/* Light Table — prepress-inspired PDF workbench
   Palette: graphite chrome, cool light-table bed, guide-blue accent, redline for destructive. */

:root {
  --ink: #17191d;          /* deepest chrome */
  --chrome: #1f2228;       /* toolbar / rails */
  --chrome-2: #262a31;     /* raised surfaces */
  --line: #343943;         /* hairlines on chrome */
  --bed: #40454e;          /* the light table itself */
  --text: #e8eaee;
  --text-dim: #9aa1ac;
  --guide: #4c8dff;        /* guide blue — selection, primary */
  --guide-soft: rgba(76, 141, 255, .18);
  --redline: #ff5c5c;      /* destructive */
  --paper: #ffffff;
  --radius: 6px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; font-family: var(--font); color: var(--text);
  background: var(--ink); overflow: hidden;
  display: flex; flex-direction: column;
}

/* ---------- top bar ---------- */
#topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px; background: var(--chrome);
  border-bottom: 1px solid var(--line); flex: 0 0 auto; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 8px; margin-right: 6px; }
.brand-mark {
  width: 14px; height: 14px; border: 2px solid var(--guide); border-radius: 2px;
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 2px;
  border-left: 2px solid var(--guide); border-bottom: 2px solid var(--guide);
}
.brand-name { font-weight: 600; letter-spacing: .04em; font-size: 14px; }

.tb-group { display: flex; align-items: center; gap: 6px; }
.tb-sep { width: 1px; height: 22px; background: var(--line); }
.tb-spacer { flex: 1; }

.tb-btn {
  font: 500 13px var(--font); color: var(--text);
  background: var(--chrome-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 6px 12px; cursor: pointer;
}
.tb-btn:hover { border-color: var(--guide); }
.tb-btn.ghost { background: transparent; }
.tb-btn.primary { background: var(--guide); border-color: var(--guide); color: #fff; }
.tb-btn.primary:hover { filter: brightness(1.1); }
.tb-btn:disabled { opacity: .4; cursor: default; }

.tools { background: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: 3px; }
.tool-btn {
  font: 500 12.5px var(--font); color: var(--text-dim);
  background: transparent; border: 0; border-radius: 5px;
  padding: 5px 10px; cursor: pointer;
}
.tool-btn:hover { color: var(--text); }
.tool-btn.active { background: var(--guide); color: #fff; }

.zoom { font: 500 12px var(--mono); }
#zoom-label { min-width: 44px; text-align: center; color: var(--text-dim); }

.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 60;
  background: var(--chrome-2); border: 1px solid var(--line); border-radius: 8px;
  min-width: 240px; padding: 6px; display: none;
  box-shadow: 0 12px 30px rgba(0,0,0,.45);
}
.dropdown.open .dropdown-menu { display: block; }
.dropdown-menu button {
  display: block; width: 100%; text-align: left;
  font: 400 13px var(--font); color: var(--text);
  background: none; border: 0; border-radius: 5px; padding: 8px 10px; cursor: pointer;
}
.dropdown-menu button:hover { background: var(--guide-soft); }
.dropdown-menu hr { border: 0; border-top: 1px solid var(--line); margin: 5px 2px; }

/* ---------- workspace ---------- */
#workspace { flex: 1; display: flex; min-height: 0; }

#rail {
  width: 168px; flex: 0 0 auto; background: var(--chrome);
  border-right: 1px solid var(--line); display: flex; flex-direction: column;
}
#rail-head {
  padding: 10px 12px; font: 500 11px var(--mono); text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-dim); border-bottom: 1px solid var(--line);
}
#thumbs { overflow-y: auto; padding: 10px; flex: 1; }

.thumb {
  position: relative; margin: 0 auto 14px; cursor: grab; width: 120px;
  border: 2px solid transparent; border-radius: 4px; padding: 3px;
}
.thumb.current { border-color: var(--guide); }
.thumb.dragging { opacity: .4; }
.thumb.drop-before { box-shadow: 0 -3px 0 0 var(--guide); }
.thumb canvas { display: block; width: 100%; background: var(--paper); box-shadow: 0 1px 4px rgba(0,0,0,.5); }
.thumb .t-num {
  position: absolute; left: 6px; bottom: 24px;
  font: 500 10px var(--mono); background: rgba(0,0,0,.65); color: #fff;
  padding: 1px 5px; border-radius: 3px;
}
.thumb .t-acts { display: flex; gap: 4px; justify-content: center; padding-top: 4px; }
.thumb .t-acts button {
  font: 500 10px var(--mono); background: var(--chrome-2); color: var(--text-dim);
  border: 1px solid var(--line); border-radius: 4px; padding: 2px 6px; cursor: pointer;
}
.thumb .t-acts button:hover { color: var(--text); border-color: var(--guide); }
.thumb .t-acts button.del:hover { color: var(--redline); border-color: var(--redline); }

