html, body {
  margin: 0;
  height: 100%;
  width: 100%;
}

.bg {
  width: 100%;
  height: 70vh;
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 2em;
}

.bg1 {
  background-image: url("./1.jpg");
}

.bg2 {
  background-image: url("./2.webp");
}

.bg3 {
  background-image: url("./3.jpeg");
}

.content {
  width: 100%;
  height: 30vh;
  padding: 0 100px;
  background-color: #333;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  line-height: 30px;
}

.content h3 {
  font-size: 2.5em;
}

.content.footer {
  height: 50vh;
}