.prefs {
  --prefs-bg: var(--canvas, var(--card, #fff));
  --prefs-ink: var(--ink, #1d1d1f);
  --prefs-muted: var(--neutral, var(--muted, #86868b));
  --prefs-line: var(--hairline, var(--line, #e5e5e7));
  --prefs-well: var(--surface, var(--page, #f5f5f7));
  --prefs-ease: var(--ease, cubic-bezier(0.22, 1, 0.36, 1));
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 45;
}

.prefs-toggle {
  display: grid;
  place-items: center;
  width: 3.25rem;
  height: 3.25rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--prefs-line);
  border-radius: 999px;
  background: var(--prefs-bg);
  color: var(--prefs-ink);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: border-color 0.35s var(--prefs-ease), transform 0.35s var(--prefs-ease);
}

.prefs-toggle:hover {
  border-color: var(--prefs-ink);
}

.prefs-toggle svg {
  width: 1.35rem;
  height: 1.35rem;
  transition: transform 0.45s var(--prefs-ease);
}

.prefs.is-open .prefs-toggle svg {
  transform: rotate(40deg);
}

.prefs-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 0.6rem);
  width: min(18.5rem, calc(100vw - 2rem));
  overflow: hidden;
  visibility: hidden;
  opacity: 0;
  transform: translateY(10px);
  transform-origin: bottom right;
  pointer-events: none;
  border: 1px solid transparent;
  border-radius: 1.25rem;
  background: var(--prefs-bg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
  transition:
    opacity 0.35s var(--prefs-ease),
    transform 0.45s var(--prefs-ease),
    visibility 0s linear 0.45s;
}

.prefs.is-open .prefs-panel {
  visibility: visible;
  opacity: 1;
  transform: none;
  pointer-events: auto;
  border-color: var(--prefs-line);
  transition:
    opacity 0.35s var(--prefs-ease),
    transform 0.45s var(--prefs-ease),
    visibility 0s;
}

.prefs-body {
  display: grid;
  gap: 0.85rem;
  padding: 0.95rem;
}

.prefs-body > div {
  display: grid;
  gap: 0.45rem;
}

.prefs-toggle circle {
  fill: var(--prefs-bg);
}

.prefs-kicker {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  color: var(--prefs-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.prefs-kicker svg {
  width: 0.95rem;
  height: 0.95rem;
}

.prefs-seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
  padding: 0.22rem;
  background: var(--prefs-well);
  border-radius: 999px;
}

.prefs-seg button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.55rem;
  margin: 0;
  padding: 0.4rem 0.7rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--prefs-ink);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 0.35s var(--prefs-ease), box-shadow 0.35s var(--prefs-ease);
}

.prefs-seg button svg {
  width: 1rem;
  height: 1rem;
  flex: none;
}

.prefs-seg button[aria-pressed="true"] {
  background: var(--prefs-bg);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

html[data-theme="dark"] .prefs {
  --prefs-well: #000000;
}

html[data-theme="dark"] .prefs-seg button[aria-pressed="true"] {
  background: #3a3a3c;
}

html[data-theme="dark"] .prefs-toggle,
html[data-theme="dark"] .prefs-panel {
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

@media (prefers-reduced-motion: reduce) {
  .prefs-toggle,
  .prefs-toggle svg,
  .prefs-panel,
  .prefs-seg button {
    transition: none;
  }
}