* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background-image: url(img/ft1.jpg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

.row {
  width: 100%;
  max-width: 500px;
  margin-right: auto;
  text-align: center;
  padding-top: 5%;
  padding-left: 4%;
}

a {
  display: block;
  width: 100%;
}

.logo img {
  width: 100%;
  max-width: 90%;
}

.btn {
  padding-top: 30px;
}

.btn img {
  width: 100%;
  max-width: 350px;
}

@media screen and (max-width: 1400px) {
  .btn img {
    max-width: 400px;
  }

  .logo img {
    width: 100%;
    max-width: 60%;
  }
}

@media all and (max-width: 460px) {
  .logo img {
    width: 100%;
    max-width: 200px;
  }

  .btn img {
    width: 200px;
  }
}