body {
  font-family: Arial, sans-serif;
  margin: 2rem;
  background-color: #f5f5f5;
}
header {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo {
  height: 50px;
}
form {
  background-color: #fff;
  padding: 1rem;
  border-radius: 8px;
  max-width: 500px;
}
label, select, input, button {
  display: block;
  width: 100%;
  margin-top: 1rem;
}
button {
  padding: 0.5rem;
  margin-top: 1rem;
}
#resultats {
  margin-top: 2rem;
  background: #e0ffe0;
  padding: 1rem;
  border-radius: 8px;
}