body {
    font-family: 'Noto Sans', sans-serif;
    /* WebフォントNoto Sansを使用 */
    background-color: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 0;
}

button {
    background-color: #28a745;
    /* 緑色に変更 */
    color: #FFF;
    padding: 10px 20px;
    border: 0;
    border-radius: 4px;
    font-size: 1em;
    cursor: pointer;
    display: block;
    margin: 20px auto;
}

#buttons {
    text-align: center;
}

#loading {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #ff5722;
    animation: spin 1s ease infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.promo-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}

.promo-header {
    background-color: #ff5722;
    color: #FFF;
    padding: 20px;
    border-radius: 10px;
}

.promo-header h1 {
    margin: 0;
    font-size: 1.5em;
}

.promo-header p {
    margin: 10px 0;
}

.promo-header button {
    background-color: #FFF;
    color: #ff5722;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

.promo-section {
    background-color: #FFF;
    padding: 20px;
    margin: 20px 0;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.promo-section h2 {
    margin-top: 0;
    color: #ff5722;
}

.promo-section ul {
    text-align: left;
    padding-left: 20px;
}

.promo-section ul li {
    margin: 10px 0;
}

.premium-plan .plan-details {
    text-align: center;
}

.plan-details .price {
    font-size: 2.5em;
    margin: 0;
    font-weight: bold;
}

.plan-details .price-small {
    font-size: 2em;
    margin: 0;
    font-weight: bold;
}

.plan-details .price-sub {
    font-size: 1em;
    color: #888;
}

.premium-plan button {
    background-color: #28a745;
    /* 緑色に変更 */
    color: #FFF;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 20px;
}

.circular-image {
    border-radius: 50%;
    width: 300px;
    height: 300px;
    object-fit: cover;
}

.premium-plan p {
    font-size: 0.9em;
    color: #555;
    line-height: 1.6;
    margin: 10px 0;
}

.premium-plan a {
    color: #777;
    /* グレーに変更 */
    text-decoration: none;
    border-bottom: 1px dashed #777;
    /* 下点線を追加 */
}

.premium-plan a:hover {
    color: #555;
    /* ホバー時の色を少し濃くする */
    border-bottom: 1px solid #555;
    /* ホバー時の線を実線にする */
}

.premium-plan .powered-by {
    margin-top: 20px;
    font-size: 0.8em;
    color: #777;
}

/* 新規追加部分 */
.carousel img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    cursor: pointer;
}

#closeButton {
    background-color: #ff5722;
    /* 赤色に変更 */
    color: #FFF;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

#closeButton:hover {
    background-color: #e64a19;
    /* 少し濃い赤色 */
}

.payment-complete .container {
    text-align: center;
    padding: 50px;
    max-width: 600px;
    margin: 0 auto;
    background-color: #FFF;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.payment-complete h1 {
    color: #ff5722;
    font-size: 1.5em;
    margin-bottom: 20px;
}

.payment-complete p {
    font-size: 1em;
    color: #555;
    margin-bottom: 30px;
}