/* Trail Difficulty Calibrator — styles.css */
:root {
  --color-bg: #F7F5F0;
  --color-surface: #FFFFFF;
  --color-surface-alt: #EDE8DF;
  --color-text: #2C2C2C;
  --color-text-muted: #5A5A5A;
  --color-text-light: #8A8A8A;
  --color-primary: #5B8C3E;
  --color-primary-dark: #3D5A28;
  --color-primary-light: #E8F0DF;
  --color-accent: #C47A2B;
  --color-accent-light: #FFF3E0;
  --color-danger: #B04040;
  --color-danger-light: #FDE8E8;
  --color-info: #3A7CA5;
  --color-info-light: #E3EEF5;
  --color-border: #D4CFC4;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.05);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  --max-width: 960px;
  --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--color-text); font-weight: 700; font-size: 1.1rem; }
.logo:hover { color: var(--color-primary-dark); }

.main-nav ul { display: flex; list-style: none; gap: 24px; }
.main-nav a { text-decoration: none; color: var(--color-text-muted); font-size: 0.9rem; font-weight: 500; padding: 4px 0; border-bottom: 2px solid transparent; transition: var(--transition); }
.main-nav a:hover { color: var(--color-primary-dark); border-bottom-color: var(--color-primary); }

/* Hero */
.hero { background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-bg) 100%); padding: 48px 0 32px; text-align: center; }
.hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; line-height: 1.2; margin-bottom: 12px; color: var(--color-primary-dark); }
.hero-subtitle { font-size: 1.05rem; color: var(--color-text-muted); max-width: 560px; margin: 0 auto; }

/* Translator panel */
.translator-panel { padding: 32px 0; }
.panel-card { background: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 28px 24px; }
.panel-card h2 { font-size: 1.3rem; margin-bottom: 20px; color: var(--color-primary-dark); }

.translator-controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 20px; }
.control-group label { display: block; font-weight: 600; font-size: 0.85rem; margin-bottom: 4px; color: var(--color-text); }
.control-group select { width: 100%; padding: 10px 12px; border: 1.5px solid var(--color-border); border-radius: var(--radius); font-size: 0.95rem; font-family: var(--font-sans); background: var(--color-bg); color: var(--color-text); transition: var(--transition); appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%235A5A5A' stroke-width='1.5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 32px; }
.control-group select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(91,140,62,0.15); }
.control-group small { display: block; font-size: 0.78rem; color: var(--color-text-light); margin-top: 4px; }

.btn-primary { display: inline-block; padding: 12px 28px; background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius); font-size: 1rem; font-weight: 600; cursor: pointer; transition: var(--transition); font-family: var(--font-sans); }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-primary:focus { outline: none; box-shadow: 0 0 0 3px rgba(91,140,62,0.3); }

.btn-secondary { display: inline-block; padding: 8px 16px; background: var(--color-surface-alt); color: var(--color-text); border: 1.5px solid var(--color-border); border-radius: var(--radius); font-size: 0.85rem; font-weight: 500; cursor: pointer; transition: var(--transition); font-family: var(--font-sans); }
.btn-secondary:hover { background: var(--color-border); }
.btn-secondary:focus { outline: none; box-shadow: 0 0 0 3px rgba(91,140,62,0.2); }

/* Output */
.translator-output { margin-top: 24px; }
.output-empty { text-align: center; color: var(--color-text-light); padding: 24px; background: var(--color-bg); border-radius: var(--radius); border: 1.5px dashed var(--color-border); }

.output-results { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.result-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.result-header h3 { font-size: 1.15rem; color: var(--color-primary-dark); }
.result-badge { display: inline-block; padding: 3px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.badge-easy { background: #E8F5E9; color: #2E7D32; }
.badge-moderate { background: var(--color-accent-light); color: #8B4513; }
.badge-hard { background: var(--color-danger-light); color: var(--color-danger); }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 20px; }
.result-card { background: var(--color-bg); border-radius: var(--radius); padding: 14px 16px; border: 1px solid var(--color-border); }
.result-card h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--color-text-light); margin-bottom: 6px; }
.result-card p { font-size: 0.9rem; color: var(--color-text); }

.result-comparison { margin-bottom: 20px; }
.result-comparison h4 { font-size: 0.85rem; margin-bottom: 8px; color: var(--color-text-muted); }
.comparison-mini { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.comparison-mini th { text-align: left; padding: 8px 12px; background: var(--color-surface-alt); font-weight: 600; color: var(--color-text-muted); border-bottom: 1.5px solid var(--color-border); }
.comparison-mini td { padding: 8px 12px; border-bottom: 1px solid var(--color-border); }
.comparison-mini tr:last-child td { border-bottom: none; }
.comparison-mini tr.highlight td { background: var(--color-primary-light); }

