html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    background-color: #000000;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    color: #ffffff;
    overflow: hidden; /* prevents scrollbars for very large text */
}

/* Index page "DrukMAS" */
.centered {
    font-size: 16vw;  /* very large and scales with viewport width */
    font-weight: bold;
    margin: 0;
    line-height: 1;   /* no extra spacing */
}

/* 404 page heading */
h1 {
    font-size: 16vw;  /* very large 404 heading */
    margin: 0 0 1rem 0;
    line-height: 1;
    color: #ffffff;
}

/* 404 message */
p {
    font-size: 5vw; /* scales with screen size */
    margin: 0 0 2rem 0;
    color: #ffffff;
}

/* 404 button */
a.btn-link {
    color: #ffffff;
    text-decoration: none;
    font-size: 3vw;
    border: 2px solid #ffffff;
    padding: 1vw 3vw;
    border-radius: 5px;
    transition: background 0.3s, color 0.3s;
}

a.btn-link:hover {
    background: #ffffff;
    color: #000000;
}

/* Small screens adjustments */
@media (max-width: 600px) {
    .centered, h1 {
        font-size: 35vw; /* bigger on small screens, scales down automatically */
    }
    p {
        font-size: 6vw;
    }
    a.btn-link {
        font-size: 5vw;
        padding: 2vw 5vw;
    }
}