.snow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    overflow: hidden;
}

.snowflake {
    position: absolute;
    top: -100px;
    color: #87CEEB;
    user-select: none;
    pointer-events: none;
    font-size: 1em;
    animation-name: snowfall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    opacity: 0;
    text-shadow: 0 0 8px rgba(135, 206, 235, 0.6), 0 0 15px rgba(173, 216, 230, 0.4);
    filter: drop-shadow(0 0 3px rgba(135, 206, 235, 0.8));
}

@keyframes snowfall {
    0% {
        transform: translateY(-100px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(calc(100vh + 100px)) rotate(360deg);
        opacity: 0;
    }
}


.snowflake.small {
    font-size: 0.8em;
    animation-duration: 8s;
}

.snowflake.medium {
    font-size: 1.2em;
    animation-duration: 10s;
}

.snowflake.large {
    font-size: 1.6em;
    animation-duration: 12s;
}


.snowflake.slow {
    animation-duration: 10s;
}

.snowflake.fast {
    animation-duration: 6s;
}


@keyframes sway {
    0%, 100% {
        transform: translateX(0px);
    }
    25% {
        transform: translateX(15px);
    }
    75% {
        transform: translateX(-15px);
    }
}

.snowflake.sway {
    animation: snowfall linear infinite, sway 4s ease-in-out infinite;
}


@media (max-width: 768px) {
    .snowflake {
        font-size: 0.8em;
    }
    
    .snowflake.small {
        font-size: 0.6em;
    }
    
    .snowflake.medium {
        font-size: 1em;
    }
    
    .snowflake.large {
        font-size: 1.3em;
    }
}


@media (max-width: 480px) {
    .snowflake:nth-child(n+21) {
        display: none;
    }
}


.snow-container {
    animation: fadeInSnow 2s ease-in;
}

@keyframes fadeInSnow {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}


#snow-toggle-btn {
    transition: all 0.2s ease;
    border: 1px solid;
}

#snow-toggle-btn:hover {
    transform: translateY(-1px);
}

#snow-toggle-btn:active {
    transform: translateY(0) scale(0.98);
}


@media (max-width: 640px) {
    #snow-toggle-btn {
        padding: 0.5rem;
        min-width: 2.5rem;
    }
    
    #snow-toggle-btn span {
        display: none !important;
    }
}

@media (max-width: 480px) {
    #snow-toggle-btn {
        padding: 0.4rem;
        min-width: 2.2rem;
    }
    
    #snow-toggle-btn i {
        font-size: 0.9rem;
    }
}


#snow-toggle-btn i {
    transition: transform 0.3s ease;
}

#snow-toggle-btn:hover i {
    transform: rotate(180deg);
}


#snow-toggle-btn.active {
    animation: snowButtonPulse 2s ease-in-out infinite;
}

@keyframes snowButtonPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(59, 130, 246, 0);
    }
}