:root { color-scheme: dark; --accent: #4d8bff; }
* { box-sizing: border-box; }
.hidden { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #525659;
  color: #eee;
  display: flex;
  flex-direction: column;
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: #323639;
  border-bottom: 1px solid #1c1f21;
  flex: 0 0 auto;
}
.brand { color: var(--accent); font-size: 16px; }
.phase { color: #9aa0a6; font-size: 12px; }
.sep { width: 1px; height: 22px; background: #4a4f52; margin: 0 4px; }
.spacer { flex: 1; }
.status, .pageind, .searchcount, .zoom { color: #9aa0a6; font-size: 12px; }
.zoom { min-width: 44px; text-align: center; }
.searchcount { min-width: 60px; text-align: center; }
.pageof { color: #9aa0a6; font-size: 12px; }
.pagenum {
  width: 42px; text-align: center; background: #1f2224; color: #eee;
  border: 1px solid #4a4f52; border-radius: 6px; padding: 4px 4px; font-size: 13px;
}
.searchopt {
  display: flex; align-items: center; gap: 3px; color: #9aa0a6; font-size: 12px;
  cursor: pointer; user-select: none;
}
button {
  background: #4a4f52;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 4px 9px;
  cursor: pointer;
  font-size: 13px;
}
button:hover { background: #595f63; }
button:disabled { opacity: .4; cursor: default; }
#copyPage { background: var(--accent); }
#organizeModeBtn.active { background: var(--accent); }
select.zoom {
  background: #1f2224; color: #eee; border: 1px solid #4a4f52;
  border-radius: 6px; padding: 4px 4px; font-size: 13px; min-width: 64px;
}
input[type="search"] {
  background: #1f2224;
  color: #eee;
  border: 1px solid #4a4f52;
  border-radius: 6px;
  padding: 4px 8px;
  width: 220px;
}

/* Annotation toolbar */
.annobar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: #2b2f31;
  border-bottom: 1px solid #1c1f21;
  flex: 0 0 auto;
}
.annolabel { color: #9aa0a6; font-size: 12px; display: flex; align-items: center; gap: 4px; }
.atool { background: #3a3f42; }
.atool.active { background: var(--accent); box-shadow: 0 0 0 2px rgba(77,139,255,.4); }
#saveAnnots { background: #2e7d32; }
#saveAnnots:disabled { background: #555; }
#annotColor { width: 28px; height: 22px; padding: 0; border: none; background: none; cursor: pointer; }

/* Body layout */
.body { flex: 1; display: flex; min-height: 0; }

/* Khi đang chọn công cụ chú thích: tắt chọn text, đổi con trỏ */
body.tool-active .textlayer { pointer-events: none; }
body.tool-active .page-slot { cursor: crosshair; }
/* Highlight/Underline/Strikeout: NGƯỢC LẠI — bám theo text đã CHỌN (như Foxit),
   nên phải giữ textlayer bắt được chuột để chọn text bình thường. */
body.tool-mark .textlayer { pointer-events: auto; }
body.tool-mark .page-slot { cursor: text; }

/* Lớp annotation (preview trước khi lưu) */
.annotlayer { position: absolute; inset: 0; pointer-events: none; }
.annotlayer .a-hl { position: absolute; background: rgba(255,230,0,.4); }
.annotlayer .a-box { position: absolute; border: 1.5px solid; }
.annotlayer .a-line { position: absolute; height: 0; border-top: 2px solid; }
.annotlayer .a-text {
  position: absolute; border: 1px dashed; padding: 2px 4px;
  font-size: 12px; color: #111; background: rgba(255,255,255,.6); overflow: hidden;
}
.annotlayer .a-note {
  position: absolute; width: 18px; height: 18px; pointer-events: auto;
  background: #ffd400; border: 1px solid #b59000; border-radius: 3px;
  font-size: 12px; text-align: center; line-height: 18px; cursor: help;
}

/* Annotation: chọn & xoá */
.a-sel { pointer-events: auto; cursor: pointer; }
body.tool-active .annotlayer * { pointer-events: none; }
.annotlayer .selected { outline: 2px solid #4d8bff; outline-offset: 1px; }
.annotlayer .a-del {
  position: absolute; right: -10px; top: -10px; width: 18px; height: 18px;
  background: #e53935; color: #fff; border-radius: 50%; font-size: 11px;
  line-height: 18px; text-align: center; cursor: pointer; pointer-events: auto;
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
}
.annotlayer .a-line { min-height: 4px; }

/* Text box editor tại chỗ */
.a-editor {
  position: absolute; pointer-events: auto; background: rgba(255,255,255,.9);
  border: 1px solid #4d8bff; outline: none; padding: 2px 4px; line-height: 1.25;
  white-space: pre-wrap; word-break: break-word; box-shadow: 0 2px 10px rgba(0,0,0,.3);
}

