/* ==========================================================================
   外观切换器（自动 / 浅色 / 深色）
   --------------------------------------------------------------------------
   UI 直接照 macOS「系统设置 → 外观」那张图做：三张桌面缩略图并排，
   选中项描一圈主题色。缩略图不是图片，是纯 CSS 渐变画的 —— 壁纸 + 菜单栏 +
   三个窗口圆点，三张图共用同一套骨架，只有壁纸底色不同。
   --------------------------------------------------------------------------
   为什么挂在右下角而不是塞进头部导航：
     首页的 header 由 React 渲染，任何插进去的节点都会在下一次重渲染时被清掉，
     只能靠 MutationObserver 反复重插，面板的展开状态会跟着丢。
     固定定位在 body 上，和 React 完全解耦，两个入口页表现也一致。
   ========================================================================== */

.nf-theme-dock {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  font-family: var(--nf-type-sans, -apple-system, "PingFang SC", sans-serif);
}

/* ---------- 触发按钮 ---------- */

.nf-theme-btn {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid #00000014;
  border-radius: 999px;
  background: #ffffffc7;
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  color: #0a0a0a;
  cursor: pointer;
  box-shadow: 0 4px 16px #00000014;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.22s ease, background 0.22s ease,
    border-color 0.22s ease;
}

.nf-theme-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px #0000001f;
}

.nf-theme-btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.nf-theme-btn svg {
  width: 20px;
  height: 20px;
  display: block;
}

/* 三个图标只显示当前生效的那个；pref 由 js 写在 <html data-nf-pref> 上 */
.nf-theme-btn .nf-ic {
  display: none;
}
html[data-nf-pref="auto"] .nf-theme-btn .nf-ic-auto,
html[data-nf-pref="light"] .nf-theme-btn .nf-ic-light,
html[data-nf-pref="dark"] .nf-theme-btn .nf-ic-dark {
  display: block;
}

/* ---------- 弹出面板 ---------- */

.nf-theme-pop {
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  width: 300px;
  padding: 16px 16px 14px;
  border: 1px solid #00000014;
  border-radius: 16px;
  background: #fffffff2;
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  backdrop-filter: saturate(180%) blur(24px);
  box-shadow: 0 18px 50px #0000002b, 0 2px 8px #00000014;
  transform-origin: bottom right;
  animation: nf-pop-in 0.22s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.nf-theme-pop[hidden] {
  display: none;
}

@keyframes nf-pop-in {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.nf-theme-pop-title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #0a0a0a;
}

.nf-theme-opts {
  display: flex;
  gap: 10px;
}

.nf-theme-opt {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.nf-theme-opt-label {
  font-size: 11px;
  line-height: 1.2;
  color: #6f6f6a;
  letter-spacing: 0.02em;
  transition: color 0.18s ease;
}

.nf-theme-opt[aria-checked="true"] .nf-theme-opt-label {
  color: #0a0a0a;
  font-weight: 600;
}

.nf-theme-opt:focus-visible {
  outline: 2px solid #0a0a0a;
  outline-offset: 4px;
  border-radius: 10px;
}

/* ---------- 缩略图：壁纸 + 菜单栏 + 一个窗口（左上三个圆点） ----------
   三张图共用同一套骨架，只有壁纸和窗口的明度不同：
   浅色 = 浅灰壁纸 + 白窗口 / 深色 = 深蓝壁纸 + 深灰窗口 / 自动 = 斜线对切。
   窗口用 <i class="nf-win">，菜单栏和圆点用伪元素，不额外增加节点。 */

.nf-sw {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 74 / 48;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 0 1px #0000001f, 0 1px 3px #0000001f;
  transition: box-shadow 0.2s ease, transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --nf-win: #ffffff;
}

/* 菜单栏：顶部通栏的浅色细条 */
.nf-sw::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 13%;
  background: #ffffffcf;
  border-bottom: 1px solid #0000000f;
}

/* 三个窗口圆点，落在窗口左上角内侧 */
.nf-sw::after {
  content: "";
  position: absolute;
  left: 19%;
  top: 30%;
  width: 34%;
  height: 8%;
  background: radial-gradient(circle at 8% 50%, #ff5f57 44%, transparent 48%),
    radial-gradient(circle at 50% 50%, #febc2e 44%, transparent 48%),
    radial-gradient(circle at 92% 50%, #28c840 44%, transparent 48%);
}

