.snow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.snowflake {
    position: absolute;
    color: lightblue;
    opacity: 0.7;
    animation-name: fall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

.snowflake::before {
    display: block;
    font-size: 20px;
    line-height: 1;
}

.snow-container .snowflake:nth-child(1)::before {
    content: '❆';
    font-size: 24px;
}
.snow-container .snowflake:nth-child(2)::before {
    content: '❅';
    font-size: 28px;
}
.snow-container .snowflake:nth-child(3)::before {
    content: '❆';
    font-size: 20px;
}
.snow-container .snowflake:nth-child(4)::before {
    content: '❅';
    font-size: 32px;
}
.snow-container .snowflake:nth-child(5)::before {
    content: '❆';
    font-size: 24px;
}
.snow-container .snowflake:nth-child(6)::before {
    content: '❅';
    font-size: 28px;
}
.snow-container .snowflake:nth-child(7)::before {
    content: '❆';
    font-size: 20px;
}
.snow-container .snowflake:nth-child(8)::before {
    content: '❅';
    font-size: 32px;
}
.snow-container .snowflake:nth-child(9)::before {
    content: '❆';
    font-size: 24px;
}
.snow-container .snowflake:nth-child(10)::before {
    content: '❅';
    font-size: 28px;
}

.snow-container .snowflake:nth-child(1) {
    left: 5%;
    animation-duration: 12s;
    animation-delay: 0s;
}
.snow-container .snowflake:nth-child(2) {
    left: 15%;
    animation-duration: 15s;
    animation-delay: 2s;
}
.snow-container .snowflake:nth-child(3) {
    left: 25%;
    animation-duration: 10s;
    animation-delay: 4s;
}
.snow-container .snowflake:nth-child(4) {
    left: 35%;
    animation-duration: 18s;
    animation-delay: 1s;
}
.snow-container .snowflake:nth-child(5) {
    left: 45%;
    animation-duration: 13s;
    animation-delay: 3s;
}
.snow-container .snowflake:nth-child(6) {
    left: 55%;
    animation-duration: 16s;
    animation-delay: 5s;
}
.snow-container .snowflake:nth-child(7) {
    left: 65%;
    animation-duration: 11s;
    animation-delay: 0.5s;
}
.snow-container .snowflake:nth-child(8) {
    left: 75%;
    animation-duration: 19s;
    animation-delay: 2.5s;
}
.snow-container .snowflake:nth-child(9) {
    left: 85%;
    animation-duration: 14s;
    animation-delay: 4.5s;
}
.snow-container .snowflake:nth-child(10) {
    left: 95%;
    animation-duration: 17s;
    animation-delay: 1.5s;
}

@keyframes fall {
    0% {
        transform: translateY(-100vh);
        opacity: 0;
    }
    10% {
        opacity: 0.7;
    }
    90% {
        opacity: 0.7;
    }
    100% {
        transform: translateY(100vh);
        opacity: 0;
    }
}