/* Apple Human Interface Guidelines: Book Catalog Picker Sheet & Dialog */
body.book-picker-open {
  overflow: hidden;
}

.book-picker {
  position: fixed;
  inset: 0;
  margin: auto;
  border: 0.5px solid var(--separator);
  padding: 0;
  width: min(620px, calc(100% - 32px));
  max-height: min(86dvh, 800px);
  background: var(--material-bg);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
  color: var(--label);
  border-radius: var(--radius-sheet);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.book-picker::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.book-picker-shell {
  display: flex;
  flex-direction: column;
  max-height: min(86dvh, 800px);
  background: var(--system-bg);
}

.book-picker-top {
  padding: 20px 22px 16px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  border-bottom: 0.5px solid var(--separator);
  background: var(--material-bg);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
}

.book-picker-top > div {
  min-width: 0;
  flex: 1;
}

.book-picker-top h2 {
  font-size: 24px;
  line-height: 1.18;
  margin: 4px 0 6px;
  font-family: var(--display-font);
  font-weight: 750;
  letter-spacing: -0.03em;
  color: var(--label);
}

.book-picker-top p {
  margin: 0;
  color: var(--secondary-label);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.book-picker-close {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 50%;
  background: var(--tertiary-fill);
  color: var(--secondary-label);
  font-size: 18px;
  display: grid;
  place-items: center;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.book-picker-close:hover {
  background: var(--secondary-fill);
  color: var(--label);
}

.book-picker-close:active {
  transform: scale(0.92);
}

.book-picker-status {
  font-size: 13px;
  color: var(--secondary-label);
  padding: 10px 22px;
  background: var(--tertiary-fill);
  line-height: 1.45;
  border-bottom: 0.5px solid var(--separator);
}

.book-picker-results {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 120px;
}

.book-result {
  min-height: 110px;
  width: 100%;
  display: flex;
  gap: 14px;
  text-align: left;
  background: var(--card-bg);
  border: 0.5px solid var(--separator);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  color: var(--label);
  align-items: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s cubic-bezier(0.25, 1, 0.5, 1), background-color 0.15s ease;
}

.book-result:hover {
  background: var(--tertiary-fill);
}

.book-result:active {
  transform: scale(0.985);
  background: var(--secondary-fill);
}

.book-result:focus-visible {
  outline: 3px solid var(--accent-ring);
  outline-offset: 2px;
}

.book-result-cover {
  height: 96px;
  width: 68px;
  min-width: 68px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: var(--radius-xs);
  overflow: hidden;
  background: var(--tertiary-fill);
  border: 0.5px solid var(--separator);
}

.book-result-cover img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.book-cover-placeholder {
  font-size: 26px;
}

.book-result-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.book-result-copy strong {
  font-size: 15px;
  line-height: 1.25;
  font-weight: 700;
  overflow-wrap: anywhere;
  color: var(--label);
}

.book-result-copy > span {
  font-size: 13px;
  color: var(--secondary-label);
  line-height: 1.3;
}

.book-result-copy small {
  font-size: 12px;
  color: var(--tertiary-label);
  line-height: 1.35;
}

.book-result-copy em {
  font-style: normal;
  font-size: 13px;
  font-weight: 650;
  color: var(--accent);
  margin-top: 4px;
}

.book-picker-empty {
  color: var(--secondary-label);
  font-size: 14px;
  padding: 30px 16px;
  text-align: center;
}

.book-picker-bottom {
  border-top: 0.5px solid var(--separator);
  padding: 14px 18px calc(14px + env(safe-area-inset-bottom));
  background: var(--material-bg);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
}

.book-picker-bottom .outline {
  width: 100%;
  min-height: 49px;
  color: var(--accent);
  font-weight: 650;
}

/* Mobile Apple iOS Bottom Sheet */
@media (max-width: 700px) {
  .book-picker {
    margin: 0;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 88dvh;
    width: 100%;
    border-radius: var(--radius-sheet) var(--radius-sheet) 0 0;
    box-shadow: var(--shadow-sheet);
  }

  .book-picker-shell {
    max-height: 88dvh;
    border-radius: var(--radius-sheet) var(--radius-sheet) 0 0;
  }

  .book-picker-top {
    padding: 16px 18px 12px;
  }

  .book-picker-top h2 {
    font-size: 22px;
  }

  .book-picker-results {
    padding: 10px 14px;
    gap: 8px;
  }

  .book-result {
    padding: 10px 12px;
    gap: 12px;
    min-height: 100px;
  }

  .book-result-cover {
    height: 86px;
    width: 60px;
    min-width: 60px;
  }

  .book-result-copy strong {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-picker * {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}