body {
  font-family: Arial, sans-serif;
  background: #f7f9fb;
  margin: 0;
  padding: 20px;
}

.app-title {
  text-align: center;
  margin-bottom: 10px;
}

.ad-box {
  border: 1px solid #ccc;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aaa;
  margin-bottom: 20px;
}

.ad-box.small {
  height: 300px;
}

.container {
  display: flex;
  gap: 20px;
}

.invoice {
  background: #fff;
  padding: 20px;
  flex: 3;
  border-radius: 6px;
}

.side {
  flex: 1;
}

.header {
  display: flex;
  justify-content: space-between;
}

.logo-box {
  border: 1px dashed #ccc;
  padding: 20px;
}

.invoice-title {
  font-size: 28px;
  font-weight: bold;
}

.row {
  display: flex;
  gap: 10px;
  margin: 15px 0;
}

input {
  width: 100%;
  padding: 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: #0f1c3f;
  color: white;
  padding: 8px;
}

td {
  border: 1px solid #ddd;
  padding: 5px;
}

button {
  margin-top: 10px;
  padding: 10px;
  background: #42b883;
  color: white;
  border: none;
  cursor: pointer;
}

.totals {
  margin-top: 20px;
  text-align: right;
}