body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-image: url('https://wallpapercave.com/wp/wp2808007.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    flex-direction: column;
}

.taskbar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 10px 20px;
    gap: 20px;
    z-index: 10;
}

.taskbar .icon-btn {
    cursor: pointer;
    font-size: 24px;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.taskbar .icon-btn:hover {
    color: #00BFFF;
}

.taskbar .icon-btn .indicator {
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: #00BFFF;
  display: block;
  opacity: 0;
  transition: opacity 0.5s ease;
}
    
.fade-out {
  opacity: 0;
  transition: opacity 0.5s ease;
}
.clock {
    font-size: 14px;
    color: white;
    position: absolute;
    right: 50px;
}
.window {
    position: absolute;
    cursor: grab;
    display: none;
}
.window.active {
    display: block;
}
.window:active {
    cursor: grabbing;
}
.window img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}
.window-buttons {
    display: flex;
    gap: 10px;
}
.icon-btn:before {
    font-family: "Segoe UI Symbol", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.window-body ul {
    list-style-type: disc;
    padding-left: 40px;
    margin: 0;
    list-style-position: inside;
}
.window-body ul li {
    margin: 0;
    padding: 0;
}
.no-select {
    user-select: none;
}
#open-window1:before {
    content: "❓";
}
#open-window2:before {
    content: "🔗";
}
#open-window3:before {
    content: "💡";
}
#open-window4:before {
    content: "🌐";
}