:root {
    --ink: #26221e;
    --muted: #746b63;
    --paper: #f6f0e7;
    --card: #fffdf9;
    --line: #ded3c5;
    --blue: #245579;
    --blue-dark: #173c58;
    --rust: #a45536;
    --shadow: 0 14px 35px rgba(61, 46, 34, .12);
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 80% 0, #fff8ec 0, transparent 34rem), var(--paper); }
a { color: inherit; }
.site-header { background: rgba(255,253,249,.92); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px); }
.header-inner, .page-shell, .site-footer { width: min(1440px, calc(100% - 40px)); margin-inline: auto; }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 13px; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 44px; height: 50px; border-radius: 4px 10px 10px 4px; background: var(--blue); color: white; font: 700 25px Georgia, serif; box-shadow: inset 5px 0 rgba(255,255,255,.14); }
.brand strong { display: block; color: var(--blue-dark); font: 700 22px Georgia, serif; }
.brand small { display: block; color: var(--muted); margin-top: 2px; }
.collection-count { color: var(--muted); font-weight: 650; white-space: nowrap; }
.page-shell { padding: 52px 0 70px; }
.mode-tabs { display: inline-flex; gap: 5px; padding: 5px; margin-bottom: 32px; border: 1px solid var(--line); border-radius: 11px; background: rgba(255,253,249,.72); }
.mode-tabs a { min-width: 100px; padding: 9px 17px; border-radius: 7px; color: var(--muted); font-weight: 750; text-align: center; text-decoration: none; }
.mode-tabs a.active { background: var(--blue); color: white; box-shadow: 0 4px 10px rgba(36,85,121,.2); }
.intro { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 24px; }
.intro h1, .book-detail h1, .empty-state h1 { font: 700 clamp(34px, 5vw, 62px)/1.04 Georgia, serif; color: var(--blue-dark); margin: 5px 0 0; }
.intro > p { color: var(--muted); font-weight: 700; }
.eyebrow { color: var(--rust); font-size: 13px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; margin: 0; }
.filters { display: grid; grid-template-columns: minmax(260px, 2fr) repeat(5, minmax(135px, 1fr)); gap: 12px; align-items: end; padding: 19px; background: var(--card); border: 1px solid var(--line); border-radius: 15px; box-shadow: 0 7px 22px rgba(61,46,34,.07); margin-bottom: 34px; }
.filters label { display: grid; gap: 7px; }
.filters label span { color: var(--muted); font-size: 12px; font-weight: 750; }
input, select, button { font: inherit; }
input, select { width: 100%; height: 44px; border: 1px solid #cfc3b4; border-radius: 8px; background: white; color: var(--ink); padding: 0 11px; }
input:focus, select:focus { outline: 3px solid rgba(36,85,121,.18); border-color: var(--blue); }
.filter-actions { display: flex; grid-column: 1 / -1; gap: 10px; justify-content: flex-end; padding-top: 4px; }
.author-search { display: flex; align-items: end; gap: 10px; max-width: 700px; padding: 18px; margin-bottom: 34px; background: var(--card); border: 1px solid var(--line); border-radius: 15px; box-shadow: 0 7px 22px rgba(61,46,34,.07); }
.author-search label { display: grid; flex: 1; gap: 7px; }
.author-search label span { color: var(--muted); font-size: 12px; font-weight: 750; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 42px; padding: 0 18px; border: 1px solid var(--blue); border-radius: 8px; background: var(--blue); color: white; font-weight: 750; text-decoration: none; cursor: pointer; }
.button:hover { background: var(--blue-dark); }
.button-quiet { background: transparent; color: var(--blue); }
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 28px 22px; }
.book-card { min-width: 0; }
.author-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 28px 18px; }
.author-card { display: flex; flex-direction: column; align-items: center; min-width: 0; padding: 22px 12px 20px; border: 1px solid transparent; border-radius: 14px; text-align: center; text-decoration: none; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.author-card:hover { transform: translateY(-3px); background: rgba(255,253,249,.72); border-color: var(--line); }
.author-card img { width: 118px; height: 118px; display: block; border-radius: 50%; object-fit: cover; box-shadow: 0 10px 25px rgba(61,46,34,.16); }
