body {
    font-family: 'Helvetica Neue', sans-serif;
    text-align: center;
    background-color: #f4f4f9;
    color: #333;
}

h1 {
    color: #8B4513; /* SaddleBrown */
    text-shadow: 1px 1px 2px #ccc;
}

#game-container, #upgrades, #factory-upgrade, #controls {
    background-color: white;
    margin: 15px auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    max-width: 500px;
}

#achievements-container {
    background-color: white;
    margin: 15px auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    max-width: 500px;
}

#achievement-list {
    list-style-type: none;
    padding: 0;
}

#achievement-list li {
    background-color: #e9ecef;
    margin: 5px 0;
    padding: 10px;
    border-radius: 5px;
}

#achievement-list li.unlocked {
    background-color: #d4edda; /* Light Green */
    color: #155724; /* Dark Green */
}

#achievement-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #28a745; /* Green */
    color: white;
    padding: 15px 30px;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.5s, bottom 0.5s;
}

#achievement-toast.show {
    opacity: 1;
    bottom: 40px;
}

#achievement-toast.hidden {
    display: none;
}

#cookie {
    width: 150px; /* 少し小さくする */
    cursor: pointer;
    transition: transform 0.1s;
}

#cookie:active {
    transform: scale(0.9);
}

p {
    font-size: 1.2em;
    margin: 10px 0;
}

/* カウンターの数字の色 */
#cookie-count, #grandma-count, #factory-count, #grandma-baked-count, #factory-baked-count, #total-cookies-baked {
    color: #0056b3; /* Dark Blue */
    font-weight: bold;
}

button {
    background-color: #007bff; /* Bright Blue */
    color: white;
    border: none;
    padding: 12px 25px;
    font-size: 1em;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #0056b3; /* Darker Blue */
}

#controls button {
    background-color: #6c757d; /* Gray */
}

#controls button:hover {
    background-color: #5a6268; /* Darker Gray */
}

#grandma-container, #factory-container {
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.grandma-img {
    width: 80px; /* サイズ調整 */
    height: 80px;
    margin: 4px;
}

.factory-img {
    width: 100px; /* サイズ調整 */
    height: 100px;
    margin: 4px;
}

.plus-one {
    position: absolute;
    font-size: 1.5em;
    color: white;
    text-shadow: 2px 2px 4px black;
    animation: float-up 1s ease-out forwards;
    pointer-events: none;
    user-select: none;
}

@keyframes float-up {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-50px);
    }
}

#golden-cookie {
    position: fixed;
    width: 60px;
    height: 60px;
    background-image: url('images/golden_cookie.png');
    background-size: contain;
    cursor: pointer;
    z-index: 2000;
    transition: opacity 0.5s;
    filter: drop-shadow(0 0 10px gold);
}

#golden-cookie.hidden {
    display: none;
    opacity: 0;
}

#bonus-display {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(255, 215, 0, 0.9);
    color: #4a2c00;
    padding: 10px 20px;
    border-radius: 5px;
    border: 2px solid gold;
    box-shadow: 0 0 15px gold;
    z-index: 1001;
    font-size: 1.2em;
    font-weight: bold;
}

#bonus-display.hidden {
    display: none;
}