/*
Theme Name: Water Intake Calculator
Theme URI: https://waterintakecalculator.org
Author: Water Intake Calculator LLC
Author URI: https://waterintakecalculator.org
Description: A professional water intake calculator WordPress theme with 13 specialized hydration calculators. Built for waterintakecalculator.org with Apple-inspired UI, water-themed design, and evidence-based USA formulas.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: Proprietary
License URI: https://waterintakecalculator.org/terms
Text Domain: waterintakecalculator
Tags: calculator, health, water, hydration, responsive
*/

/* === SELF-HOSTED FONT: Plus Jakarta Sans (eliminates Google API dependency) === */
/* Fonts must be placed in /wp-content/themes/waterintakecalculator/fonts/
   Download from: https://fonts.google.com/specimen/Plus+Jakarta+Sans (OFL license)
   Required files: PlusJakartaSans-Regular.woff2, -Medium.woff2, -SemiBold.woff2,
                   -Bold.woff2, -ExtraBold.woff2 */
@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/PlusJakartaSans-Regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/PlusJakartaSans-Medium.woff2') format('woff2');
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/PlusJakartaSans-SemiBold.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/PlusJakartaSans-Bold.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/PlusJakartaSans-ExtraBold.woff2') format('woff2');
  font-weight: 800; font-style: normal; font-display: swap;
}

/* === DESIGN TOKENS === */
:root {
  --primary: #0096C7;
  --primary-dark: #0077A8;
  --primary-light: #00B4D8;
  --accent: #48CAE4;
  --accent-light: #90E0EF;
  --surface: #F0F8FF;
  --surface-2: #E8F5FC;
  --white: #FFFFFF;
  --text-primary: #1D1D1F;
  --text-secondary: #515154;
  --text-muted: #86868B;
  --border: #D2E9F5;
  --border-focus: #0096C7;
  --shadow-sm: 0 2px 8px rgba(0,150,199,0.08);
  --shadow-md: 0 4px 24px rgba(0,150,199,0.12);
  --shadow-lg: 0 12px 48px rgba(0,150,199,0.18);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  /* System font stack: Plus Jakarta Sans self-hosted → Apple SF Pro → system-ui fallback */
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-body:    'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; }

/* === TYPOGRAPHY === */
h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.025em; }
h2 { font-size: clamp(1.35rem, 2.8vw, 1.875rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; }
h3 { font-size: clamp(1.1rem, 2vw, 1.375rem); font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.1rem; font-weight: 600; line-height: 1.4; }
p { font-size: 1rem; line-height: 1.7; color: var(--text-secondary); }
strong { font-weight: 700; color: var(--text-primary); }

/* === LAYOUT === */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 760px; }
.container--wide { max-width: 1280px; }
.section { padding: 28px 0 48px; }
.section--sm { padding: 24px 0; }
.section--lg { padding: 64px 0; }

/* === HEADER === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}
.logo-text span { display: block; font-weight: 400; font-size: 0.75rem; color: var(--text-muted); }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.site-nav a:hover, .site-nav a.active {
  color: var(--primary);
  background: var(--surface);
}
.nav-home-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: white !important;
  background: var(--primary) !important;
  padding: 7px 14px !important;
  border-radius: var(--radius-sm) !important;
}
.nav-home-btn:hover { background: var(--primary-dark) !important; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

/* === HERO === */
.hero {
  background: linear-gradient(160deg, #E8F5FD 0%, #F0FAFF 50%, #E0F4F8 100%);
  padding: 48px 0 0;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,180,216,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { text-align: center; max-width: 680px; margin: 0 auto; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,150,199,0.1);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
  border: 1px solid rgba(0,150,199,0.2);
}
.hero h1 { color: var(--text-primary); margin-bottom: 16px; }
.hero p { font-size: 1.0625rem; color: var(--text-secondary); max-width: 560px; margin: 0 auto 32px; }

