.whatsapp-float-premium {
        position: fixed;
        right: 28px;
        bottom: 28px;
        width: 64px;
        height: 64px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        z-index: 9999;

        background: linear-gradient(
            145deg,
            #25D366,
            #128C7E
        );

        box-shadow:
            0 10px 30px rgba(18, 140, 126, 0.35),
            0 4px 10px rgba(0, 0, 0, 0.15);

        transition:
            transform 0.3s ease,
            box-shadow 0.3s ease;
    }

    .whatsapp-icon {
        width: 52px;
        height: 52px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;

        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.3);

        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);

        color: #fff;
        font-size: 29px;

        position: relative;
        z-index: 2;

        transition: transform 0.3s ease;
    }

    .whatsapp-float-premium:hover {
        transform: translateY(-5px) scale(1.05);

        box-shadow:
            0 18px 40px rgba(18, 140, 126, 0.45),
            0 8px 20px rgba(0, 0, 0, 0.18);
    }

    .whatsapp-float-premium:hover .whatsapp-icon {
        transform: rotate(-8deg) scale(1.08);
    }

    /* Effetto pulsante luminoso */
    .whatsapp-pulse {
        position: absolute;
        inset: -5px;
        border-radius: 50%;
        border: 2px solid rgba(37, 211, 102, 0.45);
        animation: whatsappPulse 2.2s infinite;
        pointer-events: none;
    }

    @keyframes whatsappPulse {
        0% {
            transform: scale(0.9);
            opacity: 0.8;
        }

        70% {
            transform: scale(1.25);
            opacity: 0;
        }

        100% {
            transform: scale(1.25);
            opacity: 0;
        }
    }

    /* Tooltip */
    .whatsapp-tooltip {
        position: absolute;
        right: 78px;
        top: 50%;
        transform: translateY(-50%) translateX(10px);

        white-space: nowrap;

        background: #111827;
        color: #fff;

        padding: 10px 15px;
        border-radius: 10px;

        font-size: 14px;
        font-weight: 500;

        opacity: 0;
        visibility: hidden;

        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.18);

        transition:
            opacity 0.25s ease,
            transform 0.25s ease,
            visibility 0.25s ease;
    }

    .whatsapp-tooltip::after {
        content: "";
        position: absolute;
        right: -6px;
        top: 50%;
        transform: translateY(-50%) rotate(45deg);

        width: 12px;
        height: 12px;

        background: #111827;
    }

    .whatsapp-float-premium:hover .whatsapp-tooltip {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%) translateX(0);
    }

    /* Mobile */
    @media (max-width: 600px) {
        .whatsapp-float-premium {
            right: 18px;
            bottom: 18px;
            width: 58px;
            height: 58px;
        }

        .whatsapp-icon {
            width: 48px;
            height: 48px;
            font-size: 26px;
        }

        .whatsapp-tooltip {
            display: none;
        }
    }