/* Reset and base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --c-bg: #F8FAF9;
  --c-surface: #FFFFFF;
  --c-surface-alt: #F0F5F2;
  --c-border: #D6E2DB;
  --c-text: #1B3A2D;
  --c-text-muted: #4A6B5D;
  --c-primary: #2D6A4F;
  --c-primary-hover: #1B4332;
  --c-accent: #40916C;
  --c-accent-light: #B7E4C7;
  --c-danger: #D64045;
  --c-shadow: 0 1px 3px rgba(27,58,45,0.08), 0 4px 12px rgba(27,58,45,0.06);
  --c-shadow-lg: 0 4px 16px rgba(27,58,45,0.10), 0 8px 32px rgba(27,58,45,0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1120px;
  --transition: 0.2s ease;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--c-primary); text-decoration: none; }
a:hover, a:focus-visible { 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; z-index: 100;
  background: var(--c-primary); color: #fff; padding: 8px 16px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}
.skip-link:focus { top: 0; }

/* Header */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px; gap: 16px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  color: var(--c-text); font-weight: 700; font-size: 1.1rem;
}
.logo:hover, .logo:focus-visible { text-decoration: none; }
.logo-text { white-space: nowrap; }
.site-nav {
  display: flex; align-items: center; gap: 20px;
  font-size: 0.95rem;
}
.site-nav a { color: var(--c-text-muted); font-weight: 500; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--c-primary); }
.nav-out::after {
  content: ' ↗'; font-size: 0.8em;
}

/* Hero */
.hero {
  padding: 64px 0 48px;
  background: linear-gradient(180deg, var(--c-accent-light) 0%, var(--c-bg) 100%);
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.2; max-width: 600px;
}
.hero-sub {
  margin-top: 16px; font-size: 1.15rem;
  color: var(--c-text-muted); max-width: 520px;
}
.hero-actions {
  margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.95rem; cursor: pointer;
  border: 2px solid transparent; transition: all var(--transition);
  font-family: var(--font); line-height: 1.4;
}
.btn:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; }
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-hover); border-color: var(--c-primary-hover); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--c-primary); border-color: var(--c-border); }
.btn-ghost:hover { background: var(--c-surface-alt); text-decoration: none; }
.btn-sm { padding: 8px 16px; font-size: 0.88rem; }
.btn-danger { background: transparent; color: var(--c-danger); border-color: transparent; padding: 4px 8px; font-size: 0.82rem; }
.btn-danger:hover { background: #FFF0F0; }

/* Worksheet */
.worksheet { padding: 48px 0; }
.worksheet-grid {
  display: grid; grid-template-columns: 1fr 380px;
  gap: 32px; align-items: start;
}
.panel {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--c-shadow);
}
.panel h2 { font-size: 1.3rem; margin-bottom: 20px; }
.panel h3 { font-size: 1rem; margin: 24px 0 12px; color: var(--c-text-muted); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-weight: 600; font-size: 0.88rem;
  margin-bottom: 6px; color: var(--c-text-muted);
}
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  font-size: 0.95rem; font-family: var(--font);
  background: var(--c-bg); color: var(--c-text);
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(64,145,108,0.15);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* Presets */
.presets { margin-top: 24px; }
.preset-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.preset-card {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px; border: 1px solid var(--c-border);
  border-radius: var(--radius-sm); background: var(--c-surface-alt);
  cursor: pointer; text-align: left; font-family: var(--font);
  transition: all var(--transition);
}
.preset-card:hover, .preset-card:focus-visible {
  border-color: var(--c-accent); background: #E8F5EE;
  box-shadow: 0 0 0 2px rgba(64,145,108,0.15);
}
.preset-card strong { font-size: 0.92rem; color: var(--c-text); }
.preset-card span { font-size: 0.8rem; color: var(--c-text-muted); }

/* Lists */
.meal-list, .container-list { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.meal-item, .container-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; background: var(--c-surface-alt);
  border-radius: var(--radius-sm); border: 1px solid var(--c-border);
}
.meal-item-info, .container-item-info { display: flex; flex-direction: column; gap: 2px; }
.meal-item-name, .container-item-name { font-weight: 600; font-size: 0.92rem; }
.meal-item-meta, .container-item-meta { font-size: 0.8rem; color: var(--c-text-muted); }
.empty-state { color: var(--c-text-muted); font-size: 0.9rem; font-style: italic; padding: 12px 0; }

