/* Tube Strike Commute Contingency Planner - Styles */
:root {
  --clr-bg: #f8f9fc;
  --clr-surface: #ffffff;
  --clr-surface-alt: #f0f4ff;
  --clr-border: #d2dff0;
  --clr-text: #1a1d26;
  --clr-text-muted: #5b6478;
  --clr-primary: #1a73e8;
  --clr-primary-dark: #1557b0;
  --clr-primary-light: #e8f0fe;
  --clr-accent: #f9ab00;
  --clr-danger: #d93025;
  --clr-success: #1e8e3e;
  --clr-warn-bg: #fef7e0;
  --clr-warn-border: #f9ab00;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --max-width: 1200px;
  --header-h: 60px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body { font-family: var(--font-sans); color: var(--clr-text); background: var(--clr-bg); line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; }

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

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

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--clr-surface); border-bottom: 1px solid var(--clr-border); box-shadow: var(--shadow); height: var(--header-h); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; color: var(--clr-text); }
.logo:hover, .logo:focus-visible { text-decoration: none; }
.logo-icon { flex-shrink: 0; }
.main-nav { display: flex; gap: 4px; }
.main-nav a { padding: 6px 12px; border-radius: var(--radius-sm); font-size: .9rem; color: var(--clr-text-muted); font-weight: 500; transition: background .15s, color .15s; }
.main-nav a:hover, .main-nav a:focus-visible { background: var(--clr-primary-light); color: var(--clr-primary); text-decoration: none; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 20px; border-radius: var(--radius-sm); font-size: .95rem; font-weight: 600; border: 2px solid transparent; cursor: pointer; transition: background .15s, border-color .15s, color .15s, box-shadow .15s; font-family: var(--font-sans); text-decoration: none; line-height: 1.4; }
.btn:hover, .btn:focus-visible { text-decoration: none; }
.btn-primary { background: var(--clr-primary); color: #fff; border-color: var(--clr-primary); }
.btn-primary:hover, .btn-primary:focus-visible { background: var(--clr-primary-dark); border-color: var(--clr-primary-dark); }
.btn-ghost { background: transparent; color: var(--clr-primary); border-color: var(--clr-border); }
.btn-ghost:hover, .btn-ghost:focus-visible { background: var(--clr-primary-light); border-color: var(--clr-primary); }
.btn-sm { padding: 6px 14px; font-size: .85rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Hero */
.hero { padding: 60px 0 40px; background: linear-gradient(180deg, var(--clr-surface) 0%, var(--clr-bg) 100%); }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.2; margin-bottom: 16px; }
.hero-sub { font-size: 1.1rem; color: var(--clr-text-muted); margin-bottom: 24px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.hero-note { font-size: .85rem; color: var(--clr-text-muted); }
.preview-card { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-md); }
.preview-header { font-weight: 700; margin-bottom: 12px; color: var(--clr-primary); }
.preview-row { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--clr-border); font-size: .9rem; }
.preview-row:last-child { border-bottom: none; }
.preview-row span:nth-child(2), .preview-row span:nth-child(3) { font-weight: 600; text-align: right; }

/* Planner Section */
.planner-section { padding: 48px 0; }
.planner-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.planner-form h2, .plan-output h2 { font-size: 1.4rem; margin-bottom: 20px; }

/* Form */
.form-fieldset { border: 1px solid var(--clr-border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; background: var(--clr-surface); }
.form-fieldset legend { font-weight: 700; font-size: 1rem; padding: 0 8px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; }
.form-group input, .form-group select { width: 100%; padding: 10px 14px; border: 2px solid var(--clr-border); border-radius: var(--radius-sm); font-size: .95rem; font-family: var(--font-sans); color: var(--clr-text); background: var(--clr-surface); transition: border-color .15s, box-shadow .15s; }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--clr-primary); box-shadow: 0 0 0 3px rgba(26,115,232,.15); }
.form-group input::placeholder { color: var(--clr-text-muted); opacity: .7; }

.checkbox-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.checkbox-card { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border: 2px solid var(--clr-border); border-radius: var(--radius-sm); cursor: pointer; transition: border-color .15s, background .15s; font-size: .9rem; font-weight: 500; background: var(--clr-surface); }
.checkbox-card:hover { border-color: var(--clr-primary); }
.checkbox-card input[type="checkbox"] { accent-color: var(--clr-primary); width: 18px; height: 18px; flex-shrink: 0; }
.checkbox-card:has(input:checked) { border-color: var(--clr-primary); background: var(--clr-primary-light); }

.form-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* Plan Output */
.plan-output { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); position: sticky; top: calc(var(--header-h) + 16px); max-height: calc(100vh - var(--header-h) - 32px); overflow-y: auto; }
.output-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.output-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.plan-empty { text-align: center; padding: 40px 20px; color: var(--clr-text-muted); }
.plan-empty svg { margin-bottom: 12px; opacity: .5; }
.plan-results.hidden { display: none; }

