/* Merge PDF + Alternate & Mix.

   The workspace is a page canvas: the upload box gives way to it, a toolbar
   sits on top (view toggle, thumbnail size, add/reorder), the pages are shown
   as bare thumbnails with the file name above them, and each one carries its
   own tools. The action bar stays at the bottom of the screen. */

/* The workspace IS the page here, the way their merge screen is: the canvas, the
   toolbar and the action band use the width of the window instead of the 860px
   reading column. The client's words: "they have lot of working place. but we
   dont". The compound selector is needed because theme.css is loaded last and
   sets .tool-page { max-width: 860px }. */
.tool-page.files-page {
  --files-gutter: var(--tool-gutter, clamp(16px, 2vw, 30px));
  max-width: none;
}

.files-work { margin-top: 22px; }

/* Toolbar pieces that belong to one tool only are hidden with [hidden], which
   display:flex/inline-flex would otherwise win against. */
.files-tools [hidden],
.files-menu-wrap[hidden],
.files-only-organize[hidden],
.files-only-alt[hidden],
.files-hint[hidden] { display: none !important; }

/* Their hero is centred over the workspace, so this tool's heading is too. */
.files-head { text-align: center; align-items: center; }
/* Extract Images uses a left-aligned heading, so the heading brings the same
   gutter as the canvas it sits over. */
.tool-page.files-page > .tool-head { padding-inline: var(--files-gutter, 20px); }
.files-head h1 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
.files-head .lead { max-width: 620px; margin-left: auto; margin-right: auto; }

/* ---- toolbar ------------------------------------------------------------- */
/* Toggle over the middle of the canvas, zoom at the right edge — the two places
   their toolbar puts them. */
.files-toolbar {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  gap: 16px; padding: 0 var(--files-gutter, 20px) 14px;
  border-bottom: 1px solid var(--line);
}
.files-views {
  grid-column: 2; justify-self: center;
  display: inline-flex; background: var(--white); border: 1px solid var(--line);
  border-radius: 4px; padding: 1px; gap: 0;
}
.files-view-btn {
  border: 1px solid transparent; background: none; font: inherit; font-size: .92rem; cursor: pointer;
  padding: 8px 16px; border-radius: 4px; color: var(--ink);
}
/* Their toggle's chosen half carries the accent border — Files view is the
   one their screen opens on. */
.files-view-btn.is-on {
  background: var(--white); color: var(--ink); border-color: var(--accent);
}
.files-zoom {
  grid-column: 3; justify-self: end; margin-left: 0;
  display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: .95rem;
}
.files-zoom input[type=range] { width: clamp(110px, 22vw, 190px); accent-color: var(--accent); }
.files-zoom .la { font-size: .9em; }
.files-zoom-value { font-size: .78rem; color: var(--muted); min-width: 26px; text-align: right; }

/* Second row: the tool group, centred under the toggle row. */
.files-tools {
  display: inline-flex; align-items: stretch; margin: 14px auto 0;
  border: 1px solid var(--line); border-radius: 4px; background: var(--white);
  overflow: visible; position: relative;
}
.files-toolbar + .files-tools { display: flex; width: fit-content; }
.files-tool {
  display: inline-flex; align-items: center; gap: 7px;
  border: none; background: none; font: inherit; font-size: .87rem; cursor: pointer;
  padding: 9px 16px; color: var(--ink); border-right: 1px solid var(--line);
  white-space: nowrap;
}
.files-tool .la { color: var(--muted); font-size: .95em; }
.files-tool:hover .la { color: var(--accent-dark); }
.files-tools > *:last-child .files-tool,
.files-tools > .files-tool:last-child { border-right: none; }
.files-tool:hover { background: var(--accent-soft); color: var(--accent-dark); }
.files-menu-wrap { position: relative; display: inline-flex; }
.files-menu {
  position: absolute; left: 0; top: calc(100% + 6px); z-index: 60; min-width: 236px;
  background: var(--white); border: 1px solid var(--line); border-radius: 10px;
  box-shadow: var(--shadow); padding: 6px; display: grid; gap: 2px;
}
.files-menu button {
  text-align: left; border: none; background: none; font: inherit; font-size: .88rem;
  padding: 9px 11px; border-radius: 7px; cursor: pointer; color: var(--ink);
  display: flex; align-items: center; gap: 10px;
}
.files-menu button:hover { background: var(--accent-soft); color: var(--accent-dark); }
/* The mark beside each source, so the list reads at a glance the way theirs
   does: a folder, the three provider logos, a page, a blank page. */
.files-menu button i {
  font-size: 1.05rem; width: 1.2em; text-align: center; flex: none; color: var(--muted);
}
.files-menu button:hover i { color: var(--accent-dark); }
.files-menu button.is-cloud i { color: var(--accent); }
.files-menu button span.menu-label { flex: 1 1 auto; }
.files-menu-empty { padding: 9px 11px; font-size: .85rem; color: var(--muted); }

