/* ============================================================
   دکمه‌های شناور: تماس (FAB) + بازگشت به بالا
   ============================================================ */

/* ===== گروه FAB — گوشه راست پایین ===== */
.fab-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9990;
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
    gap: 12px;
}

/* دکمه اصلی toggle */
.fab-main {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0f766e, #0891b2);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    box-shadow: 0 4px 20px rgba(15,118,110,0.45), 0 2px 8px rgba(0,0,0,0.12);
    transition: transform 0.22s cubic-bezier(.34,1.56,.64,1), box-shadow 0.22s, background 0.22s;
    display: flex;
    align-items: center;
    justify-content: center;
    outline: none;
    /* حلقه pulse برای جلب توجه */
    animation: fab-pulse 2.8s infinite;
}

@keyframes fab-pulse {
    0%   { box-shadow: 0 4px 20px rgba(15,118,110,0.45), 0 0 0 0 rgba(15,118,110,0.35); }
    60%  { box-shadow: 0 4px 20px rgba(15,118,110,0.45), 0 0 0 14px rgba(15,118,110,0); }
    100% { box-shadow: 0 4px 20px rgba(15,118,110,0.45), 0 0 0 0 rgba(15,118,110,0); }
}

.fab-main:hover {
    transform: scale(1.08);
    animation: none;
    box-shadow: 0 6px 26px rgba(15,118,110,0.55);
}

.fab-main.open {
    background: linear-gradient(135deg, #64748b, #475569);
    transform: rotate(45deg);
    animation: none;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

/* ===== دکمه‌های sub ===== */
.fab-item {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    color: #fff;
    text-decoration: none;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 14px rgba(0,0,0,0.18);
    position: relative;
    opacity: 0;
    transform: scale(0.3) translateY(16px);
    pointer-events: none;
    transition: opacity 0.2s, transform 0.22s cubic-bezier(.34,1.56,.64,1), box-shadow 0.18s, filter 0.18s;
    text-decoration: none !important;
}

.fab-container.open .fab-item {
    opacity: 1;
    transform: scale(1) translateY(0);
    pointer-events: all;
}

/* ظهور پله‌ای */
.fab-container.open .fab-item:nth-child(1) { transition-delay: 0.04s; }
.fab-container.open .fab-item:nth-child(2) { transition-delay: 0.09s; }
.fab-container.open .fab-item:nth-child(3) { transition-delay: 0.14s; }

.fab-item:hover {
    transform: scale(1.12) !important;
    box-shadow: 0 6px 20px rgba(0,0,0,0.22);
    color: #fff !important;
}

/* رنگ هر دکمه */
.fab-whatsapp  { background: #25d366; }
.fab-whatsapp:hover  { filter: brightness(1.08); }

.fab-telegram  { background: #229ED9; }
.fab-telegram:hover  { filter: brightness(1.1); }

.fab-phone     { background: linear-gradient(135deg, #0f766e, #0d9488); }
.fab-phone:hover     { filter: brightness(1.1); }

/* ===== Tooltip ===== */
.fab-tooltip {
    position: absolute;
    /* در RTL: سمت چپ دکمه */
    left: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%) translateX(-6px);
    background: rgba(15,23,42,0.9);
    color: #f1f5f9;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 7px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.18s, transform 0.18s;
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    /* مثلث کوچک */
    direction: rtl;
}

.fab-tooltip::after {
    content: '';
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: rgba(15,23,42,0.9);
}

/* در RTL (فارسی/عربی) tooltip سمت چپ */
html[dir="rtl"] .fab-tooltip {
    left: calc(100% + 12px);
    right: auto;
    transform: translateY(-50%) translateX(-6px);
}

html[dir="rtl"] .fab-tooltip::after {
    right: 100%; left: auto;
    border-right-color: rgba(15,23,42,0.9);
    border-left-color: transparent;
}

/* در LTR tooltip سمت راست */
html[dir="ltr"] .fab-tooltip {
    left: auto;
    right: calc(100% + 12px);
    transform: translateY(-50%) translateX(6px);
}

html[dir="ltr"] .fab-tooltip::after {
    left: 100%; right: auto;
    border-right-color: transparent;
    border-left-color: rgba(15,23,42,0.9);
}

.fab-item:hover .fab-tooltip {
    opacity: 1;
    transform: translateY(-50%) translateX(0) !important;
}

/* ===== دکمه بازگشت به بالا — گوشه چپ پایین ===== */
.back-to-top {
    position: fixed;
    bottom: 24px;
    left: 24px;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: rgba(15,118,110,0.88);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    box-shadow: 0 3px 14px rgba(15,118,110,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9989;
    /* پنهان در بالای صفحه */
    opacity: 0;
    transform: translateY(14px);
    pointer-events: none;
    transition: opacity 0.26s, transform 0.26s, background 0.18s, box-shadow 0.18s;
    backdrop-filter: blur(4px);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.back-to-top:hover {
    background: #0f766e;
    box-shadow: 0 6px 20px rgba(15,118,110,0.42);
    transform: translateY(-3px) !important;
}

/* در LTR (انگلیسی) سمت راست */
html[dir="ltr"] .back-to-top {
    left: auto;
    right: 88px;
}

/* ===== موبایل ===== */
@media (max-width: 767px) {
    .fab-container   { bottom: 16px; right: 16px; }
    .back-to-top     { bottom: 16px; left: 16px; }
    .fab-main        { width: 52px; height: 52px; font-size: 1.1rem; }
    .fab-item        { width: 44px; height: 44px; font-size: 1rem; }

    html[dir="ltr"] .back-to-top { right: 76px; left: auto; }
}