body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial;
  background: linear-gradient(135deg, #e8f3ff, #faf7ff);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
  color: #333;
}

.card {
  background: white;
  padding: 40px 60px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  max-width: 450px;
  animation: fadeIn 1.2s ease;
}

h1 {
  font-size: 2.4rem;
  margin-bottom: 10px;
  font-weight: 700;
}

p {
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 24px;
  color: #555;
}

.btn {
  display: inline-block;
  background: #6b4dff;
  color: white;
  padding: 14px 26px;
  font-size: 1rem;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.25s;
  font-weight: 600;
}

.btn:hover {
  background: #5b3eef;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(107, 77, 255, 0.3);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

footer {
  position: absolute;
  bottom: 15px;
  font-size: 0.9rem;
  color: #777;
}