/* 小葵 OS 桌面 UI 框架 · 设计令牌与像素风组件样式
   配色沿用启动页任务书 3.2；像素风 = 像素字体 + 直角描边 + 经典高光/阴影斜面 */

:root {
  --xk-bg: #0b090e;
  --xk-panel: #17121d;
  --xk-panel-deep: #100c15;
  --xk-border: #6b4f60;
  --xk-border-hi: #a17990;
  --xk-pink: #e9b7c8;
  --xk-pink-hi: #f7d7e6;
  --xk-pink-dim: #987489;
  --xk-text: #f2d9e4;
  --xk-text-dim: #a68b99;
  --xk-shadow: rgba(0, 0, 0, 0.45);
  --xk-bevel-light: #33242f; /* 斜面受光（上/左） */
  --xk-bevel-dark: #08060b;  /* 斜面背光（下/右） */
  --xk-font: 'Fusion Pixel 12px', ui-monospace, SFMono-Regular, Consolas,
    'Microsoft YaHei', monospace;
  --xk-taskbar-h: 40px;
}

/* ---------- 图层事件规则：层本身不拦截，交互组件自行开启 ---------- */
#desktop .desktop-layer { pointer-events: none; }
#desktop .desktop-icon,
#desktop .pixel-window,
#desktop .taskbar,
#desktop .context-menu,
#desktop .start-menu { pointer-events: auto; }

/* ---------- 通用像素元素 ---------- */

/* 经典像素斜面：上/左受光、下/右背光 + 外投影 */
.xk-pixel-box {
  background: var(--xk-panel);
  border: 2px solid var(--xk-border);
  box-shadow:
    inset 2px 2px 0 0 var(--xk-bevel-light),
    inset -2px -2px 0 0 var(--xk-bevel-dark),
    4px 4px 0 0 var(--xk-shadow);
}

.xk-btn {
  font-family: var(--xk-font);
  font-size: 12px;
  color: var(--xk-text);
  background: var(--xk-panel-deep);
  border: 2px solid var(--xk-border);
  box-shadow:
    inset 1px 1px 0 0 var(--xk-bevel-light),
    inset -1px -1px 0 0 var(--xk-bevel-dark);
  padding: 0 10px;
  height: 26px;
  cursor: pointer;
  user-select: none;
}
.xk-btn:hover { border-color: var(--xk-border-hi); color: var(--xk-pink-hi); }
.xk-btn:focus-visible, .menu-item:focus-visible, .desktop-icon:focus-visible,
.pw-titlebar:focus-visible { outline: 2px dotted var(--xk-pink); outline-offset: -3px; }
/* 按下：斜面反转（像素游戏的经典"凹陷"反馈），不做位移 */
.xk-btn:active {
  box-shadow:
    inset -1px -1px 0 0 var(--xk-bevel-light),
    inset 1px 1px 0 0 var(--xk-bevel-dark);
  background: #0c0810;
}

/* ---------- 桌面图标 ---------- */
.layer-icons { z-index: 1; }

.desktop-icon {
  position: absolute;
  width: 76px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 2px 4px;
  cursor: pointer;
  user-select: none;
  touch-action: none; /* 触摸设备上允许拖动图标而不滚动页面 */
  font-family: var(--xk-font);
}

.desktop-icon.dragging {
  z-index: 5;
  opacity: 0.85;
  cursor: grabbing;
}

.desktop-icon .icon-img {
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  display: grid;
  place-items: center;
}
.desktop-icon .icon-img img { width: 48px; height: 48px; object-fit: contain; }


.desktop-icon .icon-label {
  font-size: 12px;
  color: var(--xk-text);
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.8);
  background: rgba(11, 9, 14, 0.55); /* 深色底衬，保证亮壁纸区域可读 */
  padding: 1px 5px;
  max-width: 76px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.desktop-icon.selected .icon-label {
  background: var(--xk-pink-dim);
  color: #fff;
  outline: 1px dotted var(--xk-pink-hi);
}
.desktop-icon.selected .icon-img {
  outline: 1px dotted var(--xk-pink-hi);
}

/* ---------- 像素窗口 ---------- */
.layer-windows { z-index: 2; }

/* 阶梯像素角：切掉四角 2px，形成像素游戏窗框的台阶轮廓 */
.pixel-window,
.start-menu,
.context-menu {
  clip-path: polygon(
    2px 0, calc(100% - 2px) 0, 100% 2px,
    100% calc(100% - 2px), calc(100% - 2px) 100%, 2px 100%,
    0 calc(100% - 2px), 0 2px
  );
}