.result-fitness { background: var(--color-info-light); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 16px; border-left: 4px solid var(--color-info); }
.result-fitness h4 { font-size: 0.85rem; color: var(--color-info); margin-bottom: 4px; }
.result-fitness p { font-size: 0.9rem; }
.result-fitness .fitness-warning { color: var(--color-accent); }
.result-fitness .fitness-danger { color: var(--color-danger); }
.result-fitness .fitness-ok { color: var(--color-primary-dark); }

.result-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.copy-confirm { font-size: 0.82rem; color: var(--color-primary); margin-top: 8px; }

/* Comparison section */
.comparison-section { padding: 40px 0; }
.comparison-section h2 { font-size: 1.4rem; margin-bottom: 8px; color: var(--color-primary-dark); }
.section-intro { color: var(--color-text-muted); font-size: 0.92rem; margin-bottom: 20px; max-width: 680px; }

.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.comparison-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; background: var(--color-surface); min-width: 700px; }
.comparison-table th { padding: 12px 14px; text-align: left; background: var(--color-primary-dark); color: #fff; font-weight: 600; }
.comparison-table td { padding: 12px 14px; border-bottom: 1px solid var(--color-border); }
.comparison-table tbody tr:hover { background: var(--color-primary-light); }
.comparison-table tbody tr:last-child td { border-bottom: none; }

/* Calibration */
.calibration-section { padding: 40px 0; background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.calibration-section h2 { font-size: 1.4rem; margin-bottom: 8px; color: var(--color-primary-dark); }
.calibration-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.cal-card { background: var(--color-bg); border-radius: var(--radius-lg); padding: 20px; border: 1px solid var(--color-border); }
.cal-level { display: inline-block; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; padding: 3px 10px; border-radius: 20px; background: var(--color-primary); color: #fff; margin-bottom: 10px; }
.cal-card h3 { font-size: 1rem; margin-bottom: 10px; color: var(--color-text); }
.cal-card ul { list-style: none; }
.cal-card li { font-size: 0.88rem; color: var(--color-text-muted); padding: 4px 0; padding-left: 18px; position: relative; }
.cal-card li::before { content: "→"; position: absolute; left: 0; color: var(--color-primary); font-weight: 700; }

/* Field notes */
.field-notes { padding: 40px 0; }
.field-notes h2 { font-size: 1.4rem; margin-bottom: 8px; color: var(--color-primary-dark); }
.notes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.note-card { background: var(--color-surface); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); border-left: 4px solid var(--color-accent); }
.note-card h3 { font-size: 0.95rem; margin-bottom: 8px; color: var(--color-text); }
.note-card p { font-size: 0.88rem; color: var(--color-text-muted); line-height: 1.55; }

/* FAQ */
.faq-section { padding: 40px 0; background: var(--color-surface); border-top: 1px solid var(--color-border); }
.faq-section h2 { font-size: 1.4rem; margin-bottom: 20px; color: var(--color-primary-dark); }
.faq-list { display: grid; gap: 16px; }
.faq-list dt { font-weight: 700; font-size: 0.95rem; color: var(--color-text); }
.faq-list dd { font-size: 0.9rem; color: var(--color-text-muted); margin-top: 4px; line-height: 1.55; }

/* About */
.about-section { padding: 40px 0; }
.about-section h2 { font-size: 1.4rem; margin-bottom: 12px; color: var(--color-primary-dark); }
.about-section p { font-size: 0.92rem; color: var(--color-text-muted); margin-bottom: 12px; max-width: 680px; line-height: 1.6; }
.last-updated { font-size: 0.8rem; color: var(--color-text-light); margin-top: 16px; }

/* Footer */
.site-footer { background: var(--color-text); color: #ccc; padding: 40px 0 24px; font-size: 0.85rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 24px; margin-bottom: 24px; }
.footer-brand { color: #fff; font-size: 1rem; }
.site-footer h4 { color: #fff; font-size: 0.85rem; margin-bottom: 8px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 4px; }
.footer-links a { color: #aaa; text-decoration: none; }
.footer-links a:hover { color: #fff; }
.footer-note { border-top: 1px solid #444; padding-top: 16px; font-size: 0.78rem; color: #888; text-align: center; }

/* Responsive */
@media (max-width: 640px) {
  .site-header .container { flex-direction: column; gap: 8px; }
  .main-nav ul { gap: 16px; }
  .hero { padding: 32px 0 20px; }
  .translator-controls { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .result-actions { flex-direction: column; }
  .result-actions button { width: 100%; text-align: center; }
}

@media (max-width: 420px) {
  .result-grid { grid-template-columns: 1fr; }
  .calibration-grid { grid-template-columns: 1fr; }
}

/* Print */
@media print {
  .site-header, .site-footer, .result-actions, .hero { display: none; }
  body { background: #fff; color: #000; }
  .panel-card, .note-card { box-shadow: none; border: 1px solid #ccc; }
}

/* 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; scroll-behavior: auto !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;
}