body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b1220;
  color: #ffffff;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

header {
  background: #0f172a;
  padding: 15px 0;
  border-bottom: 1px solid #1e293b;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: bold;
  font-size: 20px;
  background: #2563eb;
  padding: 8px 12px;
  border-radius: 6px;
}

nav a {
  margin-left: 15px;
  text-decoration: none;
  color: #cbd5e1;
  font-weight: bold;
}

nav a:hover {
  color: #ffffff;
}

.hero {
  padding: 80px 0;
  text-align: center;
}

.section {
  padding: 60px 0;
}

h1, h2, h3 {
  margin-bottom: 20px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.card {
  background: #1e293b;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
}

input, textarea {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 6px;
  border: none;
}

.btn {
  display: inline-block;
  padding: 10px 15px;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
}

footer {
  background: #0f172a;
  padding: 20px 0;
  text-align: center;
  border-top: 1px solid #1e293b;
}

.whatsapp {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #25D366;
  color: #fff;
  padding: 10px 15px;
  border-radius: 50px;
  text-decoration: none;
}