/* kosatsu-fun.com 共通CSS(doujin-fun のヘッダー/サイドバー/レイアウトを移植) */

:root {
    --accent: #e3326d;
    --accent-strong: #ff4d87;
    --accent-soft: #3a1f2b;
    --bg: #16131a;
    --bg-primary: #1d1923;
    --bg-elevated: #2b2533;
    --panel: #211c29;
    --panel2: #2b2533;
    --text: #ece8f1;
    --text-primary: #ece8f1;
    --text-secondary: #c8c0d3;
    --text-muted: #9b91a8;
    --muted: #9b91a8;
    --border: #3a3340;
    --radius: 6px;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "M PLUS Rounded 1c", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
    line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ===== Header ===== */
.site-header {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--accent);
    padding: 0.9rem 1.25rem;
    position: sticky;
    top: 0;
    z-index: 50;
}
.site-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
}
.site-logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--accent);
    white-space: nowrap;
}
.site-logo:hover { text-decoration: none; opacity: 0.92; }

/* state を持つ visually-hidden checkbox */
.site-nav__toggle, .site-search__toggle {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
}

.site-nav { display: flex; align-items: center; font-size: 0.9rem; }
.site-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    transition: background-color 0.15s, color 0.15s;
    white-space: nowrap;
}
.site-nav__link:hover {
    color: var(--accent);
    background: var(--accent-soft);
    text-decoration: none;
}
.site-nav__icon { font-size: 1rem; line-height: 1; }
.site-nav--primary { gap: 0.15rem; margin-left: auto; }

/* ハンバーガーボタン */
.site-nav__hamburger {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    user-select: none;
    padding: 0.4rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: background-color 0.15s, color 0.15s;
}
.site-nav__hamburger:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
}
.site-nav__hamburger-bar {
    display: none;
    width: 18px;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}
.site-nav__hamburger-text { display: inline; }

/* drawer 本体 */
.site-nav--drawer { flex-direction: column; align-items: stretch; gap: 0.1rem; }
.site-nav__link--mobile-only { display: none; }
.site-nav__backdrop { display: none; }

/* スマホヘッダー検索 */
.site-search__icon, .site-header-search, .search-form--drawer { display: none; }

/* === PC (>= 768px): drawer はドロップダウン === */
@media (min-width: 768px) {
    .site-header__inner { position: relative; }
    .site-nav--drawer {
        display: none;
        position: absolute;
        top: calc(100% + 0.5rem);
        right: 0;
        min-width: 220px;
        background: var(--bg-primary);
        border: 1px solid var(--border);
        border-radius: 8px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.35);
        padding: 0.4rem;
        z-index: 60;
    }
    .site-nav__toggle:checked ~ .site-nav--drawer { display: flex; }
    .site-nav--drawer .site-nav__link { padding: 0.55rem 0.8rem; }
}

/* === スマホ (< 768px): drawer は右からスライドイン === */
@media (max-width: 767px) {
    .site-nav--primary { display: none; }
    .site-nav__hamburger {
        padding: 0.5rem;
        gap: 4px;
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        width: 36px;
        height: 36px;
        margin-left: 0.5rem;
    }
    .site-nav__hamburger-bar { display: block; }
    .site-nav__hamburger-text { display: none; }
    .site-nav__toggle:checked ~ .site-nav__hamburger .site-nav__hamburger-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
    .site-nav__toggle:checked ~ .site-nav__hamburger .site-nav__hamburger-bar:nth-child(2) { opacity: 0; }
    .site-nav__toggle:checked ~ .site-nav__hamburger .site-nav__hamburger-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

    .site-nav__link--mobile-only { display: inline-flex; }

    .site-nav--drawer {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 78vw;
        max-width: 320px;
        padding: 4.5rem 1.25rem 2rem;
        background: var(--bg-primary);
        box-shadow: -6px 0 18px rgba(0,0,0,0.45);
        transform: translateX(100%);
        transition: transform 0.25s ease-out;
        z-index: 90;
        gap: 0.4rem;
        overflow-y: auto;
    }
    .site-nav__toggle:checked ~ .site-nav--drawer { transform: translateX(0); }
    .site-nav--drawer .site-nav__link {
        min-height: 44px;
        padding: 0.85rem 0.6rem;
        font-size: 1rem;
        border-bottom: 1px solid var(--border);
        border-radius: 0;
    }
    .site-nav--drawer .site-nav__link:hover { background: var(--accent-soft); }

    .site-nav__backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s;
        z-index: 80;
    }
    .site-nav__toggle:checked ~ .site-nav__backdrop {
        opacity: 1;
        pointer-events: auto;
    }

    /* スマホヘッダー検索 */
    .site-search__icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        margin-left: auto;
        border: 1px solid var(--border);
        border-radius: 6px;
        background: var(--bg-primary);
        color: var(--text-secondary);
        font-size: 1.1rem;
        cursor: pointer;
        user-select: none;
        transition: background-color 0.15s, color 0.15s, border-color 0.15s;
    }
    .site-search__icon:hover {
        background: var(--accent-soft);
        color: var(--accent);
        border-color: var(--accent);
    }
    .site-search__toggle:checked ~ .site-header-search {
        display: block;
        flex-basis: 100%;
        width: 100%;
    }
    .search-form--drawer {
        display: flex;
        margin-bottom: 0.6rem;
    }
    .search-form--drawer input[type="search"] {
        min-height: 44px;
    }
}

