/* The topbar controls: the language menu and the theme toggle. */

#language-switcher {
  position: relative;
  pointer-events: auto;
}

#language-switcher .language-toggle,
#language-switcher .language-option {
  all: unset;
  box-sizing: border-box;
}

#language-switcher .language-toggle {
  width: var(--topbar-button-size);
  height: var(--topbar-button-size);
  display: grid;
  place-items: center;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--toggle-bg);
  color: var(--text);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  cursor: pointer;
  position: relative;
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background 220ms ease;
}

#language-switcher .language-toggle:hover {
  transform: translateY(-2px) scale(1.03);
  border-color: rgba(255, 255, 255, 0.36);
}

#language-switcher .language-toggle:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
}

#language-switcher .language-globe-icon {
  display: block;
  width: 24px;
  height: 24px;
  overflow: visible;
  color: currentColor;
}

#language-switcher .language-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 210px;
  padding: var(--space-12);
  display: none;
  gap: var(--space-8);
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.16), transparent 58%),
    color-mix(in srgb, var(--toggle-bg) 94%, transparent);
  box-shadow:
    0 24px 48px rgba(24, 44, 78, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  opacity: 0;
  transform: translateY(-8px);
  z-index: 16;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

#language-switcher .language-menu[aria-hidden="true"] {
  display: none !important;
  opacity: 0;
  transform: translateY(-8px);
}

#language-switcher.is-open .language-menu,
#language-switcher .language-menu[aria-hidden="false"] {
  display: grid;
  opacity: 1;
  transform: translateY(0);
}

#language-switcher .language-option {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: 20px;
  padding: 14px 16px;
  background:
    linear-gradient(155deg, rgba(255, 255, 255, 0.12), transparent 65%),
    rgba(255, 255, 255, 0.04);
  color: var(--text);
  text-align: left;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 10px 22px rgba(24, 44, 78, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition:
    background 180ms ease,
    color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

#language-switcher .language-option-copy {
  display: grid;
  gap: 3px;
}

#language-switcher .language-option-code {
  font-size: var(--fs-2xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--primary-text);
}

#language-switcher .language-option-name {
  font-size: var(--fs-base);
  font-weight: 700;
  letter-spacing: 0.02em;
}

#language-switcher .language-option-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
  transition:
    transform 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease;
}

#language-switcher .language-option:hover,
#language-switcher .language-option:focus-visible {
  background: color-mix(in srgb, var(--surface-strong) 86%, transparent);
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow:
    0 14px 28px rgba(24, 44, 78, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.16);
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

#language-switcher .language-option.is-active {
  background: color-mix(in srgb, var(--primary) 18%, var(--surface-strong));
  color: var(--text);
  border-color: color-mix(in srgb, var(--primary) 34%, transparent);
}

#language-switcher .language-option.is-active .language-option-mark {
  /* --primary is 2.99:1 on the light background and this sits on a tinted
     chip, so it reads lower still; --primary-text clears 1.4.11 both ways.
     Not the only cue for the selection -- the chip is tinted and aria-pressed
     is set -- but it is the one that is meant to be seen. */
  background: var(--primary-text);
  transform: scale(1.08);
  box-shadow:
    0 0 0 5px color-mix(in srgb, var(--primary) 16%, transparent),
    inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.theme-icon-button {
  width: var(--topbar-button-size);
  height: var(--topbar-button-size);
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--toggle-bg);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  cursor: pointer;
  pointer-events: auto;
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background 220ms ease;
}

.theme-icon-button:hover {
  transform: translateY(-2px) scale(1.03);
  border-color: rgba(255, 255, 255, 0.36);
}

.theme-icon-button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
}

.theme-icon {
  position: relative;
  width: 24px;
  height: 24px;
}

.theme-icon-sun,
.theme-icon-moon {
  position: absolute;
  inset: 0;
  margin: auto;
  transition:
    transform 300ms ease,
    opacity 300ms ease;
}

.theme-icon-sun {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid currentColor;
  color: #f7a531;
  box-shadow:
    0 -12px 0 -8px currentColor,
    0 12px 0 -8px currentColor,
    12px 0 0 -8px currentColor,
    -12px 0 0 -8px currentColor,
    8px 8px 0 -8px currentColor,
    -8px -8px 0 -8px currentColor,
    8px -8px 0 -8px currentColor,
    -8px 8px 0 -8px currentColor;
}

.theme-icon-moon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #f0f6ff;
  transform: scale(0.35) rotate(-30deg);
  opacity: 0;
}

.theme-icon-moon::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  top: -2px;
  left: 6px;
  background: var(--toggle-bg);
}

html.theme-dark .theme-icon-sun {
  transform: scale(0.35) rotate(90deg);
  opacity: 0;
}

html.theme-dark .theme-icon-moon {
  transform: scale(1) rotate(0deg);
  opacity: 1;
}