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frontend/app/assets/css/_book.scss
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frontend/app/assets/css/_book.scss
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@use 'mixins' as *;
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// ---------- Reader: an open book of article pages ----------
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// Every article opened in this session is a page, laid out beside the last
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// in a track you move along sideways (ArticleBookStack.vue). Pages are solid
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// paper, and each sticks a spine's width further from the left edge than the
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// one before it — left: calc(var(--i) * var(--spine-w)) — so turning to a
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// newer page slides it over the older ones, which park along the edge with
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// nothing but their spines showing: a stack of pages, titled along the edge
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// like books on a shelf. A page is as wide as its share of the reading
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// surface — minus the spines of every other page, but never more than a
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// comfortable measure, and open across the whole desk when it is the only
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// page in the book — so on a wide desk the next page waits fully in view
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// beside the one you read, not only its spine; on a narrow one the rest wait
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// out at the right edge. A spine the desk has no room for is copied to that
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// edge — the dock, .book-dock below — so no page is ever more than a click
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// away, though its own spine is off the end of the row. Click a spine to turn
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// back to that page, the × to take it out of the book. Below 900px the book
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// folds to the one page in view and its neighbours become chips along the
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// top. Routes stay the source of truth — every page is a plain /wiki/<slug>
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// URL, and useArticleTabs keeps the stack. (The --sidebar-w, --spine-w and
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// --pane-max-w tokens live in _tokens.scss.)
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// the surface the book lies open on
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.book-layer {
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position: fixed;
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inset: 0 0 0 var(--sidebar-w);
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transition: left 0.22s ease;
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z-index: 70;
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display: flex;
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flex-direction: column;
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background: var(--bg-elev);
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box-shadow: -10px 0 26px rgb(5 7 13 / 9%);
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}
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// nothing lives at this URL: the route host says so over the open book
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.reader-note {
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position: fixed;
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inset: 0 0 0 var(--sidebar-w);
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transition: left 0.22s ease;
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z-index: 74;
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background: var(--bg-elev);
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box-shadow: -10px 0 26px rgb(5 7 13 / 4%);
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}
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// the row of pages, moved along sideways
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.book-track {
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--pane-w: calc(100% - (var(--panes, 1) - 1) * var(--spine-w));
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position: relative;
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flex: 1;
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min-height: 0;
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display: flex;
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align-items: stretch;
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overflow-x: auto;
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overflow-y: hidden;
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overscroll-behavior: contain;
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// the desk under the pages: once a page stops short of the reading
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// surface, what's left of the desk shows beside it
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background: var(--bg);
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@include no-scrollbar;
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}
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// one page: solid paper, parked beside the pages under it
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.book-pane {
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position: sticky;
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left: calc(var(--i) * var(--spine-w));
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z-index: calc(var(--i) + 1);
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flex: 0 0 var(--pane-w);
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// A page takes every inch of the reading surface it can — the one in view
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// opens across the whole desk, not just a column of it. Only once so many
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// are open that each page's share falls below a comfortable reading width
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// does it hold at that width and the book scroll sideways instead.
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min-width: min(46rem, 100%);
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// ...and on a desk wide enough for it to stretch past a page of paper, it
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// holds at --pane-max-w and leaves the rest of the desk bare. The single
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// page of a one-page book is exempt below.
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max-width: var(--pane-max-w);
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display: flex;
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background: var(--bg-elev);
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// the fore-edge of the paper, against the desk and the next page
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border-right: 1px solid var(--border);
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// the edge of this page lying on top of the ones beneath it
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box-shadow: -10px 0 22px rgb(5 7 13 / 7%);
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animation: page-turned-in 0.3s cubic-bezier(0.22, 0.8, 0.36, 1) both;
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}
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// a book with a single page in it lies open across the whole desk: there is
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// no other page waiting for that space, so the page takes all of it
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.book-pane:only-child { max-width: none; }
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// a page that isn't in view asks to be turned to: the whole of it is
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// clickable (clicks on its inert body retarget to the pane itself), not
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// just the spine
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.book-pane:not(.active) {
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cursor: pointer;
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.pane-body, .pane-body * { cursor: pointer; }
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}
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// a new page is laid down at the right and eased into the stack
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@keyframes page-turned-in {
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from { transform: translateX(56px); opacity: 0; }
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}
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// the page's fore-edge: its title standing on end, and the × that closes it.
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// Once a newer page is turned over this one, the spine is all that's left in
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// sight — so it is the handle for turning back. A page whose spine is off the
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// edge of the desk has it copied at the edge itself, in the dock below, which
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// borrows .spine-title and .spine-close as its own standing type.
