* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: #121212;
  color: #eee;
  font-family: 'Segoe UI', Tahoma, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  padding: 1rem;
}
.card {
  background: #1e1e1e;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.6);
  max-width: 480px;
  width: 100%;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
textarea, input[type="text"], select {
  width: 100%;
  padding: 0.75rem;
  border: none;
  border-radius: 8px;
  background: #2a2a2a;
  color: #fff;
  font-size: 1rem;
  resize: vertical;
}
select { appearance: none; cursor: pointer; }
.btn {
  padding: 0.75rem;
  border: none;
  border-radius: 8px;
  background: #3a3a3a;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
.btn:disabled { opacity: 0.5; cursor: default; }
.btn:hover:not(:disabled) { background: #505050; }
.btn-group { display: flex; gap: 0.5rem; }
#downloadLink {
  text-decoration: none;
  display: inline-block;
  text-align: center;
}