* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}
.container {
  max-width: 640px;
  margin: 4rem auto;
  padding: 1.5rem;
}
h1 { margin-bottom: 0.25rem; }
.subtitle { color: #94a3b8; }
#download-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
input[type="url"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid #334155;
  border-radius: 8px;
  background: #1e293b;
  color: #fff;
}
button, .btn {
  padding: 0.75rem 1.25rem;
  background: #3b82f6;
  color: #fff;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
}
.result { margin-top: 1rem; padding: 1rem; background: #1e293b; border-radius: 8px; }
.result.error { border: 1px solid #f87171; }
.hidden { display: none; }
.legal { font-size: 0.85rem; color: #64748b; margin-top: 2rem; }