:root {
  --bg: #0b0b0c;
  --card: #111114;
  --muted: #d0d5dd;
  --accent: #22c55e;
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 24px;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
  background: #f6f7f9; color: #111827;
}
.container {
  max-width: 980px; margin: 0 auto;
  background: white; padding: 24px; border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
}
h1 { margin-top: 0; }
fieldset {
  border: 1px solid #e5e7eb; border-radius: 12px; padding: 16px 16px 6px; margin: 16px 0;
}
legend { padding: 0 8px; color: #374151; font-weight: 600; }
label { display: block; margin-bottom: 10px; color: #374151; font-size: 14px; }
input[type="text"], input[type="number"], textarea {
  width: 100%; padding: 10px 12px; border: 1px solid #e5e7eb; border-radius: 10px;
  font-size: 14px; outline: none;
}
textarea { font-family: inherit; }
.grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.actions { margin-top: 16px; display:flex; justify-content:flex-end; }
button {
  background: #111827; color: white; border: none; padding: 10px 16px; border-radius: 10px;
  font-weight: 600; cursor: pointer;
}
button:hover { background: #0f172a; }
@media (max-width: 900px){
  .grid { grid-template-columns: 1fr; }
}