:root {
  --bg: #f4f6f8;
  --fg: #1d2939;
  --muted: #667085;
  --accent: #1d6f9c;
  --danger: #b42318;
  --success: #027a48;
  --warning: #b54708;
  --card: #ffffff;
  --border: #d0d5dd;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
}
header {
  display: flex;
  align-items: center;
  gap: 2em;
  padding: 0.75em 1.5em;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 1.25em; }
nav { display: flex; gap: 0.5em; flex: 1; }
nav button {
  background: transparent;
  border: 1px solid transparent;
  padding: 0.35em 0.9em;
  border-radius: 6px;
  cursor: pointer;
  color: var(--muted);
  font: inherit;
}
nav button.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
nav button:hover:not(.active) { background: #eef4f7; color: var(--fg); }
#user-bar { color: var(--muted); font-size: 0.9em; }
#user-bar button {
  margin-left: 0.5em;
  background: none;
  border: 1px solid var(--border);
  padding: 0.3em 0.6em;
  border-radius: 4px;
  cursor: pointer;
}

main { padding: 1.5em; max-width: 1280px; margin: 0 auto; }

table { width: 100%; border-collapse: collapse; background: var(--card); box-shadow: 0 1px 2px rgba(0,0,0,0.04); border-radius: 8px; overflow: hidden; }
th, td { padding: 0.6em 0.9em; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f9fafb; color: var(--muted); font-size: 0.85em; font-weight: 600; }
tr:last-child td { border-bottom: none; }
tr.row-clickable { cursor: pointer; }
tr.row-clickable:hover { background: #f9fafb; }

.error {
  background: #fef3f2;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 0.7em 1em;
  border-radius: 6px;
  margin-bottom: 1em;
}

.badge {
  display: inline-block;
  padding: 0.15em 0.55em;
  border-radius: 999px;
  font-size: 0.8em;
  font-weight: 500;
}
.badge.pending_review { background: #eef4f7; color: var(--accent); }
.badge.pending_review_low_confidence { background: #fff8e1; color: var(--warning); }
.badge.already_in_bill { background: #ecfdf3; color: var(--success); }
.badge.possible_match_hold { background: #fff8e1; color: var(--warning); }
.badge.customer_unknown { background: #fef3f2; color: var(--danger); }
.badge.exception { background: #fef3f2; color: var(--danger); }
.badge.submitted, .badge.submitted_pending_attachment { background: #ecfdf3; color: var(--success); }
.badge.held_by_ops { background: #f4f4f5; color: var(--muted); }
.badge.approval_dispatched { background: #eef4f7; color: var(--accent); }

dialog {
  border: none;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  padding: 1.5em;
  max-width: 720px;
}
dialog menu { padding: 0; display: flex; gap: 0.5em; justify-content: flex-end; }
button { font: inherit; padding: 0.45em 1em; border-radius: 6px; border: 1px solid var(--border); background: var(--card); cursor: pointer; }
button[value=hold], button#hold-btn { background: #fff8e1; border-color: #ec8413; color: var(--warning); }
button[value=cancel], button#close-btn { background: #f4f4f5; }
button#approve-btn, button#hold-submit { background: var(--success); color: white; border-color: var(--success); }

#invoice-detail dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.4em 1em; }
#invoice-detail dt { color: var(--muted); }
#invoice-detail dd { margin: 0; }
#invoice-detail a { color: var(--accent); }