/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background: #ffffff;
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
    padding-top: 0;
}

.container {
    width: 100%;
    max-width: 800px;
    overflow: hidden;
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ヘッダー */
header {
    position: center;
    top: 0;
    left: 0;
    width: 50%;
    min-width: 430px;
    margin-left: auto;
    margin-right: auto;
    background: #ffffff;
    padding: 20px 0;
    text-align: left;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: flex-start;
}

.header-image {
    max-width: 250px;
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
    margin-left: calc((100% - 800px) / 2 + 30px);
    margin-top: 0;
    margin-left: 32px;
    margin-right: auto;
}

@media (max-width: 860px) {
    .header-image {
        margin-left: 30px;
    }
}

/* メインコンテンツ */
.main-content {
    padding: 40px 30px;
    margin-top: 0;
    padding-top: 32px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.message-box {
    text-align: center;
}

.title {
    font-size: 28px;
    font-weight: 700;
    color: #d32f2f;
    margin-bottom: 30px;
    line-height: 1.4;
}

.content {
    text-align: left;
    margin-bottom: 30px;
}

.apology-text {
    font-size: 16px;
    color: #555;
    margin-bottom: 20px;
    line-height: 1.8;
}

.apology-text.highlight {
    font-size: 18px;
    font-weight: 700;
    color: #d32f2f;
    text-align: center;
}

/* フッター */
.footer {
    background: #f8f9fa;
    padding: 25px 30px;
    text-align: center;
    border-top: 2px solid #e9ecef;
}

.footer-text {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 12px;
    }
    
    header {
        padding: 15px 0;
    }
    
    .header-image {
        margin-left: calc((100% - 800px) / 2 + 20px);
    }
    
    @media (max-width: 860px) {
        .header-image {
            margin-left: 20px;
        }
    }
    
    .main-content {
        padding-top: 32px;
    }
    
    .header-image {
        max-width: 200px;
    }
    
    .main-content {
        padding: 30px 20px;
    }
    
    .title {
        font-size: 24px;
        margin-bottom: 25px;
    }
    
    .apology-text {
        font-size: 15px;
        margin-bottom: 18px;
    }
    
    .apology-text.highlight {
        font-size: 16px;
    }
    
    .footer {
        padding: 20px 15px;
    }
    
    .footer-text {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 10px 0;
    }
    
    .header-image {
        margin-left: calc((100% - 800px) / 2 + 15px);
    }
    
    @media (max-width: 860px) {
        .header-image {
            margin-left: 15px;
        }
    }
    
    .main-content {
        padding-top: 32px;
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .header-image {
        max-width: 180px;
    }
    
    .title {
        font-size: 20px;
    }
    
    .apology-text {
        font-size: 14px;
    }
    
    .apology-text.highlight {
        font-size: 15px;
    }
}

/* 画像が見つからない場合のスタイル */
.header-image[src="header-image.png"]:not([src*="data:"]) {
    background: #e9ecef;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-image[src="header-image.png"]:not([src*="data:"])::after {
    content: "ヘッダー画像を配置してください";
    color: #999;
    font-size: 14px;
}