/* ============================================================
   PAIRAVI BOOK HOUSE — Components
   ============================================================ */

/* ---------------- Buttons ---------------- */
.btn {
  --_pad-y: 0.75rem; --_pad-x: 1.4rem;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: var(--font-ui); font-weight: 600; font-size: var(--fs-ui);
  line-height: 1; padding: var(--_pad-y) var(--_pad-x); border-radius: var(--radius-md);
  border: 1.5px solid transparent; cursor: pointer; white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
  min-height: 44px; /* a11y touch target */
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn--secondary { background: transparent; color: var(--color-text); border-color: var(--color-border-strong); }
.btn--secondary:hover { background: var(--color-surface-alt); border-color: var(--color-text-soft); }
.btn--ghost { background: transparent; color: var(--color-primary); padding-inline: 0.5rem; }
.btn--ghost:hover { color: var(--color-primary-hover); }
.btn--accent { background: var(--color-accent); color: var(--ink-900); }
.btn--accent:hover { background: var(--color-accent-strong); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn--block { width: 100%; }
.btn--lg { --_pad-y: 1rem; --_pad-x: 2rem; font-size: 1rem; }
.btn--sm { --_pad-y: 0.5rem; --_pad-x: 0.9rem; min-height: 38px; font-size: var(--fs-caption); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn svg { width: 18px; height: 18px; flex: none; }

.link-underline { position: relative; color: var(--color-link); font-weight: 600; }
.link-underline::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 100%; height: 1.5px; background: var(--color-accent); transform: scaleX(0); transform-origin: left; transition: transform var(--dur-base) var(--ease-out); }
.link-underline:hover::after { transform: scaleX(1); }

/* ---------------- Icon button ---------------- */
.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px;
  border-radius: var(--radius-md); color: var(--color-text-soft);
  position: relative; transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--color-surface-alt); color: var(--color-text); }
.icon-btn svg { width: 21px; height: 21px; }
.icon-btn .count-badge {
  position: absolute; top: 4px; right: 4px; min-width: 18px; height: 18px; padding: 0 5px;
  background: var(--color-primary); color: var(--color-on-primary); border-radius: var(--radius-pill);
  font-family: var(--font-ui); font-size: 11px; font-weight: 700; line-height: 18px; text-align: center;
  transform: scale(0); transition: transform var(--dur-base) var(--ease-spring);
}
.icon-btn .count-badge.is-active { transform: scale(1); }
.count-badge.pop { animation: badge-pop 420ms var(--ease-spring); }
@keyframes badge-pop { 0%{transform:scale(1);} 40%{transform:scale(1.5);} 100%{transform:scale(1);} }

/* ---------------- Badges ---------------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--font-ui); font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 4px 9px; border-radius: var(--radius-pill); line-height: 1;
}
.badge--bestseller { background: var(--color-accent-tint); color: var(--color-accent-strong); }
.badge--new { background: var(--color-secondary-tint); color: var(--color-secondary); }
.badge--sale { background: var(--color-primary-tint); color: var(--color-primary); }
.badge--limited { background: #fff0e6; color: #b15a1c; }
:root[data-theme="dark"] .badge--limited { background: #2a1f15; color: #e0a35e; }
.badge--press { background: transparent; color: var(--color-primary); border: 1px solid var(--color-primary); }

/* ---------------- Forms ---------------- */
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label { font-family: var(--font-ui); font-weight: 600; font-size: var(--fs-ui); color: var(--color-text-soft); }
.input, .select, .textarea {
  width: 100%; background: var(--color-surface); border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-sm); padding: 0.7rem 0.9rem; font-size: var(--fs-body-sm); color: var(--color-text);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
  min-height: 44px;
}
.input::placeholder { color: var(--color-text-muted); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-tint); }
.field .hint { font-size: var(--fs-caption); color: var(--color-text-muted); }
.field .error-msg { font-size: var(--fs-caption); color: var(--color-error); font-family: var(--font-ui); }
.input[aria-invalid="true"] { border-color: var(--color-error); }