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.pane-spine {
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flex: 0 0 var(--spine-w);
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 6px;
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padding: 6px 0 10px;
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background: var(--surface);
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border-right: 1px solid var(--border);
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color: var(--muted);
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cursor: pointer;
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user-select: none;
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transition: color 0.15s, background-color 0.15s;
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&:hover { color: var(--text); background: var(--surface-2); }
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}
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// the page in view has its spine marked, the way a ribbon marks a book
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.book-pane.active .pane-spine {
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color: var(--accent);
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background: color-mix(in srgb, var(--accent) 10%, var(--surface));
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}
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.spine-close {
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@include icon-target(15px, 5px);
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color: var(--faint);
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transition: color 0.15s, background-color 0.15s;
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@include close-target;
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svg { display: block; }
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}
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.spine-title {
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writing-mode: vertical-rl;
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flex: 1;
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min-height: 0;
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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font-size: 0.78rem;
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font-weight: 700;
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line-height: 1.35;
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letter-spacing: 0.01em;
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padding-top: 0;
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}
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// the page itself: the article, scrolling on its own
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.pane-body {
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flex: 1;
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min-width: 0;
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display: flex;
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flex-direction: column;
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}
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.pane-scroll {
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flex: 1;
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min-height: 0;
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overflow-y: auto;
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overscroll-behavior: contain;
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padding-inline: clamp(16px, 3.5vw, 36px);
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// the article takes the page as a single centered column
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.article-page { max-width: 78ch; margin-inline: auto; }
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}
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.pane-skeleton { padding-top: 32px; }
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// folded up narrow: the neighbours of the page in view, as chips along the
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// top. Wide screens read the spines instead.
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.book-chips {
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display: none;
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flex-shrink: 0;
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gap: 8px;
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padding: 9px 10px;
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overflow-x: auto;
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overscroll-behavior: contain;
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background: var(--surface);
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border-bottom: 1px solid var(--border);
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@include no-scrollbar;
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}
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.book-chip {
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flex-shrink: 0;
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display: flex;
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align-items: center;
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gap: 6px;
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max-width: 46vw;
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padding: 5px 7px 5px 11px;
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border: 1px solid var(--border);
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border-radius: 999px;
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background: var(--surface-2);
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color: var(--muted);
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font-size: 0.79rem;
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font-weight: 600;
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cursor: pointer;
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user-select: none;
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transition: color 0.15s, background-color 0.15s, border-color 0.15s;
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&:hover { color: var(--text); }
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&.active {
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color: var(--accent);
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background: var(--bg-elev);
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border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
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}
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}
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.chip-title {
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min-width: 0;
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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}
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.chip-close { @include icon-target(16px, 5px); color: var(--faint); @include close-target; }
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// ---------- The dock: pages waiting beyond the right edge of the desk -----
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// A page further along the book than the one in view lies somewhere off the
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// right edge of the desk, reachable by dragging the row sideways. While it is
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// out there, its spine is kept at the edge itself: a stack one spine wide, in
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// the order the pages were opened, each one the standing title and × of the
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// page it stands for. Click it and the book turns to that page as though you
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// had scrolled to it; the page's own spine comes into view and its copy in the
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// dock goes away (ArticleBookStack measures which pages are out there). It
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// rides above every page of the book — the pages are numbered one apiece by
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// --panes — and, being inside the reading surface, below anything popped over
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// it.
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.book-dock {
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position: absolute;
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inset-block: 0;
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right: 0;
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z-index: calc(var(--panes, 1) + 2);
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display: flex;
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flex-direction: column;
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width: var(--spine-w);
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padding: 6px 0;
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background: var(--surface);
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border-left: 1px solid var(--border);
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box-shadow: -10px 0 22px rgb(5 7 13 / 7%);
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color: var(--muted);
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}
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// the waiting spines share the height of the desk, so however many pages are
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// out there every one of them keeps a place at the edge, its title cut short
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// to fit — the whole title is in the tooltip
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.dock-spine {
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flex: 1 1 0;
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min-height: 0;
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 6px;
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padding: 4px 0;
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cursor: pointer;
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user-select: none;
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transition: color 0.15s, background-color 0.15s;
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+ .dock-spine { border-top: 1px solid var(--border); }
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&:hover { color: var(--text); background: var(--surface-2); }
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}
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@media (max-width: 900px) {
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.book-layer, .reader-note { inset: 0; box-shadow: none; }
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.book-track { overflow-x: hidden; }
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// folded: only the page in view is out, the rest are chips along the top
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.book-pane {
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position: static;
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flex: 1 1 100%;
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width: 100%;
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min-width: 0;
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max-width: 100%;
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box-shadow: none;
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&:not(.active) { display: none; }
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}
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.book-chips { display: flex; }
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// folded, the book has no edges to stack spines against: the chips along
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// the top are every page of it
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.book-dock { display: none; }
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.pane-scroll { padding-inline: 16px; }
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}
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@media (prefers-reduced-motion: reduce) {
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.book-pane { animation: none; }
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}
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