:root {
    --kg-wa-size: 60px;
    --kg-wa-gap: 18px;
    --kg-wa-green: #25D366;
    --kg-wa-green-dark: #1ebe57;
    --kg-wa-shadow: 0 12px 28px rgba(0,0,0,.22);
    --kg-wa-font: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.kg-wa-wrap {
    position: fixed;
    right: var(--kg-wa-gap);
    bottom: var(--kg-wa-gap);
    z-index: 2147483000;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* expanding label */
.kg-wa-label {
    font-family: var(--kg-wa-font);
    font-size: 13px;
    line-height: 1.1;
    color: #fff;
    background: rgba(20,20,20,.92);
    padding: 10px 12px;
    border-radius: 14px;
    box-shadow: 0 10px 22px rgba(0,0,0,.18);
    max-width: 0;
    opacity: 0;
    overflow: hidden;
    white-space: nowrap;
    transform: translateX(10px);
    transition: max-width .22s ease, opacity .22s ease, transform .22s ease;
    pointer-events: none;
}

.kg-wa-wrap:hover .kg-wa-label,
.kg-wa-wrap.kg-open .kg-wa-label {
    max-width: 280px;
    opacity: 1;
    transform: translateX(0);
}

.kg-wa-fab {
    position: relative;
    width: var(--kg-wa-size);
    height: var(--kg-wa-size);
    border-radius: 999px;
    background: var(--kg-wa-green);
    box-shadow: var(--kg-wa-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: transform .12s ease, background .12s ease, box-shadow .12s ease;
    will-change: transform;
}

    .kg-wa-fab:hover {
        background: var(--kg-wa-green-dark);
        transform: translateY(-1px);
        box-shadow: 0 14px 32px rgba(0,0,0,.26);
    }

    .kg-wa-fab:active {
        transform: translateY(0) scale(.98);
    }

    .kg-wa-fab svg {
        width: 28px;
        height: 28px;
        fill: #fff;
    }

    /* ripple ring */
    .kg-wa-fab::before {
        content: "";
        position: absolute;
        inset: -10px;
        border-radius: 999px;
        border: 2px solid rgba(37,211,102,.55);
        opacity: 0;
        transform: scale(.75);
        animation: kgWaRipple 2.2s ease-out infinite;
    }
    /* pulse glow */
    .kg-wa-fab::after {
        content: "";
        position: absolute;
        inset: -6px;
        border-radius: 999px;
        background: rgba(37,211,102,.22);
        opacity: .0;
        animation: kgWaPulse 1.8s ease-in-out infinite;
    }
/* subtle wiggle */
.kg-wa-wrap.kg-attn .kg-wa-fab {
    animation: kgWaWiggle 3.2s ease-in-out infinite;
}

@keyframes kgWaRipple {
    0% {
        opacity: 0;
        transform: scale(.75);
    }

    12% {
        opacity: .75;
    }

    55% {
        opacity: .10;
    }

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

@keyframes kgWaPulse {
    0% {
        opacity: 0;
        transform: scale(.92);
    }

    45% {
        opacity: .9;
        transform: scale(1.03);
    }

    100% {
        opacity: 0;
        transform: scale(.92);
    }
}

@keyframes kgWaWiggle {
    0%, 84%, 100% {
        transform: translateY(0);
    }

    88% {
        transform: translateY(-2px) rotate(-3deg);
    }

    92% {
        transform: translateY(0) rotate(3deg);
    }

    96% {
        transform: translateY(-1px) rotate(-2deg);
    }
}

@supports (bottom: env(safe-area-inset-bottom)) {
    .kg-wa-wrap {
        bottom: calc(88px + env(safe-area-inset-bottom));
    }
}

@media (prefers-reduced-motion: reduce) {
    .kg-wa-fab::before, .kg-wa-fab::after, .kg-wa-wrap.kg-attn .kg-wa-fab {
        animation: none !important;
    }

    .kg-wa-label {
        transition: none !important;
    }
}