/* ============================================================
   显示设置面板（js/settings-panel.js）
   ----------------------------------------------------
   入口在左下角（右下被看板娘/回到顶部/音乐 FAB 占满，左上被星场 HUD 占）。
   面板本身只占一层，不引入大面积 backdrop-filter —— 轻档机器上也开得起。
   层级：齿轮 34（低于吸顶导航 40）／面板 66（高于弹窗 50 与搜索 60，低于按住 Tab 的浮层 70）。
   ============================================================ */

/* 开关的「立即生效」部分：引擎真正的启停要刷新（见 js/settings-panel.js 注释） */
html.fx-no-particles #particle-canvas {
  display: none;
}
html.fx-no-cosmos #cosmos-canvas,
html.fx-no-cosmos .cosmos-veil {
  display: none;
}
html.fx-no-live2d #waifu,
html.fx-no-live2d #live2d-close {
  display: none !important;
}

.fx-open {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 34;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 9999px;
  background: rgba(18, 20, 27, 0.62);
  color: #86868b;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, transform 0.25s var(--ease-swift);
}
.fx-open svg {
  width: 17px;
  height: 17px;
}
.fx-open:hover {
  color: #f5f5f7;
  background: rgba(18, 20, 27, 0.9);
  transform: rotate(24deg);
}
.fx-open[aria-expanded="true"] {
  color: #8fb8ff;
}

.fx-panel {
  position: fixed;
  left: 16px;
  bottom: 62px;
  z-index: 66;
  width: min(21rem, calc(100vw - 32px));
  max-height: min(70vh, 30rem);
  overflow: auto;
  padding: 0.9rem 1rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(16, 18, 24, 0.86);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  -webkit-backdrop-filter: blur(22px) saturate(1.35);
  backdrop-filter: blur(22px) saturate(1.35);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s var(--ease-swift), transform 0.24s var(--ease-swift);
}
.fx-panel.is-open {
  opacity: 1;
  transform: none;
}
.fx-panel[hidden] {
  display: none;
}

.fx-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.7rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.fx-head b {
  color: #f5f5f7;
  font-size: 13px;
  font-weight: 600;
}
.fx-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 9999px;
  background: transparent;
  color: #86868b;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.fx-close svg {
  width: 14px;
  height: 14px;
}
.fx-close:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.fx-body {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.fx-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 28px;
}
.fx-row-col {
  flex-direction: column;
  align-items: stretch;
  gap: 0.45rem;
}
.fx-label {
  flex: 0 0 auto;
  min-width: 4.2rem;
  color: #86868b;
  font-size: 12px;
}
.fx-row input[type="range"] {
  flex: 1 1 auto;
  min-width: 0;
  height: 18px;
  accent-color: #8fb8ff;
  cursor: pointer;
}
.fx-val {
  flex: 0 0 auto;
  min-width: 2.6rem;
  color: #b9c8ff;
  font-family: ui-monospace, Consolas, "Courier New", monospace;
  font-size: 11px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* 三选一档位 */
.fx-seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 3px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
}
.fx-seg button {
  padding: 0.35rem 0.2rem;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #86868b;
  font-size: 12px;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.fx-seg button:hover {
  color: #f5f5f7;
}
.fx-seg button.is-on {
  color: #0a0a0c;
  background: #8fb8ff;
  font-weight: 600;
}
.fx-hint {
  color: rgba(158, 176, 202, 0.72);
  font-size: 11px;
  line-height: 1.6;
}
.fx-hint:empty {
  display: none;
}

/* 开关：隐藏原生 checkbox，用胶囊替身 */
.fx-row-sw {
  cursor: pointer;
}
.fx-row-sw input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.fx-sw {
  position: relative;
  flex: 0 0 auto;
  width: 40px;
  height: 22px;
  margin-left: auto;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.06);
  transition: background-color 0.22s ease, border-color 0.22s ease;
}
.fx-sw::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 9999px;
  background: #86868b;
  transition: transform 0.22s var(--ease-swift), background-color 0.22s ease;
}
.fx-row-sw input:checked ~ .fx-sw {
  border-color: rgba(143, 184, 255, 0.6);
  background: rgba(143, 184, 255, 0.24);
}
.fx-row-sw input:checked ~ .fx-sw::after {
  background: #8fb8ff;
  transform: translateX(18px);
}
.fx-row-sw input:focus-visible ~ .fx-sw {
  outline: 2px solid rgba(143, 184, 255, 0.7);
  outline-offset: 2px;
}

.fx-note {
  margin-top: 0.6rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid rgba(143, 184, 255, 0.28);
  border-radius: 9px;
  background: rgba(143, 184, 255, 0.08);
  color: #b9c8ff;
  font-size: 11px;
  line-height: 1.6;
}
.fx-note[hidden] {
  display: none;
}

.fx-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.75rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.fx-reset {
  padding: 0.32rem 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.04);
  color: #f5f5f7;
  font-size: 11.5px;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.fx-reset:hover {
  border-color: rgba(143, 184, 255, 0.5);
  background: rgba(143, 184, 255, 0.12);
}
.fx-about {
  color: #86868b;
  font-size: 11.5px;
  text-decoration: none;
  transition: color 0.2s ease;
}
.fx-about:hover {
  color: #f5f5f7;
}

/* 窄屏：面板变底部抽屉，别顶到屏幕上沿 */
@media (max-width: 640px) {
  .fx-open {
    left: 12px;
    bottom: 12px;
    width: 34px;
    height: 34px;
  }
  .fx-panel {
    left: 12px;
    right: 12px;
    bottom: 54px;
    width: auto;
    max-height: 62vh;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fx-open,
  .fx-panel,
  .fx-sw,
  .fx-sw::after {
    transition: none;
  }
  .fx-open:hover {
    transform: none;
  }
}