/* ==========================================================================
   book-card.css — карточка книги, сетка каталога, лента «Новые книги», тултип.
   Единственное место со стилями .book-card*, .material-grid, .book-carousel*.
   Цвета только из tokens.css; движение — значения transitions-dev (см. tokens.css).
   ========================================================================== */

/* --- Сетка каталога ------------------------------------------------------ */
.material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11.5rem, 1fr));
  gap: var(--space-5) var(--space-4);
}

/* --- Карточка ------------------------------------------------------------ */
.book-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-raised);
  box-shadow: var(--shadow-1);
}

.book-card__cover {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 2 / 3;
  overflow: hidden;
  background: var(--color-surface-sunken);
  color: var(--color-text-muted);
  text-decoration: none;
}
.book-card__cover img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* Корешок: тонкая тень у левого края, как у настоящей книги. */
.book-card__cover::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0.5rem;
  background: linear-gradient(90deg, color-mix(in srgb, var(--color-text) 28%, transparent), transparent);
  pointer-events: none;
}
.book-card__cover:focus-visible { outline: 3px solid var(--color-primary); outline-offset: -3px; }

.book-card__no-cover {
  display: grid;
  justify-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  color: var(--color-primary);
  font-size: var(--text-xs);
  text-align: center;
}
.book-card__no-cover .icon { width: 2.5rem; height: 2.5rem; }

.book-card__type {
  position: absolute;
  inset: auto auto var(--space-2) var(--space-2);
  z-index: 1;
  max-width: calc(100% - var(--space-4));
  padding: 0.125rem var(--space-2);
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Замок: чтение и скачивание только после входа. Подсказка — тултип transitions-dev. */
.book-card > .book-card__lock {
  position: absolute;
  inset: var(--space-2) var(--space-2) auto auto;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  color: var(--color-primary);
  box-shadow: var(--shadow-1);
}
.book-card__lock .icon { width: 1rem; height: 1rem; }
.book-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
}
.book-card__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: var(--leading-snug);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
}
.book-card__title a { color: var(--color-text); text-decoration: none; }
.book-card__title a::after { content: ""; position: absolute; inset: 0; } /* вся карточка кликабельна */
.book-card__title a:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }

.book-card__authors {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  line-height: var(--leading-snug);
}
.book-card__authors .icon { width: 1rem; height: 1rem; margin-block-start: 0.1rem; }
.book-card__authors > span { overflow-wrap: anywhere; }

.book-card__facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  margin: auto 0 0;
  padding: var(--space-2) 0 0;
  border-block-start: 1px dashed var(--color-border);
  list-style: none;
}
.book-card__fact {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-width: 0;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  line-height: var(--leading-snug);
}
.book-card__fact .icon { width: 0.875rem; height: 0.875rem; }
.book-card__fact--direction, .book-card__fact--category {
  padding: 0.125rem var(--space-2);
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-on-primary-soft);
  font-weight: 600;
}
.book-card__fact--direction > span, .book-card__fact--category > span { overflow-wrap: anywhere; }

.book-card__edit {
  position: relative; /* выше растянутой ссылки заголовка */
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  align-self: flex-start;
  min-height: 2.25rem;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  text-decoration: none;
}
.book-card__edit .icon { width: 1rem; height: 1rem; }
.book-card__edit:hover, .book-card__edit:focus-visible { background: var(--color-primary-soft); }

/* --- Лента «Новые книги» -------------------------------------------------- */
.book-carousel .section-head { flex-wrap: wrap; }
.book-carousel .section-link { white-space: nowrap; }
.section-head__tools { display: flex; align-items: center; gap: var(--space-4); margin-inline-start: auto; }
.book-carousel__controls { display: flex; align-items: center; gap: var(--space-2); }
.book-carousel__controls[hidden] { display: none; }

