:root {
  --taskbar-w: 208px;
  --glass-bg: rgba(255, 255, 255, 0.22);
  --glass-bg-strong: rgba(255, 255, 255, 0.38);
  --glass-border: rgba(255, 255, 255, 0.45);
  --glass-shadow: 0 18px 50px rgba(20, 30, 45, 0.28), 0 2px 8px rgba(20, 30, 45, 0.12);
  --text: #18222e;
  --text-dim: rgba(24, 34, 46, 0.62);
  --accent: #2f7cf6;
  --radius: 14px;
  font-family: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

body {
  background: #b9c0c2 url("../assets/wallpaper.jpg") center / cover no-repeat fixed;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

button { font: inherit; color: inherit; }

.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
}

/* ---------------- Taskleiste (links) ---------------- */
.taskbar {
  position: fixed;
  z-index: 100000;
  left: 10px; top: 10px; bottom: 10px;
  width: var(--taskbar-w);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  padding: 10px;
  gap: 6px;
}

.start-btn, .task {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 10px;
  padding: 9px 10px;
  cursor: pointer;
  text-align: left;
  transition: background .15s, border-color .15s;
}
.start-btn { font-weight: 700; font-size: 15px; letter-spacing: .3px; justify-content: center; }
.start-btn:hover, .task:hover { background: rgba(255, 255, 255, 0.35); }
.start-btn[aria-expanded="true"] { background: rgba(255, 255, 255, 0.5); }

.task-sep { height: 1px; background: rgba(24, 34, 46, 0.12); margin: 2px 6px; }

.tasks { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.tasks:empty::after {
  content: "Keine Anwendungen geöffnet";
  font-size: 12px; color: var(--text-dim); padding: 8px 10px;
}
.task { position: relative; font-size: 14px; }
.task .t-icon { width: 24px; height: 24px; flex: none; }
.task .t-icon svg { width: 100%; height: 100%; }
.task .t-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task::before {
  content: ""; position: absolute; left: -4px; top: 50%;
  width: 4px; height: 0; border-radius: 4px;
  background: var(--accent); transform: translateY(-50%);
  transition: height .15s;
}
.task.active { background: rgba(255, 255, 255, 0.55); border-color: rgba(255,255,255,.6); }
.task.active::before { height: 60%; }
.task.minimized { opacity: .7; }

.tray { border-top: 1px solid rgba(24, 34, 46, 0.12); padding-top: 8px; }
.clock { display: flex; flex-direction: column; align-items: center; line-height: 1.2; }
.clock .time { font-size: 20px; font-weight: 600; letter-spacing: .5px; }
.clock .date { font-size: 12px; color: var(--text-dim); }

/* ---------------- Startmenü ---------------- */
.start-menu {
  position: fixed;
  z-index: 100001;
  left: calc(var(--taskbar-w) + 20px);
  top: 10px;
  width: 300px;
  border-radius: 18px;
  padding: 14px;
  background: var(--glass-bg-strong);
  animation: pop .14s ease-out;
}
.start-menu[hidden] { display: none; }
.start-head { font-size: 13px; font-weight: 600; color: var(--text-dim); padding: 2px 8px 10px; text-transform: uppercase; letter-spacing: .8px; }
.start-list { display: flex; flex-direction: column; gap: 2px; }
.start-item {
  display: flex; align-items: center; gap: 12px;
  border: 0; background: transparent; border-radius: 10px;
  padding: 8px; cursor: pointer; text-align: left;
}
.start-item:hover, .start-item:focus-visible { background: rgba(255,255,255,.55); outline: none; }
.start-item .s-icon { width: 34px; height: 34px; flex: none; }
.start-item .s-icon svg { width: 100%; height: 100%; }
.start-item b { display: block; font-weight: 600; font-size: 14px; }
.start-item small { color: var(--text-dim); font-size: 12px; }

