.existing-customer-upgrade {
  padding: 0 0 clamp(3rem, 7vw, 5.5rem);
}

.existing-customer-upgrade-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid #d9e6e4;
  border-radius: 22px;
  background:
    radial-gradient(circle at 90% 10%, rgba(33, 151, 133, 0.1), transparent 38%),
    #f8fbfa;
  box-shadow: 0 16px 45px rgba(20, 61, 72, 0.08);
}

.existing-customer-upgrade-copy > span {
  display: inline-block;
  margin-bottom: 0.55rem;
  color: #147d70;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.existing-customer-upgrade-copy h2 {
  margin: 0;
  color: #112f3a;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.15;
}

.existing-customer-upgrade-copy p {
  max-width: 590px;
  margin: 0.85rem 0 0;
  color: #51656b;
  line-height: 1.65;
}

.existing-customer-upgrade-form {
  padding: 1.15rem;
  border: 1px solid #d7e4e2;
  border-radius: 16px;
  background: #fff;
}

.existing-customer-upgrade-form label {
  display: block;
  margin-bottom: 0.5rem;
  color: #203c45;
  font-size: 0.88rem;
  font-weight: 750;
}

.existing-customer-upgrade-controls {
  display: flex;
  gap: 0.65rem;
}

.existing-customer-upgrade-controls input {
  min-width: 0;
  flex: 1;
  min-height: 48px;
  padding: 0.75rem 0.9rem;
  border: 1px solid #b8cbc8;
  border-radius: 10px;
  color: #17333d;
  font: inherit;
}

.existing-customer-upgrade-controls input:focus {
  border-color: #147d70;
  outline: 3px solid rgba(20, 125, 112, 0.14);
}

.existing-customer-upgrade-controls .button {
  min-height: 48px;
  white-space: nowrap;
}

.existing-customer-upgrade-privacy {
  display: block;
  margin-top: 0.55rem;
  color: #738388;
  font-size: 0.76rem;
  line-height: 1.45;
}

.existing-customer-upgrade-result {
  margin: 0.85rem 0 0;
  padding: 0.8rem 0.9rem;
  border-radius: 10px;
  background: #f1f6f5;
  color: #3f565d;
  font-size: 0.88rem;
  line-height: 1.5;
}

.existing-customer-upgrade-result[data-type="success"] {
  border: 1px solid #b7dfd7;
  background: #eaf8f4;
  color: #155f54;
}

.existing-customer-upgrade-result[data-type="error"] {
  border: 1px solid #f1c8c5;
  background: #fff2f1;
  color: #9a3932;
}

.existing-customer-upgrade-result strong,
.existing-customer-upgrade-result span {
  display: block;
}

.existing-customer-upgrade-result a {
  display: inline-flex;
  margin-top: 0.65rem;
  color: #0c6d61;
  font-weight: 800;
}

.existing-customer-home-note {
  padding: 0 0 clamp(2rem, 5vw, 3.5rem);
}

.existing-customer-home-link {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.05rem;
  border: 1px solid #d7e4e2;
  border-radius: 12px;
  background: #f8fbfa;
  color: #50656b;
  font-size: 0.88rem;
  text-decoration: none;
}

.existing-customer-home-link strong,
.existing-customer-home-link > span:last-child {
  color: #0c7568;
  font-weight: 800;
}

.checkout-loyalty-result {
  display: block;
  margin-top: 0.75rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid #d7e4e2;
  border-radius: 10px;
  background: #f8fbfa;
  color: #50656b;
  font-size: 0.82rem;
  line-height: 1.5;
}

.checkout-loyalty-result[hidden] {
  display: none !important;
}

.checkout-loyalty-result strong,
.checkout-loyalty-result span {
  display: block;
}

.checkout-loyalty-result[data-type="success"] {
  border-color: #a8d9cf;
  background: #eaf8f4;
  color: #155f54;
}

.checkout-loyalty-result[data-type="error"] {
  border-color: #ead6b6;
  background: #fff9ed;
  color: #73551e;
}

.checkout-loyalty-result button {
  min-height: 42px;
  margin-top: 0.65rem;
  padding: 0.6rem 0.85rem;
  border: 0;
  border-radius: 9px;
  background: #0c7568;
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.checkout-loyalty-result button:hover {
  background: #095f55;
}

@media (max-width: 760px) {
  .existing-customer-upgrade-card {
    grid-template-columns: 1fr;
    border-radius: 16px;
  }

  .existing-customer-upgrade-controls {
    flex-direction: column;
  }

  .existing-customer-upgrade-controls .button {
    width: 100%;
  }

  .existing-customer-home-link {
    display: grid;
    gap: 0.3rem;
    font-size: 0.84rem;
  }

  .checkout-loyalty-result {
    font-size: 0.84rem;
  }

  .checkout-loyalty-result button {
    width: 100%;
  }
}