body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f7f9fc;
  margin: 0;
  padding: 0;
  color: #333;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}
h1 {
  text-align: center;
  margin-bottom: 30px;
}
section {
  background-color: #fff;
  padding: 15px 20px;
  margin-bottom: 20px;
  border-radius: 10px;
  box-shadow: 0 0 5px rgba(0,0,0,0.05);
}
textarea, input {
  width: 100%;
  padding: 10px;
  margin: 5px 0 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-family: monospace;
  resize: vertical;
}
button {
  background-color: #007bff;
  color: white;
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 10px;
}
button:hover {
  background-color: #0056b3;
}
.list-wrap {
  display: flex;
  gap: 20px;
}
.multi-col {
  column-count: 2;
  column-gap: 16px;
  max-height: 400px;
  overflow-y: auto;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  background: #fdfdfd;
  list-style: none;
}
.multi-col li {
  break-inside: avoid;
  background: #f4f6fa;
  padding: 6px 10px;
  margin-bottom: 6px;
  border-radius: 6px;
  box-shadow: 0 0 1px rgba(0,0,0,0.1);
}
.multi-col-checkbox {
  column-count: 2;
  column-gap: 16px;
  max-height: 300px;
  overflow-y: auto;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  background: #f9f9f9;
}
.checkbox-label {
  display: block;
  margin-bottom: 5px;
  white-space: nowrap;
}