body {
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  margin: 0;
}

.app {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

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

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

input {
  width: 100%;
  padding: 8px;
  margin: 5px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px;
}

button {
  padding: 10px 15px;
  margin-top: 10px;
  cursor: pointer;
}

.print-btn {
  background: #2d7ff9;
  color: white;
  border: none;
}

.invoice-preview {
  margin-top: 40px;
}

.invoice {
  background: white;
  padding: 30px;
  border: 1px solid #ccc;
}

.total {
  text-align: right;
}

/* Print Styles */
@media print {
  body {
    background: white;
  }

  .invoice-form {
    display: none;
  }

  .invoice {
    border: none;
  }
}