body {
    background-color: #ffffff;
    color: #000000;
    font-family: 'ＭＳ Ｐゴシック', 'MS PGothic', 'IPAMonaPGothic', 'Mona', 'Helvetica', sans-serif;
    margin: 0;
    padding: 20px 10px;
    line-height: 1.5;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 10px;
}



/* 共通設定 */
.post-meta {
    font-size: 0.95rem;
    color: #333333;
    margin-bottom: 12px;
}

.post-meta .number {
    color: #666666;
}

.post-meta .name {
    font-weight: bold;
    color: #228822;
}

.prompt {
    margin-bottom: 15px;
    color: #000000;
}

/* 一番上の大きな画像 (Hero) */
.hero-post {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px dashed #cccccc;
}

.hero-post .post-title {
    font-size: 1.8rem;
    font-weight: bold;
    color: #0000cc;
    margin-top: 0;
    margin-bottom: 15px;
    text-align: center;
}

.hero-post .post-content {
    font-size: 1.1rem;
    padding-left: 20px;
    text-align: center;
}

.hero-image {
    width: 100%;
    text-align: center;
}

.hero-image img {
    max-height: 75vh;
    max-width: 100%;
    width: auto;
    border: 1px solid #999999;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
    margin: 0 auto;
}

/* 過去の画像 (Grid) */
.history-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #cc0000;
    border-left: 5px solid #cc0000;
    padding-left: 10px;
    margin-bottom: 20px;
}

.older-posts {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.small-post {
    border: 1px solid #dddddd;
    padding: 15px;
    background-color: #f9f9f9;
}

.small-post .post-title {
    font-size: 1.1rem;
    font-weight: bold;
    color: #0000cc;
    margin-top: 0;
    margin-bottom: 8px;
}

.small-post .post-content {
    font-size: 0.95rem;
}

.small-image img {
    width: 100%;
    height: auto;
    border: 1px solid #cccccc;
}

.empty-state {
    padding: 40px;
    text-align: center;
    color: #555555;
    border: 1px solid #dddddd;
    background-color: #f9f9f9;
}

footer {
    text-align: right;
    font-size: 0.85rem;
    color: #777777;
    margin-top: 40px;
    border-top: 1px solid #dddddd;
    padding-top: 15px;
}