/* ---------------- Utility bar ---------------- */
.utility-bar { background: var(--ink-900); color: var(--paper-200); font-family: var(--font-ui); font-size: var(--fs-caption); }
:root[data-theme="dark"] .utility-bar { background: #0E0C0A; }
.utility-bar .container { display: flex; align-items: center; justify-content: space-between; height: 40px; gap: var(--space-4); }
.utility-bar a { color: var(--paper-200); display: inline-flex; align-items: center; gap: 6px; padding: 4px 2px; transition: color var(--dur-fast); }
.utility-bar a:hover { color: var(--color-accent); }
.utility-bar nav { display: flex; gap: var(--space-5); }
.utility-bar .util-note { display: inline-flex; align-items: center; gap: 8px; color: var(--brass-200); }
.utility-bar .util-note svg { width: 15px; height: 15px; }

/* ---------------- Header ---------------- */
.site-header { position: sticky; top: 0; z-index: var(--z-header); background: var(--color-bg); border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out); }
.site-header.is-stuck { box-shadow: var(--shadow-md); }
.header-main .container { display: flex; align-items: center; gap: var(--space-5); height: 76px; }

.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.brand .brand-mark { width: 42px; height: 42px; }
.brand .brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand .brand-name { font-family: var(--font-display); font-weight: 600; font-size: 1.35rem; color: var(--color-text); letter-spacing: -0.01em; }
.brand .brand-sub { font-family: var(--font-ui); font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--color-accent-strong); margin-top: 3px; }

.header-tools { display: flex; align-items: center; gap: 2px; margin-left: auto; flex: none; }

/* ---------------- Search ---------------- */
.search { position: relative; flex: 1 1 auto; max-width: 560px; }
.search-form { display: flex; align-items: center; background: var(--color-surface-alt); border: 1.5px solid var(--color-border); border-radius: var(--radius-pill); padding: 4px 4px 4px 16px; transition: border-color var(--dur-fast), box-shadow var(--dur-fast); }
.search-form:focus-within { border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-tint); background: var(--color-surface); }
.search-form .search-ico { width: 19px; height: 19px; color: var(--color-text-muted); flex: none; }
.search-input { flex: 1; border: none; background: none; padding: 0.55rem 0.7rem; font-family: var(--font-ui); font-size: var(--fs-ui); min-height: auto; }
.search-input:focus { outline: none; box-shadow: none; }
.search-ai-tag { font-family: var(--font-ui); font-size: 10px; font-weight: 700; letter-spacing: 0.08em; color: var(--color-accent-strong); background: var(--color-accent-tint); padding: 3px 8px; border-radius: var(--radius-pill); margin-right: 4px; display: inline-flex; gap: 4px; align-items: center; }
.search-ai-tag svg { width: 12px; height: 12px; }
.search-go { width: 38px; height: 38px; border-radius: var(--radius-pill); background: var(--color-primary); color: var(--color-on-primary); display: grid; place-items: center; flex: none; }
.search-go:hover { background: var(--color-primary-hover); }
.search-go svg { width: 18px; height: 18px; }

.search-panel { position: absolute; top: calc(100% + 10px); left: 0; right: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: var(--space-3); z-index: var(--z-dropdown); display: none; max-height: 70vh; overflow-y: auto; }
.search-panel.is-open { display: block; }
.search-panel .sp-group + .sp-group { margin-top: var(--space-3); border-top: 1px solid var(--color-border); padding-top: var(--space-3); }
.search-panel .sp-label { font-family: var(--font-ui); font-size: var(--fs-caption); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); padding: 4px 10px; }
.sp-item { display: flex; align-items: center; gap: var(--space-3); padding: 8px 10px; border-radius: var(--radius-md); cursor: pointer; }
.sp-item:hover, .sp-item.is-active { background: var(--color-surface-alt); }
.sp-item .sp-cover { width: 34px; height: 48px; border-radius: var(--radius-book); object-fit: cover; background: var(--color-surface-alt); flex: none; box-shadow: var(--shadow-xs); }
.sp-item .sp-meta { min-width: 0; }
.sp-item .sp-title { font-family: var(--font-ui); font-weight: 600; font-size: var(--fs-body-sm); color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sp-item .sp-sub { font-size: var(--fs-caption); color: var(--color-text-muted); }
.sp-item mark { background: var(--color-accent-tint); color: inherit; border-radius: 2px; }
.sp-correction { font-family: var(--font-ui); font-size: var(--fs-body-sm); padding: 6px 10px; color: var(--color-text-soft); }
.sp-correction b { color: var(--color-primary); }
.sp-chip { display: inline-flex; padding: 6px 12px; border-radius: var(--radius-pill); background: var(--color-surface-alt); font-family: var(--font-ui); font-size: var(--fs-caption); font-weight: 600; margin: 3px; }
.sp-empty { padding: var(--space-5); text-align: center; color: var(--color-text-muted); }

