body {
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
  margin: 0;
}

.container {
  max-width: 1000px;
  margin: 2rem auto;
  display: grid;
  gap: 1.5rem;
}
.tool-card {
  background: #111827;
  padding: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
}
.tool-card h2 {
  margin-top: 0;
}
.tool-card input,
.tool-card select,
.tool-card textarea {
  width: 100%;
  margin: 0.25rem 0 0.75rem;
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid #374151;
  background: #020617;
  color: #e5e7eb;
}
.tool-card button {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: none;
  background: #22c55e;
  color: #022c22;
  font-weight: 600;
  cursor: pointer;
}
.tool-card button:hover {
  background: #16a34a;
}