/* Sai Theme Lab · floating param panel v2
 * 顶标签 / 中参数 / 底动作 · 可拖可缩放 · 无可见滚动条 · gruvbox 壳
 */
.tl-param-panel {
  --tl-bg: #1d2021;
  --tl-bg-2: #282828;
  --tl-fg: #ebdbb2;
  --tl-muted: #a89984;
  --tl-accent: #fe8019;
  --tl-border: #504945;
  --tl-swatch-ring: #fbf1c7;
  position: fixed;
  z-index: 99999;
  width: min(420px, calc(100vw - 24px));
  height: min(72vh, 640px);
  min-width: 340px;
  min-height: 320px;
  max-width: min(560px, calc(100vw - 16px));
  max-height: min(90vh, 900px);
  display: flex;
  flex-direction: column;
  background: var(--tl-bg);
  color: var(--tl-fg);
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  font: 14px/1.45 "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
  backdrop-filter: blur(12px);
  user-select: none;
  overflow: hidden;
}

.tl-param-panel[data-corner="br"] { right: 14px; bottom: 14px; }
.tl-param-panel[data-corner="bl"] { left: 14px; bottom: 14px; }
.tl-param-panel[data-corner="tr"] { right: 14px; top: 14px; }
.tl-param-panel[data-corner="tl"] { left: 14px; top: 14px; }

/* Wall / iframe embed: compact + default collapsed */
.tl-param-panel.is-embed {
  width: min(280px, calc(100vw - 16px));
  height: auto;
  max-height: min(48vh, 360px);
  min-width: 200px;
  min-height: 0;
  font-size: 13px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.45);
}
.tl-param-panel.is-embed .tl-param-panel__resize {
  display: none;
}

/* dock FAB: whole panel collapses to bottom-right square */
.tl-param-panel.is-collapsed {
  width: 56px !important;
  height: 56px !important;
  min-width: 56px !important;
  min-height: 56px !important;
  max-width: 56px !important;
  max-height: 56px !important;
  right: 14px !important;
  bottom: 14px !important;
  left: auto !important;
  top: auto !important;
  border-radius: 14px;
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  opacity: 0.96;
}
.tl-param-panel.is-collapsed:hover {
  opacity: 1;
  border-color: var(--tl-accent);
}
.tl-param-panel.is-collapsed .tl-param-panel__head,
.tl-param-panel.is-collapsed .tl-param-panel__tabs,
.tl-param-panel.is-collapsed .tl-param-panel__body,
.tl-param-panel.is-collapsed .tl-param-panel__foot,
.tl-param-panel.is-collapsed .tl-param-panel__resize {
  display: none !important;
}
.tl-param-panel__fab {
  display: none;
  width: 100%;
  height: 100%;
  appearance: none;
  border: 0;
  background: linear-gradient(145deg, #3c3836, #1d2021);
  color: var(--tl-accent);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 0;
  font: inherit;
}
.tl-param-panel.is-collapsed .tl-param-panel__fab {
  display: flex;
}
.tl-param-panel__fab-mark {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--tl-fg);
}
.tl-param-panel__fab:hover .tl-param-panel__fab-mark {
  color: var(--tl-accent);
}

.tl-param-panel__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--tl-bg-2);
  border-bottom: 1px solid var(--tl-border);
  cursor: grab;
  flex: 0 0 auto;
}
.tl-param-panel__head:active { cursor: grabbing; }
.tl-param-panel__title {
  flex: 1;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.03em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tl-param-panel__tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
  padding: 8px 10px 0;
  flex: 0 0 auto;
  overflow-x: auto;
  scrollbar-width: none;
}
.tl-param-panel__tabs::-webkit-scrollbar { width: 0; height: 0; display: none; }
.tl-param-panel__tab {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--tl-muted);
  border-radius: 8px 8px 0 0;
  padding: 8px 12px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.tl-param-panel__tab:hover {
  color: var(--tl-fg);
  background: color-mix(in srgb, var(--tl-bg-2) 80%, transparent);
}
.tl-param-panel__tab.is-active {
  color: var(--tl-fg);
  background: var(--tl-bg-2);
  border-color: var(--tl-border);
  border-bottom-color: var(--tl-bg-2);
}