/* === CALCULATOR CARD === */
.calc-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  margin-top: 0;
  border: 1px solid var(--border);
  position: relative;
}
.calc-card--hero { max-width: 880px; margin: 16px auto 0; }
.calc-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.calc-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* === FORM ELEMENTS === */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-row--single { grid-template-columns: 1fr; }
.form-row--3 { grid-template-columns: 1fr 1fr 1fr; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.form-label .req { color: #FF3B30; font-size: 0.75rem; }
.input-wrap { position: relative; }
.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--text-primary);
  background: var(--white);
  transition: all var(--transition);
  outline: none;
  -webkit-appearance: none;
}
.form-input:focus { border-color: var(--border-focus); box-shadow: 0 0 0 3px rgba(0,150,199,0.12); }
.form-input.error { border-color: #FF3B30; box-shadow: 0 0 0 3px rgba(255,59,48,0.1); }
.form-input--unit { padding-right: 56px; }
.input-unit {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
}
.unit-toggle {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
}
.unit-toggle button {
  flex: 1;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.unit-toggle button.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(0,150,199,0.3);
}
.inline-error {
  font-size: 0.8125rem;
  color: #FF3B30;
  font-weight: 500;
  display: none;
  margin-top: 4px;
  align-items: center;
  gap: 4px;
}
.inline-error.show { display: flex; }

/* === BUTTON GROUPS (Gender, Activity, Climate) === */
.btn-group { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  flex: 1;
  min-width: 80px;
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}
.btn-option .btn-main { font-weight: 600; font-size: 0.875rem; }
.btn-option .btn-sub { font-size: 0.75rem; color: var(--text-muted); font-weight: 400; }
.btn-option:hover { border-color: var(--accent); background: var(--surface); }
.btn-option.active {
  border-color: var(--primary);
  background: rgba(0,150,199,0.07);
  color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,150,199,0.1);
}
.btn-option.active .btn-main { color: var(--primary); }
.btn-option.active .btn-sub { color: var(--primary-dark); }
.btn-option--2col { flex: 0 0 calc(50% - 4px); }
.btn-option--gender { flex: 0 0 calc(50% - 4px); max-width: 200px; }

/* === ADVANCED SECTION === */
.advanced-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  cursor: pointer;
  border-top: 1px solid var(--border);
  margin-top: 8px;
  user-select: none;
}
.advanced-toggle-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.advanced-toggle-arrow {
  color: var(--primary);
  transition: transform var(--transition);
}
.advanced-toggle.open .advanced-toggle-arrow { transform: rotate(180deg); }
.advanced-section { display: none; padding-top: 20px; }
.advanced-section.open { display: block; animation: slideDown 0.3s ease; }

/* === LIQUID INTAKE SECTION === */
.liquid-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.liquid-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  transition: all var(--transition);
}
.liquid-item:focus-within { border-color: var(--border-focus); }
.liquid-item-icon { font-size: 1.25rem; flex-shrink: 0; }
.liquid-item-label { flex: 1; }
.liquid-item-name { font-size: 0.8125rem; font-weight: 600; color: var(--text-primary); display: block; }
.liquid-item-size { font-size: 0.75rem; color: var(--text-muted); }
.liquid-count { width: 44px; text-align: center; border: 1px solid var(--border); border-radius: 6px; padding: 6px 4px; font-size: 0.875rem; font-weight: 600; }

/* === CALCULATE BUTTON === */
.btn-calculate {
  display: block;
  width: 100%;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 24px;
  box-shadow: 0 4px 16px rgba(0,150,199,0.35);
  letter-spacing: 0.01em;
  -webkit-tap-highlight-color: transparent;
}
.btn-calculate:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,150,199,0.45);
}
.btn-calculate:active { transform: translateY(0); }

/* === PRIVACY TRUST NOTE === */
.privacy-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 10px;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

/* === RESULTS === */
.results-panel {
  margin-top: 32px;
  padding: 32px;
  background: linear-gradient(135deg, #E8F5FD 0%, #F0FAFF 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  display: none;
  animation: fadeInUp 0.4s ease;
}
.results-panel.show { display: block; }
.results-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  text-align: center;
}
.results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.result-card {
  background: white;
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.result-value { font-size: 2rem; font-weight: 800; color: var(--primary); line-height: 1; margin-bottom: 4px; }
.result-unit { font-size: 0.875rem; font-weight: 500; color: var(--text-muted); }
.result-label { font-size: 0.8125rem; color: var(--text-secondary); margin-top: 8px; }