/* The ⊕ instant menu: "Add Files" / "Add Pages" rows, each unfolding its
   source list beside the popup — Sejda's mark menu. Whatever is picked there
   lands at the marked spot. */
.files-mark-menu { position: fixed; }
.mark-row { position: relative; }
.mark-row .mark-head { display: flex; align-items: center; gap: 10px; width: 100%; }
.mark-row .mark-head .mark-chev { margin-left: auto; flex: none; width: auto;
  font-size: .7rem; color: var(--muted); }
.mark-row .mark-sub { display: none; position: absolute; left: calc(100% + 6px); top: -6px; z-index: 61;
  max-height: calc(100vh - 16px); overflow-y: auto; }
.mark-row:hover > .mark-sub,
.mark-row.is-open > .mark-sub { display: grid; }
/* The "Drag to move" buttons are real handles: grab them and the card or the
   page follows the pointer. */
.fx-tool.is-drag-handle { cursor: grab; }
.fx-tool.is-drag-handle:active { cursor: grabbing; }

/* ---- the canvas: a full-width grey band with the pages centred in it ---- */
.files-grid,
.files-pages-grid {
  display: grid; gap: 26px 30px;
  /* The band runs edge to edge, the way their workspace does, and the pages now
     fill it — the window is the workspace, not the reading column. */
  width: 100%; margin-left: 0;
  padding: 30px var(--files-gutter, 20px);
  background: var(--bg);
  grid-template-columns: repeat(auto-fit, var(--files-thumb, 150px));
  justify-content: center; align-content: start;
}
/* Files view wraps exactly as theirs does: the files stay the size the slider
   asks for and the row fills up, the next file starting a new line rather than
   the files being squeezed to keep one line. Their words: "why our 5 pdf will
   stay togther — make it like sajde". Alternate & Mix keeps its own vertical
   list via .files-rows, and Pages view uses the same wrapping template. */
.files-grid:empty { display: none; }
.files-pages { margin-top: 0; }

/* Pages view: the pages CENTRE in the band, the way Sejda's do. A grid could
   not do it — the per-file heading spans every column (`grid-column: 1 / -1`),
   and one item touching all the auto-fit tracks keeps every empty track alive,
   so the "centred" tracks still started at the gutter (the client: "page view
   gone left, it should be centre the pages"). A wrapping flex line has no
   tracks to strand: whatever fits goes in the row, and the row centres. */
.files-pages-grid {
  display: flex; flex-wrap: wrap; align-content: flex-start;
}
.files-pages-grid > .fx-cell { flex: 0 0 var(--files-thumb, 150px); }
/* The document heading gets a line to itself, as it did when it spanned. */
.files-pages-grid > .fx-file-chip { flex: 0 0 100%; }