.author-name { margin-top: 14px; color: var(--blue-dark); font: 700 18px/1.2 Georgia, serif; }
.author-count { margin-top: 5px; color: var(--muted); font-size: 12px; font-weight: 650; }
.cover-link { display: block; aspect-ratio: 2 / 3; border-radius: 8px; overflow: hidden; background: #d8cec1; box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .18s ease; }
.cover-link:hover { transform: translateY(-4px); box-shadow: 0 19px 40px rgba(61,46,34,.18); }
.book-cover { width: 100%; height: 100%; display: block; object-fit: cover; }
.book-card-body { padding: 14px 3px 0; }
.book-card h2 { margin: 3px 0 5px; font: 700 19px/1.18 Georgia, serif; color: var(--blue-dark); }
.book-card h2 a { text-decoration: none; }
.book-card h2 a:hover { color: var(--rust); }
.card-meta { color: var(--rust); font-size: 11px; font-weight: 800; letter-spacing: .055em; text-transform: uppercase; margin: 0; }
.card-author { font-weight: 650; margin: 0; }
.card-series { color: var(--muted); font-size: 13px; margin: 4px 0 0; }
.card-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 10px; }
.card-tags span { font-size: 11px; color: var(--blue); background: #e4edf3; border-radius: 999px; padding: 4px 7px; }
.pagination { display: flex; justify-content: center; align-items: center; gap: 20px; margin-top: 55px; color: var(--muted); }
.pagination a { color: var(--blue); font-weight: 750; text-decoration: none; }
.back-link { display: inline-block; color: var(--blue); font-weight: 750; margin-bottom: 25px; text-decoration: none; }
.book-detail { display: grid; grid-template-columns: minmax(260px, 370px) minmax(0, 760px); gap: clamp(34px, 6vw, 86px); align-items: start; }
.detail-cover { width: 100%; display: block; border-radius: 10px; box-shadow: var(--shadow); }
.detail-content { padding-top: 8px; }
.detail-content h1 { margin: 10px 0 8px; }
.detail-authors { font-size: 22px; font-weight: 700; margin: 0; }
.detail-authors a { color: inherit; text-decoration-color: rgba(36,85,121,.35); text-underline-offset: 3px; }
.detail-authors a:hover { color: var(--rust); }
.series-line { color: var(--rust); font-weight: 700; }
.metadata-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px 30px; border-block: 1px solid var(--line); padding: 22px 0; margin: 27px 0 20px; }
.metadata-grid div { display: grid; grid-template-columns: 130px 1fr; gap: 8px; }
.metadata-grid dt { color: var(--muted); }
.metadata-grid dd { margin: 0; font-weight: 650; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { background: #e3edf3; color: var(--blue-dark); border-radius: 999px; padding: 7px 11px; text-decoration: none; font-size: 13px; font-weight: 750; }
.description { margin-top: 35px; }
.description h2 { color: var(--blue-dark); font: 700 25px Georgia, serif; }
.description p { color: #49423c; line-height: 1.7; white-space: normal; }
.empty-state { text-align: center; padding: 70px 20px; background: rgba(255,255,255,.46); border: 1px dashed #cbbdab; border-radius: 14px; }
.empty-state p { color: var(--muted); }
.site-footer { color: var(--muted); border-top: 1px solid var(--line); padding: 24px 0 35px; }

@media (max-width: 1180px) {
    .filters { grid-template-columns: repeat(3, 1fr); }
    .search-field { grid-column: span 3; }
}
@media (max-width: 720px) {
    .header-inner, .page-shell, .site-footer { width: min(100% - 24px, 1440px); }
    .brand small, .collection-count { display: none; }
    .page-shell { padding-top: 32px; }
    .intro { align-items: start; flex-direction: column; gap: 8px; }
    .intro > p { margin: 0; }
    .filters { grid-template-columns: 1fr; }
    .search-field { grid-column: auto; }
    .author-search { align-items: stretch; flex-direction: column; }
    .author-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px 8px; }
    .author-card img { width: 98px; height: 98px; }
    .book-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px 14px; }
    .book-detail { grid-template-columns: 1fr; }
    .detail-cover-wrap { max-width: 330px; margin-inline: auto; }
    .metadata-grid { grid-template-columns: 1fr; }
    .metadata-grid div { grid-template-columns: 120px 1fr; }
}