body {
  font-family: "Segoe UI", sans-serif;
  margin: 0;
  background: #f5f7fa;
  color: #333;
}

header {
  background: #24292f;
  color: white;
  padding: 20px;
  text-align: center;
}

h1 {
  margin: 10px 0 5px;
}

.config {
  margin: 20px auto;
  text-align: center;
}

.config input {
  margin: 0 10px;
  padding: 5px;
}

button {
  padding: 6px 12px;
  background: #2ea44f;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #22863a;
}

.file-list {
  list-style: none;
  padding: 0;
  max-width: 800px;
  margin: 20px auto;
}

.file-list li {
  background: white;
  margin: 8px 0;
  padding: 12px;
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.file-list a {
  text-decoration: none;
  color: #0366d6;
  font-weight: bold;
}