#mathbrain-celebration-layer,
.mathbrain-celebration-layer {
    position: fixed;
    inset: 0;
    z-index: 9000;
    pointer-events: none;
    overflow: hidden;
}

.mb-celebration-pulse {
    position: fixed;
    left: 50%;
    top: 48%;
    width: 120px;
    height: 120px;
    margin: -60px 0 0 -60px;
    border-radius: 999px;
    border: 2px solid rgba(37, 99, 235, 0.22);
    background: radial-gradient(circle, rgba(34, 197, 94, 0.18), rgba(34, 197, 94, 0));
    opacity: 0;
    animation: mbCelebrationPulse var(--mb-celebration-duration, 650ms) ease-out forwards;
}

.mb-celebration-particles {
    position: fixed;
    left: 50%;
    top: 42%;
    width: 1px;
    height: 1px;
    pointer-events: none;
}

.mb-celebration-particle {
    position: absolute;
    left: 0;
    top: 0;
    width: var(--mb-size, 6px);
    height: var(--mb-size, 6px);
    border-radius: 999px;
    background: hsl(var(--mb-hue, 210), 82%, 58%);
    opacity: 0;
    transform: translate3d(0, 0, 0) rotate(0deg);
    animation: mbCelebrationParticle var(--mb-celebration-duration, 1200ms) cubic-bezier(0.16, 0.84, 0.38, 1) var(--mb-delay, 0ms) forwards;
}

.mb-celebration-small_confetti .mb-celebration-particle,
.mb-celebration-medium_confetti .mb-celebration-particle {
    border-radius: 2px;
}

.mb-celebration-sparkle .mb-celebration-particle {
    box-shadow: 0 0 12px hsla(var(--mb-hue, 210), 82%, 58%, 0.55);
}

.mb-celebration-fireworks {
    top: 38%;
}

.mb-celebration-fireworks .mb-celebration-particle {
    box-shadow: 0 0 14px hsla(var(--mb-hue, 210), 90%, 58%, 0.62);
}

.mb-celebration-expanded-particles {
    top: 46%;
}

@keyframes mbCelebrationPulse {
    0% {
        opacity: 0;
        transform: scale(0.72);
    }
    24% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: scale(1.45);
    }
}

@keyframes mbCelebrationParticle {
    0% {
        opacity: 0;
        transform: translate3d(0, 0, 0) rotate(0deg) scale(0.72);
    }
    12% {
        opacity: 1;
    }
    72% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate3d(var(--mb-x, 0), var(--mb-y, 0), 0) rotate(var(--mb-rotate, 180deg)) scale(0.82);
    }
}

@media (prefers-reduced-motion: reduce) {
    .mb-celebration-particle {
        display: none;
    }

    .mb-celebration-pulse {
        animation-duration: 420ms;
        background: radial-gradient(circle, rgba(37, 99, 235, 0.12), rgba(37, 99, 235, 0));
    }
}