/* Trình lật trang hồ sơ năng lực (khối [[HO-SO-PDF]]). Chỉ tải trên trang có khối này.
   Chuyển từ bản clone (custom.css .flipbook-*), đổi biến màu sang bộ biến của site.css. */
.flipbook-khung { margin: 26px 0 30px; padding: 26px 16px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(180deg, var(--bg-2), #fff); }
.flipbook { display: flex; align-items: center; justify-content: center; gap: 18px; }
.flipbook-stage { position: relative; width: 100%; max-width: 520px; aspect-ratio: 1600 / 2263; perspective: 2400px; border-radius: 6px; box-shadow: 0 24px 60px rgba(15, 61, 51, .28); background: #fff; }
.flipbook-page { position: absolute; inset: 0; border-radius: 6px; overflow: hidden; display: flex; align-items: center; justify-content: center; background: #fff; }
.flipbook-page canvas { width: 100%; height: auto; max-height: 100%; display: block; }
.flipbook-loading { position: absolute; inset: 0; z-index: 5; display: flex; align-items: center; justify-content: center; padding: 20px; text-align: center; background: rgba(255, 255, 255, .88); color: var(--brand-2); font-size: .88rem; font-weight: 600; border-radius: 6px; }
.flipbook-page-under { z-index: 1; }
.flipbook-page-top { z-index: 2; transform: rotateY(0deg); transform-origin: left center; backface-visibility: hidden; box-shadow: 2px 0 12px rgba(0, 0, 0, .08); }
.flipbook-page-top::after { content: ''; position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .55s cubic-bezier(.45, 0, .2, 1); }
.flipbook-page-top.flip-next { transition: transform .55s cubic-bezier(.45, 0, .2, 1); transform-origin: left center; transform: rotateY(-110deg); }
.flipbook-page-top.flip-next::after { opacity: 1; background: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, .35) 100%); }
.flipbook-page-top.flip-prev { transition: transform .55s cubic-bezier(.45, 0, .2, 1); transform-origin: right center; transform: rotateY(110deg); }
.flipbook-page-top.flip-prev::after { opacity: 1; background: linear-gradient(270deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, .35) 100%); }
.flipbook-page-under::before { content: ''; position: absolute; inset: 0; background: rgba(0, 0, 0, .18); pointer-events: none; }
.flipbook-tap { position: absolute; top: 0; bottom: 0; width: 34%; z-index: 3; background: none; border: 0; cursor: pointer; padding: 0; }
.flipbook-tap-left { left: 0; }
.flipbook-tap-right { right: 0; }
.flipbook-nav { flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%; background: #fff; border: 1px solid var(--line); color: var(--brand-2); display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background .15s, color .15s, transform .15s; box-shadow: 0 8px 20px rgba(15, 61, 51, .12); }
.flipbook-nav:hover, .flipbook-nav:focus-visible { background: var(--brand); color: #fff; transform: translateY(-2px); }
.flipbook-toolbar { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 22px; }
.flipbook-tool-btn { width: 36px; height: 36px; border-radius: 50%; background: var(--bg-2); border: 1px solid var(--line); color: var(--brand-2); display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background .15s, color .15s; }
.flipbook-tool-btn:hover, .flipbook-tool-btn:focus-visible { background: var(--brand); color: #fff; }
.flipbook-counter { display: flex; align-items: center; gap: 6px; margin: 0; font-size: .88rem; color: var(--ink-2); }
.flipbook-counter input { width: 56px; text-align: center; padding: 6px 4px; border: 1px solid var(--line); border-radius: 6px; font: inherit; color: var(--ink); }
.flipbook-tai { margin: 18px 0 0; text-align: center; }
.prose .flipbook-tai a.btn { text-decoration: none; }

@media (max-width: 640px) {
  /* điện thoại: nút trước/sau nổi trên mép trang để trang PDF chiếm hết bề ngang */
  .flipbook-khung { padding: 14px 6px 16px; }
  .flipbook { position: relative; gap: 0; }
  .flipbook-stage { max-width: 100%; }
  .flipbook-nav { position: absolute; top: 50%; z-index: 6; width: 36px; height: 36px; margin-top: -18px; opacity: .92; }
  #fb-prev { left: 4px; }
  #fb-next { right: 4px; }
  .flipbook-nav:hover, .flipbook-nav:focus-visible { transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .flipbook-page-top.flip-next, .flipbook-page-top.flip-prev { transition: none; }
}