:root { --border:#e5e7eb; --muted:#6b7280; --bg:#ffffff; --card:#f9fafb; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; background: var(--bg); color:#111827; }
.container { max-width: 1100px; margin: 0 auto; padding: 1rem; }

.nav { display:flex; justify-content:space-between; align-items:center; gap:1rem; padding: .75rem 1rem; border-bottom:1px solid var(--border); position: sticky; top:0; background: #fff; }
.brand { font-weight: 700; text-decoration:none; color:#111827; margin-right: 1rem; }
.nav-left { display:flex; align-items:center; gap:1rem; flex-wrap:wrap; }
.nav-right { display:flex; align-items:center; }

.books-nav { display:flex; align-items:center; gap:.5rem; flex-wrap:wrap; }
.books-nav .label { color: var(--muted); font-size: .9rem; }
.books-list { display:flex; gap:.5rem; flex-wrap:wrap; }
.book-link { text-decoration:none; padding: .35rem .55rem; border:1px solid var(--border); border-radius: 999px; background: #fff; color:#111827; font-size: .9rem; }
.book-link:hover { background: var(--card); }

.search { display:flex; gap:.5rem; align-items:center; }
.search input[type="text"] { padding:.45rem .6rem; border:1px solid var(--border); border-radius: .5rem; min-width: 220px; }
.search select { padding:.45rem .6rem; border:1px solid var(--border); border-radius: .5rem; }
.search button { padding:.45rem .7rem; border:1px solid var(--border); border-radius:.5rem; background:#111827; color:#fff; cursor:pointer; }
.search button:hover { opacity:.9; }

.footer { border-top:1px solid var(--border); margin-top: 2rem; padding: 1rem 0; color: var(--muted); }

h1 { margin: .25rem 0 1rem; }
h2 { margin: 1.25rem 0 .75rem; }

.book-grid { display:grid; grid-template-columns: repeat(auto-fill,minmax(240px,1fr)); gap: 1rem; }
.book-card { display:block; border:1px solid var(--border); border-radius: 1rem; padding: 1rem; text-decoration:none; color:#111827; background: #fff; }
.book-card:hover { background: var(--card); }
.book-title { font-weight: 700; }
.book-meta { color: var(--muted); margin-top: .25rem; font-size: .9rem; }

.chapters { display:grid; grid-template-columns: 280px 1fr; gap: 1.25rem; }
@media (max-width: 900px) { .chapters { grid-template-columns: 1fr; } .toc { position: static !important; } }
.toc { border:1px solid var(--border); border-radius: 1rem; padding: 1rem; background: #fff; position: sticky; top: 4.25rem; height: fit-content; }
.toc-title { font-weight: 700; margin-bottom: .5rem; }
.toc ol { margin: .5rem 0 0 1.2rem; padding:0; }
.toc a { color:#111827; text-decoration:none; }
.toc a:hover { text-decoration: underline; }

.rt-block[dir="rtl"] { text-align: right; }
.rt-block[dir="ltr"] { text-align: left; }
.rt-block p { line-height: 1.6; margin: .6rem 0; }

.tbl-wrap { overflow-x: auto; margin: .75rem 0; }
.tbl { border-collapse: collapse; width: 100%; }
.tbl td { border: 1px solid var(--border); padding: .5rem; vertical-align: top; }
.tbl-caption { color: var(--muted); margin-top: .25rem; font-size: .9rem; }

.img-block { margin: 1rem 0; }
.img-block img { max-width: 100%; height: auto; display: block; border-radius: .75rem; border: 1px solid var(--border); }
.img-block figcaption { color: var(--muted); margin-top: .35rem; font-size: .9rem; }

.search-page { display:flex; gap:.5rem; flex-wrap:wrap; margin-bottom: 1rem; }
.search-page input, .search-page select { padding:.45rem .6rem; border:1px solid var(--border); border-radius:.5rem; }
.search-page button { padding:.45rem .7rem; border:1px solid var(--border); border-radius:.5rem; background:#111827; color:#fff; cursor:pointer; }
.muted { color: var(--muted); }

.hits { padding-left: 1.2rem; }
.hit { margin: .75rem 0; }
.hit-title { font-weight: 600; }
.hit-title .sep { color: var(--muted); padding: 0 .25rem; }
.hit-snippet { color: #111827; margin-top: .25rem; }
.hblock { margin: 1.1rem 0 .5rem; }

.book-cover {
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    display: block;
    border-radius: 10px;
    margin-bottom: 12px;
}

.book-cover.placeholder {
    width: 100%;
    aspect-ratio: 2 / 3;
    display: grid;
    place-items: center;
    background: #f2f2f2;
    color: #666;
    border-radius: 10px;
    margin-bottom: 12px;
}