/* The Story Book (web/src/storybook/*.ts, spec v5 5 Oct 2026): questions and stories as the pages of a book.
   One page on a phone or tablet in portrait; an open book (two pages, a leaf turning over the spine) at 1100 px
   and wider in landscape. Colours are the palette's tokens (--ys-paper, --ys-ink, --ys-muted, --ys-line, --ys-btn,
   --ys-on-btn, --ys-focus), so the dark and high-contrast themes read as they do elsewhere; sizes are in em of
   the person's text size (--ys-scale). Reduced motion: the pages cross-fade instead of turning. */

dialog.sb-book-dialog {
  width: 100vw; max-width: 100vw; height: 100dvh; max-height: 100dvh; margin: 0; padding: 0; border: 0; border-radius: 0;
  background: var(--ys-paper); color: var(--ys-ink); overflow: hidden; box-sizing: border-box;
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif; font-size: calc(16px * var(--ys-scale, 1)); line-height: 1.5;
}
dialog.sb-book-dialog[open] { display: flex; flex-direction: column; }
dialog.sb-book-dialog::backdrop { background: rgba(8, 20, 16, .8); }
#sb-book [hidden], #sb-answer [hidden] { display: none !important; }
#sb-book :focus-visible, #sb-answer :focus-visible { outline: 3px solid var(--ys-focus, #0b3d91); outline-offset: 2px; }

/* Buttons: one compact family (the carried UI's dialog buttons are dark green everywhere). */
#sb-book button, #sb-answer button:not(.ys-capture-btn) {
  font: inherit; font-family: system-ui, -apple-system, 'Segoe UI', sans-serif; font-size: .95em; font-weight: 600; min-height: 44px; min-width: 44px; padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--ys-line); background: var(--ys-paper); color: var(--ys-ink); cursor: pointer; line-height: 1.2;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; text-align: center;
}
#sb-book button:hover, #sb-answer button:not(.ys-capture-btn):hover { background: color-mix(in srgb, var(--ys-ink) 8%, var(--ys-paper)); }
#sb-book button:disabled, #sb-answer button:not(.ys-capture-btn):disabled { opacity: .45; cursor: default; }
#sb-book button.ys-primary, #sb-answer button:not(.ys-capture-btn).ys-primary { background: var(--ys-btn); border-color: var(--ys-btn); color: var(--ys-on-btn); }
#sb-book button.ys-primary:hover, #sb-answer button:not(.ys-capture-btn).ys-primary:hover { background: var(--ys-btn-hover, var(--ys-btn)); }
#sb-book button.ys-danger, #sb-answer button:not(.ys-capture-btn).ys-danger { background: var(--ys-error, #8b0000); border-color: var(--ys-error, #8b0000); color: #fff; }
#sb-book button.sb-link { border-color: transparent; background: transparent; padding: 6px 10px; min-height: 40px; }
#sb-book button.sb-link:hover { border-color: var(--ys-line); }
#sb-book button[aria-pressed="true"], #sb-answer button:not(.ys-capture-btn)[aria-pressed="true"] { box-shadow: inset 0 0 0 2px var(--ys-ink); }
#sb-book .ys-ico, #sb-answer .ys-ico { width: 1.15em; height: 1.15em; flex: 0 0 auto; }
#sb-book select, #sb-book input[type="text"], #sb-book input[type="number"], #sb-answer select, #sb-answer input[type="text"], #sb-answer textarea {
  font: inherit; min-height: 44px; box-sizing: border-box; padding: 6px 10px; border: 1px solid var(--ys-line); border-radius: 8px;
  background: var(--ys-paper); color: var(--ys-ink); max-width: 100%; margin: 0;
}
#sb-book input[type="checkbox"] { width: 22px; height: 22px; margin: 0; accent-color: var(--ys-btn); }
.sb-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 10px 0 0; }
.sb-muted { color: var(--ys-muted); }
.sb-check { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; cursor: pointer; }
.sb-badge { display: inline-block; font: 600 .78em/1.4 system-ui, sans-serif; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--ys-line); color: var(--ys-ink); margin: 0 4px 0 0; }

/* Head and foot */
.sb-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 6px 12px; border-bottom: 1px solid var(--ys-line); }
.sb-title { margin: 0; font: 600 1.1em/1.2 Literata, Georgia, serif; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sb-tools { display: flex; gap: 6px; align-items: center; flex: 0 0 auto; }
#sb-book .sb-close { border-radius: 50%; padding: 0; width: 44px; }
.sb-foot { border-top: 1px solid var(--ys-line); padding: 4px 12px calc(6px + env(safe-area-inset-bottom, 0px)); }
.sb-pager { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.sb-page-no { font-size: .9em; color: var(--ys-muted); font-variant-numeric: tabular-nums; text-align: center; }
.sb-toast { margin: 4px 0; font-weight: 600; }
.sb-toast[data-tone="error"] { color: var(--ys-error, #8b0000); }
.sb-toast[data-tone="warn"] { color: var(--ys-warn, #6b3200); }
.sb-guide { padding: 6px 0 2px; border-bottom: 1px solid var(--ys-line); margin-bottom: 4px; }
.sb-guide-text { margin: 0; font-weight: 700; }
.sb-guide .sb-row { margin-top: 6px; justify-content: flex-end; }
html[data-hand="left"] .sb-guide .sb-row { flex-direction: row-reverse; justify-content: flex-end; }