/* One page (or one file) as it appears in the canvas: the picture, its name,
   and the tools that fade in when you point at it. */
.fx-item,
.fx-cell {
  position: relative; text-align: center; background: none; border: none;
  padding: 0; font: inherit; cursor: pointer; min-width: 0;
  user-select: none;            /* pointer-dragging a page must not select its label */
}
/* File card header: name on the left, page chip on the right, above the picture
   and always on screen, whatever the zoom. */
.fx-head {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  margin-bottom: 6px; min-height: 17px; text-align: left;
}
.fx-name,
.fx-label {
  font-size: .78rem; color: var(--muted); font-weight: 500; letter-spacing: .01em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%;
}
.fx-head .fx-name { color: var(--ink, #1b2430); font-weight: 600; }
.fx-thumb {
  position: relative;          /* anchors the page-count badge */
  display: block; background: var(--white); border: 1px solid var(--line);
  box-shadow: 0 1px 3px rgba(20, 30, 35, .12); overflow: hidden;
  transition: box-shadow .12s, border-color .12s;
}
.fx-item:hover .fx-thumb,
.fx-cell:hover .fx-thumb { box-shadow: var(--shadow); border-color: var(--line-strong); }
/* The page fills the item width, so its shape is the page's shape. */
.fx-thumb canvas, .fx-thumb img { display: block; width: 100%; height: auto; }
.fx-thumb.fx-empty { background: var(--red-bg, #fbeceb); border-color: var(--red-line); }
/* "6 pages" on the picture: the count stays readable at any zoom. */
.fx-badge {
  position: absolute; right: 6px; bottom: 6px; z-index: 2;
  background: rgba(17, 24, 32, .72); color: #fff;
  font-size: 11px; line-height: 1; padding: 4px 7px; border-radius: 10px;
  pointer-events: none;
}
/* "6 pages" on the picture: the count stays readable at any zoom. */
.fx-badge {
  position: absolute; right: 6px; bottom: 6px; z-index: 2;
  background: rgba(17, 24, 32, .72); color: #fff;
  font-size: 11px; line-height: 1; padding: 4px 7px; border-radius: 10px;
  pointer-events: none;
}
.fx-ph {
  display: flex; align-items: center; justify-content: center;
  min-height: calc(var(--files-thumb, 150px) * 1.3);
  font-size: .78rem; color: var(--muted);
}

.fx-pages {
  display: inline-block; margin-top: 0; border: none; background: none;
  color: var(--muted); border-radius: 999px; padding: 3px 9px;
  font: inherit; font-size: .7rem; cursor: pointer; text-decoration: underline;
  text-decoration-color: var(--line-strong); text-underline-offset: 3px;
  white-space: nowrap; flex: 0 0 auto;
}
/* In a page cell the chip is still its own row under the thumbnail; on a file
   card it rides in the header. */
.fx-cell > .fx-pages { margin-top: 8px; }
.fx-pages:hover { color: var(--accent-dark); }
.fx-pages.is-picked {
  background: var(--accent-soft); border-color: var(--accent-line);
  color: var(--accent-dark); font-weight: 600;
}

/* The tools sit over the top of the page, the way their hover bar does. */
.fx-tools {
  position: absolute; left: 50%; top: 34px; transform: translateX(-50%);
  display: flex; gap: 2px; padding: 3px; z-index: 5;
  background: rgba(255, 255, 255, .97); border: 1px solid var(--line);
  border-radius: 7px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: opacity .12s;
}
.fx-item:hover .fx-tools,
.fx-item.is-open .fx-tools,
.fx-cell:hover .fx-tools,
.fx-cell.is-open .fx-tools { opacity: 1; pointer-events: auto; }
.fx-tool {
  border: none; background: none; color: var(--muted);
  width: 26px; height: 26px; border-radius: 5px; cursor: pointer; font-size: 13px;
  line-height: 1; display: inline-flex; align-items: center; justify-content: center;
}
.fx-tool:hover { background: var(--accent-soft); color: var(--accent-dark); }
/* No hover to reveal anything on a touch screen, so the tools sit under the
   page instead of floating over it. */
@media (hover: none) {
  .fx-tools {
    position: static; transform: none; opacity: 1; pointer-events: auto;
    justify-content: center; margin-top: 7px; background: none; border: none;
    box-shadow: none; padding: 0;
  }
}

/* ⊕ before and after an item: always there, the way theirs are — a quiet grey
   circle you can aim at, because it is how more pages get in. */
.fx-insert {
  position: absolute; top: calc(50% - 11px); width: 22px; height: 22px; z-index: 4;
  border: 1px solid var(--line-strong); border-radius: 50%; background: var(--white);
  color: var(--muted); font-size: 15px; line-height: 1; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  opacity: .85; transition: opacity .12s, border-color .12s, color .12s, transform .12s;
}
.fx-insert-before { left: -15px; }
.fx-insert-after { right: -15px; }
.fx-insert:hover {
  opacity: 1; transform: scale(1.12); border-color: var(--accent);
  color: var(--accent-dark);
}
/* The ⊕ the visitor aimed at: it stays lit while the Add Pages menu is open, so
   it is obvious where the file, the pages or the blank page will land. */
.fx-insert.is-armed {
  opacity: 1; border-color: var(--accent); color: var(--accent-dark);
  background: var(--accent-soft); box-shadow: 0 0 0 3px var(--accent-soft);
}
/* An item that was just inserted (a blank page, usually): tinted, briefly, and
   scrolled to, because a blank page is invisible in a long document. */
.fx-cell.is-new .fx-thumb {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
  animation: fx-new-flash 1.8s ease-out 1;
}
@keyframes fx-new-flash {
  0% { background: var(--accent-soft); }
  100% { background: var(--white); }
}
.files-menu-sep { height: 1px; margin: 5px 6px; background: var(--line); }
@media (hover: none) { .fx-insert { position: static; margin: 4px auto 0; } }