.nf-win {
  position: absolute;
  left: 13%;
  right: 13%;
  top: 25%;
  bottom: 12%;
  border-radius: 3px;
  background: var(--nf-win);
  box-shadow: 0 1px 4px #00000024;
}

.nf-sw-light {
  background: linear-gradient(165deg, #dbe1ec 0%, #ccd4e2 55%, #bcc6d6 100%);
}

.nf-sw-dark {
  background: linear-gradient(165deg, #3b4059 0%, #242938 55%, #15171f 100%);
  --nf-win: #1d2029;
}

.nf-sw-dark::before {
  background: #ffffff2e;
  border-bottom-color: #ffffff14;
}

/* 自动：斜线对切，左右各取一半 */
.nf-sw-auto {
  background: linear-gradient(105deg, #dbe1ec 0 46%, #3b4059 46%, #15171f 100%);
}

.nf-sw-auto::before {
  background: linear-gradient(105deg, #ffffffcf 0 46%, #ffffff2e 46%);
  border-bottom-color: transparent;
}

.nf-sw-auto .nf-win {
  background: linear-gradient(105deg, #ffffff 0 42%, #1d2029 42%);
}

/* 选中：描主题色 */
.nf-theme-opt[aria-checked="true"] .nf-sw {
  box-shadow: 0 0 0 2px #0a0a0a, 0 0 0 4px #0a0a0a1f;
}

.nf-theme-opt:hover .nf-sw {
  transform: translateY(-1px);
}

/* ==========================================================================
   深色皮肤下的一套配色
   ========================================================================== */

html[data-nf-theme="dark"] .nf-theme-btn {
  border-color: #ffffff1f;
  background: #181818c7;
  color: #f2f2ef;
  box-shadow: 0 4px 18px #000000a6;
}

html[data-nf-theme="dark"] .nf-theme-btn:hover {
  background: #202020d9;
  box-shadow: 0 10px 28px #000000cc;
}

html[data-nf-theme="dark"] .nf-theme-pop {
  border-color: #2a2a2a;
  background: #161616f2;
  box-shadow: 0 18px 50px #000000d9, 0 0 0 1px #ffffff0a inset;
}

html[data-nf-theme="dark"] .nf-theme-pop-title {
  color: #f2f2ef;
}

html[data-nf-theme="dark"] .nf-theme-opt-label {
  color: #8f8f8a;
}

html[data-nf-theme="dark"] .nf-theme-opt[aria-checked="true"] .nf-theme-opt-label {
  color: #f2f2ef;
}

html[data-nf-theme="dark"] .nf-theme-opt:focus-visible {
  outline-color: #8840f8;
}

html[data-nf-theme="dark"] .nf-sw {
  box-shadow: 0 0 0 1px #ffffff24, 0 1px 3px #00000080;
}

html[data-nf-theme="dark"] .nf-theme-opt[aria-checked="true"] .nf-sw {
  box-shadow: 0 0 0 2px #8840f8, 0 0 0 4px #8840f833;
}

/* 赏金猎人主题本身就是固定暗色，按钮跟着用暗色那一套，别在深色页上浮一块白 */
html.nf-theme-bounty .nf-theme-btn {
  border-color: #ffffff1f;
  background: #181818c7;
  color: #f2f2ef;
  box-shadow: 0 4px 18px #000000a6;
}

html.nf-theme-bounty .nf-theme-pop {
  border-color: #2a2a2a;
  background: #161616f2;
  box-shadow: 0 18px 50px #000000d9, 0 0 0 1px #ffffff0a inset;
}

html.nf-theme-bounty .nf-theme-pop-title,
html.nf-theme-bounty .nf-theme-opt[aria-checked="true"] .nf-theme-opt-label {
  color: #f2f2ef;
}

html.nf-theme-bounty .nf-theme-opt-label {
  color: #8f8f8a;
}

html.nf-theme-bounty .nf-theme-opt[aria-checked="true"] .nf-sw {
  box-shadow: 0 0 0 2px #8840f8, 0 0 0 4px #8840f833;
}

/* ==========================================================================
   窄屏：缩略图收窄，别把面板顶出屏幕
   ========================================================================== */

@media (max-width: 480px) {
  .nf-theme-dock {
    right: 14px;
    bottom: 14px;
  }
  .nf-theme-pop {
    width: min(300px, calc(100vw - 28px));
    padding: 14px 14px 12px;
  }
  .nf-theme-opts {
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nf-theme-pop {
    animation: none;
  }
  .nf-theme-btn,
  .nf-sw,
  .nf-theme-opt-label {
    transition: none;
  }
}