h1 {
  font-size: 2rem;
  margin-bottom: 0.5em;
  color: #2d3748;
  text-align: center;
}

p {
  text-align: center;
  color: #718096;
  margin-bottom: 2em;
}

form {
  display: flex;
  justify-content: center;
  gap: 2em;
  margin-bottom: 2em;
  flex-wrap: wrap;
}

form div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

form label {
  font-weight: 600;
  margin-bottom: 0.3em;
  color: #4a5568;
}

form input,
form select {
  padding: 0.4em 0.8em;
  border: 1px solid #cbd5e0;
  border-radius: 4px;
  font-size: 1em;
  background: #f7fafc;
}

form input[type="submit"] {
  background: #3182ce;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
  margin-top: 1.2em;
}

form input[type="submit"]:hover {
  background: #2b6cb0;
}

.table-sales-container {
  display: flex;
  justify-content: center;
  margin-top: 2em;
}

.table-sales {
  border-collapse: collapse;
  width: 100%;
  max-width: 600px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
  border-radius: 8px;
  overflow: hidden;
}

.table-sales th,
.table-sales td {
  padding: 1em;
  text-align: left;
}

.table-sales th {
  background: #f1f5f9;
  color: #2d3748;
  font-weight: 700;
}

.table-sales tbody tr:nth-child(even) {
  background: #f7fafc;
}

.table-sales td strong {
  color: #38a169;
  font-size: 1.1em;
}