/* ---------------- Account dropdown ---------------- */
.account-wrap { position: relative; }
.account-menu {
  position: absolute; top: calc(100% + 10px); right: 0; width: 300px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-xl); padding: var(--space-4);
  z-index: var(--z-dropdown); opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility var(--dur-fast);
}
.account-menu::before { content: ""; position: absolute; top: -10px; right: 0; width: 60px; height: 10px; }
.account-wrap:hover .account-menu, .account-wrap.is-open .account-menu, .account-wrap:focus-within .account-menu { opacity: 1; visibility: visible; transform: none; }
.am-promo { background: var(--color-primary); color: var(--color-on-primary); border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-3); display: flex; flex-direction: column; gap: 3px; }
.am-promo-k { font-family: var(--font-ui); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--brass-200); font-weight: 700; }
.am-promo-t { font-family: var(--font-display); font-size: 1.05rem; line-height: 1.2; }
.am-promo-c { font-family: var(--font-ui); font-size: var(--fs-caption); color: color-mix(in srgb, var(--color-on-primary) 85%, transparent); margin-top: 2px; }
.am-sub { font-family: var(--font-ui); font-size: var(--fs-caption); color: var(--color-text-muted); text-align: center; margin: var(--space-3) 0; }
.am-sub a { color: var(--color-primary); font-weight: 600; }
.am-head { display: flex; align-items: center; gap: var(--space-3); padding-bottom: var(--space-3); margin-bottom: var(--space-2); border-bottom: 1px solid var(--color-border); }
.am-avatar { width: 44px; height: 44px; }
/* reusable avatar (initials or uploaded photo) */
.avatar { display: grid; place-items: center; width: 100%; height: 100%; min-width: 36px; min-height: 36px; border-radius: 50%; background: var(--color-primary); color: var(--color-on-primary); font-family: var(--font-ui); font-weight: 700; font-size: .95rem; background-size: cover; background-position: center; overflow: hidden; }
.avatar--sm { width: 30px; height: 30px; font-size: .8rem; }
.icon-btn.has-avatar { padding: 0; overflow: hidden; }
.icon-btn.has-avatar .avatar { box-shadow: 0 0 0 2px var(--color-accent); }
/* notification bell + panel */
.notif-wrap { position: relative; }
.notif-panel { position: absolute; right: 0; top: calc(100% + 10px); width: 340px; max-width: 90vw; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); z-index: var(--z-dropdown, 60); overflow: hidden; }
.np-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--color-border); }
.np-readall { background: none; border: none; color: var(--color-primary); font-family: var(--font-ui); font-size: var(--fs-caption); font-weight: 600; cursor: pointer; }
.np-list { max-height: 380px; overflow-y: auto; }
.np-empty { padding: 24px 14px; text-align: center; color: var(--color-text-muted); font-family: var(--font-ui); font-size: var(--fs-body-sm); }
.np-item { display: flex; gap: 10px; padding: 11px 14px; border-bottom: 1px solid var(--color-border); cursor: pointer; align-items: flex-start; }
.np-item:hover { background: var(--color-surface-alt); }
.np-item.unread { background: color-mix(in srgb, var(--color-primary) 6%, var(--color-surface)); }
.np-ico { flex: none; font-size: 1.1rem; line-height: 1.3; }
.np-body { flex: 1; min-width: 0; }
.np-title { font-family: var(--font-ui); font-weight: 600; font-size: var(--fs-body-sm); }
.np-text { font-family: var(--font-body); font-size: var(--fs-caption); color: var(--color-text-soft); }
.np-time { font-family: var(--font-ui); font-size: 11px; color: var(--color-text-muted); margin-top: 2px; }
.np-del { background: none; border: none; color: var(--color-text-muted); cursor: pointer; font-size: 16px; line-height: 1; flex: none; }
.np-foot { padding: 10px 14px; border-top: 1px solid var(--color-border); text-align: center; }
.np-foot a { font-family: var(--font-ui); font-size: var(--fs-caption); font-weight: 600; color: var(--color-primary); }
.util-request { font-weight: 600; }
.am-name { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.am-status { font-family: var(--font-ui); font-size: var(--fs-caption); color: var(--color-accent-strong); font-weight: 600; }
.am-links { display: flex; flex-direction: column; margin-bottom: var(--space-3); }
.am-links a { display: flex; align-items: center; gap: var(--space-3); padding: 10px 8px; border-radius: var(--radius-sm); font-family: var(--font-ui); font-size: var(--fs-body-sm); font-weight: 500; color: var(--color-text-soft); }
.am-links a:hover { background: var(--color-surface-alt); color: var(--color-primary); }
.am-links svg { width: 18px; height: 18px; color: var(--color-text-muted); }

