* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

.container {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 250px;
  background: #1f2937;
  color: white;
  padding: 20px;
}

.sidebar h2 {
  margin-bottom: 30px;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  padding: 12px;
  cursor: pointer;
}

.sidebar li:hover {
  background: #374151;
}

.content {
  flex: 1;
  padding: 20px;
  background: #f5f5f5;
}

.topbar {
  margin-bottom: 20px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 10px;
}

.sales-section {
  background: white;
  margin-top: 30px;
  padding: 20px;
  border-radius: 10px;
}

.search {
  width: 100%;
  padding: 10px;
  margin: 15px 0;
}

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

th,
td {
  padding: 12px;
  border-bottom: 1px solid #ddd;
}

.pay-btn {
  margin-top: 20px;
  padding: 12px 20px;
  border: none;
  background: #2563eb;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}