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

body {
    min-height: 100vh;
    background-color: #0a0a0a;
    color: #ffffff;
    font-family: "Times New Roman", Times, serif;
}

#grid-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 270px;
    overflow: hidden;
    z-index: -1;
}

#grid-container {
    display: grid;
    grid-template-rows: repeat(9, 30px);
    grid-auto-columns: 30px;
}

.cell {
    width: 30px;
    height: 30px;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.2);
    transition: background-color 1.2s ease;
}

.header {
    position: relative;
    z-index: 1;
    width: 660px;
    height: 660px;
    margin-top: 30px;
    margin-left: 30px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 16px;
    box-shadow: inset 0 0 0 1px rgb(44, 250, 3);
}

.header img {
    position: relative;
    z-index: 1;
    max-width: 660px;
    margin-top: 60px;
    margin-left: 90px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 16px;
}

.content {
    position: relative;
    padding-top: 310px;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}