style.css

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

html,
body {
  height: 100%;
  width: 100%;
}

#main {
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#playground {
  height: 80%;
  width: 80%;
  background-color: transparent;
  border: 3px solid #000000;
  border-radius: 10px;
  overflow: hidden;
}

#playgroundTop {
  height: 80px;
  width: 100%;
  background-color: rgb(83, 92, 83);
  display: flex;
  justify-content: space-around;
  align-items: center;
}

#playgroundTop .parts {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
}

#playgroundTop .parts .num {
  background-color: #fff;
  border-radius: 5px;
  padding: 8px 10px;
  font-weight: 800;
}

.bubble {
  height: 40px;
  width: 40px;
  border-radius: 50%;
  margin: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 900;
  border: 1px solid #7e9eb3;
}

.bubble:hover {
  cursor: pointer;
  background-color: cornsilk;
  scale: 1.1;
}

#playgroundBtm {
  width: 100%;
  height: calc(100% - 80px);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

#center {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
}

#start {
  width: 100%;
  height: 100vh;
  position: absolute;
  z-index: 5;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #222;
}

#btns {
  display: flex;
  align-items: center;
  flex-direction: column;
  row-gap: 20vh;
}

#btns button {
  padding: 1.5vh 6vw;
  background-color: #a17fd0;
  border-radius: 10px;
  font-weight: 700;
}

#btns button:hover {
  cursor: pointer;
  border: 2px solid #7e9eb3;
}

#back {
  padding: 1.5vh 6vw;
  background-color: #a17fd0;
  border-radius: 10px;
  font-weight: 700;
}

#back:hover {
  cursor: pointer;
  border: 2px solid #7e9eb3;
}

#changeTheme {
  background-color: #ba96d2;
  height: 100vh;
  width: 100vw;
  padding: 4vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.alltheme {
  margin: 2vh 2vw;
  padding: 1.2vh 2vw;
  border: none;
  border-radius: 10px;
  font-weight: 600;
}

.alltheme:hover {
  cursor: pointer;
}

#green {
  color: rgb(0, 0, 0);
  background-color: rgb(92, 219, 92);
}

#volcano {
  color: #fff;
  background: linear-gradient(to right bottom, yellow, orange, red);
}

#hacker {
  color: rgb(0, 255, 0);
  background-color: #222;
}

#indian {
  color: rgb(0, 0, 255);
  background: linear-gradient(rgb(255, 166, 0), #fff, rgb(11, 192, 11));
}