@import url('https://fonts.googleapis.com/css2?family=Anton&display=swap');

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background-color: #111;
    font-family: 'Anton', sans-serif;
    overflow: hidden;
    display: flex;
    flex-wrap: wrap;
}

.quadrant {
    width: 50%;
    height: 50%;
    position: relative;
    overflow: hidden;
    box-sizing: border-box;
}

/* Glass borders */
.quadrant::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0; left: 0;
    box-shadow: inset 0 0 20px rgba(255,255,255,0.1);
    pointer-events: none;
}

/* Diagonal slice line */
body::after {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    width: 2px; height: 100%;
    background: rgba(255,255,255,0.2);
}
body::before {
    content: '';
    position: absolute;
    top: 50%; left: 0;
    width: 100%; height: 2px;
    background: rgba(255,255,255,0.2);
}

.target {
    position: absolute;
    font-size: 8rem;
    color: #fff;
    margin: 0;
    letter-spacing: 10px;
    white-space: nowrap;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
    /* Set initial position to center of quadrant */
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.top-right .target { color: #f0f; text-shadow: 0 0 10px #f0f; }
.bottom-left .target { color: #0ff; text-shadow: 0 0 10px #0ff; }
.bottom-right .target { color: #ff0; text-shadow: 0 0 10px #ff0; }