/* Diapering Cost Comparison Engine - Styles */
:root {
  --color-primary: #4A90D9;
  --color-primary-dark: #2C5F8A;
  --color-primary-light: #E8F0FE;
  --color-accent: #F5A623;
  --color-accent-dark: #D48E1A;
  --color-success: #27AE60;
  --color-success-light: #E8F8EF;
  --color-warning: #E67E22;
  --color-danger: #E74C3C;
  --color-text: #2C3E50;
  --color-text-light: #5D6D7E;
  --color-text-muted: #85929E;
  --color-bg: #F8FAFC;
  --color-white: #FFFFFF;
  --color-border: #D5DBDB;
  --color-border-light: #EBF0F2;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --transition: 0.2s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover, a:focus {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

img, svg {
  max-width: 100%;
  height: auto;
}

/* Header */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
}

.logo:hover, .logo:focus {
  text-decoration: none;
  color: var(--color-text);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
}

.logo-accent {
  color: var(--color-primary);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 24px;
}

.main-nav a {
  color: var(--color-text-light);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.main-nav a:hover, .main-nav a:focus {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: 48px 0;
  text-align: center;
}

.hero-section h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}

.hero-sub {
  font-size: 1.1rem;
  opacity: 0.92;
  max-width: 600px;
  margin: 0 auto;
}

/* Workspace */
.comparison-workspace {
  padding: 40px 0;
}

.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

/* Input Panel */
.input-panel {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.input-panel h2 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: var(--color-primary-dark);
}

.form-group {
  border: none;
  margin-bottom: 24px;
  padding: 0;
}

.section-label {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  display: block;
}

.field {
  margin-bottom: 16px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 4px;
  color: var(--color-text);
}

.hint {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

input[type="range"] {
  width: calc(100% - 50px);
  vertical-align: middle;
  accent-color: var(--color-primary);
}

.range-output {
  display: inline-block;
  width: 40px;
  text-align: center;
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.1rem;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover, .btn-primary:focus {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-text-light);
  border-color: var(--color-border);
}

.btn-secondary:hover, .btn-secondary:focus {
  background: var(--color-bg);
  border-color: var(--color-text-muted);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-outline:hover, .btn-outline:focus {
  background: var(--color-primary-light);
  text-decoration: none;
}

/* Results Panel */
.results-panel {
  position: relative;
}

.results-sticky {
  position: sticky;
  top: 80px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.results-panel h2 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: var(--color-primary-dark);
}

.empty-state {
  color: var(--color-text-muted);
  font-style: italic;
  text-align: center;
  padding: 40px 20px;
}

.result-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.result-card {
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: all var(--transition);
}

.result-card.winner {
  border-color: var(--color-success);
  background: var(--color-success-light);
}

.result-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.result-card-title {
  font-weight: 700;
  font-size: 1rem;
}

.result-card-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-success);
  color: var(--color-white);
  padding: 2px 8px;
  border-radius: 10px;
}

.result-card-total {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
}

.result-card-detail {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.result-card-breakdown {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border-light);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.result-card-breakdown dt {
  font-weight: 600;
  display: inline;
}

.result-card-breakdown dd {
  display: inline;
  margin-left: 4px;
}

.result-card-breakdown dd::after {
  content: '';
  display: block;
  margin-bottom: 4px;
}

/* Chart */
.results-chart {
  margin: 20px 0;
}

.chart-bar-group {
  margin-bottom: 12px;
}

.chart-bar-label {
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  justify-content: space-between;
}

.chart-bar-track {
  height: 24px;
  background: var(--color-border-light);
  border-radius: 12px;
  overflow: hidden;
}

.chart-bar-fill {
  height: 100%;
  border-radius: 12px;
  transition: width 0.6s ease;
  min-width: 4px;
}

.chart-bar-fill.disposable { background: var(--color-primary); }
.chart-bar-fill.cloth { background: var(--color-success); }
.chart-bar-fill.hybrid { background: var(--color-accent); }

/* Results actions */
.results-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}

.savings-callout {
  background: var(--color-success-light);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-top: 16px;
  font-size: 0.9rem;
}

.savings-callout strong {
  color: var(--color-success);
}

/* Info Section */
.info-section {
  padding: 48px 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border-light);
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.info-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border-light);
}

.info-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  color: var(--color-primary-dark);
}

.info-card p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin-bottom: 10px;
}

.info-card ul {
  padding-left: 18px;
  font-size: 0.92rem;
  color: var(--color-text-light);
}

.info-card li {
  margin-bottom: 8px;
}

/* FAQ */
.faq-section {
  padding: 48px 0;
}

.faq-section h2 {
  font-size: 1.5rem;
  margin-bottom: 24px;
  text-align: center;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border-light);
}

.faq-toggle {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 16px 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-toggle::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-toggle[aria-expanded="true"]::after {
  content: '−';
}

.faq-toggle:hover {
  color: var(--color-primary);
}

.faq-answer {
  padding: 0 0 16px;
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Footer */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  padding: 40px 0 24px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer-brand .logo-text {
  color: var(--color-white);
  font-size: 1.1rem;
}

.footer-brand p {
  font-size: 0.85rem;
  margin-top: 8px;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
}

.footer-nav a:hover, .footer-nav a:focus {
  color: var(--color-white);
}

.footer-meta {
  font-size: 0.8rem;
  text-align: right;
}

.footer-meta p {
  margin-bottom: 4px;
}

.footer-meta a {
  color: rgba(255,255,255,0.8);
}

/* Utilities */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-text);
  color: var(--color-white);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Print styles */
@media print {
  .site-header, .site-footer, .form-actions, .results-actions, .faq-section, .hero-section {
    display: none;
  }
  .comparison-workspace {
    padding: 0;
  }
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  .results-sticky {
    position: static;
    box-shadow: none;
    border: 1px solid #ccc;
  }
  .input-panel {
    box-shadow: none;
    border: 1px solid #ccc;
  }
  body {
    background: white;
    color: black;
  }
}

/* Responsive */
@media (max-width: 900px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
  .results-sticky {
    position: static;
  }
  .info-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-meta {
    text-align: center;
  }
}

@media (max-width: 600px) {
  .site-header .container {
    flex-direction: column;
    height: auto;
    padding: 12px 20px;
    gap: 8px;
  }
  .main-nav ul {
    gap: 16px;
  }
  .hero-section {
    padding: 32px 0;
  }
  .hero-section h1 {
    font-size: 1.5rem;
  }
  .hero-sub {
    font-size: 1rem;
  }
  .field-row {
    grid-template-columns: 1fr;
  }
  .form-actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .input-panel, .results-sticky {
    padding: 20px;
  }
  .result-card-total {
    font-size: 1.5rem;
  }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}