/* Their toolbar: outlined boxes that wrap, one row per set of tools — and the
   hint line centred over the canvas. */
.files-tools { flex-wrap: wrap; }
.files-tools .files-tool {
  border: 1px solid var(--accent-line); background: var(--white);
  color: var(--accent); border-radius: 4px; font-weight: 600;
}
.files-tools .files-tool:hover { border-color: var(--accent); background: var(--accent-soft); }
.files-hint { text-align: center; }

.fx-item.dragging, .fx-cell.dragging { opacity: .4; }
.fx-item.drop-target .fx-thumb,
.fx-cell.drop-target .fx-thumb { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* The pointer drag on page cells (see startPageDrag): the held page fades, a
   ghost of it follows the pointer, and a green bar shows where it will land. */
.fx-cell.is-moving, .fx-item.is-moving { opacity: .35; }
.pdrag-ghost {
  position: fixed; z-index: 90; pointer-events: none; background: var(--white);
  border: 1px solid var(--line-strong); border-radius: 6px; padding: 2px;
  box-shadow: 0 12px 28px rgba(20, 30, 35, .28); transform: rotate(1.6deg);
}
.pdrag-ghost .fx-tools, .pdrag-ghost .fx-insert, .pdrag-ghost .fx-tick { display: none; }
.fx-cell.pdrag-before::after,
.fx-cell.pdrag-after::after,
.fx-item.pdrag-before::after,
.fx-item.pdrag-after::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 3px;
  border-radius: 2px; background: var(--accent); z-index: 7;
}
.fx-cell.pdrag-before::after,
.fx-item.pdrag-before::after { left: -16px; }
.fx-cell.pdrag-after::after,
.fx-item.pdrag-after::after { right: -16px; }

/* A heading row inside the page strip, naming the document the pages below
   belong to. It takes a flex line to itself (see .files-pages-grid). */
.fx-file-chip {
  font-size: .78rem; font-weight: 700; color: var(--accent-dark);
  padding-top: 4px;
}

/* ---- Alternate & Mix: a list of documents, not a page grid -------------- */
.files-grid.files-rows { grid-template-columns: minmax(0, 1fr); gap: 22px; }
.fx-row {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  position: relative;
  background: var(--white); border: 1px solid #ddd; border-radius: 10px;
  padding: 20px; margin: 10px 0;
  /* Their card carries three soft layers, not one. */
  box-shadow: 0 4px 6px rgba(50, 50, 93, .11), 0 1px 3px rgba(0, 0, 0, .08),
              0 -1px 3px rgba(0, 0, 0, .02);
}
.fx-row.dragging { opacity: .5; }
.fx-row.drop-target { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
@media (max-width: 640px) {
  .fx-row { gap: 10px; }
  .fx-row-field { width: 100%; }
  .files-alt-sort { margin-left: 0; }
}
.fx-row-num {
  /* Their number: a small soft chip with plain gray digits, not a bold tile. */
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 24px; padding: 0 3px; border-radius: 4px;
  background: var(--accent-soft); color: #666;
  font-size: 1rem; font-weight: 400; flex: 0 0 auto;
}
.fx-row-name {
  font-weight: 700; font-size: 1.15rem; min-width: 60px; color: var(--accent);
  max-width: calc(100% - 56px); overflow-wrap: anywhere;
}
/* Their faint × waits in the card's top-right corner; the row brings it
   forward on hover. */
.fx-row .fx-tool {
  position: absolute; top: 10px; right: 12px;
  color: var(--ink); font-size: 15px;
  opacity: .22; transition: opacity .12s;
}
.fx-row:hover .fx-tool, .fx-row:focus-within .fx-tool { opacity: 1; }
/* Their Pick-pages pair: two joined 12px boxes; the chosen one has the accent
   border, a faint tint and an INSET shadow (their press-in look). */
.fx-row .seg { border-radius: 4px; }
.fx-row .seg label {
  border: 1px solid #ccc; border-right-width: 0; background: var(--white);
  color: #333; border-radius: 0; padding: 4px 8px; font-size: .75rem;
  font-weight: 400;
}
.fx-row .seg label:first-of-type { border-radius: 4px 0 0 4px; }
.fx-row .seg label:last-of-type { border-right-width: 1px; border-radius: 0 4px 4px 0; }
.fx-row .seg label:has(input:checked) {
  border-color: var(--accent); background: var(--accent-soft); color: #000;
  font-weight: 400; box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
}
.fx-row-field {
  display: inline-flex; align-items: center; gap: 8px; font-size: .95rem;
  color: var(--ink);
}
/* Each question sits on its own line, the way their cards stack. */
.fx-row-field { flex-basis: 100%; }
.fx-row-pick { color: var(--muted); }
.fx-row-step { color: var(--muted); }
/* Their step box: a squat 30px square, no spinner arrows, centered digit. */
.fx-step {
  width: 40px; height: 30px; font: inherit; font-size: 1rem; padding: 2px 6px;
  text-align: center; -webkit-appearance: none; appearance: textfield;
  border: 1px solid #ccc; border-radius: 4px; background: var(--white);
  color: #555;
}
.fx-step::-webkit-outer-spin-button,
.fx-step::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.seg-sm label { padding: 4px 8px; font-size: .75rem; }

