body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f2f5f8;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.maintenance-container {
    background-color: #ffffff;
    max-width: 640px;
    width: 90%;
    padding: 30px;
    border: 1px solid #e0e4e8;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
}

p {
    font-size: 1rem;
    line-height: 1.7;
    color: #4b5563;
    margin-bottom: 20px;
}

.sns-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 25px;
}

.sns-btn {
    display: inline-block;
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 6px;
    color: #fff;
    transition: transform 0.2s, opacity 0.2s;
    font-weight: 500;
}

.sns-btn:hover {
    transform: translateY(-3px);
    opacity: 0.9;
}

.youtube {
    background-color: #FF0000;
}

.instagram {
    background: linear-gradient(135deg, #feda75, #fa7e1e, #d62976, #962fbf, #4f5bd5);
}

footer {
    font-size: 0.85rem;
    color: #9ca3af;
    margin-top: 30px;
}

@media (max-width: 600px) {
    .maintenance-container {
        padding: 20px;
    }

    h1 {
        font-size: 1.4rem;
    }

    p {
        font-size: 0.95rem;
    }

    .sns-btn {
        width: 100%;
        padding: 8px 0;
    }
}
.main-image {
    max-width: 250px;
    width: auto;
    height: auto;
    border-radius: 8px;
    display: block;
    opacity: 0.9;
    margin: 0 auto;
}

.logo {
    max-width: 180px;
    height: auto;
    margin: 0 auto 20px auto; /* 中央寄せ */
    display: block;
}

h1 {
    margin-top: 15px; /* 画像とのバランスを調整 */
}