body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
}

#timer {
  font-size: 10vw;
  margin-bottom: 20px;
}

.button {
  width: 100px;
  margin: 5px;
}

.skin-button {
  margin-top: 10px;
  width: auto;
  padding: 5px 10px;
}

.container {
  text-align: center;
}

.gomb {
  width: 5vw;
  height: 5vw;
  min-width:50px;
  min-height:50px;
  display: inline-block;
  margin: 20px;
  padding: 10px;
  box-shadow: 3px 3px 5px black;
  border-radius: 5vw;
}

#start {
  background-image: radial-gradient(circle, darkgreen, green, black);
}

#stop {
  background-image: radial-gradient(circle, darkred, red, black);
}

#reset {
  background-image: radial-gradient(circle, darkblue, blue, black);
}

#start:hover {
  background-image: radial-gradient(circle, green, rgb(0, 0, 0, 0.3));
}

#stop:hover {
  background-image: radial-gradient(circle, red, rgb(0, 0, 0, 0.3));
}

#reset:hover {
  background-image: radial-gradient(circle, blue, rgb(0, 0, 0, 0.3));
}