/* Their screen has no view toggle and no zoom row, and the heading is
   centred over the cards. */
.files-page[data-tool="alternate-mix-pdf"] .files-toolbar { display: none; }
.files-page[data-tool="alternate-mix-pdf"] .files-head { text-align: center; }
.files-page[data-tool="alternate-mix-pdf"] .files-head .pill { display: none; }
.files-page[data-tool="alternate-mix-pdf"] .files-head .lead { margin-inline: auto; }
.files-page[data-tool="alternate-mix-pdf"] .files-head h1 {
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
}
/* Alternate & Mix: their layout is two columns — the document list on the
   left, and on the right a rail with "Add more files ▾" and the sort links. */
.files-canvas-row { display: flex; align-items: flex-start; gap: 28px; }
.files-canvas-row > .files-grid { flex: 1 1 auto; min-width: 0; }
.files-alt-bar {
  flex: 0 0 230px; display: flex; flex-direction: column;
  align-items: flex-start; gap: 10px; margin-top: 50px;
  padding-inline: 0;
}
.files-alt-add {
  /* Their rail's "Add more files": a soft accent button with a copy mark,
     40px tall like theirs. The caret beside it opens the sources. */
  display: inline-flex; align-items: center; gap: 2px;
  border: 1px solid transparent; background: var(--accent-soft);
  color: var(--accent-dark); font: inherit; font-size: 1rem; font-weight: 400;
  padding: 7px 14px; border-radius: 4px; cursor: pointer;
}
.files-alt-add:hover { border-color: var(--accent); }
.files-alt-add i { margin-right: 8px; }
.files-alt-group { display: inline-flex; align-items: stretch; }
.files-alt-group .files-alt-add { border-radius: 4px 0 0 4px; border-right: 0; }
.files-alt-caret {
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid transparent; background: var(--accent-soft);
  color: var(--accent-dark); border-radius: 0 4px 4px 0; padding: 7px 9px;
  font: inherit; font-size: .9rem; line-height: 1; cursor: pointer;
}
.files-alt-add:hover + .files-alt-caret,
.files-alt-caret:hover { border-color: var(--accent); }
.files-alt-sort { display: flex; gap: 14px; }
.files-alt-sort .files-link { white-space: nowrap; }
@media (max-width: 900px) {
  .files-alt-bar { flex-basis: 200px; }
}
.files-link {
  border: none; background: none; font: inherit; font-size: 1rem; cursor: pointer;
  color: var(--accent-dark);
  padding: 4px 0;
}
.files-link:hover { text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 760px) {
  .files-canvas-row { flex-direction: column; gap: 14px; }
  .files-alt-bar { flex-direction: row; align-items: center; flex-wrap: wrap; gap: 14px; }
  .files-alt-sort { margin-left: auto; }
}

