* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(180deg, #08111f, #0d1a2d);
  color: #f4f1ea;
}

.page-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 20px 80px;
}

.page-header {
  margin-bottom: 40px;
}

.page-header h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

.page-header p {
  font-size: 18px;
  color: #c0cad8;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.package-card {
  background: rgba(20, 30, 50, 0.85);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 22px;
  padding: 28px;
}

.package-card.featured {
  border: 1px solid #f4b400;
  box-shadow: 0 0 25px rgba(244,180,0,0.15);
}

.package-card h2 {
  margin-top: 0;
  font-size: 30px;
}

.price {
  font-size: 34px;
  font-weight: 800;
  margin: 14px 0;
}

.select-btn,
.select-software-btn,
#addMaintenanceBtn,
#removeMaintenanceBtn,
.buy-btn,
.next-link {
  display: inline-block;
  background: #f4b400;
  color: #111;
  border: none;
  border-radius: 12px;
  padding: 14px 22px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.page-actions {
  margin-top: 35px;
}

.single-card-wrap {
  max-width: 500px;
}

.wartung-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.checkout-box {
  max-width: 700px;
  background: rgba(20, 30, 50, 0.9);
  border-radius: 24px;
  padding: 30px;
  border: 1px solid rgba(255,255,255,0.08);
}

.checkout-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.final-row strong {
  font-size: 28px;
  color: #f4b400;
}

hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.12);
  margin: 22px 0;
}

@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .page-header h1 {
    font-size: 34px;
  }
}