/* ---------------- Language & Theme toggles ---------------- */
.lang-toggle { display: inline-flex; border: 1.5px solid var(--color-border-strong); border-radius: var(--radius-pill); overflow: hidden; font-family: var(--font-ui); font-size: var(--fs-caption); font-weight: 700; }
.lang-toggle button { padding: 7px 11px; color: var(--color-text-muted); transition: background-color var(--dur-fast), color var(--dur-fast); }
.lang-toggle button[aria-pressed="true"] { background: var(--color-primary); color: var(--color-on-primary); }

.theme-toggle svg { transition: transform var(--dur-base) var(--ease-spring); }
.theme-toggle .ico-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .ico-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .ico-moon { display: none; }

/* ---------------- Primary nav ---------------- */
.primary-nav { border-top: 1px solid var(--color-border); background: var(--color-bg); }
.primary-nav .container { display: flex; align-items: center; gap: var(--space-2); height: 52px; }
.primary-nav ul { display: flex; align-items: center; gap: 2px; list-style: none; padding: 0; margin: 0; flex-wrap: nowrap; white-space: nowrap; }
@media (max-width: 1180px) { .nav-link { padding: 9px 10px; } .primary-nav ul { gap: 0; } }
.nav-link { display: inline-flex; align-items: center; gap: 6px; padding: 9px 14px; border-radius: var(--radius-md); font-family: var(--font-ui); font-weight: 600; font-size: var(--fs-ui); color: var(--color-text-soft); transition: background-color var(--dur-fast), color var(--dur-fast); position: relative; }
.nav-link:hover { background: var(--color-surface-alt); color: var(--color-text); }
.nav-link[aria-current="page"] { color: var(--color-primary); }
.nav-link.nav-link--feature { color: var(--color-primary); }
.nav-link.nav-link--feature::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 6px; height: 2px; background: var(--color-accent); border-radius: 2px; }
.nav-link.nav-link--sale { color: var(--color-on-primary); background: var(--color-sale); }
.nav-link.nav-link--sale:hover { background: var(--color-primary-hover); }
.nav-link .nav-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); }