/* 窗口弹出：两帧跳变，像老游戏的窗口开启 */
@keyframes xk-pop {
  0% { transform: scale(0.94); opacity: 0.4; }
  100% { transform: scale(1); opacity: 1; }
}

.pixel-window {
  position: absolute;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  font-family: var(--xk-font);
  animation: xk-pop 140ms steps(2) both;
}

@media (prefers-reduced-motion: reduce) {
  .pixel-window { animation: none; }
}

.pw-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  flex-shrink: 0;
  padding: 0 4px 0 8px;
  background: var(--xk-panel-deep);
  border-bottom: 2px solid var(--xk-border);
  user-select: none; /* 光标由 JS 按区域管理：标题栏 move / 边缘 resize */
  touch-action: none;
}

.pixel-window.active .pw-titlebar {
  /* 激活态：像素条纹抖动质感 */
  background: repeating-linear-gradient(90deg, #241827 0 2px, #1a121f 2px 4px);
  border-bottom-color: var(--xk-border-hi);
}

.pw-icon { width: 16px; height: 16px; display: grid; place-items: center; }
.pw-icon svg { width: 16px; height: 16px; }

.pw-title {
  flex: 1;
  font-size: 12px;
  color: var(--xk-text-dim);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.pixel-window.active .pw-title { color: var(--xk-pink-hi); }

.pw-btn {
  width: 22px;
  height: 20px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  color: var(--xk-text-dim);
}
.pw-btn svg { width: 10px; height: 10px; }
.pixel-window.active .pw-btn { color: var(--xk-pink); }

.pw-content {
  flex: 1;
  min-height: 160px;
  background: var(--xk-panel);
  color: var(--xk-text);
  font-size: 12px;
  overflow: auto;
  display: grid;
  place-items: center;
  /* 内容区内凹（背光在上/左），与窗口凸起斜面相对 */
  box-shadow:
    inset 2px 2px 0 0 var(--xk-bevel-dark),
    inset -2px -2px 0 0 var(--xk-bevel-light);
}

/* 像素风滚动条 */
.pw-content::-webkit-scrollbar { width: 12px; height: 12px; }
.pw-content::-webkit-scrollbar-track { background: var(--xk-panel-deep); }
.pw-content::-webkit-scrollbar-thumb {
  background: var(--xk-border);
  border: 2px solid var(--xk-panel-deep);
  box-shadow: inset 1px 1px 0 0 var(--xk-bevel-light);
}
.pw-content::-webkit-scrollbar-thumb:hover { background: var(--xk-border-hi); }
.pw-content::-webkit-scrollbar-corner { background: var(--xk-panel-deep); }

.app-placeholder {
  text-align: center;
  color: var(--xk-text-dim);
  line-height: 2;
}
.app-placeholder .icon-img { width: 48px; height: 48px; margin: 0 auto; }
.app-placeholder .icon-img svg { width: 48px; height: 48px; }
.app-placeholder .app-name { color: var(--xk-text); }
.app-placeholder .app-tagline { color: var(--xk-pink); }
.app-placeholder .app-wip { opacity: 0.55; }
.app-placeholder .app-about { color: var(--xk-text-dim); opacity: 0.8; }

/* ---------- 任务栏 ---------- */
.layer-taskbar { z-index: 3; }

.taskbar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--xk-taskbar-h);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  background: rgba(16, 12, 21, 0.94);
  border-top: 2px solid var(--xk-border);
  font-family: var(--xk-font);
}

.tb-start {
  height: 28px;
  font-size: 12px;
  color: var(--xk-pink);
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tb-start .pw-icon svg { width: 16px; height: 16px; }

.tb-apps {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  height: 100%;
}
.tb-apps::-webkit-scrollbar { display: none; }
.tb-app-item { display: flex; flex: 0 0 auto; }
.tb-start, .tb-tray { flex-shrink: 0; }

.tb-app-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  max-width: 168px;
  font-size: 12px;
}
.tb-app-btn .tb-label {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.tb-app-btn .pw-icon { width: 16px; height: 16px; }

