* {
        box-sizing: border-box;
        font-family: "Poppins", sans-serif;
    }
    body {
        background: #121212;
        color: #fff;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100vh;
    }
    h1 {
        margin-bottom: 10px;
        background: linear-gradient(90deg,rgba(255, 5, 5, 1) 0%, rgba(88, 83, 237, 1) 100%);  
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .mode {
        margin-bottom: 20px;
    }
    button {
        background: #17e744;
        color: white;
        border: none;
        padding: 10px 20px;
        margin: 5px;
        font-size: 16px;
        border-radius: 10px;
        cursor: pointer;
        transition: 0.3s;
    }
    button:hover {
        background: #ec1515;
    }
    .board {
        display: grid;
        grid-template-columns: repeat(3, 100px);
        grid-template-rows: repeat(3, 100px);
        gap: 10px;
    }
    .cell {
        width: 100px;
        height: 100px;
        background: #1f1f1f;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 48px;
        border-radius: 15px;
        cursor: pointer;
        transition: 0.3s;
    }
    .cell:hover {
        background: #2a2a2a;
    }
    .status {
        margin-top: 20px;
        font-size: 20px;
        font-weight: bold;
    }