html,
body {
  height: 100%;
}

body {
  max-height: 100%;
  background-image: url('1080.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
  margin: 0px;
}

@media (max-width: 600px) {
  body {
    background-image: url('bg.jpg');
  }
}

main {
  height: 100%;
}

.mycontainer {
  box-sizing: border-box;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  padding-left: 10vw;
  padding-top: 20vh;
}

@media (max-width: 600px) {
  .mycontainer {
    padding-left: 0;
    padding-top: 10vh;
    justify-content: flex-start;
    align-items: center;
  }
}


.logo-box {
  display: flex;
  align-items: center;
}

.logo-box .logo {
  display: inline-block;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  width: 417px;
  height: 139px;
  background-image: url('logo.png');
}

@media (max-width: 600px) {
  .logo-box .logo {
    width: 240px;
    height: 180px;
    background-image: url('logo-sm.png');
  }
}

.centered-div {
  padding-bottom: 100px;
  width: 500px;
  bottom: 6vh;
  left: auto;
  display: flex;
  align-items: center;
  justify-content: start;
  flex-wrap: wrap;
}

@media (max-width: 600px) {
  .centered-div {
    width: 300px;
    justify-content: center;
    align-items: center;
  }
}

.centered-div .ios-btn,
.centered-div .android-btn,
.centered-div .web-btn {
  display: inline-block;
  width: 240px;
  height: 100px;
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

.centered-div .ios-btn {
  background-image: url('ios-btn.png');
}

.centered-div .android-btn {
  background-image: url('android-btn.png');
}

.centered-div .web-btn {
  width: 280px;
  background-image: url('web-btn.png');
}

@media (max-width: 600px) {
  .centered-div .ios-btn,
  .centered-div .android-btn {
    width: 130px;
    height: 60px;
  }

  .centered-div .web-btn {
    width: 180px;
    height: 60px;
  }
}