border-radius-lg); padding: 24px;
  width: 100%; max-width: 340px;
}
.hero-tool-preview h3 { font-size: 1rem; margin-bottom: 16px; opacity: 0.9; }
.quick-calc-row { display: flex; gap: 10px; margin-bottom: 12px; }
.quick-calc-input {
  flex: 1; padding: 10px 12px; border-radius: 6px;
  border: 1.5px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.15); color: #fff;
  font-size: 0.9rem; outline: none;
  transition: var(--transition);
}
.quick-calc-input::placeholder { color: rgba(255,255,255,0.6); }
.quick-calc-input:focus { border-color: rgba(255,255,255,0.7); background: rgba(255,255,255,0.2); }
.quick-calc-input option { color: var(--text-primary); background: #fff; }
.btn-quick-calc {
  width: 100%; padding: 12px; border-radius: 6px;
  background: #fff; color: var(--nhs-blue);
  font-size: 0.95rem; font-weight: 700;
  transition: var(--transition); margin-top: 4px;
  border: 2px solid transparent;
}
.btn-quick-calc:hover { background: var(--nhs-pale-blue); transform: translateY(-1px); }
.hero-preview-result {
  margin-top: 14px; padding: 12px; border-radius: 6px;
  background: rgba(255,255,255,0.1); text-align: center;
  font-size: 0.85rem; display: none;
}
.hero-preview-result.show { display: block; }

/* ========================================
   BREADCRUMB
   ======================================== */
.breadcrumb {
  background: var(--nhs-pale-blue);
  border-bottom: 1px solid var(--nhs-light-blue);
  padding: 10px 0;
}
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.breadcrumb li { font-size: 0.82rem; color: var(--text-secondary); }
.breadcrumb li + li::before { content: '›'; margin-right: 8px; color: var(--mid-grey); }
.breadcrumb a { color: var(--nhs-blue); }

/* ========================================
   TRUST BAR
   ======================================== */
.trust-bar {
  background: var(--light-grey);
  border-bottom: 1px solid var(--mid-grey);
  padding: 14px 0;
}
.trust-items {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 24px; align-items: center;
}
.trust-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; color: var(--text-secondary); font-weight: 500;
}
.trust-item svg { color: var(--nhs-blue); flex-shrink: 0; }

/* ========================================
   SECTION STYLES
   ======================================== */
.section { padding: 64px 0; }
.section-sm { padding: 40px 0; }
.section-alt { background: var(--light-grey); }
.section-blue { background: var(--nhs-pale-blue); }

.section-header { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-tag {
  display: inline-block; background: var(--nhs-light-blue); color: var(--nhs-blue);
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.8px;
  text-transform: uppercase; padding: 5px 14px; border-radius: 20px; margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700; color: var(--text-primary); margin-bottom: 12px;
  line-height: 1.25; letter-spacing: -0.3px;
}
.section-header p { font-size: 1rem; color: var(--text-secondary); line-height: 1.7; }

/* ========================================
   BMI CALCULATOR - MAIN TOOL
   ======================================== */
.calculator-section { background: var(--white); padding: 64px 0; }
.calculator-wrapper {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 40px; align-items: start;
}
.calc-form-panel {
  background: var(--white); border-radius: var(--border-radius-lg);
  border: 1px solid var(--mid-grey); overflow: hidden;
  box-shadow: var(--shadow-md);
}
.calc-panel-header {
  background: var(--nhs-blue); color: #fff;
  padding: 20px 28px; display: flex; align-items: center; gap: 14px;
}
.calc-panel-header svg { opacity: 0.9; }
.calc-panel-header h2 { font-size: 1.15rem; font-weight: 700; }
.calc-panel-header p { font-size: 0.82rem; opacity: 0.8; margin-top: 2px; }
.calc-form-body { padding: 28px; }

