/* ===== CSS Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-alt: #f1f5f9;
  --color-text: #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-primary: #0d9488;
  --color-primary-dark: #0f766e;
  --color-primary-light: #ccfbf1;
  --color-accent: #f59e0b;
  --color-warn: #ef4444;
  --color-warn-light: #fef2f2;
  --color-success: #22c55e;
  --color-border: #e2e8f0;
  --color-border-focus: #0d9488;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1160px;
  --header-height: 64px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover, a:focus-visible { color: var(--color-primary-dark); text-decoration: underline; }

img, svg { display: block; max-width: 100%; }

.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: 9999;
  font-weight: 600;
}
.skip-link:focus { top: 8px; color: #fff; text-decoration: none; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}
.logo:hover, .logo:focus-visible { text-decoration: none; color: var(--color-text); }
.logo-accent { color: var(--color-primary); }
.site-nav {
  display: flex;
  gap: 24px;
}
.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav a:hover, .site-nav a:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  text-decoration: none;
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #0f766e 0%, #0d9488 40%, #14b8a6 100%);
  color: #fff;
  padding: 64px 0 56px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 1.1rem;
  opacity: 0.92;
  max-width: 600px;
  margin-bottom: 24px;
  line-height: 1.6;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.badge {
  display: inline-block;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
}

/* ===== Section Shared ===== */
section { padding: 56px 0; }
section:nth-child(even) { background: var(--color-surface); }
section:nth-child(odd):not(.hero) { background: var(--color-bg); }
h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 8px; }
.section-note { color: var(--color-text-secondary); margin-bottom: 32px; max-width: 680px; }

/* ===== Planner ===== */
.planner-section { background: var(--color-surface) !important; }
.planner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.planner-form-panel { position: relative; }
.planner-results-panel {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

/* ===== Form ===== */
.form-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
  background: var(--color-bg);
}
.form-legend {
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0 8px;
  margin-left: -8px;
  color: var(--color-text);
}
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.field { margin-bottom: 16px; }
.field-small { min-width: 120px; }
label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}
input, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(13,148,136,0.15);
}

/* ===== Zone Rows ===== */
.zone-row {
  display: grid;
  grid-template-columns: 1fr 130px 110px 36px;
  gap: 10px;
  align-items: end;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--color-border);
}
.zone-row:last-of-type { border-bottom: none; margin-bottom: 16px; }
.btn-remove-zone {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 38px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.btn-remove-zone:hover { background: var(--color-warn-light); color: var(--color-warn); border-color: var(--color-warn); }

/* ===== Buttons ===== */
.form-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn-primary, .btn-secondary, .btn-ghost {
  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);
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  background: var(--color-primary-light);
  text-decoration: none;
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  background: var(--color-surface-alt);
  color: var(--color-text);
  text-decoration: none;
}
.btn-small { padding: 8px 16px; font-size: 0.85rem; }

/* ===== Saved Routes ===== */
.saved-routes {
  margin-top: 24px;
  padding: 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.saved-routes h3 { font-size: 0.95rem; margin-bottom: 12px; }
.saved-route-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  gap: 8px;
}
.saved-route-item:last-child { margin-bottom: 12px; }
.saved-route-name { font-weight: 600; font-size: 0.9rem; }
.saved-route-meta { font-size: 0.8rem; color: var(--color-text-muted); }

/* ===== Results ===== */
.results-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
}
.results-empty svg { margin: 0 auto 16px; }
.results-empty p { font-size: 0.95rem; }

.result-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
.result-stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.result-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.result-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
}
.result-warn { color: var(--color-warn); }
.result-accent { color: var(--color-primary); }

.result-impact-bar { margin-bottom: 24px; }
.impact-track {
  height: 8px;
  background: linear-gradient(90deg, var(--color-success), var(--color-accent), var(--color-warn));
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}
.impact-fill {
  height: 100%;
  width: 0%;
  background: rgba(0,0,0,0.15);
  border-radius: 4px;
  transition: width 0.4s ease;
}
.impact-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.result-zones { margin-bottom: 24px; }
.result-zones h3, .result-alternatives h3 { font-size: 0.95rem; margin-bottom: 10px; }
.zones-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.zones-table th {
  text-align: left;
  padding: 8px 10px;
  background: var(--color-surface-alt);
  border-bottom: 2px solid var(--color-border);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}
.zones-table td { padding: 8px 10px; border-bottom: 1px solid var(--color-border); }
.zones-table tr:last-child td { border-bottom: none; }

