/* ============================================================
   CALL US — FLOATING CONTACT FAB
   Vertical Column Layout
   fab.css
   ============================================================ */

/* ============================================================
   01 — WRAPPER
   ============================================================ */
.fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;

  --fab-size: 64px;
  --item-size: 50px;
  --item-gap: 12px;   /* فاصله بین آیکون‌ها */
}

/* ============================================================
   02 — BACKDROP
   ============================================================ */
.fab__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease);
  z-index: -1;
}

.fab.is-open .fab__backdrop {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================================
   03 — STACK (ستون آیکون‌ها)
   ============================================================ */
.fab__stack {
  position: absolute;
  bottom: 100%;       /* از بالای FAB شروع می‌شه */
  right: 0;
  margin-bottom: 0.75rem;

  display: flex;
  flex-direction: column;
  gap: var(--item-gap);
  align-items: flex-end;   /* راست‌چین */
  pointer-events: none;
}

/* ============================================================
   04 — ITEMS (آیکون‌های شبکه‌ها)
   ============================================================ */
.fab__item {
  position: relative;
  width: var(--item-size);
  height: var(--item-size);
  flex-shrink: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  border-radius: 50%;
  background: rgba(20, 20, 20, 0.92);
  border: 1px solid rgba(212, 180, 140, 0.35);
  color: var(--gold);
  text-decoration: none;

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);

  /* حالت بسته: پایین، محو */
  opacity: 0;
  transform: translateY(20px) scale(0.5);
  pointer-events: none;

  transition:
    transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1),
    opacity 0.35s ease,
    background 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;

  /* تأخیر بر اساس شماره */
  transition-delay: calc(var(--i) * 0.06s);
  will-change: transform, opacity;
}

/* حالت باز: پایین‌به‌بالا با stagger */
.fab.is-open .fab__item {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* hover */
.fab__item:hover {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
  box-shadow: 0 12px 30px rgba(212, 180, 140, 0.5);
  transform: translateY(0) scale(1.08);
}

.fab__item svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   05 — LABEL (تولتیپ سمت چپ)
   ============================================================ */
.fab__item::after {
  content: attr(data-label);
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  padding: 0.35rem 0.7rem;
  background: rgba(10, 10, 10, 0.95);
  border: 1px solid rgba(212, 180, 140, 0.3);
  color: var(--bone);
  font-family: 'General Sans', sans-serif;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s var(--ease);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.fab.is-open .fab__item:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* ============================================================
   06 — TRIGGER BUTTON
   ============================================================ */
.fab__trigger {
  position: relative;
  width: var(--fab-size);
  height: var(--fab-size);
  border-radius: 50%;
  border: 1px solid rgba(212, 180, 140, 0.5);
  background:
    linear-gradient(135deg, rgba(45, 90, 61, 0.95), rgba(45, 90, 61, 0.7));
  color: var(--gold);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;

  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);

  box-shadow:
    0 20px 50px rgba(0, 0, 0, 0.5),
    0 0 0 0 rgba(212, 180, 140, 0.4);

  transition:
    transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.4s ease,
    background 0.4s ease;
  z-index: 3;
  overflow: visible;
}

.fab__trigger:hover {
  transform: scale(1.08);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.6),
    0 0 0 8px rgba(212, 180, 140, 0.1);
}

.fab.is-open .fab__trigger {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold);
}

/* پالس‌ها */
.fab__trigger-ring {
  position: absolute;
  inset: -6px;
  border: 1px solid rgba(212, 180, 140, 0.5);
  border-radius: 50%;
  pointer-events: none;
  animation: fabPulse 3s ease-out infinite;
}

.fab__trigger-ring--2 {
  animation-delay: 1.5s;
}

@keyframes fabPulse {
  0%   { transform: scale(0.85); opacity: 0.9; }
  100% { transform: scale(1.6);  opacity: 0; }
}

/* آیکون‌های trigger (chat / close) */
.fab__trigger-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
    opacity 0.3s ease;
}

.fab__trigger-icon--close {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

.fab.is-open .fab__trigger-icon--open {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

.fab.is-open .fab__trigger-icon--close {
  opacity: 1;
  transform: rotate(0) scale(1);
}

/* ============================================================
   07 — RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .fab {
    bottom: 1.25rem;
    right: 1.25rem;
    --fab-size: 56px;
    --item-size: 44px;
    --item-gap: 10px;
  }

  .fab__item::after {
    display: none;   /* روی موبایل label نشون نده */
  }
}

/* ============================================================
   08 — REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .fab__trigger-ring {
    animation: none;
  }
  .fab__item {
    transition: opacity 0.2s ease;
  }
}