clock_css.css

body {
    background-color: black;
    color: white;
    font-family: Arial, sans-serif;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
}

.date {
    font-size: 42px;
    margin-bottom: 10px;
    white-space: nowrap;
}

.time {
    font-size: 96px;
    font-weight: bold;
    margin-bottom: 10px;
}

.countdown {
    font-size: 42px;
    white-space: nowrap;
}

.button-container {
    align-self: center;
}

.fullscreen-button {
    display: inline-block;
    width: auto;
    background-color: black;
    color: white;
    padding: 10px 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    font-size: 16px;
    margin: 50px 0;
}

.fullscreen-button.hide {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.fullscreen-button:hover {
    opacity: 1;
}

* {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}
.particle {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: #fff;
    border-radius: 50%;
    z-index: 1000;
    pointer-events: none;
    animation-name: shooting-star;
    animation-duration: 1s;
    animation-timing-function: ease-out;
    animation-fill-mode: forwards;
}
@keyframes shooting-star {
    from {
        transform: translate(-100%, -100%);
    }
    to {
        transform: translate(200%, 200%);
        opacity: 0;
    }
}