:root {
  --bill-font-family: 'Courier New', Courier, monospace;
  --bill-font-size: 11px;
  --bill-bg: #fff;
  --bill-text: #000;
  --bill-border: #000;
  --bill-padding: 40px;
}

body {
  margin: 0;
  padding: 0;
  background-color: #f0f0f0;
  font-family: var(--bill-font-family);
  font-size: var(--bill-font-size);
  color: var(--bill-text);
}

.document-container {
  width: 210mm; /* A4 Width */
  margin: 20px auto;
  background-color: var(--bill-bg);
  padding: var(--bill-padding);
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  box-sizing: border-box;
  min-height: 297mm;
}

.header {
  text-align: center;
  margin-bottom: 20px;
}

.header h1 {
  font-size: 18px;
  margin: 0 0 5px 0;
  text-transform: uppercase;
  font-weight: bold;
}

.header h2 {
  font-size: 13px;
  margin: 0 0 5px 0;
  font-weight: bold;
}

.header p {
  margin: 2px 0;
  font-size: 11px;
}

.bill-title {
  text-align: center;
  margin: 15px 0;
}

.bill-title h3 {
  font-size: 16px;
  margin: 5px 0;
  text-decoration: underline;
  text-transform: capitalize;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
  margin-bottom: 20px;
}

.info-row {
  display: flex;
  margin-bottom: 3px;
  line-height: 1.2;
}

.info-label {
  width: 130px;
  font-weight: bold;
  flex-shrink: 0;
}

.info-colon {
  width: 15px;
  flex-shrink: 0;
}

.info-value {
  flex-grow: 1;
}

.section-title {
  font-weight: bold;
  font-size: 13px;
  border-bottom: 1px solid var(--bill-border);
  margin: 15px 0 5px 0;
  padding-bottom: 2px;
}

.bill-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 10px;
}

.bill-table th {
  text-align: left;
  border-top: 1px solid var(--bill-border);
  border-bottom: 1px solid var(--bill-border);
  padding: 4px 2px;
  font-weight: bold;
}

.bill-table td {
  padding: 3px 2px;
  vertical-align: top;
}

.text-right {
  text-align: right;
}

.bold {
  font-weight: bold;
}

.indent {
  padding-left: 15px;
}

.footer {
  margin-top: 20px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--bill-border);
  padding-top: 5px;
}

.page-num {
  text-align: right;
  margin-top: 10px;
}

@media print {
  body {
    background-color: #fff;
  }
  .document-container {
    margin: 0;
    box-shadow: none;
    width: 100%;
  }
}