* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background-color: #c5ebaa;
}

.heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

h1 {
  color: #2a2a2a;
}

.container {
  position: absolute;
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
}

h1 {
  font-size: 4em;
}

.score-container {
  color: #2a2a2a;
  font-size: 36px;
  margin-bottom: 10px;
}

#score {
  font-weight: 600;
}

.grid {
  width: 25em;
  height: 25em;
  background-color: #f6f193;
  border: 5px solid #f2c18d;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  border-radius: 0.5em;
}

.box {
  width: 97.5px;
  height: 97.5px;
  border: 5px solid #f2c18d;
  font-size: 40px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cover-screen {
  position: absolute;
  top: 0;
  left: 0;
  background-color: #c5ebaa;
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#start-button {
  background-color: #2a2a2a;
  padding: 20px 30px;
  border: none;
  border-radius: 5px;
  font-size: 18px;
  cursor: pointer;
  color: #fff;
}

#result {
  margin: 5px 0;
  font-size: 18px;
}

h2 {
  font-size: 30px;
}

.hide {
  display: none;
}

.box-2 {
  background-color: red;
  color: #fff;
}

.box-4 {
  background-color: olivedrab;
  color: #fff;
}

.box-8 {
  background-color: pink;
  color: white;
}

.box-16 {
  background-color: blue;
  color: white;
}

.box-32 {
  background-color: gray;
  color: white;
}

.box-64 {
  background-color: yellowgreen;
  color: white;
}

.box-128 {
  background-color: #2a2a2a;
  color: white;
}

.box-256 {
  background-color: cadetblue;
  color: white;
}

.box-512 {
  background-color: crimson;
  color: white;
}

.box-1024 {
  background-color: darkkhaki;
  color: white;
}

.box-2048 {
  background-color: coral;
  color: white;
}