/* Unit Toggle */
.unit-toggle {
  display: flex; background: var(--light-grey);
  border-radius: 8px; padding: 4px; margin-bottom: 24px; gap: 4px;
}
.unit-btn {
  flex: 1; padding: 9px 16px; border-radius: 6px;
  font-size: 0.88rem; font-weight: 600; color: var(--text-secondary);
  transition: var(--transition); text-align: center;
}
.unit-btn.active {
  background: var(--nhs-blue); color: #fff;
  box-shadow: var(--shadow-sm);
}

/* Form Groups */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-row.single { grid-template-columns: 1fr; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group:last-child { margin-bottom: 0; }
.form-label {
  font-size: 0.88rem; font-weight: 600; color: var(--text-primary);
  display: flex; align-items: center; gap: 6px;
}
.form-label .label-hint {
  font-size: 0.75rem; font-weight: 400; color: var(--text-secondary);
}
.input-wrap { position: relative; display: flex; }
.form-input, .form-select {
  width: 100%; padding: 12px 48px 12px 14px;
  border: 1.5px solid var(--mid-grey); border-radius: var(--border-radius);
  font-size: 0.95rem; color: var(--text-primary);
  background: var(--white); outline: none;
  transition: var(--transition); -webkit-appearance: none;
}
.form-input:focus, .form-select:focus {
  border-color: var(--nhs-blue);
  box-shadow: 0 0 0 3px rgba(0,94,184,0.12);
}
.form-input.error { border-color: var(--nhs-red); }
.input-unit {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font-size: 0.8rem; font-weight: 600; color: var(--text-secondary);
  pointer-events: none; white-space: nowrap;
}
.height-imperial { display: none; }
.height-imperial .input-wrap:first-child { margin-right: 8px; }

/* Gender Select */
.gender-group { display: flex; gap: 10px; }
.gender-btn {
  flex: 1; padding: 11px 8px; border-radius: var(--border-radius);
  border: 1.5px solid var(--mid-grey); font-size: 0.88rem; font-weight: 600;
  color: var(--text-secondary); transition: var(--transition); text-align: center;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.gender-btn:hover { border-color: var(--nhs-blue); color: var(--nhs-blue); }
.gender-btn.selected { border-color: var(--nhs-blue); background: var(--nhs-pale-blue); color: var(--nhs-blue); }

/* Error messages */
.field-error { font-size: 0.78rem; color: var(--nhs-red); display: none; margin-top: 3px; }
.field-error.show { display: block; }

/* Calculate Button */
.btn-calculate {
  width: 100%; padding: 15px;
  background: var(--nhs-blue); color: #fff;
  border-radius: var(--border-radius); font-size: 1rem; font-weight: 700;
  transition: var(--transition); margin-top: 8px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  letter-spacing: 0.2px;
}
.btn-calculate:hover { background: var(--nhs-dark-blue); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-calculate:active { transform: translateY(0); }
.btn-calculate svg { transition: transform 0.2s; }
.btn-calculate:hover svg { transform: translateX(3px); }

.btn-reset {
  width: 100%; padding: 10px;
  background: transparent; color: var(--text-secondary);
  border: 1.5px solid var(--mid-grey); border-radius: var(--border-radius);
  font-size: 0.88rem; font-weight: 600;
  transition: var(--transition); margin-top: 8px;
}
.btn-reset:hover { border-color: var(--nhs-blue); color: var(--nhs-blue); background: var(--nhs-pale-blue); }

/* ========================================
   BMI RESULT PANEL
   ======================================== */
.calc-result-panel {
  background: var(--white); border-radius: var(--border-radius-lg);
  border: 1px solid var(--mid-grey); overflow: hidden;
  box-shadow: var(--shadow-md); min-height: 520px;
  display: flex; flex-direction: column;
}
.result-placeholder {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 40px 28px; text-align: center; color: var(--text-secondary);
}
.result-placeholder svg { color: var(--mid-grey); margin-bottom: 16px; }
.result-placeholder h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--dark-grey); }
.result-placeholder p { font-size: 0.88rem; max-width: 220px; }

