body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f7f7f7;
  color: #333;
}

header {
  background: #e0e0e0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo h1 {
  margin: 0;
}

nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #333;
  font-weight: bold;
}

.buton-suna {
  background: #00c0c0;
  padding: 8px 12px;
  border-radius: 5px;
  color: white;
}

.banner {
  background-image: url('banner.jpeg');
  background-size: cover;
  background-position: center;
  height: 90vh;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 2s;
}

.text-banner {
  background: rgba(255,255,255,0.7);
  padding: 30px;
  text-align: center;
}

.btn {
  margin-top: 15px;
  display: inline-block;
  background: #00c0c0;
  padding: 10px 20px;
  color: white;
  border-radius: 5px;
  text-decoration: none;
}

.intro {
  padding: 40px 20px;
  background: white;
}

footer {
  background: #e0e0e0;
  text-align: center;
  padding: 20px;
}

.call-button {
  display: none;
}

@media (max-width: 768px) {
  .call-button {
    display: block;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #00c0c0;
    padding: 15px;
    border-radius: 50%;
    color: white;
    text-align: center;
    font-size: 18px;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}