style.css

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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    height: 100vh;
    background-color: black;
    color: #14ffbc; /* neon green */
    text-shadow: 
      0 0 5px #39FF14,
      0 0 10px #14ffbc,
      0 0 15px #14ffbc,
      0 0 20px #14ffbc,
      0 0 22px #39FF14;
    }

h1 {
    position: absolute;
    top: 0px;
    left: 530px;
    margin: 10px;   
}
#ui {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 10px;
}
.container {
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    grid-template-rows: repeat(16, 1fr);
    gap: 1px;
    width: 500px;
    height: 500px;
    border: 1px solid rgb(246, 246, 246);
}

.container div {
    background-color: #e0dcdc;
}