body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

.hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
}

.hero h1 {
  margin: 0;
  font-size: 42px;
}

.hero p {
  margin-top: 10px;
  opacity: 0.7;
}

.configurator {
  display: flex;
  justify-content: center;
  padding: 40px 20px;
}

.card {
  background: #1e293b;
  padding: 30px;
  border-radius: 14px;
  width: 100%;
  max-width: 1100px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 15px;
  margin-bottom: 25px;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 14px;
}

input, select {
  padding: 8px;
  margin-top: 5px;
  border-radius: 6px;
  border: none;
}

button.primary {
  background: #3b82f6;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

ul {
  padding-left: 20px;
}

footer {
  text-align: center;
  padding: 20px;
  opacity: 0.5;
}