/* Instrument Case Humidity Guide — styles.css */

:root {
  --color-bg: #FDFAF5;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F5E6C8;
  --color-primary: #8B6914;
  --color-primary-dark: #5C4A0E;
  --color-primary-light: #D4A843;
  --color-text: #2C2416;
  --color-text-muted: #6B5D45;
  --color-text-light: #9C8B6E;
  --color-border: #E8D5B0;
  --color-danger: #B94A48;
  --color-danger-bg: #FDF0EF;
  --color-success: #3D7A3D;
  --color-success-bg: #EFF6EE;
  --color-warning: #C4880F;
  --color-warning-bg: #FEF8E8;
  --color-info: #3A6EA5;
  --color-info-bg: #EEF3FA;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.375rem;
  --font-size-2xl: 1.75rem;
  --font-size-3xl: 2.25rem;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.05);
  --max-width: 1100px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

a:hover, a:focus-visible {
  color: var(--color-primary);
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-primary-dark);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-size: var(--font-size-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

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

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.logo:hover, .logo:focus-visible {
  color: var(--color-primary-dark);
}

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

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--color-primary-dark);
  border-bottom-color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-menu {
  display: none;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 0.75rem 1.25rem;
}

.nav-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-menu a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  display: block;
  padding: 0.5rem 0;
}

.nav-menu a[aria-current="page"] {
  color: var(--color-primary-dark);
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: 3.5rem 0 3rem;
}

.hero-section h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.hero-sub {
  font-size: var(--font-size-lg);
  opacity: 0.92;
  max-width: 640px;
  line-height: 1.55;
}

/* Section styles */
.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.section-intro {
  color: var(--color-text-muted);
  max-width: 700px;
  margin-bottom: 1.5rem;
}

/* Advisor */
.advisor-section {
  padding: 3rem 0;
}

.advisor-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.advisor-controls {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

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

.form-label {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.form-select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236B5D45' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}

.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 105, 20, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.btn-primary {
  background: var(--color-primary-dark);
  color: #fff;
  border-color: var(--color-primary-dark);
  width: 100%;
}

.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 105, 20, 0.2);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary-dark);
  border-color: var(--color-border);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background: var(--color-surface-alt);
  border-color: var(--color-primary-light);
}

/* Results */
.advisor-results {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  min-height: 300px;
}

.results-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  min-height: 240px;
  color: var(--color-text-muted);
  gap: 1rem;
}

.results-empty p {
  max-width: 300px;
}

.result-range {
  text-align: center;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.25rem;
}

.result-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.result-value {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.1;
}

.result-sublabel {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: 0.25rem;
}

.result-action {
  margin-bottom: 1.25rem;
}

.action-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.action-add {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.action-remove {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.action-stable {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.result-action p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.result-methods, .result-warnings {
  margin-bottom: 1.25rem;
}

.result-methods h3, .result-warnings h3 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.result-methods ul, .result-warnings ul {
  list-style: none;
  padding: 0;
}

.result-methods li, .result-warnings li {
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.result-methods li::before {
  content: "+";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.result-warnings li::before {
  content: "!";
  position: absolute;
  left: 0;
  color: var(--color-warning);
  font-weight: 700;
}

.result-actions {
  display: flex;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

/* Reference table */
.reference-section {
  padding: 3rem 0;
  background: var(--color-surface);
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.reference-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  min-width: 680px;
}

.reference-table thead th {
  background: var(--color-surface-alt);
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 700;
  color: var(--color-primary-dark);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.reference-table tbody td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.reference-table tbody tr:hover {
  background: var(--color-bg);
}

.reference-table tbody tr:last-child td {
  border-bottom: none;
}

.table-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

/* DIY Guide */
.diy-section {
  padding: 3rem 0;
}

.diy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.diy-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.diy-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}

.diy-card ul, .diy-card ol {
  padding-left: 1.25rem;
  color: var(--color-text);
}

.diy-card li {
  margin-bottom: 0.4rem;
  line-height: 1.55;
}

.diy-tips {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
}

/* Warning signs */
.warning-section {
  padding: 3rem 0;
  background: var(--color-surface);
}

.warning-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.warning-card {
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.warning-dry {
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger);
}

.warning-wet {
  background: var(--color-info-bg);
  border: 1px solid var(--color-info);
}

.warning-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.warning-dry h3 { color: var(--color-danger); }
.warning-wet h3 { color: var(--color-info); }

.warning-card ul {
  padding-left: 1.25rem;
}

.warning-card li {
  margin-bottom: 0.35rem;
  line-height: 1.55;
}

/* Mistakes */
.mistakes-section {
  padding: 3rem 0;
}

.mistakes-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.mistake-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.mistake-card h3 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.mistake-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* FAQ */
.faq-section {
  padding: 3rem 0;
  background: var(--color-surface);
}

.faq-list {
  max-width: 760px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.faq-item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background: var(--color-bg);
}

.faq-item p {
  padding: 0 1.25rem 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Product recommendation */
.product-section {
  padding: 3rem 0;
}

.product-card {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.product-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-info h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.product-info p {
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.product-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-style: italic;
}

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.85);
  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;
}

.footer-brand .logo-text {
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.footer-brand p {
  margin-top: 0.5rem;
  font-size: var(--font-size-sm);
  opacity: 0.8;
  max-width: 280px;
}

.footer-links h3 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.35rem;
}

.footer-links a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition);
}

.footer-links a:hover, .footer-links a:focus-visible {
  color: #fff;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 1.25rem;
  font-size: var(--font-size-xs);
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 900px) {
  .advisor-layout {
    grid-template-columns: 1fr;
  }
  .diy-grid {
    grid-template-columns: 1fr;
  }
  .mistakes-list {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .site-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    display: block;
  }
  .hero-section {
    padding: 2.5rem 0 2rem;
  }
  .hero-section h1 {
    font-size: var(--font-size-2xl);
  }
  .hero-sub {
    font-size: var(--font-size-base);
  }
  .warning-grid {
    grid-template-columns: 1fr;
  }
  .mistakes-list {
    grid-template-columns: 1fr;
  }
  .product-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .result-actions {
    flex-direction: column;
  }
  .result-actions .btn {
    width: 100%;
  }
}

@media print {
  .site-header, .site-footer, .hero-section, .advisor-controls, .result-actions, .nav-toggle, .nav-menu {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .advisor-results, .diy-card, .warning-card, .mistake-card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  .section-title {
    break-after: avoid;
  }
}

/* Focus styles */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}



/* 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;
}