* {
    box-sizing: border-box;
}


body {
    margin: 10px;
    background-color:darkgray;
    transition: background-color .5s;
}

body.day{
    background-color: skyblue;
}

body.dark{
    background-color: darkslategray;
}

body.fall{
    background-color:lightblue
}

body.winter{
    background-color: gray;
}



.active {
    right:0;
}

button {
    padding: 10px;
    border:1px solid;
    cursor: pointer;
    background-color: azure; 
    border-radius: 5px;
    transition: right .2s;
}

button:hover {
    background-color:darkgray
}

button:active {
    background-color: antiquewhite;
}




.sun{
    position: absolute;
    top:150px;
    left:200px;
    height: 50px;
    width: 50px;
    background-color: slategray;
    border: 1px solid;
    transition: transform 1s;
    animation-play-state: paused;
    transition: background-color 1s, box-shadow 1s; 
}

.sun.day{
    background-color: yellow;
    box-shadow: 0 0 10px 5px yellow;
}

.sun.dark{
    background-color: azure;
    box-shadow: 0 0 10px 5px azure;
}

.sun.fall{
    background-color: yellow;
    box-shadow: 0 0 10px 5px yellow;
}

.sun.winter{
    background-color: orange;
    box-shadow: 0 0 10px 5px orange;
}




.grass{
    position: absolute;
    top: 600px;
    right:0px;
    height: 200px;
    width: 1700px;
    background-color: slategray;
    border: 1px solid;
    transition: transform 1s;
    animation-play-state: paused;
    transition: background-color 1s, box-shadow 1s; 
}

.grass.day{
    background-color: green;
}

.grass.dark{
    background-color:darkgreen;
}

.grass.fall{
    background-color: orange;
}

.grass.winter{
    background-color: azure;
}


.trunk{
    position: absolute;
    bottom:130px;
    right:700px;
    height: 400px;
    width: 60px;
    background-color:slategray;
    border: 1px solid;
    transition: transform 1s;
    animation-play-state: paused;
    transition: background-color 1s, box-shadow 1s; 
}

.trunk.day{
    background-color: chocolate;
}

.trunk.dark{
    background-color:rgb(109, 55, 16);
}

.trunk.fall{
    background-color: darkgoldenrod;
}

.trunk.winter{
    background-color: black;
}





.circle{
    position: absolute;
  background-color: slategray;
  left: -170px;
  top: -150px;
  width: 400px;
  height: 300px;
  border-radius: 60%;
  animation-play-state: paused;
  transition: background-color 1s, box-shadow 1s;
}

.circle.day{
    background-color: greenyellow;
}

.circle.dark{
    background-color: darkolivegreen;
}

.circle.fall{
    background-color: brown;
}

.circle.winter{
    background-color: gray;
}




.rain{
    position: absolute;
    width: 3500px;
    right: 0px;
    top: 150px;
    opacity: 0;
    transition: opacity 1s;
}