#modalpreview {
  width: 100%;
  display: none;
  height: 100vh;
  justify-content: center;
  align-items: center;
  background: #fff;
  position: fixed;
  top: 0;
  -webkit-transition: 0.5s ease;
  transition: 0.5s ease;
  z-index: 100;
}

@media (max-width: 600px) {
  #modalpreview {
    max-width: 100%;
    height: auto;
  }
}

#modalpreview main {
  position: relative;
  background: #fff;
  display: flex;
  max-width: 1060px;
  height: 458px;
  background: url("../img/proporcao_obra.jpg") no-repeat;
  margin: 100px auto;
}

#modalpreview img {
  position: absolute;
  box-shadow: 2px 3px 3px #999;
}

/* @media (max-width: 600px) {
  #modalpreview main {
    display: block;
    max-width: 100%;
    height: auto;
  }
} */

#modalpreview .close {
  font-size: 50px;
  position: absolute;
  top: 20px;
  right: 20px;
  display: inline-block;
  z-index: 2;
}

#modalpreview.visible {
  display: flex;
  -webkit-transition: 0.5s ease;
  transition: 0.5s ease;
}