:root {
  --ink: #1c1f24;
  --ink-soft: #4b5259;
  --paper: #ffffff;
  --paper-soft: #f6f5f3;
  --line: #e4e1db;
  --accent: #c7754a;
  --accent-ink: #7a3f22;
  --accent-soft: #f5e3d8;
  --good: #2e7d5b;
  --good-soft: #e3f2ea;
  --warn: #b8860b;
  --warn-soft: #fbf1dc;
  --bad: #b3441f;
  --bad-soft: #fbe7de;
  --muted: #8a8f96;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(28, 31, 36, 0.06), 0 4px 16px rgba(28, 31, 36, 0.05);
  font-family: Arial, "Helvetica Neue", Helvetica, system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper-soft);
  color: var(--ink);
  line-height: 1.5;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding-inline: 20px;
}

a { color: var(--accent-ink); }

/* Header */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 18px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-ink));
  display: inline-block;
  flex-shrink: 0;
}
.brand-name { margin: 0; font-weight: 700; font-size: 1.05rem; }
.brand-tagline { margin: 0; color: var(--ink-soft); font-size: 0.85rem; }
.synthetic-badge {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* Intro */
.intro { padding-block: 32px 8px; max-width: 720px; }
.intro h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 12px; }
.intro-copy { color: var(--ink-soft); margin: 0; }

/* Scenario bar */
.scenario-bar { padding-block: 20px 8px; }
.scenario-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.scenario-tab {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
}
.scenario-tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.scenario-disclosure {
  margin: 12px 0 0;
  font-size: 0.85rem;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 10px 14px;
  display: none;
}
.scenario-disclosure.visible { display: block; }

/* Totals */
.totals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  padding-block: 20px;
}
.total-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.total-card .value { font-size: 1.6rem; font-weight: 800; margin: 0; }
.total-card .label { margin: 4px 0 0; color: var(--ink-soft); font-size: 0.82rem; }

/* Stores */
.stores-section { padding-block: 16px 8px; }
.stores-section h2, .how-it-works h2 { margin-bottom: 4px; }
.section-hint { color: var(--ink-soft); margin-top: 0; font-size: 0.9rem; }

.store-list { display: flex; flex-direction: column; gap: 10px; }
.store-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.store-summary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  flex-wrap: wrap;
}
.store-summary-left { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.store-name { font-weight: 700; }
.store-region { color: var(--muted); font-size: 0.85rem; }
.coverage-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.coverage-clean { background: var(--good-soft); color: var(--good); }
.coverage-flagged { background: var(--warn-soft); color: var(--warn); }
.coverage-partial { background: var(--warn-soft); color: var(--warn); }
.coverage-unavailable, .coverage-blocked { background: var(--bad-soft); color: var(--bad); }
.coverage-invalid { background: var(--bad-soft); color: var(--bad); }

.finding-list { border-top: 1px solid var(--line); display: none; }
.finding-list.open { display: block; }
.finding-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: none;
  border-left: none; border-right: none; border-bottom: none;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  flex-wrap: wrap;
}
.finding-row:first-child { border-top: none; }
.finding-row:hover { background: var(--paper-soft); }
.finding-sku { font-weight: 600; }
.finding-delta { font-variant-numeric: tabular-nums; font-weight: 700; }
.delta-zero { color: var(--good); }
.delta-negative { color: var(--bad); }
.delta-positive { color: var(--accent-ink); }
.delta-na { color: var(--muted); font-weight: 500; }

/* How it works */
.how-it-works { padding-block: 28px 40px; }
.how-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 12px; }
.how-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.how-card h3 { margin: 0 0 6px; font-size: 1rem; }
.how-card p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding-block: 20px; margin-top: 20px; }
.footer-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: 0.8rem; }
.build-meta { font-variant-numeric: tabular-nums; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(28, 31, 36, 0.55);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 24px 16px; overflow-y: auto; z-index: 50;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--paper); border-radius: var(--radius); max-width: 640px; width: 100%;
  padding: 24px; position: relative; box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.modal-close {
  position: absolute; top: 14px; right: 14px; border: none; background: none;
  font-size: 1.4rem; line-height: 1; cursor: pointer; color: var(--muted);
}
.modal h3 { margin: 0 0 4px; }
.modal .sub { color: var(--ink-soft); margin: 0 0 16px; font-size: 0.88rem; }

.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
@media (max-width: 520px) { .compare-grid { grid-template-columns: 1fr; } }
.compare-card { border-radius: var(--radius); padding: 14px; }
.compare-old { background: var(--bad-soft); border: 1px solid var(--bad); }
.compare-new { background: var(--good-soft); border: 1px solid var(--good); }
.compare-card h4 { margin: 0 0 8px; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; }
.compare-old h4 { color: var(--bad); }
.compare-new h4 { color: var(--good); }
.compare-line { display: flex; justify-content: space-between; font-size: 0.9rem; padding: 3px 0; }

.evidence-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.evidence-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.evidence-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
  padding: 3px 8px; border-radius: 999px; margin-bottom: 6px;
}
.tag-supported_observation { background: var(--good-soft); color: var(--good); }
.tag-hypothesis_supported { background: var(--accent-soft); color: var(--accent-ink); }
.tag-conflicting_evidence, .tag-insufficient_evidence { background: var(--warn-soft); color: var(--warn); }
.evidence-explain { margin: 0 0 6px; font-size: 0.92rem; }
.evidence-checks { margin: 0; padding-left: 18px; font-size: 0.85rem; color: var(--ink-soft); }

.raw-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.raw-table th, .raw-table td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--line); }
.raw-table th { color: var(--muted); font-weight: 600; }

@media (max-width: 640px) {
  .intro h1 { font-size: 1.35rem; }
  .store-summary, .finding-row { flex-direction: column; align-items: flex-start; }
}