body {
  border: 2px solid;
  border-color: #fff #000 #000 #fff;
  cursor: pointer;
}

button:active {
  border-color: #000 #fff #fff #000;
}

.taskbar {
  position: fixed;
  bottom: 0;
  width: 100%;
  background: #2a2a2a;
  border-top: 2px solid #555;
  display: flex;
  align-items: center;
  padding: 5px;
}

#clock {
  margin-left: auto;
  background: #c0c0c0;
  color: black;
  border: 2px solid;
  border-color: #000 #fff #fff #000;
  padding: 2px 8px;
  font-size: 12px;
}

.start-menu {
  position: absolute;
  bottom: 35px;
  left: 5px;
  width: 200px;
  background: #c0c0c0;
  border: 2px solid;
  border-color: #fff #000 #000 #fff;
  display: none;
}

.start-menu div {
  padding: 5px;
  cursor: pointer;
}

.start-menu div:hover {
  background: #000080;
  color: white;
}