.plan-meta { font-size: .9rem; color: var(--clr-text-muted); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--clr-border); }

.plan-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; font-size: .9rem; }
.plan-table th { text-align: left; padding: 10px 12px; background: var(--clr-surface-alt); font-weight: 700; border-bottom: 2px solid var(--clr-border); }
.plan-table td { padding: 10px 12px; border-bottom: 1px solid var(--clr-border); }
.plan-table tr:last-child td { border-bottom: none; }
.plan-table tr:hover td { background: var(--clr-surface-alt); }
.plan-table .cost { font-weight: 700; color: var(--clr-primary); }
.plan-table .time { font-weight: 600; }
.plan-table .notes { color: var(--clr-text-muted); font-size: .85rem; }
.plan-table .badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: .75rem; font-weight: 700; }
.badge-best { background: #e6f4ea; color: var(--clr-success); }
.badge-warn { background: var(--clr-warn-bg); color: #b06000; }
.badge-over { background: #fce8e6; color: var(--clr-danger); }

.plan-summary { background: var(--clr-surface-alt); border-radius: var(--radius-sm); padding: 16px; font-size: .9rem; margin-bottom: 12px; }
.plan-summary strong { color: var(--clr-primary); }

.plan-warnings { background: var(--clr-warn-bg); border: 1px solid var(--clr-warn-border); border-radius: var(--radius-sm); padding: 14px 16px; font-size: .85rem; }
.plan-warnings ul { margin: 8px 0 0 20px; }
.plan-warnings li { margin-bottom: 4px; }

/* Info Sections */
.info-section { padding: 56px 0; }
.info-section.alt { background: var(--clr-surface); }
.info-section h2 { font-size: 1.6rem; margin-bottom: 32px; text-align: center; }
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.info-card { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.info-section.alt .info-card { background: var(--clr-bg); }
.info-card h3 { font-size: 1.05rem; margin-bottom: 10px; color: var(--clr-primary); }
.info-card p { font-size: .95rem; color: var(--clr-text-muted); }

.mistakes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.mistake-card { background: var(--clr-surface); border-left: 4px solid var(--clr-accent); border-radius: var(--radius); padding: 20px 24px; box-shadow: var(--shadow); }
.info-section.alt .mistake-card { background: var(--clr-bg); }
.mistake-card h3 { font-size: 1rem; margin-bottom: 8px; }
.mistake-card p { font-size: .9rem; color: var(--clr-text-muted); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius-sm); margin-bottom: 8px; overflow: hidden; }
.faq-item summary { padding: 16px 20px; font-weight: 600; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; font-size: .95rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.3rem; font-weight: 400; color: var(--clr-primary); flex-shrink: 0; margin-left: 12px; }
.faq-item[open] summary::after { content: '-'; }
.faq-item[open] summary { border-bottom: 1px solid var(--clr-border); }
.faq-item p { padding: 16px 20px; font-size: .95rem; color: var(--clr-text-muted); }

/* Footer */
.site-footer { margin-top: auto; background: var(--clr-surface); border-top: 1px solid var(--clr-border); padding: 40px 0 24px; font-size: .85rem; color: var(--clr-text-muted); }
.footer-top { margin-bottom: 20px; }
.footer-top p { margin-bottom: 8px; }
.footer-top strong { color: var(--clr-text); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--clr-border); }
.footer-links a { font-weight: 500; }
.footer-copy { font-size: .8rem; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-preview { order: -1; }
  .planner-layout { grid-template-columns: 1fr; }
  .plan-output { position: static; max-height: none; }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .main-nav { display: none; }
  .hero { padding: 40px 0 28px; }
  .form-row { grid-template-columns: 1fr; }
  .checkbox-grid { grid-template-columns: 1fr 1fr; }
  .output-header { flex-direction: column; align-items: flex-start; }
  .info-section { padding: 40px 0; }
}

@media print {
  .site-header, .site-footer, .hero, .info-section, .form-actions, .output-actions { display: none !important; }
  body { background: #fff; color: #000; }
  .plan-output { border: none; box-shadow: none; padding: 0; position: static; }
  .plan-table { font-size: .8rem; }
  .planner-form { display: none; }
  .planner-section { padding: 0; }
  .container { max-width: 100%; padding: 0; }
}

/* Focus styles */
:focus-visible { outline: 3px solid var(--clr-primary); outline-offset: 2px; }

/* Visually hidden */
.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 */
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--clr-text); color: #fff; padding: 12px 20px; border-radius: var(--radius-sm); font-size: .9rem; font-weight: 500; box-shadow: var(--shadow-md); z-index: 999; opacity: 0; transform: translateY(8px); transition: opacity .2s, transform .2s; pointer-events: none; }
.toast.show { opacity: 1; transform: translateY(0); }


/* 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;
}