body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #eef6ff, #d9e9ff);
  color: #0f172a;
}

.kaart {
  width: min(90vw, 560px);
  padding: 2rem;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.15);
  text-align: center;
}

h1 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.6rem;
}

p {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: #334155;
}

.loader {
  width: 38px;
  height: 38px;
  margin: 0 auto;
  border: 4px solid #cbd5e1;
  border-top-color: #2563eb;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}