body {
  font-family: Arial, sans-serif;
  background: #f6f9fb;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 600px;
  margin: 2rem auto;
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 3px 8px #e0e0e0;
}
h1 {
  text-align: center;
}
form label {
  display: block;
  margin: 1rem 0 0.5rem 0;
}
input[type="text"], input[type="date"], select, textarea {
  width: 100%;
  padding: 0.4rem;
  margin-bottom: 0.4rem;
}
.brand-table, table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
}
.brand-table th, table th, .brand-table td, table td {
  border: 1px solid #ddd;
  padding: 0.5rem;
}
button {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: #1976d2;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background: #115293;
}
#message {
  margin-top: 1rem;
  text-align: center;
}
.sales-summary-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

.sales-summary-table th, .sales-summary-table td {
  border: 1px solid #ccc;
  padding: 6px;
  text-align: center;
  font-size: 14px;
}

.sales-summary-table th {
  background-color: #f5f5f5;
}

.over {
  color: green;
  font-weight: bold;
}

.achieved {
  color: darkblue;
  font-weight: bold;
}

.under {
  color: red;
  font-weight: bold;
}