.result-alternatives ul { list-style: none; padding: 0; }
.result-alternatives li {
  padding: 8px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  font-size: 0.88rem;
}
.result-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }

/* ===== Worksheet ===== */
.worksheet-section { background: var(--color-surface) !important; }
.worksheet-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.worksheet-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}
.worksheet-card h3 { font-size: 0.95rem; margin-bottom: 14px; padding-bottom: 8px; border-bottom: 2px solid var(--color-primary); }
.worksheet-fields > div { margin-bottom: 12px; }
.worksheet-fields dt { font-size: 0.75rem; font-weight: 600; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.ws-line {
  border-bottom: 1px solid var(--color-border);
  min-height: 28px;
  font-size: 0.92rem;
  padding: 4px 0;
}
.ws-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.ws-table th { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--color-border); font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; }
.ws-table td { padding: 6px 8px; border-bottom: 1px solid var(--color-border); }
.ws-notes { min-height: 100px; border: 1px dashed var(--color-border); border-radius: var(--radius-sm); padding: 12px; }
.worksheet-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Patterns ===== */
.patterns-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.pattern-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}
.pattern-icon { font-size: 2rem; margin-bottom: 12px; }
.pattern-card h3 { font-size: 1rem; margin-bottom: 8px; }
.pattern-card p { font-size: 0.88rem; color: var(--color-text-secondary); line-height: 1.5; }
.patterns-extra {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}
.patterns-extra h3 { font-size: 1rem; margin-bottom: 10px; }
.patterns-extra p { font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.6; }

/* ===== Mistakes ===== */
.mistakes-section { background: var(--color-surface) !important; }
.mistakes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.mistake-card {
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
}
.mistake-card h3 { font-size: 0.95rem; margin-bottom: 6px; }
.mistake-card p { font-size: 0.88rem; color: var(--color-text-secondary); line-height: 1.5; }

/* ===== Time of Day ===== */
.time-section { background: var(--color-bg) !important; }
.time-table-wrapper { overflow-x: auto; }
.time-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.time-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.time-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.time-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.time-table td { padding: 10px 14px; border-bottom: 1px solid var(--color-border); }
.time-table tr:nth-child(even) td { background: var(--color-surface); }

/* ===== Why ===== */
.why-section { background: var(--color-surface) !important; }
.why-content p { font-size: 0.95rem; color: var(--color-text-secondary); margin-bottom: 14px; max-width: 720px; }
.version-note { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 20px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-text);
  color: #cbd5e1;
  padding: 40px 0 20px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #334155;
}
.footer-brand .logo-text { color: #fff; font-size: 1.1rem; }
.footer-brand p { font-size: 0.85rem; margin-top: 4px; color: #94a3b8; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: #94a3b8; font-size: 0.88rem; }
.footer-links a:hover, .footer-links a:focus-visible { color: #fff; }
.footer-bottom p { font-size: 0.82rem; color: #64748b; }
.footer-bottom a { color: #94a3b8; }

/* ===== Copy Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ===== Print Styles ===== */
@media print {
  .site-header, .site-footer, .hero, .form-actions, .result-actions, .worksheet-actions, .btn-primary, .btn-secondary, .btn-ghost, .btn-remove-zone, #add-zone-btn, #saved-routes { display: none !important; }
  body { background: #fff; color: #000; }
  .planner-grid { display: block; }
  .worksheet-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; }
  section { padding: 16px 0; break-inside: avoid; }
  .results-content, .worksheet-card { break-inside: avoid; }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .planner-grid { grid-template-columns: 1fr; }
  .planner-results-panel { position: static; }
  .patterns-grid { grid-template-columns: repeat(2, 1fr); }
  .worksheet-grid { grid-template-columns: 1fr; }
  .mistakes-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .field-row { grid-template-columns: 1fr; }
  .zone-row { grid-template-columns: 1fr 1fr; gap: 8px; }
  .zone-row .field:first-child { grid-column: 1 / -1; }
  .btn-remove-zone { grid-column: 2; justify-self: end; }
  .result-summary { grid-template-columns: 1fr 1fr; }
  .patterns-grid { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 36px; }
  section { padding: 40px 0; }
  .footer-top { flex-direction: column; }
  .site-nav { gap: 14px; }
  .site-nav a { font-size: 0.82rem; }
}



/* 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;
}