/* The desk, the book and its pages */
.sb-stage {
  flex: 1 1 auto; min-height: 0; display: flex; justify-content: center; align-items: stretch; padding: 10px;
  perspective: 2400px; touch-action: pan-y; background: color-mix(in srgb, var(--ys-ink) 9%, var(--ys-paper));
}
.sb-stage[data-loading] { opacity: .6; }
.sb-spread { position: relative; display: flex; width: 100%; max-width: 760px; transform-style: preserve-3d; }
.sb-stage[data-layout="spread"] .sb-spread { max-width: 1400px; }
.sb-slot { flex: 1 1 0; min-width: 0; display: flex; }
.sb-page {
  flex: 1 1 auto; min-width: 0; position: relative; overflow-y: auto; overscroll-behavior: contain; box-sizing: border-box;
  background: var(--ys-paper); color: var(--ys-ink); border: 1px solid var(--ys-line); border-radius: 6px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .18);
}
.sb-stage[data-layout="spread"] .sb-slot-left .sb-page { border-radius: 8px 0 0 8px; border-right-color: transparent;
  background-image: linear-gradient(to left, rgba(0, 0, 0, .12), transparent 28px); }
.sb-stage[data-layout="spread"] .sb-slot-right .sb-page { border-radius: 0 8px 8px 0;
  background-image: linear-gradient(to right, rgba(0, 0, 0, .12), transparent 28px); }
.sb-page-inner { position: relative; min-height: 100%; box-sizing: border-box; max-width: 64ch; margin: 0 auto;
  padding: clamp(16px, 4vw, 40px) clamp(16px, 4.5vw, 48px) 52px; font-family: Literata, Georgia, 'Times New Roman', serif; }
.sb-page-blank { background-image: none; }
.sb-folio { position: absolute; left: 0; right: 0; bottom: 14px; margin: 0; text-align: center; font: .85em/1 Literata, Georgia, serif; color: var(--ys-muted); }
.sb-eyebrow { margin: 0 0 8px; font: 700 .76em/1.3 system-ui, sans-serif; letter-spacing: .08em; text-transform: uppercase; color: var(--ys-muted); }
.sb-page-title, .sb-chapter-title, .sb-cover-title, .sb-question, .sb-story-heading { font-family: Literata, Georgia, serif; font-weight: 500; margin: 0 0 14px; text-wrap: balance; }
.sb-page-title { font-size: 1.5em; }
.sb-question { font-size: 1.4em; line-height: 1.28; }
.sb-story-heading { font-size: 1.35em; }
.sb-chapter-no { margin: 18% 0 6px; font: 700 .8em/1.2 system-ui, sans-serif; letter-spacing: .14em; text-transform: uppercase; color: var(--ys-muted); text-align: center; }
.sb-chapter-title { font-size: 2em; line-height: 1.15; text-align: center; }
.sb-page-opener .sb-note, .sb-page-opener .sb-progress, .sb-page-opener .sb-always { text-align: center; color: var(--ys-muted); }
.sb-page-opener .sb-row { justify-content: center; }
.sb-page-opener .sb-badge-in { display: table; margin: 8px auto; }
.sb-include-choice { margin: 18px 0; padding: 12px; border: 1px solid var(--ys-line); border-radius: 10px; }
.sb-include-choice .sb-ask { margin: 0; font-weight: 700; text-align: center; font-family: system-ui, sans-serif; }
.sb-page-cover .sb-page-inner { display: flex; flex-direction: column; justify-content: center; text-align: center; }
.sb-cover-title { font-size: clamp(1.8em, 5vw, 2.6em); line-height: 1.15; }
.sb-motto { font-family: 'BMSG Caveat', Caveat, cursive; font-size: 1.5em; color: var(--ys-muted); margin: 0 0 20px; }
.sb-cover-actions { display: grid; gap: 10px; justify-items: center; }
.sb-cover-actions button { min-width: min(18em, 100%); }