/* Result Display */
.result-display { display: none; flex-direction: column; height: 100%; }
.result-display.show { display: flex; }
.result-header { padding: 20px 24px; text-align: center; }
.result-score-wrap {
  display: flex; flex-direction: column; align-items: center; margin-bottom: 10px;
}
.result-score-label { font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.result-score {
  font-size: 4.5rem; font-weight: 800; line-height: 1;
  background: linear-gradient(135deg, var(--nhs-blue), #0070d2);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.result-category-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 18px; border-radius: 20px; font-size: 0.88rem; font-weight: 700;
  margin-top: 6px; letter-spacing: 0.3px;
}
.badge-underweight { background: #dbeafe; color: #1d4ed8; }
.badge-normal { background: #dcfce7; color: #15803d; }
.badge-overweight { background: #fef9c3; color: #a16207; }
.badge-obese { background: #fee2e2; color: #dc2626; }
.badge-severely-obese { background: #fce7f3; color: #be185d; }

/* BMI Scale Bar */
.bmi-scale-wrap { padding: 0 24px 16px; }
.scale-label { font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.bmi-scale-bar {
  position: relative; height: 10px; border-radius: 5px; overflow: visible;
  background: linear-gradient(to right, #60a5fa 0%, #4ade80 18.5%, #4ade80 25%, #fbbf24 25%, #fbbf24 30%, #f87171 30%, #f87171 40%, #e879f9 40%);
  margin-bottom: 20px;
}
.scale-pointer {
  position: absolute; top: -6px; width: 22px; height: 22px;
  background: var(--nhs-blue); border: 3px solid #fff;
  border-radius: 50%; transform: translateX(-50%);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3); transition: left 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 2;
}
.scale-labels {
  display: flex; justify-content: space-between;
  font-size: 0.7rem; color: var(--text-secondary); margin-top: 4px;
}

/* BMI Table */
.bmi-table-mini { width: 100%; padding: 0 24px; margin-bottom: 16px; }
.bmi-table-mini table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.bmi-table-mini tr { border-bottom: 1px solid var(--light-grey); }
.bmi-table-mini tr:last-child { border-bottom: none; }
.bmi-table-mini td { padding: 5px 6px; }
.bmi-table-mini .td-range { font-weight: 600; }
.bmi-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.bmi-table-mini .current-row { background: var(--nhs-pale-blue); font-weight: 700; border-radius: 4px; }

/* Body Visualizer */
.body-visualizer {
  padding: 16px 24px 24px; display: flex; flex-direction: column; align-items: center; flex: 1;
}
.visualizer-title { font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 16px; }
.body-svg-container {
  width: 160px; height: 260px; position: relative;
  display: flex; align-items: center; justify-content: center;
}
#bodyVisualizerSVG { transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1); }
.body-info-tags {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 14px;
}
.body-tag {
  padding: 4px 10px; border-radius: 12px;
  font-size: 0.75rem; font-weight: 600; background: var(--light-grey); color: var(--text-secondary);
}

/* Result Actions */
.result-actions { padding: 0 24px 20px; display: flex; gap: 8px; }
.btn-result-action {
  flex: 1; padding: 9px 12px; border-radius: 6px;
  font-size: 0.8rem; font-weight: 600; transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.btn-share { background: var(--nhs-pale-blue); color: var(--nhs-blue); border: 1.5px solid var(--nhs-light-blue); }
.btn-share:hover { background: var(--nhs-light-blue); }
.btn-print { background: var(--light-grey); color: var(--dark-grey); border: 1.5px solid var(--mid-grey); }
.btn-print:hover { background: var(--mid-grey); }

/* ========================================
   BMI INFO SECTION
   ======================================== */
.bmi-info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; }
.bmi-info-card {
  padding: 20px 18px; border-radius: var(--border-radius);
  border: 1.5px solid transparent; transition: var(--transition);
  text-align: center;
}
.bmi-info-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.bmi-info-card.underweight { background: #eff6ff; border-color: #bfdbfe; }
.bmi-info-card.normal { background: #f0fdf4; border-color: #bbf7d0; }
.bmi-info-card.overweight { background: #fffbeb; border-color: #fde68a; }
.bmi-info-card.obese { background: #fef2f2; border-color: #fecaca; }
.bmi-info-card .card-range {
  font-size: 1.3rem; font-weight: 800; margin-bottom: 4px;
}
.underweight .card-range { color: #2563eb; }
.normal .card-range { color: #16a34a; }
.overweight .card-range { color: #d97706; }
.obese .card-range { color: #dc2626; }
.bmi-info-card .card-label { font-size: 0.85rem; font-weight: 700; margin-bottom: 6px; }
.bmi-info-card .card-desc { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; }