/* ---- Organize: picked pages, and the hint above the canvas -------------- */
.files-hint { margin: 10px 0 0; padding-inline: var(--files-gutter, 20px); }
.fx-cell.is-sel .fx-thumb {
  border-color: var(--sel, var(--accent)); box-shadow: 0 0 0 3px rgba(31, 122, 109, .18);
}
.fx-tick {
  position: absolute; right: 6px; top: 26px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--sel, var(--accent)); color: #fff; font-size: 12px; line-height: 22px;
  text-align: center; opacity: 0; transform: scale(.7); transition: opacity .12s, transform .12s;
  z-index: 6;
}
.fx-cell.is-sel .fx-tick { opacity: 1; transform: scale(1); }
.fx-cell.is-blank .fx-thumb {
  background: repeating-linear-gradient(45deg, #f7f9f9, #f7f9f9 8px, #eef2f2 8px, #eef2f2 16px);
}
.fx-cell.is-blank .fx-ph { color: var(--muted); font-size: .76rem; }

/* Dropping more files anywhere on the workspace. */
.files-page.is-dropping .files-work,
.files-page.is-dropping .files-toolbar { outline: 2px dashed var(--accent-line); outline-offset: 6px; }

/* ---- options: segmented groups ------------------------------------------- */
/* Options stay a readable card in the middle of the wider workspace. */
/* Their options live on the amber band: one centred column — sections
   stacked, each row centred — and the action bar beneath carries no seam. */
.files-options {
  margin: 0; width: 100%; padding: 20px var(--files-gutter, 20px) 8px;
  background: var(--amber-bg); border: 0; border-radius: 0;
  display: grid; gap: 22px; text-align: center;
}
.files-page:has(.files-options:not([hidden])) .files-bar { border-top-color: transparent; }
.opt-group { border: 0; margin: 0; padding: 0; min-width: 0; }
.opt-group legend { font-size: 1.0625rem; font-weight: 700; color: var(--ink); padding: 0 0 10px; text-align: center; }
.opt-group .check {
  display: flex; align-items: center; gap: 8px; justify-content: center;
  font-weight: 400; font-size: 1rem; color: var(--ink); margin-bottom: 10px;
}
.opt-group .check .la { color: var(--muted); font-size: 1.02em; cursor: help; }
.opt-group input[type=checkbox] { accent-color: var(--accent); width: 15px; height: 15px; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label {
  position: relative; display: inline-flex; align-items: center; font-size: .84rem;
  cursor: pointer; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px;
  background: var(--white); color: var(--muted);
}
.seg label:has(input:checked) {
  border-color: var(--accent); background: var(--accent-soft);
  color: var(--accent-dark); font-weight: 600;
}
.seg input { position: absolute; opacity: 0; width: 0; height: 0; }
/* The options' pill rows are Sejda's: joined 12px boxes; the chosen one has
   the accent border, a faint tint and their press-in shadow. */
.files-options .seg { gap: 0; justify-content: center; margin-top: 2px; }
.files-options .seg label {
  border: 1px solid #ccc; border-right-width: 0; border-radius: 0;
  background: var(--white); color: #333; font-weight: 400; font-size: .75rem;
  padding: 4px 8px;
}
.files-options .seg label:first-of-type { border-radius: 4px 0 0 4px; }
.files-options .seg label:last-of-type { border-right-width: 1px; border-radius: 0 4px 4px 0; }
.files-options .seg label:has(input:checked) {
  border-color: var(--accent); background: var(--accent-soft); color: #000;
  box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125); font-weight: 400;
}
@media (min-width: 860px) {
  .files-options { gap: 24px; }
}

/* ---- the action band: full width, button centred -------------------------*/
.files-bar {
  position: sticky; bottom: 0; z-index: 30; margin-top: 0;
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 14px;
  width: 100%; margin-left: 0;
  padding: 16px var(--files-gutter, 20px);
  background: var(--amber-bg); border-top: 1px solid var(--amber-line);
}
.files-bar-actions { display: flex; align-items: center; gap: 12px; }
/* Their "More options": a soft accent chip beside the big merge button. */
.files-bar #files-more {
  background: var(--accent-soft); border-color: transparent; color: var(--accent);
  border-radius: 4px; font-size: .9rem; padding: 10px 18px;
}
.files-bar #files-more:hover { border-color: var(--accent); color: var(--accent-dark); }
.files-bar .btn.is-on { background: rgba(255, 255, 255, .7); border-color: var(--amber-line); }
.files-bar-count {
  position: absolute; left: var(--files-gutter, 20px);
  font-size: .82rem; color: var(--amber-ink);
}
/* Their Alternate & Mix band: one centred button, no count. */
.files-bar-alt .files-bar-count { display: none; }
@media (max-width: 900px) {
  .files-bar { justify-content: center; }
  .files-bar-count { position: static; order: 2; width: 100%; text-align: center; }
  .files-bar-actions { order: 1; }
}

