/* Rain Container */
#rainContainer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 2000;
}

/* Rain streak — translucent glass column */
.raindrop {
    position: absolute;
    width: var(--rain-width, 2px);
    height: var(--rain-height, 22px);
    border-radius: 999px;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.45) 0%,
        rgba(var(--primary-color-rgb), 0.42) 35%,
        rgba(var(--primary-color-rgb), 0.12) 85%,
        transparent 100%
    );
    transform-origin: top;
    will-change: transform, opacity;
    opacity: 0.55;
    filter: drop-shadow(0 0 4px rgba(var(--primary-color-rgb), 0.22));
}

/* Rain falling animation */
@keyframes rain-falling {
    0% {
        transform: translate(var(--start-x), -20px) scaleY(0.5);
        opacity: 0;
    }
    12% {
        opacity: var(--rain-opacity-mid, 0.48);
    }
    50% {
        opacity: var(--rain-opacity-peak, 0.58);
    }
    88% {
        opacity: var(--rain-opacity-mid, 0.48);
    }
    100% {
        transform: translate(var(--end-x), calc(100vh + 20px)) scaleY(1);
        opacity: 0;
    }
}

/* Rain drop animations */
.raindrop {
    animation: rain-falling var(--fall-duration, 1s) linear infinite;
}