.steam-sale-info {
    padding: 15px;
    border-radius: 5px;
    text-align: center;
    font-family: sans-serif;
    margin: 20px 0;
    box-sizing: border-box;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-color: #f9f9f9;
    color: #333;
    border: 2px solid #ccc;
}

.steam-sale-info strong {
    display: block;
    font-size: 1.2em;
    margin-bottom: 5px;
}

.steam-sale-info.is-on-sale-and-next {
    border-color: #4CAF50;
    padding: 0;
}

.steam-sale-info.is-on-sale-and-next .current-sale-info {
    padding: 15px;
    border-bottom: 1px solid #ddd;
}

.steam-sale-info.is-on-sale-and-next a {
    color: #4CAF50;
    text-decoration: none;
    font-weight: bold;
}

.steam-sale-info.is-on-sale-and-next .next-sale-info {
    padding: 15px;
}

.steam-sale-info.is-countdown {
    border-color: #2196F3;
}

.steam-sale-info.is-countdown .countdown-text {
    font-size: 1.8em;
    font-weight: bold;
    display: inline;
    margin-top: 5px;
    color: #2196F3;
}

/* モバイル表示の調整 */
@media (max-width: 768px) {
    .steam-sale-info {
        padding: 10px;
        border: 2px solid #ccc;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    .steam-sale-info.is-on-sale-and-next {
        border-color: #4CAF50;
    }
    .steam-sale-info.is-countdown {
        border-color: #2196F3;
    }
    .steam-sale-info strong {
        font-size: 1.1em;
        margin-bottom: 3px;
    }
    .steam-sale-info span {
        font-size: 0.9em;
    }
    .steam-sale-info.is-on-sale-and-next .current-sale-info,
    .steam-sale-info.is-on-sale-and-next .next-sale-info {
        padding: 10px;
    }
}