/* Thanh định dạng nổi */
.fmtbar {
  position: fixed; z-index: 50; display: flex; gap: 3px; align-items: center;
  background: #2b2f31; border: 1px solid #1c1f21; border-radius: 7px;
  padding: 4px 6px; box-shadow: 0 4px 16px rgba(0,0,0,.5);
}
.fmtbar select { background: #1f2224; color: #eee; border: 1px solid #4a4f52; border-radius: 4px; padding: 2px; }
.fmtbtn {
  width: 26px; height: 24px; background: #3a3f42; color: #fff; border: none;
  border-radius: 4px; cursor: pointer; font-weight: bold; padding: 0;
  display: inline-flex; align-items: center; justify-content: center; gap: 2px;
}
.fmtbtn.on { background: var(--accent); }
.fmtbtn .sw, .citem .csw, #annotSw, .np-color .sw, .fmt-color .sw {
  display: inline-block; width: 12px; height: 12px; border-radius: 2px;
  border: 1px solid rgba(255,255,255,.5); vertical-align: middle;
}
#annotSw { width: 14px; height: 14px; }

/* Note popup */
.notepop {
  position: fixed; z-index: 50; width: 230px; background: #fffbea; color: #222;
  border: 1px solid #c9b400; border-radius: 6px; box-shadow: 0 6px 20px rgba(0,0,0,.4);
}
.np-head { display: flex; justify-content: space-between; align-items: center;
  background: #ffe600; padding: 4px 8px; font-size: 12px; font-weight: bold; border-radius: 6px 6px 0 0; }
.np-close { cursor: pointer; }
.np-text { width: 100%; min-height: 90px; border: none; outline: none; resize: vertical;
  padding: 8px; background: transparent; color: #222; font-family: inherit; font-size: 13px; box-sizing: border-box; }
.np-foot { display: flex; justify-content: space-between; padding: 6px 8px; border-top: 1px solid #e0d480; }
.np-foot button { background: #eee; color: #333; font-size: 12px; }
.np-del { color: #c62828 !important; }

/* Color popover */
.colorpop {
  position: fixed; z-index: 60; background: #2b2f31; border: 1px solid #1c1f21;
  border-radius: 7px; padding: 8px; box-shadow: 0 6px 20px rgba(0,0,0,.5);
}
.cgrid { display: grid; grid-template-columns: repeat(6, 20px); gap: 5px; }
.cs { width: 20px; height: 20px; border-radius: 4px; cursor: pointer; border: 2px solid transparent; }
.cs:hover { border-color: #fff; }
.cs.cur { border-color: #4d8bff; }
.clbl { color: #9aa0a6; font-size: 11px; margin: 8px 0 4px; }
.ccustom { display: block; margin-top: 8px; color: #ccc; font-size: 12px; cursor: pointer; }
.ccustom input { vertical-align: middle; margin-left: 4px; }

/* Comments panel */
.comments .citem {
  padding: 6px; border-radius: 5px; cursor: pointer; font-size: 12px;
  border: 1px solid #3a3f42; margin-bottom: 6px;
}
.comments .citem:hover { background: #3a3f42; }
.comments .citem .ckind { color: var(--accent); font-weight: bold; }
.comments .citem .cdel { float: right; color: #e57373; cursor: pointer; }
.comments .empty { color: #777; font-size: 12px; }

/* Sidebar */
.sidebar {
  width: 220px;
  flex: 0 0 220px;
  background: #2b2f31;
  border-right: 1px solid #1c1f21;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.tabs { display: flex; flex: 0 0 auto; }
.tab {
  flex: 1;
  border-radius: 0;
  background: #2b2f31;
  color: #9aa0a6;
  padding: 8px;
}
.tab.active { color: #fff; box-shadow: inset 0 -2px 0 var(--accent); }
.panel { flex: 1; overflow: auto; padding: 8px; }
.panel.hidden { display: none; }

/* Thumbnails */
.thumbs { display: flex; flex-direction: column; gap: 10px; align-items: center; }
.thumb { cursor: pointer; text-align: center; width: 100%; }
.thumb img {
  width: 130px;
  background: #fff;
  border: 2px solid transparent;
  box-shadow: 0 1px 6px rgba(0,0,0,.5);
}
.thumb.active img { border-color: var(--accent); }
.thumb .n { font-size: 11px; color: #9aa0a6; margin-top: 2px; }

/* Outline */
.outline .oitem {
  padding: 5px 6px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 13px;
  color: #d6d9dc;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.outline .oitem:hover { background: #3a3f42; }

/* Viewer */
.viewport { flex: 1; overflow: auto; min-height: 0; }
.pages {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 20px;
}
.page-slot {
  position: relative;
  background: #fff;
  box-shadow: 0 4px 18px rgba(0,0,0,.5);
  flex: 0 0 auto;
}
.page-slot img { display: block; width: 100%; height: 100%; }
.page-slot .ph {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: #888; font-size: 13px;
}
.overlay { position: absolute; inset: 0; pointer-events: none; }

