:root {
  --chansen-theme-control-top: 16px;
  --chansen-theme-control-right: 16px;
  --chansen-theme-control-z: 9999;
}

.chansen-theme-control {
  position: fixed;
  top: calc(var(--chansen-theme-control-top, 16px) + env(safe-area-inset-top));
  right: calc(var(--chansen-theme-control-right, 16px) + env(safe-area-inset-right));
  z-index: var(--chansen-theme-control-z, 9999);
  display: flex;
  align-items: center;
  padding: 6px;
  border-radius: 999px;
  border: 1px solid var(--panel-border-color, rgba(255, 255, 255, 0.12));
  background: rgba(11, 13, 16, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.42);
  color: var(--text-body, rgba(255, 255, 255, 0.92));
}

[data-theme="light"] .chansen-theme-control {
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.16);
}

.chansen-theme-control__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
  padding: 0;
}

.chansen-theme-control__btn:hover {
  background: rgba(255, 255, 255, 0.10);
}

[data-theme="light"] .chansen-theme-control__btn:hover {
  background: rgba(15, 23, 32, 0.08);
}

.chansen-theme-control__btn:active {
  transform: translateY(1px);
}

.chansen-theme-control__btn:focus-visible {
  outline: 3px solid rgba(var(--accent-primary-rgb, 92, 165, 255), 0.55);
  outline-offset: 2px;
}

.chansen-theme-control__icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.chansen-theme-control__chevron {
  font-size: 14px;
  transform: translateY(-1px);
  opacity: 0.9;
}

.chansen-theme-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(360px, calc(100vw - 28px));
  border-radius: 18px;
  border: 1px solid var(--panel-border-color, rgba(255, 255, 255, 0.12));
  background: var(--surface-panel, rgba(20, 26, 36, 0.94));
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

[data-theme="light"] .chansen-theme-menu {
  box-shadow: 0 24px 70px rgba(9, 16, 31, 0.18);
}

.chansen-theme-menu[hidden] {
  display: none;
}

.chansen-theme-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 10px;
}

.chansen-theme-menu__title {
  font-weight: 650;
  letter-spacing: 0.01em;
}

.chansen-theme-menu__close {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  transition: background 160ms ease;
  font-size: 20px;
  line-height: 1;
}

.chansen-theme-menu__close:hover {
  background: rgba(255, 255, 255, 0.10);
}

[data-theme="light"] .chansen-theme-menu__close:hover {
  background: rgba(15, 23, 32, 0.08);
}

.chansen-theme-menu__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 0 16px 16px;
}

.chansen-theme-option {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  cursor: pointer;
  border-radius: 14px;
  padding: 12px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
  text-align: left;
  min-height: 44px;
}

[data-theme="light"] .chansen-theme-option {
  background: rgba(15, 23, 32, 0.04);
  border-color: rgba(15, 23, 32, 0.10);
}

.chansen-theme-option:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.10);
}

[data-theme="light"] .chansen-theme-option:hover {
  background: rgba(15, 23, 32, 0.07);
}

.chansen-theme-option[aria-checked="true"] {
  border-color: rgba(var(--accent-primary-rgb, 0, 138, 0), 0.55);
  box-shadow: 0 0 0 2px rgba(var(--accent-primary-rgb, 0, 138, 0), 0.18);
}

.chansen-theme-option__preview {
  width: 16px;
  height: 16px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
  flex: 0 0 auto;
}

[data-theme="light"] .chansen-theme-option__preview {
  box-shadow: inset 0 0 0 1px rgba(15, 23, 32, 0.14);
}

.chansen-theme-option__label {
  font-weight: 650;
  font-size: 0.92rem;
}

@media (max-width: 520px) {
  .chansen-theme-menu__grid {
    grid-template-columns: 1fr;
  }
}