body {
    font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
    background: #2b2b2b; /* 夜・重さ */
    margin: 0;
    padding: 40px;
    color: #e0e0e0;
}

.container {
    max-width: 820px;
    margin: auto;
    background: #f1f1ee; /* 古い記録紙のような色 */
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.6);
    color: #2a2a2a;
}

h1 {
    text-align: center;
    margin-bottom: 10px;
    font-size: 2rem;
    color: #7b1e1e; /* 暗い血色 */
    letter-spacing: 0.05em;
}

h2 {
    margin-top: 30px;
    font-size: 1.4rem;
    color: #4d1a1a;
    border-bottom: 2px solid #7b1e1e;
    padding-bottom: 6px;
}

.notice {
    background: #2b2b2b;
    color: #ff4d4d;
    text-align: center;
    padding: 10px;
    margin: 20px 0 30px;
    font-weight: bold;
    border-left: 6px solid #7b1e1e;
}

p {
    line-height: 1.9;
    margin-bottom: 20px;
}

a {
    color: #7b1e1e;
    text-decoration: none;
}

a:hover {
    color: #b03030;
    text-decoration: underline;
}

.photo-gallery img {
    filter: grayscale(30%);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

footer {
    text-align: center;
    color: #666;
    font-size: 0.9rem;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #aaa;
}

/* ページ前後ナビ */
.page-nav {
    display: flex;
    justify-content: space-between;
    margin: 10px 0 30px;
    font-size: 0.95rem;
}

.page-nav a {
    color: #7b1e1e;
    text-decoration: none;
    padding: 6px 10px;
    background: #e8e8e3;
    border-radius: 4px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.page-nav a:hover {
    background: #d8d8d2;
    color: #b03030;
}

.link {
    color: blue;
    text-decoration-line: underline;
}

/* =========================
   スマホ・タブレット対応
   ========================= */

/* タブレット以下 */
@media screen and (max-width: 1024px) {
    body {
        padding: 20px;
    }

    .container {
        padding: 30px;
    }
}

/* スマホ */
@media screen and (max-width: 768px) {

    body {
        padding: 10px;
        font-size: 16px;
    }

    .container {
        max-width: 100%;
        padding: 20px 16px;
        border-radius: 0;
    }

    h1 {
        font-size: 1.6rem;
        margin-bottom: 15px;
        letter-spacing: 0.03em;
    }

    h2 {
        font-size: 1.25rem;
        margin-top: 25px;
    }

    .notice {
        font-size: 0.95rem;
        padding: 10px 12px;
        margin: 20px 0 25px;
    }

    p {
        line-height: 1.8;
        margin-bottom: 18px;
    }

    /* 写真は縦積み */
    .photo-gallery {
        display: block;
    }

    .photo-gallery img {
        width: 100%;
        margin-bottom: 15px;
        filter: grayscale(40%);
    }

    /* 前後ナビを縦並びに */
    .page-nav {
        flex-direction: column;
        gap: 10px;
        font-size: 0.95rem;
    }

    .page-nav a {
        text-align: center;
        padding: 10px;
    }

    footer {
        font-size: 0.85rem;
        margin-top: 30px;
    }
}

/* 小型スマホ */
@media screen and (max-width: 480px) {

    h1 {
        font-size: 1.4rem;
    }

    h2 {
        font-size: 1.15rem;
    }

    .notice {
        font-size: 0.9rem;
    }

    .page-nav a {
        padding: 12px;
    }
}