/* ==========================================================================
   Site preferences — theme toggle + language switcher.
   Built entirely on tokens already defined in style.css (--liquid-glass-*,
   --accent*, --grad, --text, --muted) so it re-themes for free and matches
   the existing glass-nav / liquid-nav visual language. Namespaced under
   .pref-* — cannot collide with anything else on the page.

   Two mount points:
   - Inside the existing <nav class="glass-nav"> on index.html (the only
     page that has a top nav) — .pref-controls sits directly in its flex row.
   - A small standalone floating pill (.pref-bar) on services/blog/contact,
     which have no top header at all — same internal markup, same visual
     language, positioned where glass-nav would be so the controls live in
     the same predictable spot on every page.
   ========================================================================== */

.pref-bar {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 150;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pref-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---- direct call button (shared: floating .pref-bar on subpages AND
   the top .glass-nav on index.html both include this same component) -- */
.call-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--accent-4);
  color: #04241f;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 10px 24px -6px rgba(45, 212, 191, .55);
  transition: transform .25s, box-shadow .25s, background .3s;
}

.call-btn svg { width: 15px; height: 15px; flex-shrink: 0; }

.call-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -6px rgba(45, 212, 191, .7);
}

@media (max-width: 520px) {
  .call-btn { width: 38px; height: 38px; padding: 0; justify-content: center; border-radius: 50%; }
  .call-btn span { display: none; }
}

/* ---- header auth button (Login/Register — one button, one page) ------- */
.auth-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--grad);
  color: #04122e;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 10px 24px -6px rgba(93, 139, 255, .5);
  transition: transform .25s, box-shadow .25s;
}
.auth-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.auth-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -6px rgba(93, 139, 255, .65); }

/* ---- floating call FAB (fixed bottom-right, above the footer, on every
   page — deliberately a literal screen-right position, not RTL/LTR
   "inset-inline-end", so it stays in the same corner in every language) */
.call-fab {
  position: fixed;
  right: 22px;
  bottom: 96px;
  z-index: 140;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-4);
  color: #04241f;
  box-shadow: 0 14px 30px -8px rgba(45, 212, 191, .6);
  transition: transform .3s var(--ease-out-strong, cubic-bezier(.23,1,.32,1)), box-shadow .3s;
  animation: fabPulseRing 2.6s ease-out infinite;
}
.call-fab svg { width: 24px; height: 24px; }
.call-fab:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 18px 36px -8px rgba(45, 212, 191, .75); }
.call-fab:active { transform: scale(.95); }

@keyframes fabPulseRing {
  0% { box-shadow: 0 14px 30px -8px rgba(45, 212, 191, .6), 0 0 0 0 rgba(45, 212, 191, .45); }
  70% { box-shadow: 0 14px 30px -8px rgba(45, 212, 191, .6), 0 0 0 14px rgba(45, 212, 191, 0); }
  100% { box-shadow: 0 14px 30px -8px rgba(45, 212, 191, .6), 0 0 0 0 rgba(45, 212, 191, 0); }
}

@media (max-width: 900px) {
  /* Bottom liquid-nav is present on small screens — sit above it too. */
  .call-fab { bottom: 108px; right: 16px; width: 50px; height: 50px; }
  .call-fab svg { width: 21px; height: 21px; }
}

@media (prefers-reduced-motion: reduce) {
  .call-fab { animation: none; }
}

/* ---- theme toggle -------------------------------------------------------- */
.theme-toggle {
  position: relative;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--liquid-glass-border);
  background: var(--liquid-glass-bg);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  transition: background .5s cubic-bezier(.22, 1, .36, 1), border-color .5s, transform .3s cubic-bezier(.34, 1.56, .64, 1);
}

.theme-toggle:hover {
  background: var(--liquid-glass-bg-hover);
  border-color: var(--liquid-glass-border-hover);
}

.theme-toggle:active {
  transform: scale(.9);
}

.theme-toggle::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(122, 240, 255, .5), transparent 70%);
  opacity: 0;
  z-index: -1;
}

.theme-toggle.is-flipping::before {
  animation: theme-toggle-pulse .6s ease-out;
}

@keyframes theme-toggle-pulse {
  0% {
    opacity: .8;
    transform: scale(.4);
  }

  100% {
    opacity: 0;
    transform: scale(1.8);
  }
}

.theme-toggle__icon {
  position: absolute;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  transition: opacity .45s cubic-bezier(.22, 1, .36, 1), transform .5s cubic-bezier(.22, 1, .36, 1);
}

.theme-toggle__icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle__icon--moon {
  color: var(--accent-2);
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle__icon--sun {
  color: #ffb84d;
  opacity: 0;
  transform: rotate(-90deg) scale(.4);
}

[data-theme="light"] .theme-toggle__icon--moon {
  opacity: 0;
  transform: rotate(90deg) scale(.4);
}

[data-theme="light"] .theme-toggle__icon--sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ---- language switch ------------------------------------------------------ */
.lang-switch {
  position: relative;
}

.lang-switch__trigger {
  height: 38px;
  padding-inline: 12px 8px;
  border-radius: 999px;
  border: 1px solid var(--liquid-glass-border);
  background: var(--liquid-glass-bg);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: background .5s cubic-bezier(.22, 1, .36, 1), border-color .5s;
}

.lang-switch__trigger:hover,
.lang-switch.is-open .lang-switch__trigger {
  background: var(--liquid-glass-bg-hover);
  border-color: var(--liquid-glass-border-hover);
}

.lang-switch__chevron {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .35s cubic-bezier(.22, 1, .36, 1);
}

.lang-switch.is-open .lang-switch__chevron {
  transform: rotate(180deg);
}

.lang-switch__menu {
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-end: 0;
  min-width: 148px;
  padding: 6px;
  border-radius: 18px;
  background: var(--liquid-glass-bg-hover);
  border: 1px solid var(--liquid-glass-border);
  backdrop-filter: blur(var(--liquid-glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--liquid-glass-blur)) saturate(160%);
  box-shadow: 0 20px 50px -18px rgba(0, 0, 0, .5), inset 0 1px 0 var(--liquid-glass-highlight);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transform-origin: top center;
  opacity: 0;
  transform: translateY(-8px) scale(.94);
  pointer-events: none;
  transition: opacity .28s cubic-bezier(.22, 1, .36, 1), transform .32s cubic-bezier(.22, 1, .36, 1);
}

.lang-switch.is-open .lang-switch__menu {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.lang-switch__option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: none;
  background: none;
  color: var(--muted);
  font-family: 'Vazirmatn', sans-serif;
  font-size: 13.5px;
  font-weight: 600;
  text-align: start;
  cursor: pointer;
  transition: background .25s ease, color .25s ease;
}

.lang-switch__option:hover {
  background: var(--glass);
  color: var(--text);
}

.lang-switch__option.is-active {
  color: var(--text);
  background: linear-gradient(135deg, rgba(122, 240, 255, .16), rgba(157, 107, 255, .12));
}

.lang-switch__option svg {
  width: 15px;
  height: 15px;
  stroke: var(--accent-2);
  fill: none;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  flex-shrink: 0;
  transition: opacity .2s ease;
}

.lang-switch__option.is-active svg {
  opacity: 1;
}

@media (max-width: 900px) {
  .pref-bar {
    top: 14px;
  }

  .lang-switch__trigger {
    padding-inline: 10px 6px;
  }
}

@media (prefers-reduced-motion: reduce) {

  .theme-toggle,
  .theme-toggle__icon,
  .theme-toggle::before,
  .lang-switch__chevron,
  .lang-switch__menu {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}