.divider { height: 1px; background: var(--c-border); margin: 28px 0; }

/* Results panel */
.panel-results { position: sticky; top: 80px; }
.results { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.result-card {
  background: var(--c-surface-alt); border: 1px solid var(--c-border);
  border-radius: var(--radius-sm); padding: 14px; text-align: center;
}
.result-label { display: block; font-size: 0.78rem; color: var(--c-text-muted); margin-bottom: 4px; }
.result-value { font-size: 1.4rem; font-weight: 700; color: var(--c-primary); }
.result-highlight { grid-column: 1 / -1; background: #E8F5EE; border-color: var(--c-accent-light); }
.result-highlight .result-value { color: var(--c-primary-hover); font-size: 1.8rem; }

.result-breakdown { margin-bottom: 20px; }
.result-breakdown h3 { font-size: 0.95rem; margin-bottom: 10px; color: var(--c-text-muted); }
.plan-list { display: flex; flex-direction: column; gap: 6px; }
.plan-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px; background: var(--c-surface-alt);
  border-radius: var(--radius-sm); font-size: 0.88rem;
}
.plan-item-name { font-weight: 600; }
.plan-item-detail { color: var(--c-text-muted); font-size: 0.82rem; }

.result-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.toast {
  margin-top: 12px; padding: 10px 14px;
  background: #E8F5EE; border: 1px solid var(--c-accent-light);
  border-radius: var(--radius-sm); font-size: 0.88rem;
  color: var(--c-primary); display: none;
}
.toast.show { display: block; }

/* Example section */
.example { padding: 48px 0; background: var(--c-surface); border-top: 1px solid var(--c-border); }
.example h2 { font-size: 1.4rem; margin-bottom: 16px; }
.example > .container > p { color: var(--c-text-muted); max-width: 680px; margin-bottom: 28px; }
.example-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.example-card {
  background: var(--c-bg); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 20px;
}
.example-card h3 { font-size: 1rem; margin-bottom: 10px; }
.example-card ul { padding-left: 18px; color: var(--c-text-muted); font-size: 0.92rem; }
.example-card li { margin-bottom: 4px; }
.example-card p { color: var(--c-text-muted); font-size: 0.92rem; }

/* Guide section */
.guide { padding: 48px 0; }
.guide h2 { font-size: 1.4rem; margin-bottom: 24px; }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 36px; }
.guide-block {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 20px;
}
.guide-block h3 { font-size: 1rem; margin-bottom: 8px; }
.guide-block p { color: var(--c-text-muted); font-size: 0.92rem; }
.assumptions, .mistakes, .faq { margin-bottom: 32px; }
.assumptions h3, .mistakes h3, .faq h3 { font-size: 1.1rem; margin-bottom: 12px; }
.assumptions ul, .mistakes ul { padding-left: 20px; color: var(--c-text-muted); font-size: 0.92rem; }
.assumptions li, .mistakes li { margin-bottom: 6px; }
.faq dl { display: flex; flex-direction: column; gap: 14px; }
.faq dt { font-weight: 600; font-size: 0.95rem; }
.faq dd { color: var(--c-text-muted); font-size: 0.92rem; margin-top: 4px; }

/* Footer */
.site-footer {
  margin-top: auto; background: var(--c-surface);
  border-top: 1px solid var(--c-border); padding: 32px 0;
}
.footer-inner { display: flex; flex-direction: column; gap: 8px; }
.footer-brand { font-weight: 700; font-size: 1rem; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; font-size: 0.88rem; }
.footer-note, .footer-updated { font-size: 0.82rem; color: var(--c-text-muted); }

/* Responsive */
@media (max-width: 900px) {
  .worksheet-grid { grid-template-columns: 1fr; }
  .panel-results { position: static; }
  .example-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .header-inner { height: 56px; }
  .logo-text { font-size: 0.95rem; }
  .site-nav { gap: 12px; font-size: 0.85rem; }
  .hero { padding: 40px 0 32px; }
  .hero h1 { font-size: 1.5rem; }
  .hero-sub { font-size: 1rem; }
  .panel { padding: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .results { grid-template-columns: 1fr 1fr; }
  .result-actions { flex-direction: column; }
  .result-actions .btn { width: 100%; }
}

/* Print */
@media print {
  .site-header, .site-footer, .hero-actions, .presets, .result-actions, .toast { display: none !important; }
  .worksheet-grid { display: block; }
  .panel { box-shadow: none; border: 1px solid #ccc; }
  body { background: #fff; color: #000; }
}



/* 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;
}