:root {
  --cor-principal: #333333;
  --fonte-principal: 'Segoe UI', sans-serif;
}

body {
  font-family: var(--fonte-principal);
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

h1, h2, h3, h4, h5 {
  font-weight: 600;
  color: var(--cor-principal);
}

header h1 {
  font-size: 2.5rem;
}

/* Header com imagens alternadas pelo JS */
header.hero {
  min-height: 500px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  position: relative;
  color: #fff;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-image 2s ease-in-out; /* efeito fade */
}

a.btn {
  transition: all 0.3s ease;
}

a.btn:hover {
  transform: scale(1.05);
}

.how-it-works h5 {
  margin-top: 10px;
  font-weight: bold;
  color: var(--cor-principal);
}

footer {
  font-size: 0.95rem;
}

footer h5 {
  font-size: 1.1rem;
}

#whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #25d366;
  color: white;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  z-index: 999;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .how-it-works .col-md-4 {
    margin-bottom: 2rem;
  }
}