/* ---------------- Mobile nav ---------------- */
.menu-btn { display: none; }
.mobile-nav { position: fixed; inset: 0; z-index: var(--z-drawer); visibility: hidden; }
.mobile-nav.is-open { visibility: visible; }
.mobile-nav .mn-scrim { position: absolute; inset: 0; background: var(--color-scrim); opacity: 0; transition: opacity var(--dur-base); }
.mobile-nav.is-open .mn-scrim { opacity: 1; }
.mobile-nav .mn-panel { position: absolute; inset: 0 0 0 auto; width: min(86vw, 380px); background: var(--color-bg); box-shadow: var(--shadow-xl); transform: translateX(100%); transition: transform var(--dur-base) var(--ease-out); display: flex; flex-direction: column; overflow-y: auto; padding: var(--space-4); }
.mobile-nav.is-open .mn-panel { transform: none; }
.mobile-nav .mn-panel a { display: block; padding: 14px 12px; border-radius: var(--radius-md); font-family: var(--font-ui); font-weight: 600; color: var(--color-text); border-bottom: 1px solid var(--color-border); }
.mobile-nav .mn-panel a:hover { background: var(--color-surface-alt); }

/* ---------------- Book card + 3-state add-to-cart ---------------- */
.book-card { position: relative; display: flex; flex-direction: column; }
.book-cover-wrap { position: relative; aspect-ratio: var(--cover-ratio); border-radius: var(--radius-book); overflow: hidden; background: var(--color-surface-alt); box-shadow: var(--shadow-book); transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out); }
.book-card:hover .book-cover-wrap { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.book-cover-wrap img, .book-cover-wrap .cover-fallback { width: 100%; height: 100%; object-fit: cover; }
.book-cover-wrap::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: linear-gradient(90deg, rgba(0,0,0,0.22), rgba(255,255,255,0.12) 60%, rgba(0,0,0,0.04)); } /* spine */
.book-badges { position: absolute; top: 8px; left: 8px; display: flex; flex-direction: column; gap: 5px; z-index: 2; }
.book-wish { position: absolute; top: 8px; right: 8px; z-index: 2; width: 36px; height: 36px; border-radius: 50%; background: color-mix(in srgb, var(--color-surface) 80%, transparent); backdrop-filter: blur(6px); display: grid; place-items: center; color: var(--color-text-soft); box-shadow: var(--shadow-xs); transition: transform var(--dur-fast), color var(--dur-fast); }
.book-wish:hover { transform: scale(1.08); color: var(--color-primary); }
.book-wish svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; }
.book-wish.is-active { color: var(--color-primary); }
.book-wish.is-active svg { fill: currentColor; }

.book-body { padding-top: var(--space-3); display: flex; flex-direction: column; gap: 4px; flex: 1; }
.book-cat { font-family: var(--font-ui); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent-strong); font-weight: 700; }
.book-title { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; line-height: 1.2; color: var(--color-text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.book-card a:hover .book-title { color: var(--color-primary); }
.book-author { font-family: var(--font-ui); font-size: var(--fs-caption); color: var(--color-text-muted); }
.book-rating { display: inline-flex; align-items: center; gap: 5px; font-family: var(--font-ui); font-size: var(--fs-caption); color: var(--color-text-soft); }
.book-rating .stars { color: var(--color-accent); letter-spacing: 1px; }
.book-foot { margin-top: auto; padding-top: var(--space-3); display: flex; flex-direction: column; align-items: stretch; gap: 10px; }
.book-foot .price { display: flex; align-items: baseline; gap: 6px; }
.book-foot .atc, .book-foot .atc--notify { width: 100%; }
.price { font-family: var(--font-ui); font-weight: 700; font-size: var(--fs-price); color: var(--color-text); font-variant-numeric: tabular-nums; }
.price .price-old { font-weight: 500; font-size: var(--fs-caption); color: var(--color-text-muted); text-decoration: line-through; margin-left: 6px; }