.book-carousel__btn {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--color-border-input);
  border-radius: 50%;
  background: var(--color-surface-raised);
  color: var(--color-primary);
  cursor: pointer;
  touch-action: manipulation;
}
.book-carousel__btn:hover:not(:disabled) { background: var(--color-primary-soft); }
.book-carousel__btn:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }
.book-carousel__btn:disabled { opacity: 0.4; cursor: default; }
.icon--flip { transform: scaleX(-1); }

.book-carousel__track {
  display: flex;
  gap: var(--space-4);
  /* Поля сверху/снизу оставляют место для подъёма карточки и её тени: overflow-x обрезает и по вертикали. */
  padding: var(--space-2) var(--space-1) var(--space-4);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--space-1);
  scrollbar-width: thin;
  touch-action: pan-x pan-y;
}
.book-carousel__slide {
  display: flex;
  flex: 0 0 clamp(10.5rem, 46vw, 13.5rem);
  scroll-snap-align: start;
}
.book-carousel__slide > .book-card { width: 100%; }

/* --- Тултип (transitions-dev 17, чистый CSS) ------------------------------- */
.t-tt-wrap { position: relative; display: inline-block; }
.t-tt {
  position: absolute;
  inset: auto auto calc(100% + 8px) 50%;
  transform: translate(-50%, 0) scale(var(--tt-scale));
  transform-origin: 50% 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--tt-bg);
  color: var(--tt-fg);
  font-size: var(--text-xs);
  white-space: nowrap;
  box-shadow: var(--shadow-2);
  opacity: 0;
  pointer-events: none;
  z-index: 5;
}
.t-tt-wrap:hover .t-tt,
.t-tt-trigger:focus-visible + .t-tt {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

/* Тултип замка выровнен по правому краю карточки и раскрывается вниз. */
.book-card__lock .t-tt,
.book-card__lock:hover .t-tt {
  inset: calc(100% + 8px) 0 auto auto;
  transform-origin: 100% 0;
  width: max-content;
  max-width: 11rem;
  white-space: normal;
  line-height: var(--leading-snug);
}
.book-card__lock .t-tt { transform: scale(var(--tt-scale)); }
.book-card__lock:hover .t-tt { transform: scale(1); }

/* --- Движение -------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .book-card {
    transition: transform var(--card-lift-dur) var(--card-lift-ease), box-shadow var(--card-lift-dur) var(--card-lift-ease), border-color var(--hover-dur) ease-out;
  }
  .book-card:hover, .book-card:focus-within {
    transform: translateY(var(--card-lift));
    box-shadow: var(--shadow-2);
    border-color: var(--color-primary);
  }
  .book-card__cover img { transition: transform var(--card-lift-dur) var(--card-lift-ease); }
  .book-card:hover .book-card__cover img { transform: scale(1.04); }

  .book-carousel__track { scroll-behavior: smooth; }
  .book-carousel__btn {
    transition: background-color var(--hover-dur) ease-out, scale var(--press-dur) ease-out, opacity var(--hover-dur) ease-out;
  }
  .book-carousel__btn:active:not(:disabled) { scale: 0.94; }
  .book-carousel__btn .icon { transition: transform var(--card-lift-dur) var(--card-lift-ease); }
  .book-carousel__btn:hover:not(:disabled) .icon { transform: translateX(2px); }
  .book-carousel__btn:hover:not(:disabled) .icon--flip { transform: scaleX(-1) translateX(2px); }

  .t-tt {
    transition: opacity var(--tt-out-dur) var(--tt-out-ease), transform var(--tt-out-dur) var(--tt-out-ease);
  }
  .t-tt-wrap:hover .t-tt, .t-tt-trigger:focus-visible + .t-tt {
    transition-duration: var(--tt-in-dur);
    transition-timing-function: var(--tt-in-ease);
    transition-delay: var(--tt-delay);
  }
}
@media (prefers-reduced-motion: reduce) {
  .t-tt { transition: none !important; }
}
@media (hover: none) {
  .t-tt { display: none; } /* на сенсорных экранах тултипов нет: у кнопок есть aria-label */
}