button[data-law-book-open] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 6px 12px;
  border: 1px solid var(--study-line, #d9e2eb);
  border-radius: 4px;
  background: var(--study-surface, #fff);
  color: var(--study-accent, #087c66);
  font: 700 13px/1.25 Arial, sans-serif;
  cursor: pointer;
}
button[data-law-book-open]:hover { background: var(--study-wash, #f3f6fa); }
button[data-law-book-open]:focus-visible {
  outline: 3px solid var(--study-accent, #087c66);
  outline-offset: 3px;
}
button[data-law-book-open][hidden] { display: none !important; }

dialog#cafa-law-book {
  box-sizing: border-box;
  width: min(760px, calc(100vw - 24px));
  max-width: 760px;
  max-height: calc(100dvh - 32px);
  min-height: min(420px, calc(100dvh - 32px));
  margin: auto;
  padding: 0;
  border: 1px solid var(--study-line, #d9e2eb);
  border-radius: 12px;
  background: var(--study-surface, #fff);
  color: var(--study-ink, #292e42);
  box-shadow: 0 18px 70px #07172655;
  font: 15px/1.55 Arial, sans-serif;
  overflow: hidden;
}
dialog#cafa-law-book:not([open]) { display: none; }
dialog#cafa-law-book[open] { display: flex; flex-direction: column; }
dialog#cafa-law-book::backdrop { background: #0b142bb3; }

.cafa-law-book-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex: none;
  padding: 18px 22px;
  border-bottom: 1px solid var(--study-line, #d9e2eb);
  background: var(--study-wash, #f3f6fa);
}
.cafa-law-book-head h2 {
  margin: 0;
  color: var(--study-ink, #292e42);
  font-size: 23px;
  line-height: 1.25;
}
.cafa-law-book-head p {
  margin: 0 0 5px;
  color: var(--study-muted, #58677a);
  font-size: 11px;
  line-height: 1.35;
}
.cafa-law-book-head button {
  flex: none;
  min-width: 38px;
  min-height: 38px;
  padding: 5px 9px;
  border: 1px solid var(--study-line, #d9e2eb);
  border-radius: 6px;
  background: var(--study-surface, #fff);
  color: var(--study-ink, #292e42);
  font: inherit;
  cursor: pointer;
}
.cafa-law-book-head button:hover { border-color: var(--study-accent, #087c66); }
.cafa-law-book-head button:focus-visible,
.cafa-law-book-tools input:focus-visible,
.cafa-law-book-list summary:focus-visible {
  outline: 2px solid var(--study-accent, #087c66);
  outline-offset: -2px;
}

.cafa-law-book-tools {
  flex: none;
  padding: 16px 22px 12px;
  border-bottom: 1px solid var(--study-line, #d9e2eb);
}
.cafa-law-book-tools label { display: block; font-size: 13px; font-weight: 700; }
.cafa-law-book-tools input {
  box-sizing: border-box;
  display: block;
  width: 100%;
  min-height: 42px;
  margin-top: 7px;
  padding: 8px 11px;
  border: 1px solid var(--study-line, #d9e2eb);
  border-radius: 6px;
  background: var(--study-surface, #fff);
  color: var(--study-ink, #292e42);
  font: 16px/1.3 Arial, sans-serif;
}
.cafa-law-book-count {
  margin: 8px 0 0;
  color: var(--study-muted, #58677a);
  font-size: 12px;
}

.cafa-law-book-list {
  flex: 1 1 auto;
  min-height: 0;
  padding: 14px 22px 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.cafa-law-book-list details[data-law-book-entry] {
  margin: 0 0 8px;
  border: 1px solid var(--study-line, #d9e2eb);
  border-radius: 7px;
  background: var(--study-surface, #fff);
  overflow: hidden;
}
.cafa-law-book-list details[data-law-book-entry][hidden] { display: none; }
.cafa-law-book-list summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 45px;
  padding: 10px 13px;
  list-style: none;
  cursor: pointer;
}
.cafa-law-book-list summary::-webkit-details-marker { display: none; }
.cafa-law-book-list summary:hover,
.cafa-law-book-list details[open] summary { background: var(--study-wash, #f3f6fa); }
.cafa-law-book-list summary span:first-child {
  color: var(--study-purple, #6857a0);
  font-weight: 700;
  white-space: nowrap;
}
.cafa-law-book-list summary span:nth-child(2) { min-width: 0; overflow-wrap: anywhere; }
.cafa-law-book-list summary::after {
  content: '+';
  color: var(--study-muted, #58677a);
  font-size: 20px;
  line-height: 1;
}
.cafa-law-book-list details[open] summary::after { content: '−'; }
.cafa-law-book-text {
  padding: 8px 15px 15px;
  border-top: 1px solid var(--study-line, #d9e2eb);
  overflow-wrap: break-word;
}
.cafa-law-book-text p { margin: 9px 0; line-height: 1.65; }
.cafa-law-book-text .cafa-law-book-source {
  color: var(--study-muted, #58677a);
  font-size: 12px;
}
.cafa-law-book-empty {
  margin: 12px 0;
  padding: 18px;
  border: 1px dashed var(--study-line, #d9e2eb);
  border-radius: 7px;
  color: var(--study-muted, #58677a);
  text-align: center;
}
.cafa-law-book-empty[hidden] { display: none; }
dialog#cafa-law-book > footer {
  flex: none;
  padding: 10px 22px;
  border-top: 1px solid var(--study-line, #d9e2eb);
  color: var(--study-muted, #58677a);
  font-size: 11px;
  line-height: 1.45;
}

@media (max-width: 760px) {
  button[data-law-book-open] {
    min-height: 36px;
    padding: 6px 9px;
    font-size: 12px;
  }
  dialog#cafa-law-book {
    width: calc(100vw - 16px);
    max-width: none;
    max-height: calc(100dvh - 16px);
    min-height: min(380px, calc(100dvh - 16px));
    border-radius: 9px;
  }
  .cafa-law-book-head { padding: 15px; }
  .cafa-law-book-head h2 { font-size: 20px; }
  .cafa-law-book-tools { padding: 13px 15px 11px; }
  .cafa-law-book-list { padding: 12px 15px 15px; }
  .cafa-law-book-list summary { gap: 8px; padding: 10px; font-size: 13px; }
  .cafa-law-book-text { padding: 7px 11px 12px; font-size: 14px; }
  dialog#cafa-law-book > footer { padding: 9px 15px; }
}

@media (max-width: 540px) {
  .question-nav button[data-law-book-open] {
    position: absolute;
    top: 6px;
    right: 7px;
  }
}

@media print {
  button[data-law-book-open], dialog#cafa-law-book { display: none !important; }
}