.tl-param-panel__btn {
  appearance: none;
  border: 1px solid var(--tl-border);
  background: transparent;
  color: var(--tl-fg);
  border-radius: 8px;
  padding: 7px 12px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  line-height: 1.35;
}
.tl-param-panel__btn:hover {
  border-color: var(--tl-accent);
  color: var(--tl-accent);
}
.tl-param-panel__btn--accent {
  border-color: color-mix(in srgb, var(--tl-accent) 55%, var(--tl-border));
  background: color-mix(in srgb, var(--tl-accent) 14%, transparent);
  color: var(--tl-accent);
}
.tl-param-panel__btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
.tl-param-panel__btn--icon {
  min-width: 34px;
  padding-left: 8px;
  padding-right: 8px;
}

.tl-param-panel__body {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--tl-bg-2);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.tl-param-panel__body::-webkit-scrollbar {
  width: 0;
  height: 0;
  display: none;
}

.tl-param-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 10px;
  align-items: center;
}
.tl-param-row label {
  grid-column: 1 / -1;
  color: var(--tl-muted);
  font-size: 13px;
  font-weight: 600;
}
.tl-param-row input[type="range"] {
  width: 100%;
  accent-color: var(--tl-accent);
  height: 22px;
}
.tl-param-row input[type="number"],
.tl-param-row input[type="text"],
.tl-param-row select {
  width: 100%;
  grid-column: 1 / -1;
  background: var(--tl-bg);
  border: 1px solid var(--tl-border);
  color: var(--tl-fg);
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
  font-size: 14px;
}
.tl-param-row select {
  cursor: pointer;
}
.tl-param-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--tl-accent);
  justify-self: start;
}
.tl-param-val {
  color: var(--tl-accent);
  font-variant-numeric: tabular-nums;
  min-width: 3.6em;
  text-align: right;
  font-size: 13px;
  font-weight: 600;
}

/* gruvbox swatch grid — no free color picker */
.tl-param-swatches {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tl-param-swatch {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  border: 2px solid color-mix(in srgb, var(--tl-border) 80%, #000);
  cursor: pointer;
  padding: 0;
  appearance: none;
  background: var(--sw, #282828);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.25);
}
.tl-param-swatch:hover {
  transform: scale(1.06);
}
.tl-param-swatch.is-active {
  border-color: var(--tl-swatch-ring);
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--tl-accent) 70%, transparent),
    inset 0 0 0 1px rgba(0, 0, 0, 0.2);
}
.tl-param-swatch-meta {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--tl-muted);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}

.tl-param-panel__foot {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px 14px;
  border-top: 1px solid var(--tl-border);
  background: var(--tl-bg);
}
.tl-param-panel__foot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tl-param-panel__foot-row .tl-param-panel__btn {
  flex: 1 1 auto;
  min-width: 6.5em;
  text-align: center;
}
.tl-param-panel__foot-row--primary .tl-param-panel__btn {
  min-height: 38px;
}

.tl-param-panel__resize {
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 18px;
  height: 18px;
  cursor: nwse-resize;
  background:
    linear-gradient(
      135deg,
      transparent 0 46%,
      var(--tl-muted) 46% 54%,
      transparent 54% 70%,
      var(--tl-muted) 70% 78%,
      transparent 78%
    );
  opacity: 0.75;
}
.tl-param-panel__resize:hover {
  opacity: 1;
}

/* select + option contrast — Windows native dropdown needs explicit option colors */
.tl-param-row select,
.tl-param-board select {
  background: var(--tl-bg, #1d2021) !important;
  color: var(--tl-fg, #ebdbb2) !important;
  color-scheme: dark;
}
.tl-param-row select option,
.tl-param-row select optgroup,
.tl-param-board select option,
.tl-param-board select optgroup {
  background-color: #1d2021;
  color: #ebdbb2;
}