body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: #fff;
    overflow: hidden;
}

.container {
    text-align: center;
    padding: 20px;
    position: relative;
    z-index: 1;
}

h1 {
    font-size: 4em;
    margin-bottom: 20px;
    color: #ffcc00;
}

#countdown {
    font-size: 2em;
    margin-bottom: 20px;
}

.greeting {
    font-size: 1.5em;
    margin-bottom: 30px;
}

button {
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    background-color: #ffcc00;
    border: none;
    border-radius: 5px;
}

.snowfall {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.snowfall::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 10px;
    background-image: linear-gradient(to bottom, transparent, rgba(255,255,255,0.3));
    animation: snow 10s linear infinite;
}

@keyframes snow {
    0% { transform: translateY(0); }
    100% { transform: translateY(100vh); }
}