/* ---- the page popup ------------------------------------------------------ */
.files-modal-box { width: min(1040px, 96vw); padding: 0; display: flex; flex-direction: column; }
.files-modal-head {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.fm-name { font-size: .95rem; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.files-modal-actions { display: flex; gap: 8px; margin-left: auto; }
.files-modal-body {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 14px; background: var(--canvas); min-height: 240px;
}
.files-modal-body canvas { background: var(--white); box-shadow: var(--shadow-sm); max-width: 100%; }
.fm-nav {
  border: 1px solid var(--line-strong); background: var(--white); color: var(--ink);
  width: 42px; height: 42px; border-radius: 50%; font-size: 22px; line-height: 1;
  cursor: pointer; flex: 0 0 auto;
}
.fm-nav:disabled { opacity: .35; cursor: default; }
.fm-grid-wrap { padding: 14px; overflow-y: auto; max-height: 62vh; background: var(--bg); }
.fm-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(108px, 1fr)); }
.fm-cell {
  position: relative; border: 2px solid var(--line); background: var(--white);
  border-radius: 8px; padding: 6px; cursor: pointer; font: inherit;
}
.fm-cell-thumb {
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 1 / 1.35; background: var(--bg); border-radius: 5px; overflow: hidden;
}
.fm-cell-thumb canvas { display: block; }
.fm-cell-num { display: block; text-align: center; font-size: .74rem; color: var(--muted); margin-top: 4px; }
.fm-cell-tick {
  position: absolute; right: 6px; top: 6px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 13px; line-height: 22px; text-align: center;
  opacity: 0; transform: scale(.7); transition: opacity .12s, transform .12s;
}
.fm-cell.picked { border-color: var(--accent); }
.fm-cell.picked .fm-cell-tick { opacity: 1; transform: scale(1); }
.fm-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; border-top: 1px solid var(--line); flex-wrap: wrap;
}
.fm-bar-actions { display: flex; gap: 8px; margin-left: auto; }

/* ---- phone --------------------------------------------------------------- */
@media (max-width: 640px) {
  /* One column on a phone: toggle over zoom, both centred. */
  .files-toolbar { grid-template-columns: 1fr; justify-items: center; gap: 10px; }
  .files-views, .files-zoom { grid-column: 1; justify-self: center; }
  .files-zoom input[type=range] { width: 110px; }
  /* Seven tools have to wrap on a phone instead of running off the side. */
  .files-tools { width: 100%; flex-wrap: wrap; border-radius: 8px; }
  .files-tool, .files-menu-wrap { flex: 1 1 auto; }
  .files-menu-wrap .files-tool { width: 100%; justify-content: center; }
  .files-menu { left: 0; right: auto; min-width: 210px; }
  .files-grid, .files-pages-grid { gap: 14px 10px; }
  /* Zoomed in on a phone a full-size card would run off the side, so there the
     columns are allowed to shrink below the size the slider asks for. */
  .files-grid, .files-pages-grid {
    grid-template-columns: repeat(auto-fit, minmax(0, var(--files-thumb, 150px)));
  }
  .files-pages-grid > .fx-cell { flex-shrink: 1; }
  .files-options { padding: 12px; }
  .files-bar { padding: 10px 12px; }
  .files-bar-actions { width: 100%; }
  .files-bar-actions .btn { flex: 1 1 auto; justify-content: center; }
  .files-modal-box { width: 96vw; }
  .files-modal-body { padding: 10px 6px; }
  .fm-nav { width: 36px; height: 36px; font-size: 19px; }
  .fm-grid { grid-template-columns: repeat(auto-fill, minmax(86px, 1fr)); gap: 9px; }
  .fm-bar { position: sticky; bottom: 0; background: var(--white); }
  .fm-bar-actions { width: 100%; }
  .fm-bar-actions .btn { flex: 1 1 auto; justify-content: center; }
  .files-modal-head { flex-wrap: wrap; }
  .files-modal-actions { margin-left: 0; width: 100%; }
  .files-modal-actions .btn { flex: 1 1 auto; justify-content: center; }
}