/* ========================================
   TOOLS CARDS SECTION
   ======================================== */
.tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tool-card {
  background: var(--white); border-radius: var(--border-radius-lg);
  border: 1.5px solid var(--mid-grey); padding: 28px 24px;
  transition: var(--transition); display: flex; flex-direction: column;
  position: relative; overflow: hidden;
}
.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--nhs-blue); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s ease;
}
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--nhs-light-blue); }
.tool-card:hover::before { transform: scaleX(1); }
.tool-card-icon {
  width: 52px; height: 52px; border-radius: var(--border-radius);
  background: var(--nhs-pale-blue); display: flex; align-items: center;
  justify-content: center; margin-bottom: 16px; transition: var(--transition);
}
.tool-card:hover .tool-card-icon { background: var(--nhs-blue); }
.tool-card:hover .tool-card-icon svg { color: #fff !important; }
.tool-card-badge {
  position: absolute; top: 16px; right: 16px;
  background: var(--nhs-light-blue); color: var(--nhs-blue);
  font-size: 0.68rem; font-weight: 700; padding: 3px 8px;
  border-radius: 12px; text-transform: uppercase; letter-spacing: 0.5px;
}
.tool-card-badge.coming-soon { background: #fef9c3; color: #a16207; }
.tool-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.tool-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; flex: 1; margin-bottom: 20px; }
.btn-tool {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: 6px;
  background: var(--nhs-pale-blue); color: var(--nhs-blue);
  font-size: 0.85rem; font-weight: 600; border: 1.5px solid var(--nhs-light-blue);
  transition: var(--transition); width: fit-content;
}
.btn-tool:hover { background: var(--nhs-blue); color: #fff; border-color: var(--nhs-blue); text-decoration: none; }
.btn-tool.disabled { pointer-events: none; opacity: 0.6; }

/* ========================================
   HOW IT WORKS
   ======================================== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.steps-grid::before {
  content: ''; position: absolute;
  top: 28px; left: calc(12.5% + 28px); right: calc(12.5% + 28px);
  height: 2px; background: var(--nhs-light-blue); z-index: 0;
}
.step-card { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--nhs-blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 800; margin: 0 auto 16px;
  box-shadow: 0 0 0 6px var(--nhs-light-blue);
}
.step-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; }

/* ========================================
   FAQ SECTION
   ======================================== */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.faq-item {
  border: 1px solid var(--mid-grey); background: var(--white);
  margin: -1px 0 0 -1px; overflow: hidden;
}
.faq-item:first-child { border-radius: var(--border-radius) 0 0 0; }
.faq-item:nth-child(2) { border-radius: 0 var(--border-radius) 0 0; }
.faq-item:nth-last-child(2) { border-radius: 0 0 0 var(--border-radius); }
.faq-item:last-child { border-radius: 0 0 var(--border-radius) 0; }
.faq-question {
  width: 100%; padding: 20px 24px; text-align: left;
  font-size: 0.92rem; font-weight: 600; color: var(--text-primary);
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; background: var(--white); transition: var(--transition);
  cursor: pointer;
}
.faq-question:hover { background: var(--nhs-pale-blue); color: var(--nhs-blue); }
.faq-question.open { background: var(--nhs-pale-blue); color: var(--nhs-blue); }
.faq-icon { flex-shrink: 0; width: 20px; height: 20px; position: relative; }
.faq-icon::before, .faq-icon::after {
  content: ''; position: absolute; background: currentColor;
  border-radius: 2px; transition: var(--transition);
}
.faq-icon::before { width: 12px; height: 2px; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.faq-icon::after { width: 2px; height: 12px; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.faq-question.open .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }
.faq-answer {
  padding: 0 24px; max-height: 0; overflow: hidden;
  font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-answer.open { max-height: 300px; padding: 0 24px 20px; }

