/* =========================================================
   BOTÃO FLUTUANTE DO WHATSAPP
   ========================================================= */

.whatsapp-btn {
    --wa-green: #25d366;
    position: fixed;
    right: clamp(18px, 4vw, 32px);
    bottom: clamp(18px, 4vw, 34px);
    z-index: 900;
    display: flex;
    align-items: center;
    transition: transform var(--t-base) var(--ease);
}

.whatsapp-btn:hover {
    transform: scale(1.05);
}

.whatsapp-btn-tooltip {
    margin-right: 14px;
    padding: 10px 18px;
    background-color: var(--color-white);
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: all var(--t-base) var(--ease);
}

.whatsapp-btn-title {
    font-size: 0.8125rem;
    color: var(--color-muted);
    line-height: 1.3;
}

.whatsapp-btn-description {
    font-size: 0.875rem;
    font-weight: var(--fw-semibold);
    color: var(--color-ink);
    line-height: 1.3;
}

.whatsapp-btn-icon {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--wa-green);
    border-radius: 50%;
    box-shadow: 0 8px 22px rgba(37, 211, 102, 0.45);
}

/* Anel de pulso discreto */
.whatsapp-btn-icon::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background-color: var(--wa-green);
    z-index: -1;
    animation: waPulse 2.4s var(--ease-out) infinite;
}

@keyframes waPulse {
    0% {
        transform: scale(1);
        opacity: 0.55;
    }

    70%,
    100% {
        transform: scale(1.7);
        opacity: 0;
    }
}

.whatsapp-btn-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-white);
}

.whatsapp-btn:hover .whatsapp-btn-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

@media (max-width: 560px) {
    .whatsapp-btn-tooltip {
        display: none;
    }

    .whatsapp-btn-icon {
        width: 54px;
        height: 54px;
    }

    .whatsapp-btn-icon svg {
        width: 28px;
        height: 28px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .whatsapp-btn-icon::before {
        animation: none;
    }
}