/* ============================================================
   layout.css - Container, header nav, footer, grids, sidebar, mobile nav
   ============================================================ */
.container { max-width: 1200px; margin: 0 auto; padding: 20px 16px; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 1000;
  height: var(--header-h);
}

.header-inner {
  max-width: 1200px; margin: 0 auto; height: 100%;
  display: flex; align-items: center; gap: 24px; padding: 0 16px;
}

.header-logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 700; color: var(--primary); flex-shrink: 0; }

.header-logo .logo-mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center; color: #fff;
}

.header-nav { display: flex; align-items: center; gap: 4px; flex: 1; }

.header-nav > a {
  padding: 8px 14px; font-size: 15px; color: var(--text-2); border-radius: 6px;
  display: flex; align-items: center; gap: 5px; position: relative;
}

.header-nav > a:hover, .header-nav > a.active { color: var(--primary); background: var(--primary-light); }

/* dropdown */
.nav-item { position: relative; }

.nav-dropdown {
  position: absolute; top: 100%; left: 0; margin-top: 6px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); min-width: 420px; padding: 16px;
  opacity: 0; visibility: hidden; transform: translateY(6px); transition: all .2s;
}

.nav-item:hover .nav-dropdown, .nav-item.open .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }

.dropdown-col { margin-bottom: 12px; }

.dropdown-col:last-child { margin-bottom: 0; }

.dropdown-col h5 { font-size: 12px; color: var(--text-4); margin-bottom: 8px; font-weight: 600; }

.dropdown-links { display: flex; flex-wrap: wrap; gap: 6px; }

.dropdown-links a {
  font-size: 13px; padding: 4px 10px; border-radius: 4px;
  background: var(--bg); color: var(--text-2);
}

.dropdown-links a:hover { background: var(--primary); color: #fff; }

.header-search { flex-shrink: 0; }

.header-search form { display: flex; align-items: center; }

.header-search input {
  width: 220px; padding: 8px 14px; border: 1px solid var(--border);
  border-right: none; border-radius: 6px 0 0 6px; font-size: 13px;
  background: var(--bg); color: var(--text); height: 36px;
}

.header-search input:focus { border-color: var(--primary); }

.header-search .search-btn {
  width: 40px; height: 36px; background: var(--primary); color: #fff;
  border-radius: 0 6px 6px 0; display: flex; align-items: center; justify-content: center;
}

.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.mobile-menu-btn { display: none; }

/* ============================================================
   LAYOUT: main + sidebar
   ============================================================ */
.layout { display: grid; grid-template-columns: 1fr 300px; gap: 20px; margin-top: 20px; }

.main-col { min-width: 0; }

.side-col { display: flex; flex-direction: column; gap: 20px; }

/* ============================================================
   BOOK GRID / CARDS
   ============================================================ */
.book-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.side-card { background: var(--card); border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; }

.side-card-head { padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 15px; font-weight: 700; display: flex; align-items: center; gap: 6px; }

.side-card-body { padding: 12px 16px; }

.cat-group { margin-bottom: 14px; }

.cat-group:last-child { margin-bottom: 0; }

.cat-group-title { font-size: 13px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }

.cat-group-title.female { color: #ff4d8d; }

.cat-links { display: flex; flex-wrap: wrap; gap: 6px; }

.cat-links a { font-size: 12px; color: var(--text-2); padding: 3px 9px; background: var(--bg); border-radius: 4px; }

.cat-links a:hover { background: var(--primary); color: #fff; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--card); border-top: 1px solid var(--border); margin-top: 40px; }

.footer-main { max-width: 1200px; margin: 0 auto; padding: 32px 16px; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }

.footer-logo { display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }

.footer-brand p { font-size: 13px; color: var(--text-3); line-height: 1.7; }

.footer-col h4 { font-size: 14px; margin-bottom: 12px; color: var(--text); }

.footer-col ul li { margin-bottom: 8px; }

.footer-col ul a { font-size: 13px; color: var(--text-3); }

.footer-col ul a:hover { color: var(--primary); }

.footer-bottom { border-top: 1px solid var(--border); padding: 16px; text-align: center; font-size: 12px; color: var(--text-4); }

/* ============================================================
   MOBILE NAV
   ============================================================ */
.mobile-nav { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 1100; opacity: 0; visibility: hidden; transition: all .25s; }

.mobile-nav.open { opacity: 1; visibility: visible; }

.mobile-nav-panel { position: absolute; left: 0; top: 0; bottom: 0; width: 280px; background: var(--card); padding: 20px; transform: translateX(-100%); transition: transform .25s; overflow-y: auto; }

.mobile-nav.open .mobile-nav-panel { transform: translateX(0); }

.mobile-nav-close { position: absolute; top: 16px; right: 16px; color: var(--text-2); }

.mobile-nav-search { margin-bottom: 20px; margin-top: 20px; }

.mobile-nav-search input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--text); }

.mobile-nav-links a { display: flex; align-items: center; gap: 10px; padding: 11px 8px; font-size: 15px; color: var(--text-2); border-radius: 6px; }

.mobile-nav-links a.active, .mobile-nav-links a:hover { background: var(--primary-light); color: var(--primary); }

.mobile-cat-block { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; }

.mobile-cat-block h5 { font-size: 12px; color: var(--text-4); margin-bottom: 8px; }

.mobile-cat-block .chips { margin-bottom: 8px; }