/* --- Tensho Serene Gallery: Season Management --- */

:root {
    /* 季節や気分に合わせて、ここを書き換えてください */
    --accent-color: #98d98e; /* 春（若草色） */
    --text-main: #333;
    --text-sub: #666;
    --bg-color: #fdfdfd;
    --card-bg: #fff;
    --border-color: #eee;
}

/* --- Base Style --- */
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.8;
    color: var(--text-main);
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: var(--bg-color);
}

a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.3s, background-color 0.3s;
}

a:hover {
    color: var(--accent-color);
}

/* --- Gallery Grid (一覧用) --- */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
    padding: 0;
    list-style: none;
    margin-top: 40px;
}

.gallery-item a {
    display: block;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--card-bg);
    transition: transform 0.3s, box-shadow 0.3s;
}

.gallery-item a:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.thumbnail-wrapper {
    height: 180px;
    overflow: hidden;
}

.thumbnail-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.item-info {
    padding: 15px;
}

.item-id {
    font-size: 0.8em;
    color: var(--text-sub);
    display: block;
}

.item-info h3 {
    margin: 5px 0 0;
    font-size: 1.1em;
}

/* --- Slider (個別記事用) --- */
.slider-container {
    position: relative;
    max-width: 100%;
    margin: 30px auto;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.slides {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    min-width: 100%;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
}

.prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.4);
    color: var(--text-main);
    border: none;
    padding: 15px 10px;
    cursor: pointer;
    font-size: 1.2em;
    transition: 0.3s;
    z-index: 10;
}

.prev:hover, .next:hover { background: rgba(255,255,255,0.8); }
.prev { left: 0; border-radius: 0 5px 5px 0; }
.next { right: 0; border-radius: 5px 0 0 5px; }

.dots {
    text-align: center;
    position: absolute;
    bottom: 15px;
    width: 100%;
}

.dot {
    height: 10px;
    width: 10px;
    margin: 0 5px;
    background-color: rgba(255,255,255,0.5);
    border-radius: 50%;
    display: inline-block;
    cursor: pointer;
    transition: 0.3s;
}

.dot.active {
    background-color: #fff;
    transform: scale(1.2);
}

/* --- Navigation & Footer --- */
.post-navigation {
    display: flex;
    justify-content: center; /* 中央寄せに変更 */
    align-items: center;
    gap: 20px; /* 要素同士の間隔 */
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.nav-home {
    padding: 8px 24px;
    border: 1px solid var(--accent-color);
    border-radius: 20px;
    font-size: 0.9em;
}

.nav-home:hover {
    background-color: var(--accent-color);
    color: #fff;
}

footer {
    text-align: center;
    padding: 60px 0;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    color: var(--text-sub);
    font-size: 0.85rem;
}

footer address {
    font-style: normal;
}