@keyframes pop { from { opacity: 0; transform: translateY(-6px) scale(.98); } }

/* ---------------- Desktop ---------------- */
.desktop {
  position: fixed;
  inset: 0 0 0 calc(var(--taskbar-w) + 20px);
}
.icons {
  position: absolute; top: 16px; left: 10px;
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(auto-fill, 104px);
  gap: 8px;
  max-height: calc(100% - 32px);
}
.icon {
  width: 92px; height: 104px;
  border: 1px solid transparent; border-radius: 12px;
  background: transparent;
  display: flex; flex-direction: column; align-items: center; justify-content: flex-start;
  gap: 6px; padding: 10px 4px 6px;
  cursor: pointer;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,.65);
  font-size: 13px;
}
.icon .d-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center;
  background: rgba(255,255,255,.35);
  border: 1px solid rgba(255,255,255,.55);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 6px 16px rgba(0,0,0,.18);
}
.icon .d-icon svg { width: 38px; height: 38px; }
.icon:hover, .icon:focus-visible { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.35); outline: none; }
.icon.selected { background: rgba(255,255,255,.28); border-color: rgba(255,255,255,.55); }

/* ---------------- Fenster ---------------- */
.window {
  position: absolute;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  min-width: 320px;
  min-height: 220px;
  background: rgba(255,255,255,.26);
  transition: box-shadow .2s, opacity .16s, transform .16s;
  animation: winIn .18s ease-out;
}
@keyframes winIn { from { opacity: 0; transform: scale(.97); } }
.window.inactive { box-shadow: 0 10px 30px rgba(20,30,45,.18); }
.window.inactive .titlebar { opacity: .78; }
.window.minimized { display: none; }
.window.maximized { border-radius: 12px; }
.window.closing { opacity: 0; transform: scale(.97); }

.titlebar {
  display: flex; align-items: center; gap: 10px;
  height: 40px; flex: none;
  padding: 0 6px 0 12px;
  cursor: default;
  touch-action: none;
  border-bottom: 1px solid rgba(255,255,255,.4);
}
.win-icon { width: 20px; height: 20px; flex: none; }
.win-icon svg { width: 100%; height: 100%; }
.win-title { flex: 1; font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.win-controls { display: flex; gap: 4px; }
.wc {
  width: 34px; height: 28px; border-radius: 8px;
  border: 0; background: transparent; cursor: pointer;
  display: grid; place-items: center;
}
.wc svg { width: 12px; height: 12px; fill: none; stroke: var(--text); stroke-width: 1.4; stroke-linecap: round; }
.wc:hover { background: rgba(255,255,255,.5); }
.wc.close:hover { background: #e5484d; }
.wc.close:hover svg { stroke: #fff; }

.win-body { position: relative; flex: 1; background: rgba(250, 251, 252, .55); }
.win-body iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; display: block; background: transparent; }
.window.dragging iframe, body.dragging iframe { pointer-events: none; }
body.dragging { cursor: grabbing; }

.resize-handle {
  position: absolute; right: 0; bottom: 0; width: 18px; height: 18px;
  cursor: nwse-resize; touch-action: none;
}
.resize-handle::after {
  content: ""; position: absolute; right: 4px; bottom: 4px; width: 8px; height: 8px;
  border-right: 2px solid rgba(24,34,46,.35); border-bottom: 2px solid rgba(24,34,46,.35);
  border-radius: 0 0 3px 0;
}
.window.maximized .resize-handle { display: none; }

/* ---------------- Schmale Bildschirme ---------------- */
@media (max-width: 760px) {
  :root { --taskbar-w: 64px; }
  .taskbar { left: 6px; top: 6px; bottom: 6px; padding: 8px 6px; border-radius: 14px; }
  .task .t-name, .tasks:empty::after { display: none; }
  .start-btn { font-size: 12px; }
  .start-btn, .task { justify-content: center; padding: 9px 0; }
  .clock .date { display: none; }
  .clock .time { font-size: 14px; }
  .start-menu { left: 76px; top: 6px; width: min(300px, calc(100vw - 86px)); }
  .desktop { left: 76px; }
  .icons { left: 0; top: 8px; }
  .icon { width: 84px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}