/* Bottom-right floating toolbar: layout + theme switcher. */

#toolbarHost {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.tb-fab {
  position: relative;
  width: 56px;
  height: 56px;
  border: 0;
  border-radius: 50%;
  background: var(--header-bg);
  color: #fff;
  cursor: pointer;
  box-shadow: var(--shadow-pop);
  display: grid;
  place-items: center;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.tb-fab:hover {
  transform: translateY(-2px) scale(1.04);
}

/* burger -> X */
.tb-burger {
  display: grid;
  gap: 4px;
  width: 20px;
}

.tb-burger i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform 0.34s var(--ease), opacity 0.2s var(--ease), width 0.34s var(--ease);
  width: 20px;
}

.tb-fab-menu.is-open .tb-burger i:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.tb-fab-menu.is-open .tb-burger i:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.tb-fab-menu.is-open .tb-burger i:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.tb-panel {
  width: min(340px, calc(100vw - 40px));
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-pop);
  display: grid;
  gap: 16px;
  transform-origin: bottom right;
  opacity: 0;
  transform: translateY(10px) scale(0.94);
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease), visibility 0.26s;
}

.tb-panel.is-open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  visibility: visible;
}

.tb-title {
  margin: 0 0 8px;
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.tb-layouts {
  display: grid;
  gap: 8px;
}

.tb-layout {
  display: grid;
  grid-template-columns: 46px 1fr;
  grid-template-rows: auto auto;
  gap: 2px 12px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), background 0.2s var(--ease);
}

.tb-layout:hover {
  transform: translateX(2px);
}

.tb-layout.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.tb-layout strong {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-strong);
}

.tb-layout em {
  font-style: normal;
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 999px;
  background: var(--surface-3);
  color: var(--text-dim);
}

.tb-layout small {
  grid-column: 2;
  color: var(--text-dim);
  font-size: 11px;
  line-height: 1.3;
}

.tb-preview {
  grid-row: span 2;
  display: grid;
  gap: 2px;
  width: 46px;
  height: 38px;
  padding: 4px;
  border-radius: 8px;
  background: var(--surface-3);
}

.tb-preview.v1 { grid-template-columns: repeat(3, 1fr); }
.tb-preview.v2 { grid-template-columns: repeat(2, 1fr); }
.tb-preview.v3 { grid-template-columns: repeat(4, 1fr); }

.tb-preview .pv {
  border-radius: 2px;
  background: var(--text-dim);
  opacity: 0.5;
}

.tb-preview .pv.big { grid-column: span 2; opacity: 0.85; }
.tb-preview .pv.wide { grid-column: span 4; opacity: 0.75; }
.tb-layout.active .tb-preview .pv { background: var(--accent); opacity: 0.8; }

.tb-themes {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}

.tb-theme {
  display: grid;
  justify-items: center;
  gap: 4px;
  padding: 8px 2px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--text-dim);
  font-size: 10px;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.tb-theme i {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: transform 0.2s var(--ease);
}

.tb-theme:hover i {
  transform: scale(1.12);
}

.tb-theme.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--text-strong);
}

@media (max-width: 560px) {
  #toolbarHost { right: 14px; bottom: 14px; }
  .tb-fab { width: 50px; height: 50px; }
}