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

html, body {
  width: 100%;
  height: 100%;
}
.fondo {
  background-image: url("BUILD235.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.construccion {

     
  position: absolute;
 top: 280px;
  left: 670px;
  width: 450px;

  z-index: 2;

}





.popup {
  display: none; /* oculto por defecto */
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.6);
  z-index: 999;
  justify-content: center;
  align-items: center;
  font-family: 'Verdana', sans-serif;
}

.popup-window {
  background: #c0c0c0;
  border: 2px solid #fff;
  box-shadow: inset -2px -2px 0 #808080, inset 2px 2px 0 #fff, 2px 2px 0 #000;
  width: 320px;
}

.popup-header {
  background: #000080;
  color: white;
  padding: 4px 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
  font-size: 14px;
}

.popup-close {
  background: #c0c0c0;
  border: 2px outset #fff;
  width: 22px; height: 22px;
  font-size: 14px; line-height: 1;
  cursor: pointer;
  padding: 0;
}
.popup-close:hover { background: #ff8080; }

.popup-body {
  padding: 15px;
  background: #dfdfdf;
  border-top: 2px solid #fff;
  border-left: 2px solid #fff;
  border-right: 2px solid #808080;
  border-bottom: 2px solid #808080;
  font-size: 13px;
  color: black;
}

.popup-window.grande { width: 500px; height: auto; }

.popup-body.imagen {
  padding: 0;
  background: #fff;
  border: none;
  display: flex;
  justify-content: center;
  align-items: center;
}