body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #2c3e50;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: white;
}

#game-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#score-board {
    font-size: 24px;
    margin-bottom: 10px;
}

#game-board {
    position: relative;
    width: 400px;
    height: 400px;
    background-color: #34495e;
    border: 5px solid #ecf0f1;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

.snake-segment {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #2ecc71;
    border: 1px solid #27ae60;
    box-sizing: border-box;
}

.snake-head {
    background-color: #27ae60;
    z-index: 2;
}

.food {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #e74c3c;
    border-radius: 50%;
    z-index: 1;
}

#game-over-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

#game-over-overlay h1 {
    font-size: 48px;
    margin: 0;
}

#game-over-overlay p {
    font-size: 24px;
    margin: 20px 0;
}

#restart-button {
    padding: 10px 20px;
    font-size: 18px;
    background-color: #2ecc71;
    border: none;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#restart-button:hover {
    background-color: #27ae60;
}

.hidden {
    display: none !important;
}