body {
  margin: 0;
  font-family: 'Montserrat', sans-serif;
  background: linear-gradient(to bottom, #ffffff, #f4f4f4);
  color: #222;
}
header {
  background-color: #222;
  color: #fff;
  padding: 2rem;
  text-align: center;
}
nav a {
  color: #fff;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}
section.hero {
  background: url('hero-placeholder.jpg') no-repeat center center/cover;
  height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  position: relative;
}
section.hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}
section.hero h1, section.hero p {
  z-index: 2;
}
section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: auto;
}
.btn {
  padding: 1rem 2rem;
  background-color: #d69c00;
  color: #fff;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
}
footer {
  background-color: #222;
  color: #fff;
  text-align: center;
  padding: 2rem;
}
iframe.chatbot {
  width: 100%;
  height: 600px;
  border: none;
}