/* Contents */
.sb-toc { list-style: none; margin: 0; padding: 0; font-family: system-ui, sans-serif; }
.sb-toc li { display: flex; align-items: center; gap: 6px; border-bottom: 1px dotted var(--ys-line); padding: 2px 0; }
#sb-book .sb-toc-link { flex: 1 1 auto; justify-content: flex-start; text-align: left; border-color: transparent; background: transparent; padding: 6px 4px; min-height: 40px; font-weight: 600; }
.sb-toc-meta { font-size: .82em; color: var(--ys-muted); white-space: nowrap; }
.sb-toc-page { min-width: 2.2em; text-align: right; font-variant-numeric: tabular-nums; font-family: Literata, Georgia, serif; }
.sb-toc-out .sb-toc-title { flex: 1 1 auto; color: var(--ys-muted); text-decoration: line-through; padding: 6px 4px; }
.sb-toc-tools { justify-content: center; font-family: system-ui, sans-serif; }

/* Answers and stories on a page */
.sb-answers { display: grid; gap: 12px; margin: 0 0 8px; }
.sb-story { border-left: 3px solid var(--ys-line); padding: 2px 0 2px 14px; }
.sb-story-title { margin: 0 0 4px; font: 600 1.1em/1.3 Literata, Georgia, serif; }
.sb-words p { margin: 0 0 .7em; font-size: 1.05em; }
.sb-context { font-style: italic; color: var(--ys-muted); margin: 0 0 6px; }
.sb-answer-status { font-weight: 600; margin: 0 0 4px; }
.sb-story-meta { margin: 0; font: .85em/1.4 system-ui, sans-serif; color: var(--ys-muted); }
.sb-story-row { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; font: .9em/1.3 system-ui, sans-serif; }
.sb-more > summary { min-height: 44px; display: inline-flex; align-items: center; cursor: pointer; font-weight: 600; padding: 0 10px; border-radius: 999px; }
.sb-more > summary:hover { background: color-mix(in srgb, var(--ys-ink) 8%, var(--ys-paper)); }
.sb-more[open] { flex-basis: 100%; }
.sb-more-actions { display: flex; flex-wrap: wrap; gap: 4px; }
.sb-when, .sb-cut, .sb-form { display: grid; gap: 6px; margin: 8px 0; padding: 10px; border: 1px dashed var(--ys-line); border-radius: 10px; font-family: system-ui, sans-serif; }
.sb-confirm { margin: 8px 0; padding: 10px 12px; border: 2px solid var(--ys-error, #8b0000); border-radius: 10px; font-family: system-ui, sans-serif; }
.sb-confirm p { margin: 0; }
.sb-pending { font-style: italic; color: var(--ys-muted); }
.sb-q-actions, .sb-q-later { font-family: system-ui, sans-serif; }
.sb-date { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: end; }
.sb-date legend { font-weight: 700; padding: 0; margin-bottom: 4px; }
.sb-date-part { display: grid; gap: 2px; }
.sb-date input[type="number"] { width: 7em; }
.sb-label { font-weight: 700; margin: 4px 0 0; }
.sb-cats { display: flex; flex-wrap: wrap; gap: 0 14px; }

/* The leaf (a page turning) */
.sb-leaf { position: absolute; top: 0; bottom: 0; left: 0; width: 100%; transform-style: preserve-3d; transform-origin: left center; z-index: 5; pointer-events: none; will-change: transform; }
.sb-leaf[data-layout="spread"][data-dir="next"] { left: 50%; width: 50%; transform-origin: left center; }
.sb-leaf[data-layout="spread"][data-dir="prev"] { left: 0; width: 50%; transform-origin: right center; }
.sb-face { position: absolute; inset: 0; display: flex; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.sb-face-back { transform: rotateY(180deg); }
.sb-face .sb-page { box-shadow: 0 10px 34px rgba(0, 0, 0, .32); overflow: hidden; }
.sb-face-empty { flex: 1; }
.sb-stage.sb-fade .sb-spread { animation: sb-fade .2s ease-out; }
@keyframes sb-fade { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .sb-stage.sb-fade .sb-spread { animation-duration: .12s; } }

