#main {
    display: grid;
    grid-template-areas: 
    "header header header header"
    "display display display history"
    "days days days .";
    width: 80%;
    grid-gap: 5px;
    margin-left: auto;
    margin-right: auto;
    z-index: 5;
    position: relative;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; /* CHANGED THIS */
}

#header {
    grid-area: header;
    display: grid;
    grid-template-areas: 
    "h1"
    "error"
    "search";
    background-color:rgba(255,255,255,0.4);; /* CHANGED THIS */
    border: 5px solid skyblue; /* CHANGED THIS */
    text-align: center;
    border-radius: 10px;
}

#header h1 {
    grid-area: h1;
}

#error {
    grid-area: error;
    color: red;
    font-weight: bold;
    margin-bottom: 5px;
}

#weather-search {
    grid-area: search;
    margin-bottom: 15px;
}

#display-content {
    grid-area: display;
    background-color: rgba(255,255,255,0.4); /* CHANGED THIS */
    border: 5px solid skyblue; /* CHANGED THIS */
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
}

#history-content {
    grid-area: history;
    border: 5px solid skyblue; /* CHANGED THIS */
    border-radius: 10px; /* CHANGED THIS */
    background-color: rgba(255,255,255,0.4); /* CHANGED THIS */
}

a {
    font-weight: 600; /* ADDED THIS */
}

#three-days {
    grid-area: days;
    display: grid;
    grid-template-areas: 
    'today tomorrow after-tomorrow';
    border-radius: 10px; /* CHANGED THIS */
    background-color: rgba(255,255,255,0.4); /* CHANGED THIS */
}

#today, #tomorrow, #after-tomorrow {
    margin: 15px; /* CHANGED THIS */
}

#today {
    grid-area: today;
    text-align: center;
}

#tomorrow {
    grid-area: tomorrow;
    text-align: center;
    border-right: 5px solid skyblue;/* CHANGED THIS */
    border-left: 5px solid skyblue;/* CHANGED THIS */
}

#after-tomorrow {
    grid-area: after-tomorrow;
    text-align: center;
}

@keyframes move-background {
    from {
          -webkit-transform: translate3d(0px, 0px, 0px);
      }
      to { 
          -webkit-transform: translate3d(1000px, 0px, 0px);
      }
  }

@-webkit-keyframes move-background {
	from {
		-webkit-transform: translate3d(0px, 0px, 0px);
	}
	to { 
		-webkit-transform: translate3d(1000px, 0px, 0px);
	}
}

/* UPDATE EVERYTHING BELOW THIS COMMENT */
.dark-clouds {
    width:10000px;
    height: 100%;
    background: transparent url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/1231630/clouds_repeat.png") repeat;
    background-size: 1000px 1000px;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 0;

    -moz-animation:move-background 150s linear infinite;
    -ms-animation:move-background 150s linear infinite;
    -o-animation:move-background 150s linear infinite;
    -webkit-animation:move-background 150s linear infinite;
    animation:move-background 150s linear infinite;
}

#rain {
    width:10000px;
    height: 100%;
    background: transparent url("https://i.gifer.com/2ii5.gif") repeat;
    background-size: 1000px 1000px;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 3;

    -moz-animation:move-background 150s linear infinite;
    -ms-animation:move-background 150s linear infinite;
    -o-animation:move-background 150s linear infinite;
    -webkit-animation:move-background 150s linear infinite;
    animation:move-background 150s linear infinite;
}

#cloudy {
    width:10000px;
    height: 100%;
    background: transparent url("https://c.tenor.com/YhQV3T7bjXwAAAAC/heaven-cloud.gif");
    background-size: 2000px 2000px;
    /* background-size: cover; */
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 3;
}

#sunny {
    width:10000px;
    height: 100%;
    background: transparent url("https://64.media.tumblr.com/22314b41aac207dc747922c2ffa775d9/tumblr_inline_oubzzjMUgT1sltmlu_500.gifv");
    background-size: 2000px 2000px;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 3;
}

#snow {
    width:10000px;
    height: 100%;
    background: transparent url("https://i.gifer.com/origin/d2/d2faff75e02534a3c687da2b7c4a95ab.gif") repeat;
    background-size: 1000px 1000px;
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 3;

    -moz-animation:move-background 150s linear infinite;
    -ms-animation:move-background 150s linear infinite;
    -o-animation:move-background 150s linear infinite;
    -webkit-animation:move-background 150s linear infinite;
    animation:move-background 150s linear infinite;
}