body {
    font-family: 'Roboto', sans-serif;
    background-color: #111;
    color: white;
    text-align: center;
    margin: 0;
    padding: 0;
}

.container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    max-width: 1200px;
    margin: 50px auto;
    padding: 20px;
    border-radius: 15px;
    background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
    box-shadow: 0 0 30px rgba(0, 188, 255, 0.5);
}

#board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px; /* Reduced gap */
    margin: 20px;
    padding: 10px;
    background-color: #3a3a3a;
    border: 4px solid #00bfff;
    border-radius: 15px;
    box-shadow: 0 0 20px #00bfff;
    width: 420px; /* Adjusted width */
    height: 420px; /* Adjusted height */
}

.cell {
    width: 130px;
    height: 130px;
    background-color: #4a4a4a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border: 2px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cell:hover {
    background-color: #5a5a5a;
    box-shadow: 0 0 15px #00bfff;
}

.cell.X {
    color: red;
    text-shadow: 0 0 10px red;
}

.cell.O {
    color: blue;
    text-shadow: 0 0 10px blue;
}

#restart {
    margin-top: 20px;
    padding: 15px 30px;
    font-size: 1.5rem;
    color: white;
    background-color: #00bfff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s;
    width: 100%;
}

#restart:hover {
    background-color: #0094cc;
    transform: scale(1.05);
}

#scoreboard {
    padding: 20px;
    background-color: #3a3a3a;
    border: 4px solid #00bfff;
    border-radius: 15px;
    box-shadow: 0 0 20px #00bfff;
    width: 400px;
}

#scoreboard h2 {
    margin: 0;
    font-size: 2.5rem;
    text-align: right;
    text-shadow: 1px 1px 5px rgba(0, 188, 255, 0.8);
}

#scoreboard table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

#scoreboard th, #scoreboard td {
    padding: 15px;
    border: 2px solid #00bfff;
    text-align: center;
    font-size: 1.8rem;
}

#scoreboard th {
    background-color: #00bfff;
    color: black;
}

#notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: rgba(0, 188, 255, 0.8);
    color: black;
    padding: 10px 20px;
    border-radius: 5px;
    display: none;
    font-size: 1.8rem;
    z-index: 100;
    box-shadow: 0 0 10px #00bfff;
    transition: opacity 0.5s ease;
}