/* === WATER BOTTLE ANIMATION === */
.water-visual { display: flex; justify-content: center; margin-bottom: 24px; }
.water-bottle-svg { width: 80px; height: 140px; }
.water-fill {
  transition: height 1.2s cubic-bezier(0.4, 0, 0.2, 1), y 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.glasses-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.glass-icon {
  font-size: 1.5rem;
  opacity: 0.3;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.glass-icon.filled { opacity: 1; transform: scale(1.1); }

/* === RESULT BREAKDOWN === */
.breakdown-table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 0.875rem; }
.breakdown-table th {
  background: rgba(0,150,199,0.07);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
.breakdown-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); color: var(--text-secondary); }
.breakdown-table tr:last-child td { border-bottom: none; }

/* === CONTENT SECTIONS === */
.content-section { padding: 56px 0; }
.content-section--alt { background: var(--surface); }
.content-header { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.content-header h2 { color: var(--text-primary); margin-bottom: 12px; }
.content-header p { font-size: 1.0625rem; }

/* === FAQ === */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  gap: 16px;
  user-select: none;
  list-style: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-answer { padding: 0 0 20px; }
.faq-answer p { margin-bottom: 12px; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-icon { color: var(--primary); flex-shrink: 0; transition: transform var(--transition); font-size: 1.25rem; }
details[open] .faq-icon { transform: rotate(45deg); }

/* === INFO CARDS === */
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.info-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.info-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.info-card-icon { font-size: 2rem; margin-bottom: 12px; }
.info-card h3 { font-size: 1rem; margin-bottom: 8px; }
.info-card p { font-size: 0.875rem; }

/* === INTERNAL LINKS NAV === */
.calc-links-section { background: var(--surface); padding: 40px 0; }
.calc-links-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.calc-link-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: white;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  text-decoration: none;
}
.calc-link-card:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0,150,199,0.04);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.calc-link-card .icon { font-size: 1.125rem; flex-shrink: 0; }

/* === FOOTER === */
.site-footer {
  background: var(--text-primary);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand { }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo .logo-icon { background: rgba(255,255,255,0.1); }
.footer-logo .logo-text { color: white; }
.footer-logo .logo-text span { color: rgba(255,255,255,0.5); }
.footer-desc { font-size: 0.875rem; line-height: 1.6; margin-bottom: 20px; }
.footer-col-title { font-size: 0.8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: white; margin-bottom: 14px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 0.875rem; color: rgba(255,255,255,0.6); transition: color var(--transition); text-decoration: none; }
.footer-links a:hover { color: white; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-copyright { font-size: 0.8125rem; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { font-size: 0.8125rem; color: rgba(255,255,255,0.5); }
.footer-legal a:hover { color: white; }

/* === TABLES === */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.data-table th {
  background: var(--surface-2);
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border);
  font-size: 0.875rem;
}
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text-secondary); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface); }
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.table-annotation { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 12px; font-style: italic; }

/* === BREADCRUMB === */
.breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 0.8125rem; color: var(--text-muted); padding: 16px 0; flex-wrap: wrap; }
.breadcrumb a { color: var(--primary); }
.breadcrumb-sep { color: var(--text-muted); }

/* === PAGE CONTENT === */
/* ============================================================
   CALC HERO SECTION — two-column above-the-fold layout
   Desktop: info left | form right — both visible on load
   Mobile: compact info strip → form
   ============================================================ */
.calc-hero-section {
  background: linear-gradient(160deg, #E8F5FD 0%, #F0FAFF 100%);
  padding: 20px 0 36px;
}

.calc-hero-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  align-items: stretch;
  overflow: hidden;
}

/* LEFT: context column */
.calc-hero-info {
  width: 36%;
  min-width: 240px;
  flex-shrink: 0;
  padding: 28px 28px 28px 32px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, #F7FBFF 0%, var(--white) 100%);
}

.calc-hero-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.calc-hero-meta .breadcrumb { padding: 0; font-size: 0.775rem; }

.calc-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(0,150,199,0.08);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid rgba(0,150,199,0.2);
  white-space: nowrap;
}