/* ===== Search form (sidebar / drawer / header) ===== */
.search-form { display: flex; gap: 0; }
.search-form input[type="search"] {
    flex: 1;
    min-width: 0;
    border: 1px solid var(--border);
    border-right: none;
    border-radius: var(--radius) 0 0 var(--radius);
    padding: 0.55rem 0.75rem;
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
}
.search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--accent);
}
.search-form button {
    background: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 0 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: inherit;
}
.search-form button:hover { background: var(--accent-strong); }

/* ===== Layout (本文 + サイドバー) ===== */
.home-layout {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 3rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 1.75rem;
    align-items: start;
}
.home-layout__main { min-width: 0; }
.home-layout__sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}
@media (max-width: 960px) {
    .home-layout {
        grid-template-columns: 1fr;
        padding: 1.25rem 1rem 3rem;
    }
}

/* ===== Sidebar block ===== */
.sidebar-block {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.1rem 1.2rem;
}
.sidebar-block__title {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0 0 0.85rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-primary);
}
.sidebar-block__title::before {
    content: '';
    width: 4px;
    height: 1rem;
    background: var(--accent);
    border-radius: 2px;
}
.sidebar-block ul { list-style: none; margin: 0; padding: 0; }
.sidebar-block .category-list li { margin: 4px 0; }
.sidebar-block .category-list a {
    display: block;
    padding: 6px 4px;
    color: var(--text);
    font-size: 0.9rem;
    border-radius: 4px;
}
.sidebar-block .category-list a:hover {
    color: var(--accent);
    background: var(--accent-soft);
    text-decoration: none;
}
.sidebar-block .volume-list__item { margin: 8px 0; font-size: 0.85rem; }
.sidebar-block .volume-list__item a {
    display: flex; gap: 8px; justify-content: space-between;
    color: var(--text); padding: 4px 2px; border-radius: 4px;
}
.sidebar-block .volume-list__item a:hover { color: var(--accent); background: var(--accent-soft); text-decoration: none; }
.sidebar-block .volume-list__title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }
.sidebar-block .volume-list__meta { color: var(--muted); font-size: 0.78rem; white-space: nowrap; }
.sidebar-block .tag-mini {
    display: inline-block;
    background: var(--bg-elevated);
    color: var(--muted);
    font-size: 0.78rem;
    padding: 3px 10px;
    border-radius: 12px;
    margin: 3px 4px 3px 0;
}
.sidebar-block .tag-mini:hover { background: var(--accent); color: #fff; text-decoration: none; }

/* ===== Footer ===== */
.site-footer {
    margin-top: 40px;
    padding: 24px 1.25rem;
    background: var(--bg-primary);
    color: var(--muted);
    font-size: 12px;
    text-align: center;
    border-top: 1px solid var(--border);
}
.site-footer__inner { max-width: 1200px; margin: 0 auto; }
.site-footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    justify-content: center;
    margin: 12px 0;
}
.site-footer__nav a { color: var(--muted); font-size: 13px; }
.site-footer__nav a:hover { color: var(--accent); }
.adult-badge {
    display: inline-block;
    padding: 1px 6px;
    margin-right: 6px;
    background: var(--accent);
    color: #fff;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 700;
}

/* ===== 既存ページ共通(ホーム・一覧・詳細などで使う) ===== */
.breadcrumb {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 4px 0 14px;
    line-height: 1.7;
}
.breadcrumb a {
    color: var(--text-secondary);
}
.breadcrumb a:hover {
    color: var(--accent);
    text-decoration: underline;
}
.breadcrumb__sep {
    margin: 0 0.4rem;
    color: var(--text-muted);
}
h1.page { font-size: 20px; margin: 18px 0 10px; }
h2.sec { font-size: 20px; font-weight: 700; margin: 32px 0 14px; padding-left: 10px; border-left: 4px solid var(--accent); }
h2.sec:first-of-type { margin-top: 20px; }
.sec-body { padding: 0 10px; }

.grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 960px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 600px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.card { background: var(--panel); border-radius: 8px; overflow: hidden; transition: transform 0.1s; }
.card:hover { transform: translateY(-2px); text-decoration: none; }
.card .thumb { aspect-ratio: 4/3; background: #000; overflow: hidden; }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.card .body { padding: 8px 10px; }
.card .ttl { font-size: 13px; max-height: 3.2em; overflow: hidden; }
.card .meta { display: flex; justify-content: space-between; margin-top: 6px; font-size: 12px; color: var(--muted); }
.price { color: var(--accent); font-weight: 700; }
.star { color: #f3c623; }
.btn-buy { display: inline-block; background: var(--accent); color: #fff; padding: 12px 22px; border-radius: 8px; font-weight: 700; }
.btn-buy:hover { background: var(--accent-strong); text-decoration: none; }

.pager { display: flex; gap: 6px; flex-wrap: wrap; margin: 20px 0; justify-content: center; }
.pager a, .pager span { padding: 6px 11px; background: var(--panel); border-radius: 6px; font-size: 13px; }
.pager .active { background: var(--accent); color: #fff; }

/* 年齢確認 */
#agegate { position: fixed; inset: 0; background: rgba(10,8,12,.97); z-index: 100; display: flex; align-items: center; justify-content: center; }
#agegate[hidden] { display: none; }
#agegate .box { background: var(--panel); padding: 30px 24px; border-radius: 12px; max-width: 380px; text-align: center; border-top: 4px solid var(--accent); }
#agegate h2 { color: var(--accent); margin: 0 0 10px; }
#agegate .row { display: flex; gap: 10px; margin-top: 18px; }
#agegate button { flex: 1; padding: 12px; border: none; border-radius: 8px; font-weight: 700; cursor: pointer; }
#agegate .yes { background: var(--accent); color: #fff; }
#agegate .no { background: var(--panel2); color: var(--muted); }