/* The premium 3-state add-to-cart button */
.atc {
  position: relative; overflow: hidden; min-width: 116px; min-height: 40px;
  border-radius: var(--radius-pill); border: 1.5px solid var(--color-primary);
  background: transparent; color: var(--color-primary);
  font-family: var(--font-ui); font-weight: 700; font-size: var(--fs-caption);
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.atc svg { width: 16px; height: 16px; }
.atc .atc-state { display: inline-flex; align-items: center; gap: 6px; transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast) var(--ease-out); }
.atc .atc-added, .atc .atc-view { position: absolute; inset: 0; display: inline-flex; align-items: center; justify-content: center; gap: 6px; opacity: 0; transform: translateY(120%); }
.atc:hover { background: var(--color-primary); color: var(--color-on-primary); }
/* state: added */
.atc.is-added { background: var(--color-success); border-color: var(--color-success); color: #fff; }
.atc.is-added .atc-add { opacity: 0; transform: translateY(-120%); }
.atc.is-added .atc-added { opacity: 1; transform: none; }
/* state: view cart */
.atc.is-view { background: var(--color-accent); border-color: var(--color-accent); color: var(--ink-900); }
.atc.is-view .atc-add { opacity: 0; transform: translateY(-120%); }
.atc.is-view .atc-view { opacity: 1; transform: none; }

/* Out-of-stock → notify */
.atc--notify { border-color: var(--color-border-strong); color: var(--color-text-soft); min-width: 116px; }
.atc--notify:hover { background: var(--color-text-soft); border-color: var(--color-text-soft); color: var(--color-bg); }

/* compact card variant for carousels */
.book-card--mini .book-title { font-size: 0.98rem; }

/* ---------------- Carousel / scroll-snap row ---------------- */
.carousel { position: relative; }
.carousel-track { display: grid; grid-auto-flow: column; grid-auto-columns: clamp(155px, 44vw, 188px); gap: var(--space-5); overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: var(--space-3); scrollbar-width: thin; scroll-behavior: smooth; }
.carousel-track > * { scroll-snap-align: start; }
.carousel-track::-webkit-scrollbar { height: 6px; }
.carousel-track::-webkit-scrollbar-thumb { background: var(--color-border-strong); border-radius: 3px; }
.carousel-nav { display: inline-flex; gap: 6px; }
.carousel-nav button { width: 40px; height: 40px; border-radius: 50%; border: 1.5px solid var(--color-border-strong); color: var(--color-text-soft); display: grid; place-items: center; background: var(--color-surface); transition: all var(--dur-fast); }
.carousel-nav button:hover { border-color: var(--color-primary); color: var(--color-primary); }
.carousel-nav button[disabled] { opacity: 0.35; }

/* Overlay arrows that sit over the covers (work at every screen size) */
.carousel-arrow {
  position: absolute; top: 33%; transform: translateY(-50%); z-index: 4;
  width: 44px; height: 44px; border-radius: 50%;
  background: color-mix(in srgb, var(--color-surface) 86%, transparent);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  border: 1px solid var(--color-border); color: var(--color-text);
  display: grid; place-items: center; box-shadow: var(--shadow-md);
  transition: opacity var(--dur-fast), background-color var(--dur-fast), color var(--dur-fast);
}
.carousel-arrow--prev { left: 4px; }
.carousel-arrow--next { right: 4px; }
.carousel-arrow:hover { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary); }
.carousel-arrow[disabled] { opacity: 0; pointer-events: none; }
@media (max-width: 600px) { .carousel-arrow { width: 38px; height: 38px; top: 30%; } }

/* ---------------- Primary-nav dropdowns (Barnes & Noble style) ---------------- */
.nav-item { position: relative; }
.nav-caret { width: 13px !important; height: 13px !important; opacity: 0.55; transition: transform var(--dur-fast) var(--ease-out); }
.nav-item:hover .nav-caret, .nav-item:focus-within .nav-caret { transform: rotate(180deg); }
.nav-dropdown {
  position: absolute; top: 100%; left: 0; min-width: 250px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: var(--space-3); z-index: var(--z-dropdown);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility var(--dur-fast);
}
.nav-dropdown::before { content: ""; position: absolute; top: -10px; left: 0; right: 0; height: 10px; } /* hover bridge */
.nav-item:hover > .nav-dropdown, .nav-item:focus-within > .nav-dropdown { opacity: 1; visibility: visible; transform: none; }
.nav-dropdown--wide { min-width: 460px; display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.nav-dropdown .nd-head { font-family: var(--font-ui); font-size: var(--fs-caption); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); padding: 4px 12px; }
.nav-dropdown a { display: block; padding: 9px 12px; border-radius: var(--radius-sm); font-family: var(--font-ui); font-size: var(--fs-body-sm); font-weight: 500; color: var(--color-text-soft); }
.nav-dropdown a:hover { background: var(--color-surface-alt); color: var(--color-primary); }
.nav-dropdown .nd-all { grid-column: 1 / -1; color: var(--color-primary); font-weight: 700; border-top: 1px solid var(--color-border); margin-top: 6px; padding-top: 10px; display: inline-flex; align-items: center; gap: 6px; }