/* ========================================
   CONTENT SECTIONS
   ======================================== */
.content-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; align-items: start; }
.content-article h2 { font-size: 1.35rem; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
.content-article h3 { font-size: 1.1rem; font-weight: 700; margin: 24px 0 10px; color: var(--text-primary); }
.content-article p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 14px; }
.content-article ul { padding-left: 18px; margin-bottom: 14px; }
.content-article ul li { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; list-style: disc; margin-bottom: 4px; }

.sidebar-widget {
  background: var(--white); border-radius: var(--border-radius-lg);
  border: 1.5px solid var(--mid-grey); overflow: hidden; margin-bottom: 20px;
}
.widget-header {
  background: var(--nhs-blue); color: #fff; padding: 14px 20px;
  font-size: 0.9rem; font-weight: 700;
}
.widget-body { padding: 18px 20px; }
.widget-body ul li {
  padding: 8px 0; border-bottom: 1px solid var(--light-grey);
  font-size: 0.85rem;
}
.widget-body ul li:last-child { border-bottom: none; }
.widget-body ul li a { color: var(--nhs-blue); display: flex; align-items: center; gap: 6px; }
.widget-body ul li a::before { content: '›'; font-weight: 700; }
.widget-body ul li a:hover { text-decoration: underline; }
.widget-body p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.65; margin-bottom: 10px; }

/* ========================================
   DISCLAIMER BANNER
   ======================================== */
.disclaimer-banner {
  background: #fffbeb; border: 1.5px solid #fde68a;
  border-radius: var(--border-radius); padding: 16px 20px;
  display: flex; gap: 14px; align-items: flex-start; margin: 32px 0;
}
.disclaimer-banner svg { color: #d97706; flex-shrink: 0; margin-top: 2px; }
.disclaimer-banner p { font-size: 0.85rem; color: #78350f; line-height: 1.65; }
.disclaimer-banner strong { color: #92400e; }

/* ========================================
   NHS INFO BANNER
   ======================================== */
.nhs-info-banner {
  background: var(--nhs-pale-blue); border-left: 4px solid var(--nhs-blue);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  padding: 20px 24px; margin: 32px 0;
}
.nhs-info-banner p { font-size: 0.9rem; color: var(--text-primary); line-height: 1.7; margin: 0; }
.nhs-info-banner strong { color: var(--nhs-blue); }
.nhs-info-banner a { color: var(--nhs-blue); font-weight: 600; }

/* ========================================
   FOOTER
   ======================================== */
.site-footer { background: var(--text-primary); color: rgba(255,255,255,0.8); }
.footer-main { padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
.footer-brand { }
.footer-logo {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
}
.footer-logo-icon {
  width: 40px; height: 40px; background: var(--nhs-blue);
  border-radius: 6px; display: flex; align-items: center; justify-content: center;
}
.footer-logo-text { font-size: 1rem; font-weight: 700; color: #fff; }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; margin-bottom: 16px; }
.footer-social { display: flex; gap: 8px; }
.social-btn {
  width: 36px; height: 36px; border-radius: 6px;
  background: rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.social-btn:hover { background: var(--nhs-blue); }
.footer-col h4 { font-size: 0.9rem; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: 0.3px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.82rem; color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-col ul li a:hover { color: #fff; text-decoration: none; padding-left: 4px; }
.footer-contact-item {
  display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start;
}
.footer-contact-item svg { flex-shrink: 0; margin-top: 2px; opacity: 0.7; }
.footer-contact-item span { font-size: 0.82rem; color: rgba(255,255,255,0.7); line-height: 1.5; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
}
.footer-bottom-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 0.78rem; color: rgba(255,255,255,0.5); }
.footer-legal { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-legal a { font-size: 0.78rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-legal a:hover { color: rgba(255,255,255,0.9); text-decoration: none; }

