body {
    margin: 0;
    padding: 0;
    background-color: #2d2d2d;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: white;
    font-family: sans-serif;
    user-select: none; /* 文字選択を防止してゲームっぽくする */
}

#game-container {
    background-color: #333;
    width: 600px;
    height: 400px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px; /* 要素同士の間隔 */
    position: relative;
}

#count-text {
    font-size: 48px;
    font-weight: bold;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.1s;
}

button:active {
    transform: scale(0.95); /* クリック時に少し縮む演出 */
}

#click-btn {
    font-size: 32px;
    padding: 20px 40px;
    background-color: #000;
    color: #0f0;
    border: 2px solid #0f0;
}

.controls {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

#save-btn, #load-btn {
    font-size: 18px;
    padding: 10px 20px;
    color: #333;
}

#save-btn { background-color: #ff0; }
#load-btn { background-color: #0ff; }

#status-text {
    color: #aaa;
    font-size: 14px;
    margin-top: 10px;
}