/* ScreenCheck - Colorectal Cancer Screening Age & Risk Checker */
:root {
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-primary-light: #e8f0fe;
  --color-accent: #34a853;
  --color-accent-light: #e6f4ea;
  --color-warn: #f9ab00;
  --color-warn-light: #fef7e0;
  --color-danger: #ea4335;
  --color-danger-light: #fce8e6;
  --color-text: #202124;
  --color-text-secondary: #5f6368;
  --color-text-muted: #80868b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-bg-card: #ffffff;
  --color-border: #dadce0;
  --color-border-light: #e8eaed;
  --shadow-sm: 0 1px 3px rgba(60,64,67,0.12);
  --shadow-md: 0 2px 8px rgba(60,64,67,0.15);
  --shadow-lg: 0 4px 16px rgba(60,64,67,0.18);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --max-width: 1120px;
  --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);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus {
  top: 16px;
}

/* Header */
.site-header {
  background: var(--color-bg);
  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;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-text);
  flex-shrink: 0;
}
.logo:hover, .logo:focus {
  text-decoration: none;
  color: var(--color-primary);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
}

.main-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a:focus {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

@media (max-width: 768px) {
  .main-nav ul {
    gap: 0;
  }
  .main-nav a {
    padding: 6px 8px;
    font-size: 0.8rem;
  }
}

/* Checker Section */
.checker-section {
  padding: 48px 0 56px;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
}

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

@media (max-width: 900px) {
  .checker-layout {
    grid-template-columns: 1fr;
  }
}

.checker-form-panel {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}

.checker-form-panel h1 {
  font-size: 1.6rem;
  margin-bottom: 8px;
  line-height: 1.3;
}

.checker-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.field-group {
  margin-bottom: 20px;
}

.field-group label,
.field-group legend {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--color-text);
}

.field-group legend {
  margin-bottom: 10px;
}

.field-group input[type="number"],
.field-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.field-group input[type="number"]:focus,
.field-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

.field-group small {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

@media (max-width: 500px) {
  .checkbox-grid {
    grid-template-columns: 1fr;
  }
}

.checkbox-card {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  font-size: 0.85rem;
  line-height: 1.4;
  font-weight: 400;
}

.checkbox-card:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.checkbox-card input[type="checkbox"] {
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--color-primary);
}

.checkbox-card:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 24px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}

.btn-primary:hover, .btn-primary:focus {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}

.btn-secondary:hover, .btn-secondary:focus {
  background: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

/* Result Panel */
.checker-result-panel {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.result-placeholder {
  text-align: center;
  color: var(--color-text-muted);
}

.result-placeholder svg {
  margin-bottom: 16px;
}

.result-content {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-risk-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.risk-average { background: var(--color-accent-light); color: #1e8e3e; }
.risk-moderate { background: var(--color-warn-light); color: #b06000; }
.risk-high { background: var(--color-danger-light); color: #c5221f; }

.result-age {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 4px;
}

.result-age-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.result-detail {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.result-flags {
  list-style: none;
  margin-bottom: 20px;
}

.result-flags li {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 6px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.result-flags li.flag-warn {
  background: var(--color-warn-light);
  color: #7a4a00;
}

.result-flags li.flag-danger {
  background: var(--color-danger-light);
  color: #8b1a14;
}

.result-flags li.flag-info {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.result-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-light);
}

.result-disclaimer {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border-light);
  line-height: 1.5;
}

/* Scenarios Section */
.scenarios-section {
  padding: 56px 0;
  background: var(--color-bg-alt);
}

.scenarios-section h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.scenarios-section > .container > p {
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  max-width: 640px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 900px) {
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .scenario-grid {
    grid-template-columns: 1fr;
  }
}

.scenario-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.scenario-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.scenario-card--highlight {
  border-color: var(--color-primary);
  border-width: 2px;
}

.scenario-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.scenario-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  line-height: 1.4;
}

.scenario-card p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
  line-height: 1.5;
}

.scenario-note {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--color-border);
}

/* Prep Section */
.prep-section {
  padding: 56px 0;
}

.prep-section h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.prep-section > .container > p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 640px;
}

.prep-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.prep-controls label {
  font-weight: 600;
  font-size: 0.9rem;
}

.prep-controls select {
  padding: 8px 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
}

.prep-checklist {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.prep-checklist h3 {
  font-size: 1.15rem;
  margin-bottom: 16px;
}

.prep-checklist ul {
  list-style: none;
}

.prep-checklist li {
  margin-bottom: 10px;
  font-size: 0.92rem;
  line-height: 1.5;
}

.prep-checklist li label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.prep-checklist li input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
  accent-color: var(--color-accent);
}

.prep-checklist li.checked {
  text-decoration: line-through;
  color: var(--color-text-muted);
}

.prep-tip {
  margin-top: 20px;
  padding: 14px 18px;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: #1a5c2e;
  line-height: 1.5;
}

/* Questions Section */
.questions-section {
  padding: 56px 0;
  background: var(--color-bg-alt);
}

.questions-section h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.questions-section > .container > p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 640px;
}

.question-list {
  max-width: 720px;
}

.question-list details {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
}

.question-list summary {
  padding: 14px 18px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}

.question-list summary::-webkit-details-marker {
  display: none;
}

.question-list summary::after {
  content: '+';
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-left: 12px;
}

.question-list details[open] summary::after {
  content: '−';
}

.question-list summary:hover {
  background: var(--color-primary-light);
}

.question-list details p {
  padding: 0 18px 14px;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.copy-actions {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.copy-feedback {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
}

/* Notes Section */
.notes-section {
  padding: 56px 0;
}

.notes-section h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.notes-section > .container > p {
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  max-width: 640px;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

@media (max-width: 700px) {
  .notes-grid {
    grid-template-columns: 1fr;
  }
}

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

.note-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.note-card p, .note-card ul {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.note-card ul {
  padding-left: 18px;
  margin-top: 6px;
}

.note-card li {
  margin-bottom: 4px;
}

.last-updated {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background: var(--color-text);
  color: #bdc1c6;
  padding: 40px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  margin-bottom: 24px;
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-grid p {
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 4px;
}

.footer-links {
  list-style: none;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #bdc1c6;
  font-size: 0.85rem;
}

.footer-links a:hover, .footer-links a:focus {
  color: #fff;
}

.footer-legal {
  font-size: 0.78rem;
  color: #9aa0a6;
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid #3c4043;
}

/* Print styles */
@media print {
  .site-header, .site-footer, .checker-form-panel, .prep-controls, .copy-actions, .result-actions {
    display: none;
  }
  .checker-section {
    background: none;
    padding: 0;
  }
  .checker-result-panel {
    box-shadow: none;
    border: none;
    padding: 0;
  }
  body {
    color: #000;
  }
}

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

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


/* 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;
}