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

body {
  background-color: #121212;
  color: #ffffff;
  font-family: Arial, sans-serif;
}

.circle {
  width: 50px;
  height: 50px;
  border-radius: 360px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  margin: 10px;
  transition: all 0.5s ease;
  color: white;
  background-color: #212121;
  transition: transform 0.5s ease;
}

#placeholder {
  text-align: center;
  font-weight: bold;
}

#container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  justify-content: center;
  align-items: center;
  text-align: center;
  justify-items: center;
}

#globalContainer {
  display: flex;
  min-height: 100vh;
  width: 100%;
  justify-content: center;
  text-align: center;
  flex-direction: column;
  background: #121212;
}

button {
  position: relative;
  overflow: hidden;
  background-color: #0d47a1;
  color: white;
  padding: 10px 20px;
  border: none;
  margin: 30px;
  border-radius: 5px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #1565c0;
}

#sortUser {
  background-color: #1565c0;
}

#sortUser:hover {
  background-color: #0d47a1;
}

#circle1 {
  background: #1976d2;
}

#circle2 {
  background: #424242;
}

#circle3 {
  background: #2196f3;
}

#circle4 {
  background: #ff9800;
}

#circle5 {
  background: #f4511e;
}

#circle6 {
  background: #ba68c8;
}

.circle.animate {
  animation: shakeCircle 0.1s infinite alternate-reverse;
}

#numCirclesSelect {
  border: 1px solid #ccc;
  border-radius: 5px;
  outline: none;
  padding: 5px 10px;
  font-size: 16px;
  background-color: #fff;
  color: #333;
  margin: 0 20px;
}

#numCirclesSelect option {
  margin: 0 20px;
  background-color: #fff;
  color: #333;
}

@keyframes shakeCircle {
  0% {
    transform: translateY(-2px);
  }

  100% {
    transform: translateY(2px);
  }
}