* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
}

.matrix-background {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.enter-button {
    position: absolute;
    top: 50%;         /* Center vertically */
    left: 50%;        /* Center horizontally */
    transform: translate(-50%, -50%);  /* Adjust to center exactly */
    background-color: grey;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    display: none;    /* Start hidden, appear after 3s */
}

.enter-button a {
    color: white;
    text-decoration: none;
}

/* Mobile adjustments */
@media (max-width: 600px) {
    .enter-button {
        font-size: 1.2rem;
        padding: 10px 20px;
    }
}