/* Text layer: span trong suốt phủ lên ảnh để chọn & copy text */
.textlayer { position: absolute; inset: 0; overflow: hidden; }
.textlayer span {
  position: absolute;
  color: transparent;
  white-space: pre;
  overflow: hidden;
  cursor: text;
  transform-origin: 0 0;
}
.textlayer span::selection { background: rgba(77, 139, 255, .45); }
.page-slot img { user-select: none; -webkit-user-drag: none; }
.hl {
  position: absolute;
  background: rgba(255, 214, 0, .38);
  outline: 1px solid rgba(255, 184, 0, .9);
}
.hl.current { background: rgba(255, 138, 0, .55); }

/* ===== Phase 3: Tổ chức trang ===== */
.organizebar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: #2b2f31;
  border-bottom: 1px solid #1c1f21;
  flex: 0 0 auto;
}
#orgSave { background: #2e7d32; }
#orgSave:disabled { background: #555; }

.organize-grid {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 18px;
  padding: 24px;
  background: #3a3e41;
}
.org-card {
  width: 160px;
  text-align: center;
  cursor: pointer;
  user-select: none;
  border: 2px solid transparent;
  border-radius: 6px;
  padding: 6px;
  background: #2b2f31;
}
.org-card.selected { border-color: var(--accent); background: #2f3a4d; }
.org-card.drag-over { outline: 3px dashed var(--accent); }
.org-card .org-thumb-wrap {
  position: relative;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.5);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  min-height: 60px;
}
.org-card img { display: block; width: 100%; transition: transform .15s; }
.org-card .org-n { font-size: 12px; color: #ccc; margin-top: 4px; }
.org-card .org-crop-mark {
  position: absolute; inset: 10%; border: 1.5px dashed #e53935; pointer-events: none;
}

/* Modal dialog dùng chung cho Insert/Extract/Replace/Crop/Merge/Split/Watermark/Header-Footer */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal-box {
  background: #2b2f31; border-radius: 8px; padding: 16px 20px;
  min-width: 340px; max-width: 560px; max-height: 84vh; overflow: auto;
  box-shadow: 0 10px 40px rgba(0,0,0,.6); color: #eee;
}
.modal-box h3 { margin: 0 0 12px; font-size: 15px; color: #fff; }
.modal-box label { display: block; font-size: 12px; color: #9aa0a6; margin: 10px 0 3px; }
.modal-box input[type="text"], .modal-box input[type="number"], .modal-box select, .modal-box textarea {
  width: 100%; background: #1f2224; color: #eee; border: 1px solid #4a4f52;
  border-radius: 6px; padding: 6px 8px; font-size: 13px; box-sizing: border-box;
}
.modal-box .row { display: flex; gap: 8px; }
.modal-box .row > * { flex: 1; }
.modal-box .radiorow { display: flex; gap: 14px; align-items: center; font-size: 13px; margin: 4px 0; }
.modal-box .foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.modal-box .foot button.primary { background: var(--accent); }
.modal-box .anchor9 { display: grid; grid-template-columns: repeat(3, 32px); gap: 4px; }
.modal-box .anchor9 button { width: 32px; height: 28px; padding: 0; background: #3a3f42; }
.modal-box .anchor9 button.cur { background: var(--accent); }
.modal-box .err { color: #ef5350; font-size: 12px; margin-top: 8px; }

/* ===== Phase 4: Sửa nội dung (Edit) ===== */
#editModeBtn.active { background: var(--accent); }
.editbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: #2b2f31;
  border-bottom: 1px solid #1c1f21;
  flex: 0 0 auto;
}
.editbar .ed-prop { display: flex; align-items: center; gap: 4px; font-size: 13px; }
.editbar .ed-prop input { width: 56px; }
.editbar button.armed { background: var(--accent); }
#edSave { background: #2e7d32; }
#edSave:disabled { background: #555; }

.edit-stage {
  flex: 1;
  overflow: auto;
  background: #444;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px;
  user-select: none;
}
.edit-inline { user-select: text; }
.edit-page-wrap { position: relative; box-shadow: 0 2px 12px rgba(0,0,0,.5); background: #fff; }
.edit-img { display: block; }
.edit-overlay { position: absolute; inset: 0; }
.edit-overlay.armed { cursor: crosshair; }

.edit-box {
  position: absolute;
  border: 1px solid rgba(77,139,255,.5);
  box-sizing: border-box;
  cursor: move;
}
.edit-box:hover { border-color: var(--accent); background: rgba(77,139,255,.08); }
.edit-box.kind-text { border-style: dashed; }
.edit-box.selected { border: 2px solid var(--accent); background: rgba(77,139,255,.12); }
.edit-box .ed-handle {
  position: absolute;
  width: 10px; height: 10px;
  right: -6px; bottom: -6px;
  background: var(--accent);
  border: 1px solid #fff;
  cursor: nwse-resize;
}
.edit-inline {
  position: absolute;
  z-index: 5;
  border: 2px solid var(--accent);
  background: #fff;
  color: #000;
  padding: 1px 2px;
  outline: none;
  font-family: inherit;
  overflow: hidden;
  white-space: pre;
}