/* Inboxes */
.sb-panel { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 10px 16px 20px; }
.sb-panel-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; max-width: 820px; margin: 0 auto; }
.sb-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.sb-panel-body { max-width: 820px; margin: 0 auto; }
.sb-panel-body h3 { font: 600 1.25em/1.3 Literata, Georgia, serif; margin: 16px 0 4px; }
.sb-list { list-style: none; margin: 8px 0; padding: 0; display: grid; gap: 8px; }
.sb-mem, .sb-story-row-item { border: 1px solid var(--ys-line); border-radius: 10px; padding: 8px 12px; }
.sb-mem-head { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: .9em; color: var(--ys-muted); }
.sb-mem-words { margin: 4px 0 0; }
.sb-story-row-item { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.sb-story-row-item .sb-row { flex-basis: 100%; margin-top: 4px; }
.sb-story-name { flex: 1 1 10em; font-weight: 600; overflow-wrap: anywhere; }
#sb-book .sb-drag { touch-action: none; cursor: grab; border-radius: 10px; padding: 0; width: 44px; font-size: 1.2em; }
html[data-hand="left"] .sb-story-row-item { flex-direction: row-reverse; }
.sb-drop-list { grid-template-columns: repeat(auto-fill, minmax(min(100%, 15em), 1fr)); align-items: start; }
.sb-drop-list > li { border: 1px solid var(--ys-line); border-radius: 10px; padding: 0 10px; }
.sb-drop-list summary { min-height: 44px; display: flex; align-items: center; cursor: pointer; }
.sb-drop-title { font-weight: 700; }
.sb-drop-inbox { border: 2px dashed var(--ys-line); border-radius: 12px; padding: 4px 8px; }
.sb-drop-over { outline: 3px dashed var(--ys-focus, #0b3d91); outline-offset: 2px; background: color-mix(in srgb, var(--ys-focus, #0b3d91) 10%, var(--ys-paper)); }
.sb-drag-ghost { position: fixed; left: 0; top: 0; z-index: 20; pointer-events: none; max-width: 60vw; padding: 6px 12px; border-radius: 10px;
  background: var(--ys-btn); color: var(--ys-on-btn); font-weight: 700; box-shadow: 0 6px 18px rgba(0, 0, 0, .3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-warn { border-left: 4px solid var(--ys-warn, #6b3200); padding: 6px 12px; }
.sb-ok { font-weight: 700; }

/* "Answer this" */
dialog.sb-answer-dialog {
  width: min(640px, calc(100vw - 16px)); max-height: calc(100dvh - 16px); box-sizing: border-box; padding: 14px 18px 18px; margin: auto;
  border-radius: 14px; border: 2px solid var(--ys-line); background: var(--ys-paper); color: var(--ys-ink); overflow: auto;
  font-size: calc(16px * var(--ys-scale, 1)); line-height: 1.5;
}
dialog.sb-answer-dialog::backdrop { background: rgba(8, 20, 16, .7); }
#sb-answer .sb-answer-close { float: right; border-radius: 50%; padding: 0 12px; }
#sb-answer .sb-question { font: 500 1.3em/1.3 Literata, Georgia, serif; margin: 0 0 10px; }
#sb-answer .sb-answer-mode { display: grid; gap: 6px; margin-top: 10px; }
#sb-answer textarea { width: 100%; resize: vertical; min-height: 8em; }

/* Home: "My Story Book" beside My books and the Family button (index.ts). */
#welcome39 #ys-home-storybook { grid-column: 1 / -1; flex: 1 0 100%; display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; }
#welcome39 #ys-home-storybook .ys-ico { width: 20px; height: 20px; flex: 0 0 auto; }

/* Make my book: the print check's warnings (book.ts). */
.ys-print-warn { border-left: 4px solid var(--ys-warn, #6b3200); padding: 4px 12px; margin: 8px 0; }
.ys-print-warn p, .ys-print-warn ul { margin: 4px 0; }

@media (max-width: 600px) {
  .sb-head { padding: 4px 8px; }
  #sb-book .sb-tool { padding: 6px 10px; font-size: .88em; }
  .sb-stage { padding: 6px; }
  .sb-turn { padding: 8px 12px; }
}

/* The carried UI paints every dialog button (with !important): the Story Book keeps its own quiet buttons. */
html body :is(#sb-book, #sb-answer) button:not(.ys-capture-btn) { background-color: var(--ys-paper) !important; color: var(--ys-ink) !important; border-color: var(--ys-line) !important; }
html body :is(#sb-book, #sb-answer) button:not(.ys-capture-btn):hover { background-color: color-mix(in srgb, var(--ys-ink) 8%, var(--ys-paper)) !important; }
html body :is(#sb-book, #sb-answer) button.ys-primary:not(.ys-capture-btn), html body :is(#sb-book, #sb-answer) button.ys-primary:not(.ys-capture-btn):hover { background-color: var(--ys-btn) !important; color: var(--ys-on-btn) !important; border-color: var(--ys-btn) !important; }
html body :is(#sb-book, #sb-answer) button.ys-danger, html body :is(#sb-book, #sb-answer) button.ys-danger:hover { background-color: var(--ys-error, #8b0000) !important; color: #fff !important; border-color: var(--ys-error, #8b0000) !important; }
html body #sb-book button.sb-link:not(:hover), html body #sb-book button.sb-toc-link:not(:hover) { background-color: transparent !important; border-color: transparent !important; }
.sb-list > li.sb-muted { color: var(--ys-ink); font-style: italic; }
.sb-drop-list summary .sb-muted { margin-left: .3em; }