:root {
  --ink: #222;
  --muted: #666;
  --border: #dcdcdc;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --danger: #d9472b;
  --bg: #f7f7f8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
.wrap { max-width: 480px; margin: 0 auto; padding: 16px 16px 40px; }
header.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; background: #fff; border-bottom: 1px solid var(--border);
}
header.topbar a.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
header.topbar a.logout { color: var(--muted); text-decoration: none; font-size: 14px; }
h1 { font-size: 20px; margin: 18px 0 10px; }
.muted { color: var(--muted); font-size: 14px; }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; margin-bottom: 14px;
}
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
input[type=text], input[type=email], input[type=password], input[type=search] {
  width: 100%; padding: 11px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 16px; margin-bottom: 12px;
}
input[type=file] { margin-bottom: 10px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff; border: none;
  padding: 12px 16px; border-radius: 8px; font-size: 16px; font-weight: 600;
  text-decoration: none; text-align: center; cursor: pointer;
}
.btn:hover { background: var(--accent-dark); }
.btn-block { display: block; width: 100%; }
.btn-secondary { background: #fff; color: var(--ink); border: 1px solid var(--border); }
.btn-sm { padding: 8px 12px; font-size: 14px; }
.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.alert-error { background: #fdecea; color: #a3281a; border: 1px solid #f3c2ba; }
.alert-success { background: #eafaf0; color: #1a7a3d; border: 1px solid #b9e8c9; }
.alert-info { background: #eaf2fd; color: #1d4ed8; border: 1px solid #bcd6f8; }
.pill { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border);
  border-radius: 999px; padding: 8px 14px; font-weight: normal; margin-right: 8px; }
.receipt-toggle { display: flex; margin-bottom: 4px; }
.sig-wrap { border: 1px solid var(--border); border-radius: 8px; background: #fafafa; }
.sig-canvas { width: 100%; height: 180px; display: block; touch-action: none; }
.invoice-item {
  display: block; border: 1px solid var(--border); border-radius: 10px; padding: 14px;
  margin-bottom: 10px; text-decoration: none; color: var(--ink); background: #fff;
}
.invoice-item .num { font-weight: 700; }
.invoice-item .cust { color: var(--muted); font-size: 14px; }
.invoice-item .badge {
  display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 999px;
  background: #eafaf0; color: #1a7a3d; margin-top: 6px;
}
.badge-delivered { background: #eee; color: var(--muted); }
.badge-paid { background: #eaf2fd; color: #1d4ed8; }