body {
    margin: 0;
    font-family: sans-serif;
    background-color: #c0c0c0; /* Classic grey background */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#game-container {
    background-color: #c0c0c0;
    border: 4px solid;
    border-color: #fff #808080 #808080 #fff;
    padding: 10px;
}

#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #c0c0c0;
    border: 4px solid;
    border-color: #808080 #fff #fff #808080;
    padding: 5px;
    margin-bottom: 10px;
}

.counter {
    background-color: #000;
    color: #ff0000;
    font-family: 'Courier New', Courier, monospace;
    font-size: 2em;
    padding: 0 5px;
    border: 2px inset #808080;
}

#reset-button {
    font-size: 2em;
    width: 50px;
    height: 50px;
    border: 4px solid;
    border-color: #fff #808080 #808080 #fff;
    background-color: #c0c0c0;
    cursor: pointer;
}

#reset-button:active {
    border-color: #808080 #fff #fff #808080;
}

#game-board {
    display: grid;
    border: 4px solid;
    border-color: #808080 #fff #fff #808080;
}

.cell {
    width: 30px;
    height: 30px;
    background-color: #c0c0c0;
    border: 3px solid;
    border-color: #fff #808080 #808080 #fff;
    font-size: 1.5em;
    font-weight: bold;
    text-align: center;
    line-height: 30px;
    cursor: pointer;
}

.cell.revealed {
    border: 1px solid #808080;
    background-color: #bdbdbd;
}

.cell.c1 { color: #0000ff; }
.cell.c2 { color: #008000; }
.cell.c3 { color: #ff0000; }
.cell.c4 { color: #000080; }
.cell.c5 { color: #800000; }
.cell.c6 { color: #008080; }
.cell.c7 { color: #000000; }
.cell.c8 { color: #808080; }