body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f7fafc;
  color: #222;
  margin: 0;
  padding: 0;
}

header {
  background: #fff;
  padding: 2rem 1rem 1rem 1rem;
  text-align: center;
  box-shadow: 0 2px 8px #e3e7ed60;
}

.subtitle {
  color: #4a90e2;
  font-size: 1.2rem;
  margin-top: .5rem;
}

section {
  margin: 2rem auto;
  max-width: 700px;
  background: #fff;
  border-radius: 10px;
  padding: 2rem 1.5rem;
  box-shadow: 0 2px 8px #e3e7ed30;
}

.benefits ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
}

.benefits li {
  margin-bottom: .7rem;
  font-size: 1.1rem;
}

.plans {
  text-align: center;
}

.plan-cards {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.plan-card {
  background: #f4faff;
  border: 2px solid #e3e7ed;
  border-radius: 10px;
  padding: 1.5rem 1rem;
  width: 220px;
  box-shadow: 0 1px 6px #e3e7ed40;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: border .2s, box-shadow .2s;
}

.plan-card.destaque {
  border: 2px solid #4a90e2;
  box-shadow: 0 2px 12px #4a90e230;
  background: #eaf6ff;
}

.plan-card h3 {
  margin: 0 0 .7rem 0;
  color: #4a90e2;
}

.price {
  font-size: 1.4rem;
  color: #2ecc71;
  font-weight: bold;
  margin: .7rem 0;
}

.choose-plan {
  background: #4a90e2;
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: .6rem 1.2rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background .2s;
}

.choose-plan:hover {
  background: #357ab8;
}

.testimonials blockquote {
  background: #f4faff;
  border-left: 5px solid #4a90e2;
  margin: 1rem 0;
  padding: 1rem 1rem 1rem 2rem;
  font-style: italic;
  border-radius: 5px;
}

.testimonials cite {
  display: block;
  margin-top: .5rem;
  color: #888;
  font-size: .95rem;
}

footer {
  text-align: center;
  padding: 2rem 0 1rem 0;
  background: #fff;
  color: #4a90e2;
  font-size: 1rem;
  border-top: 1px solid #e3e7ed;
}

footer a {
  color: #2ecc71;
  text-decoration: none;
  font-weight: bold;
}

.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #0004;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal-content {
  background: #fff;
  border-radius: 10px;
  padding: 2rem 1.5rem;
  min-width: 300px;
  max-width: 400px;
  position: relative;
  box-shadow: 0 2px 16px #4a90e220;
}

#close-modal {
  position: absolute;
  top: 12px;
  right: 18px;
  font-size: 1.5rem;
  color: #4a90e2;
  cursor: pointer;
}

#checkout-form input {
  width: 100%;
  padding: .5rem;
  margin: .3rem 0 1rem 0;
  border: 1px solid #e3e7ed;
  border-radius: 6px;
  font-size: 1rem;
  background: #f7fafc;
}

#checkout-form button[type="submit"] {
  background: #2ecc71;
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: .7rem 1.5rem;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background .2s;
}

#checkout-form button[type="submit"]:hover {
  background: #27ae60;
}

#checkout-result {
  margin-top: 1rem;
  font-weight: bold;
  text-align: center;
}