.tb-app-btn.active {
  border-color: var(--xk-pink);
  color: var(--xk-pink-hi);
  box-shadow:
    inset 1px 1px 0 0 rgba(255, 255, 255, 0.08),
    inset -1px -1px 0 0 rgba(0, 0, 0, 0.5),
    inset 0 0 0 1px rgba(233, 183, 200, 0.25);
}
.tb-app-btn.minimized { color: var(--xk-text-dim); }
.tb-app-btn.has-attention { border-color: var(--xk-pink); }
.tb-app-btn.has-attention::after { content: ''; position: absolute; top: 2px; right: 2px; width: 5px; height: 5px; background: var(--xk-pink-hi); box-shadow: 0 0 0 1px var(--xk-panel-deep); }
.tb-attention-status { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* ---------- 桌面设置 ---------- */
.pw-content.settings-content { display: block; place-items: normal; min-width: 0; min-height: 0; padding: 20px; line-height: 1.8; }
.settings-heading { margin-bottom: 12px; }
.settings-kicker { color: var(--xk-pink-dim); font-size: 12px; }
.settings-heading h1 { margin: 6px 0 4px; font-size: 16px; font-weight: normal; color: var(--xk-pink-hi); }
.settings-heading p { margin: 0; color: var(--xk-text-dim); }
.setting-row { display: flex; align-items: center; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--xk-border); cursor: pointer; }
.setting-copy { flex: 1; min-width: 0; }
.setting-title, .setting-help { display: block; }
.setting-title { color: var(--xk-text); }
.setting-help { margin-top: 3px; color: var(--xk-text-dim); }
.setting-row input { width: 17px; height: 17px; margin: 0; accent-color: var(--xk-pink); flex-shrink: 0; }
.setting-row input:focus-visible, .setting-row select:focus-visible { outline: 2px dotted var(--xk-pink); outline-offset: 3px; }
.setting-motion { flex-wrap: wrap; }
.setting-motion .pixel-input { width: 144px; flex-shrink: 0; }
.settings-motion-note { margin: 8px 0 0; color: var(--xk-pink-dim); }
.settings-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.settings-notice { color: var(--xk-pink); min-height: 24px; margin: 10px 0 0; }

html[data-reduced-motion] .pixel-window,
html[data-reduced-motion] .typing-cursor,
html[data-reduced-motion] .waiting-reply .waiting-dot { animation: none; }
html[data-reduced-motion] #boot { transition: none; }

/* 右侧系统状态区 */
.tb-tray {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  height: 100%;
}

.tb-clock {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  line-height: 1.25;
  font-size: 12px;
  color: var(--xk-text);
  text-align: right;
  font-variant-numeric: tabular-nums;
  user-select: none;
}
.tb-clock .tb-time { color: var(--xk-pink-hi); }
.tb-clock .tb-date { color: var(--xk-text-dim); }

/* ---------- 开始菜单 / 右键菜单 ---------- */
.start-menu,
.context-menu {
  position: absolute;
  min-width: 148px;
  padding: 4px;
  z-index: 5;
  font-family: var(--xk-font);
}

.start-menu { left: 8px; bottom: calc(var(--xk-taskbar-h) + 4px); }

.menu-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--xk-text);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--xk-font);
}
.menu-item:hover { background: var(--xk-pink-dim); color: #fff; }

/* ---------- 小视口适配 ---------- */
@media (max-width: 720px) {
  .desktop-icon { width: 64px; }
  .pw-max { display: none; }
  .tb-app-btn { max-width: 36px; padding: 0 5px; }
  .tb-app-btn .tb-label { display: none; } /* 小屏只留图标 */
}

/* 关于窗口：公开主页链接与用户明确要求展示的联系方式。 */
.about-home { text-align: center; line-height: 1.7; }
.about-home-title { margin: 4px 0 6px; color: var(--xk-pink-hi); font-size: 16px; }
.about-home-note, .about-home-version { color: var(--xk-text-dim); font-size: 12px; }
.about-social { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 18px 0; }
.about-social a { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 14px; text-decoration: none; }
.about-contact { border-top: 1px solid var(--xk-border); padding-top: 12px; color: var(--xk-text-dim); font-size: 12px; }
.about-contact p { margin: 4px 0; color: var(--xk-text); font-size: 14px; }
.about-qq { user-select: text; cursor: text; }
.about-home-version { margin: 12px 0 0; }