:root {
  --primary: #FF2E2E;
  --accent: #FF2E2E;
  --bg: #101018;
  --card: #18181F;
  --button: #232323;
  --button-hover: #FF2E2E;
  --text: #FFFFFF;
  --window-bg: #22222B;
  --window-active: #FF2E2E;
  --window-inactive: #44445A;
  --taskbar-bg: #18181FEE;
  --tray-bg: #18181FCC;
  --shadow: 0 4px 24px rgba(255,46,46,0.08);
  --radius: 12px;
  --wallpaper: url('https://images.unsplash.com/photo-1506744038136-46273834b3fb?auto=format&fit=crop&w=1500&q=80');
  --transition: cubic-bezier(.5,.1,.1,1);
}

#desktop-bg {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background-image: var(--wallpaper);
  background-size: cover;
  background-position: center;
  z-index: 0;
  transition: background-image 1s var(--transition);
}

#desktop {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  z-index: 1;
  pointer-events: none;
}

/* Windows container, don't overlap taskbar/tray */
#windows {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: calc(100vh - 48px);
  z-index: 2;
  pointer-events: none;
}

.os-window {
  position: absolute;
  background: var(--window-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text);
  min-width: 260px;
  min-height: 160px;
  max-width: 96vw;
  max-height: calc(92vh - 48px);
  resize: both;
  overflow: hidden;
  z-index: 3;
  transition: box-shadow 0.3s, border 0.3s, transform 0.5s var(--transition);
  pointer-events: auto;
}
.os-window.active { border: 2px solid var(--window-active); }
.os-window.inactive { border: 2px solid var(--window-inactive); }
.os-window-header {
  background: var(--card);
  padding: 0.5rem 1rem;
  cursor: move;
  display: flex; align-items: center; justify-content: space-between;
  border-radius: var(--radius) var(--radius) 0 0;
  user-select: none;
}
.os-window-title { font-family: 'Orbitron', Arial, sans-serif; font-size: 1.1rem; }
.os-window-controls button {
  background: transparent; border: none; color: var(--accent);
  font-size: 1.2rem; margin-left: 0.5rem; cursor: pointer;
  transition: color 0.2s;
}
.os-window-controls button:hover { color: var(--window-active); }
.os-window-content { padding: 1rem; height: calc(100% - 38px); overflow: auto; }

/* --- Taskbar and Tray --- */
.taskbar {
  position: fixed; bottom: 0; left: 0; width: calc(100vw - 180px); height: 48px;
  background: var(--taskbar-bg);
  display: flex; align-items: center; justify-content: flex-start;
  z-index: 10;
  box-shadow: 0 -2px 24px var(--shadow);
  border-radius: var(--radius) 0 0 0;
  padding: 0 1.2rem;
}
.taskbar-apps {display: flex; gap: 1rem;}
.taskbar-app {background: none; border: none; color: var(--primary); font-size: 1.4rem; cursor: pointer; margin: 0 0.2rem;}
.taskbar-app.running {color: var(--accent);}
.taskbar-start {font-family: 'Orbitron'; font-size: 1.2rem; background: var(--accent); color: #fff; border-radius: var(--radius); padding: 0.6rem 1rem; cursor: pointer;}
.tray {
  position: fixed; bottom: 0; right: 0; width: 180px; height: 48px;
  background: var(--tray-bg);
  display: flex; align-items: center; gap: 1rem; justify-content: flex-end;
  z-index: 11;
  border-radius: 0 var(--radius) 0 0;
  padding: 0 1.2rem;
}
.tray-clock {font-family: 'Orbitron'; font-size: 1.1rem; color: var(--accent);}
.tray-icon {font-size: 1.3rem; color: var(--primary); margin-left: 0.6rem;}
/* Context menu */
#context-menu {
  position: fixed;
  display: none;
  z-index: 9999;
  background: var(--card);
  color: var(--text);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 160px;
  padding: 0.4rem 0;
}
.context-menu-item {
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.18s;
}
.context-menu-item:hover {
  background: var(--button-hover);
  color: #fff;
}
.game-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1rem;
}
.game-btn {
  background: var(--button);
  color: var(--primary);
  font-family: 'Orbitron', Arial, sans-serif;
  font-size: 1.2rem;
  padding: 1.4rem 2.2rem;
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: background 0.18s, color 0.18s, transform 0.22s;
  outline: none;
  position: relative;
  overflow: hidden;
}
.game-btn:hover {
  background: var(--button-hover);
  color: var(--text);
  transform: scale(1.08) rotate(-2deg);
  box-shadow: 0 6px 28px var(--shadow);
}
/* Animations, drag-drop, snap, and more apps can be added here */
@media (max-width: 700px) {
  .taskbar { width: 100vw; height: 38px; padding: 0 0.4rem; border-radius: var(--radius) var(--radius) 0 0;}
  .tray { width: 100vw; height: 38px; left: 0; right: 0; bottom: 38px; border-radius: 0 0 var(--radius) var(--radius;}
  #windows { height: calc(100vh - 76px); }
  .os-window { min-width: 180px; max-height: calc(92vh - 76px);}
  .game-btns {gap: 1rem;}
}