.relationship-particle-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: visible;
    z-index: 1000;
}

.relationship-particle {
    position: absolute;
    pointer-events: none;
    opacity: 0;
    font-size: 18px;
    transform: translate3d(0, 0, 0) scale(0.8);
    animation-name: relationship-particle-float;
    animation-duration: 4s;
    animation-fill-mode: forwards;
    animation-timing-function: cubic-bezier(0.22, 0.61, 0.36, 1);
    will-change: transform, opacity;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

.relationship-particle i {
    display: inline-block;
    color: inherit;
}

.relationship-particle--love-positive { color: #ff6fae; }
.relationship-particle--love-negative { color: #4f4f4f; }
.relationship-particle--trust-positive { color: #7bd4ff; }
.relationship-particle--trust-negative { color: #ff8a94; }
.relationship-particle--opinion-positive { color: #8ce99a; }
.relationship-particle--opinion-negative { color: #ff7f7f; }

@keyframes relationship-particle-float {
    0% {
        opacity: 0;
        transform: translate3d(
                calc(var(--particle-dx, 0px) * 0.1),
                calc(var(--particle-dy, -120px) * 0.1),
                0
        )
        scale(0.7)
        rotate(calc(var(--particle-rotate, 0deg) * 0.3));
    }
    5% {
        opacity: 1;
        transform: translate3d(
                calc(var(--particle-dx, 0px) * 0.18),
                calc(var(--particle-dy, -120px) * 0.18),
                0
        )
        scale(1.05)
        rotate(calc(var(--particle-rotate, 0deg) * 0.6));
    }
    100% {
        opacity: 0;
        transform: translate3d(
                var(--particle-dx, 0px),
                calc(var(--particle-dy, -120px)),
                0
        )
        scale(1.25)
        rotate(calc(var(--particle-rotate, 0deg) + 30deg));
    }
}