.calc-hero-info h1 {
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.calc-hero-subtitle {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  flex: 1;
}

/* RIGHT: form column */
.calc-hero-form {
  flex: 1;
  padding: 24px 32px 28px;
  min-width: 0;
}

/* Mobile: single column, info strip then form */
@media (max-width: 767px) {
  .calc-hero-section { padding: 10px 0 24px; }

  .calc-hero-card {
    flex-direction: column;
    border-radius: var(--radius-lg);
  }

  .calc-hero-info {
    width: 100%;
    min-width: 0;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(90deg, #F0F8FD 0%, #F7FBFF 100%);
  }

  .calc-hero-meta {
    width: 100%;
    margin-bottom: 4px;
  }

  .calc-hero-subtitle { display: none; }

  .calc-hero-info h1 {
    font-size: 0.9375rem;
    margin-bottom: 0;
    line-height: 1.3;
    flex: 1;
    min-width: 0;
  }

  .calc-hero-form {
    padding: 16px 16px 20px;
  }
}

/* Legacy page-hero for corporate pages (about, contact, etc.) */
.page-hero {
  background: linear-gradient(160deg, #E8F5FD 0%, #F0FAFF 100%);
  padding: 40px 0 48px;
  border-bottom: 1px solid var(--border);
}
.page-hero .breadcrumb { margin-bottom: 12px; }
.page-hero h1 { margin-bottom: 10px; }
.page-hero .meta-desc { font-size: 1.0625rem; color: var(--text-secondary); max-width: 600px; }

/* === CORPORATE PAGES === */
.prose { max-width: 740px; }
.prose h2 { font-size: 1.5rem; margin: 36px 0 14px; color: var(--text-primary); }
.prose h3 { font-size: 1.2rem; margin: 24px 0 10px; color: var(--text-primary); }
.prose p { margin-bottom: 16px; }
.prose ul { list-style: disc; padding-left: 20px; margin-bottom: 16px; }
.prose ul li { margin-bottom: 6px; color: var(--text-secondary); font-size: 0.9375rem; }
.prose ol { list-style: decimal; padding-left: 20px; margin-bottom: 16px; }
.prose ol li { margin-bottom: 6px; color: var(--text-secondary); font-size: 0.9375rem; }
.prose a { font-weight: 500; }
.contact-form { max-width: 560px; }
.contact-form .form-group { margin-bottom: 20px; }
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form .btn-submit {
  padding: 14px 32px;
  background: var(--primary);
  color: white;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9375rem;
  transition: all var(--transition);
}
.contact-form .btn-submit:hover { background: var(--primary-dark); }

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes wavePulse {
  0%, 100% { transform: scaleX(1); }
  50% { transform: scaleX(1.02); }
}
.animate-in { animation: fadeInUp 0.5s ease both; }

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 12px;
    gap: 4px;
    box-shadow: var(--shadow-md);
  }
  .site-nav.open a { padding: 12px; }
  .nav-toggle { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 680px) {
  .calc-card { padding: 24px 20px; }
  .form-row { grid-template-columns: 1fr; }
  .form-row--3 { grid-template-columns: 1fr 1fr; }
  .results-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn-option { flex: 0 0 calc(50% - 4px); }
  .liquid-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 48px 0; }
  .info-grid { grid-template-columns: 1fr; }
}
@media (max-width: 440px) {
  .container { padding: 0 16px; }
  .results-grid { grid-template-columns: 1fr; }
  .form-row--3 { grid-template-columns: 1fr; }
  .liquid-grid { grid-template-columns: 1fr; }
}

/* === UTILITY === */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.gap-12 { gap: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }
.highlight-box {
  background: rgba(0,150,199,0.06);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 20px 0;
}
.highlight-box p { margin: 0; color: var(--text-primary); }

/* ─── SUB-CALC HERO ADDITIONS (matches front-page hero) ─── */
.hero-breadcrumb {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
}
.hero-breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}
.hero-breadcrumb a:hover { text-decoration: underline; }

.calc-trust-chips {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
  margin-bottom: 0;
}
.trust-chip {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.7);
  border: 1px solid rgba(0,0,0,0.09);
  border-radius: 100px;
  padding: 4px 12px;
}