/* ---- Full-width mega menu (Barnes & Noble style) ---- */
.primary-nav .container { position: relative; }   /* anchor megas to the nav container */
.nav-item { position: static; }                    /* so mega spans full container width */
.mega {
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-xl);
  padding: var(--space-6); z-index: var(--z-dropdown);
  display: grid; grid-template-columns: 1fr minmax(260px, 320px); gap: var(--space-7);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility var(--dur-fast);
}
.mega::before { content: ""; position: absolute; top: -14px; left: 0; right: 0; height: 14px; } /* hover bridge */
.nav-item:hover > .mega, .nav-item:focus-within > .mega { opacity: 1; visibility: visible; transform: none; }
.mega-cols { display: flex; flex-wrap: wrap; gap: var(--space-6) var(--space-7); align-content: flex-start; }
.mega-col { flex: 1 1 170px; min-width: 150px; max-width: 240px; }
.mega-head { font-family: var(--font-ui); font-size: var(--fs-caption); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); margin-bottom: var(--space-2); padding-bottom: 8px; border-bottom: 1px solid var(--color-border); }
.mega-col a { display: block; padding: 7px 0; font-family: var(--font-ui); font-size: var(--fs-body-sm); font-weight: 500; color: var(--color-text-soft); transition: color var(--dur-fast), padding-left var(--dur-fast); }
.mega-col a:hover { color: var(--color-primary); padding-left: 5px; }
.mega-rail { background: var(--color-surface-alt); border-radius: var(--radius-md); padding: var(--space-4); display: flex; flex-direction: column; }
.mega-rail a { display: block; padding: 6px 0; font-family: var(--font-ui); font-size: var(--fs-body-sm); font-weight: 600; color: var(--color-text-soft); }
.mega-rail a:hover { color: var(--color-primary); }
.mega-rail .mega-promo { margin-top: var(--space-3); background: var(--color-primary); color: var(--color-on-primary); border-radius: var(--radius-md); padding: var(--space-4); display: flex; flex-direction: column; gap: 4px; }
.mega-promo-k, .mega-promo-t, .mega-promo-c { display: block; }
.mega-promo:hover { background: var(--color-primary-hover); }
.mega-promo-k { font-family: var(--font-ui); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--brass-200); font-weight: 700; }
.mega-promo-t { font-family: var(--font-display); font-size: 1.15rem; line-height: 1.2; }
.mega-promo-c { font-family: var(--font-ui); font-size: var(--fs-caption); display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; }
.mega-promo svg { width: 15px; height: 15px; }

/* ---------------- Tabs ---------------- */
.tabs { display: inline-flex; gap: 4px; background: var(--color-surface-alt); padding: 5px; border-radius: var(--radius-pill); }
.tab { padding: 8px 18px; border-radius: var(--radius-pill); font-family: var(--font-ui); font-weight: 600; font-size: var(--fs-ui); color: var(--color-text-muted); transition: all var(--dur-fast); }
.tab[aria-selected="true"] { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-xs); }
.tabpanel[hidden] { display: none; }

/* Page-specific organisms (hero, categories, publications, blog,
   membership, events, footer, floating cart, drawer, toast) live in
   components-extra.css, loaded as a separate <link> in each page. */