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--nhs-blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); transition: var(--transition);
  opacity: 0; pointer-events: none; z-index: 999;
}
.back-to-top.show { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--nhs-dark-blue); transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ========================================
   COOKIE BANNER
   ======================================== */
.cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 1001;
  background: var(--text-primary); color: rgba(255,255,255,0.9);
  padding: 16px 20px; display: none; align-items: center; gap: 20px;
  flex-wrap: wrap; border-top: 3px solid var(--nhs-blue);
}
.cookie-banner.show { display: flex; }
.cookie-banner p { font-size: 0.85rem; flex: 1; min-width: 280px; }
.cookie-banner a { color: #93c5fd; }
.cookie-btns { display: flex; gap: 10px; flex-shrink: 0; }
.btn-cookie-accept {
  padding: 9px 20px; background: var(--nhs-blue); color: #fff;
  border-radius: 6px; font-size: 0.85rem; font-weight: 600;
  transition: var(--transition); border: none; cursor: pointer;
}
.btn-cookie-accept:hover { background: var(--nhs-dark-blue); }
.btn-cookie-decline {
  padding: 9px 20px; background: transparent; color: rgba(255,255,255,0.7);
  border: 1.5px solid rgba(255,255,255,0.3); border-radius: 6px;
  font-size: 0.85rem; font-weight: 600; transition: var(--transition); cursor: pointer;
}
.btn-cookie-decline:hover { border-color: rgba(255,255,255,0.6); color: #fff; }

/* ========================================
   TOAST / NOTIFICATION
   ======================================== */
.toast {
  position: fixed; top: 80px; right: 20px; z-index: 9999;
  background: var(--text-primary); color: #fff; padding: 12px 20px;
  border-radius: var(--border-radius); font-size: 0.85rem; font-weight: 600;
  box-shadow: var(--shadow-lg); transform: translateX(120%); transition: transform 0.3s ease;
  display: flex; align-items: center; gap: 10px; max-width: 320px;
}
.toast.show { transform: translateX(0); }
.toast-success { border-left: 4px solid #4ade80; }

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}
.animate-fade-up { animation: fadeInUp 0.5s ease forwards; }
.result-score { animation: countUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1); }

/* ========================================
   LOADING SPINNER
   ======================================== */
.spinner {
  width: 20px; height: 20px; border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff; border-radius: 50%;
  animation: spin 0.7s linear infinite; display: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
.calculating .spinner { display: block; }
.calculating .btn-arrow { display: none; }

/* ========================================
   RESPONSIVE - TABLET
   ======================================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { display: none; }
  .calculator-wrapper { grid-template-columns: 1fr; }
  .calc-result-panel { min-height: auto; }
  .result-display { min-height: 400px; }
  .bmi-info-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .faq-grid { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ========================================
   RESPONSIVE - MOBILE
   ======================================== */
@media (max-width: 768px) {
  .hero { padding: 40px 0 50px; }
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .hero h1 { font-size: 1.7rem; }
  .hero-stats { gap: 16px; }
  .tools-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .bmi-info-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .trust-items { gap: 14px; }
  .nhs-top-bar .container { flex-direction: column; gap: 4px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .footer-legal { justify-content: center; }
  .section { padding: 48px 0; }
  .result-actions { flex-direction: column; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.45rem; }
  .calc-form-body { padding: 20px; }
  .bmi-info-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .gender-group { flex-wrap: wrap; }
  .hero-stats { flex-wrap: wrap; }
  .back-to-top { bottom: 16px; right: 16px; }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
  .site-header, .hero, .trust-bar, .tools-grid, .faq-section,
  .footer-main, .footer-bottom, .back-to-top, .cookie-banner, .nhs-top-bar { display: none !important; }
  .calc-form-panel, .calc-result-panel { box-shadow: none; border: 1px solid #ccc; }
  .result-display { display: flex !important; }
  body { font-size: 12pt; }
  a[href]::after { content: " (" attr(href) ")"; }
}