body {
  --sidebar-slide: 580ms cubic-bezier(.48, .03, .22, 1);
}

#workspace-menu {
  --sidebar-width: min(260px, calc(100% - 76px));
  --menu-left: max(12px, env(safe-area-inset-left));
  --menu-step: 56px;
  --menu-button-size: 48px;
  --menu-pop: 240ms cubic-bezier(.2, .7, .3, 1);
  --menu-top: max(12px, env(safe-area-inset-top));
  --menu-glass-glow: #fffdf6;
  --menu-scrim: #302717;
  --sidebar-hover: #f9efcd;
  --theme-selection: #b78a09;
  position: fixed;
  z-index: 2;
  inset: 0;
  pointer-events: none;
}

:root[data-theme="dark"] #workspace-menu {
  --menu-glass-glow: #201912;
  --menu-scrim: #100d0a;
  --sidebar-hover: #393020;
  --theme-selection: #f4c64c;
}

#workspace-menu.sidebar-open {
  --menu-left: calc(var(--sidebar-width) + 10px);
}

.menu-rail {
  position: absolute;
  top: var(--menu-top);
  left: var(--menu-left);
  z-index: 3;
  transition: left var(--sidebar-slide);
}

.menu-circle {
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 1px;
  width: var(--menu-button-size);
  height: var(--menu-button-size);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--composer-surface);
  color: var(--ink);
  font-size: 12px;
}

.menu-gear {
  position: relative;
  z-index: 1;
  pointer-events: auto;
  color: var(--focus);
  background: var(--control-surface);
}

.menu-circle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.menu-gear svg { width: 23px; height: 23px; transition: transform var(--menu-pop); }
.menu-gear[aria-expanded="true"] svg { transform: rotate(45deg); }

#menu-options .menu-circle {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transform: scale(.6);
  transition: transform var(--menu-pop), opacity 180ms;
  background: var(--glass-fill);
  border-color: var(--glass-border);
  box-shadow: var(--glass-shadow);
  text-shadow: 0 0 4px var(--menu-glass-glow);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

#menu-options .menu-circle:nth-child(1) { --step: 1; }
#menu-options .menu-circle:nth-child(2) { --step: 2; }
#menu-options .menu-circle:nth-child(3) { --step: 3; }
#menu-options .menu-circle:nth-child(4) { --step: 4; }

#menu-options[aria-hidden="false"] .menu-circle {
  pointer-events: auto;
  opacity: 1;
  transform: translateY(calc(var(--step) * var(--menu-step)));
  translate: 0 calc(var(--step) * var(--menu-clearance-offset, 0px));
  transition-delay: calc((var(--step) - 1) * 28ms);
}

#workspace-menu.menu-scrolls #menu-options {
  position: absolute;
  top: var(--menu-button-size);
  left: 0;
  width: var(--menu-step);
  height: var(--menu-available-height);
  overflow: hidden auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  pointer-events: auto;
}

#workspace-menu.menu-scrolls #menu-options .menu-circle { top: calc(-1 * var(--menu-button-size)); }

.menu-gear:hover { background: var(--control-hover); }
#menu-options .menu-circle:hover,
#menu-options .menu-circle[aria-pressed="true"] {
  background: var(--glass-hover);
}
#menu-options .menu-circle[aria-pressed="true"] { border-color: var(--focus); }

.menu-scrim {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  background: var(--menu-scrim);
  opacity: 0;
  transition: opacity var(--sidebar-slide);
}

.sidebar-open .menu-scrim { opacity: .17; pointer-events: auto; }
#workspace-menu ~ main { transition: filter var(--sidebar-slide); }
#workspace-menu.sidebar-open ~ main { filter: blur(3px); }

#workspace-sidebar {
  position: absolute;
  z-index: 2;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  padding: var(--menu-top) 14px max(14px, env(safe-area-inset-bottom));
  border-right: 1px solid var(--line);
  background: var(--surface);
  transform: translateX(-100%);
  transition: transform var(--sidebar-slide);
  overflow: auto;
  overscroll-behavior: contain;
}

.sidebar-open #workspace-sidebar {
  pointer-events: auto;
  transform: translateX(0);
}

.sidebar-header { display: flex; align-items: center; gap: 4px; margin-bottom: 12px; }
.sidebar-header h2 { flex: 1; padding-inline-start: 6px; }
.sidebar-icon, .sidebar-row { min-height: 44px; background: transparent; border: 0; }
.sidebar-icon { width: 44px; border-radius: 50%; font-size: 24px; }
.sidebar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 8px;
  padding: 8px;
  text-align: left;
  overflow-wrap: anywhere;
  border-radius: 10px;
}

.sidebar-row:hover, .sidebar-icon:hover, .sidebar-row[aria-current="true"] { background: var(--sidebar-hover); }
#workspace-sidebar p { margin: 12px 8px; color: var(--muted); font-size: 14px; }
#recent-chats { margin-top: 8px; }

.theme-picker { margin-block: 18px 12px; text-align: center; }
.theme-picker h3 { margin: 0; font-size: 14px; font-weight: 500; }
.theme-choices { display: flex; justify-content: center; gap: 4px; margin-top: 3px; }
.theme-swatch {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
}
.theme-swatch::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 2px solid transparent;
  border-radius: 8px;
  pointer-events: none;
}
.theme-swatch:hover::after { border-color: var(--line); }
.theme-swatch[aria-pressed="true"]::after { border-color: var(--theme-selection); }
.theme-dot {
  width: 18px;
  height: 18px;
  border: 1px solid #9a907a;
  border-radius: 50%;
  background: #fff;
}
.theme-swatch[data-theme-choice="dark"] .theme-dot { background: #171613; }

@media (prefers-reduced-motion: reduce) {
  body { --sidebar-slide: 0ms; }
  #workspace-menu *, #menu-options .menu-circle { transition: none; }
}