body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    color: #fff;
    font-family: 'Courier New', Courier, monospace;
}
/* =============================================
   Constriuction page 
   ============================================= */
/* CRT Screen */
.crt-container {
    position: relative;
    width: 90vw;
    height: 90vh;
    max-width: 1000px;
    max-height: 750px;
    background: #222;
    border: 15px solid #333;
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 50px rgba(0,0,0,1);
}
/* Geometry */
.test-pattern {
    position: relative;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, #888 20%, #444 70%);
    display: flex;
    justify-content: center;
    align-items: center;
}
/* Central Target */
.circle-outer {
    width: 60vh;
    height: 60vh;
    border: 5px solid #000;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.1) 10px, rgba(0,0,0,0.1) 20px);
}
/* Crosshairs */
.line-v { position: absolute; width: 2px; height: 100%; background: #000; left: 50%; }
.line-h { position: absolute; height: 2px; width: 100%; background: #000; top: 50%; }
/* Text Boxes */
.content-box {
    position: relative;
    z-index: 5;
    background: #000;
    padding: 20px;
    border: 4px double #fff;
    text-align: center;
}
h1 {
    margin: 0;
    font-size: 2rem;
    letter-spacing: 10px;
    text-transform: uppercase;
}
.sub-text {
    margin-top: 10px;
    font-size: 0.8rem;
    color: #aaa;
}
/* CRT Scanline Overlay */
.scanlines {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%);
    background-size: 100% 4px;
    z-index: 10;
    pointer-events: none;
}
/* =============================================
   Constriuction page end 
   ============================================= */