/* ---------- bed / pages ---------- */
#bed {
  flex: 1; overflow: auto; position: relative;
  background:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px),
    var(--bed);
  background-size: 24px 24px, 24px 24px, auto;
}
#pages { padding: 28px 40px 80px; display: flex; flex-direction: column; align-items: center; gap: 26px; }

.page-wrap { position: relative; box-shadow: 0 6px 24px rgba(0,0,0,.45); background: var(--paper); }
.page-wrap canvas.pg { display: block; }
.overlay { position: absolute; inset: 0; z-index: 2; }

/* selectable text layer (the document's own text) */
.textlayer {
  position: absolute; inset: 0; overflow: hidden; z-index: 1;
  line-height: 1; forced-color-adjust: none;
}
.textlayer span {
  position: absolute; color: transparent; white-space: pre;
  transform-origin: 0 0; cursor: text;
}
.textlayer br { user-select: none; }
.textlayer ::selection { background: rgba(76, 141, 255, .35); }
.textlayer span.search-hit { background: rgba(255, 233, 77, .45); border-radius: 2px; }
.textlayer span.search-hit-current { background: rgba(76, 141, 255, .5); }

/* toolbar search */
.search-group { gap: 4px; }
#search-input {
  font: 400 12.5px var(--font); color: var(--text);
  background: var(--ink); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 6px 10px; width: 170px;
}
#search-input:focus { border-color: var(--guide); outline: none; }
#search-count { font: 500 11px var(--mono); color: var(--text-dim); min-width: 34px; text-align: center; }

/* in Select mode, empty overlay space lets clicks reach the text layer,
   while placed objects stay interactive */
#bed[data-tool="select"] .overlay { pointer-events: none; }
#bed[data-tool="select"] .overlay .obj { pointer-events: auto; }

/* Retype mode: clicks go straight to the document's text */
#bed[data-tool="retype"] .overlay { pointer-events: none; }
#bed[data-tool="retype"] .textlayer span { cursor: pointer; }
#bed[data-tool="retype"] .textlayer span:hover { background: rgba(76, 141, 255, .22); }

/* cursors per tool */
#bed[data-tool="text"] .overlay,
#bed[data-tool="image"] .overlay,
#bed[data-tool="sign"] .overlay { cursor: text; }
#bed[data-tool="whiteout"] .overlay,
#bed[data-tool="highlight"] .overlay,
#bed[data-tool="rect"] .overlay { cursor: crosshair; }
#bed[data-tool="draw"] .overlay { cursor: crosshair; }

/* ---------- objects ---------- */
.obj { position: absolute; }
.obj.selected { outline: 1.5px solid var(--guide); outline-offset: 0; }
.obj .handle {
  position: absolute; right: -6px; bottom: -6px; width: 11px; height: 11px;
  background: var(--guide); border: 2px solid #fff; border-radius: 50%;
  cursor: nwse-resize; display: none;
}
.obj.selected .handle { display: block; }

.obj-text {
  font-family: Helvetica, Arial, sans-serif; line-height: 1.25;
  min-width: 12px; min-height: 1em; cursor: move;
}
.obj-text .txt-inner {
  white-space: pre-wrap; word-break: break-word; outline: none;
  min-height: 1em; width: 100%;
}
.obj-text .txt-inner[contenteditable="true"] { cursor: text; }
.obj-rect  { border: 2px solid; background: transparent; cursor: move; }
.obj-white { background: #fff; cursor: move; }
.obj-hl    { mix-blend-mode: multiply; cursor: move; }
.obj-img img { width: 100%; height: 100%; display: block; cursor: move; }
.obj-ink svg { width: 100%; height: 100%; display: block; overflow: visible; }

/* ---------- floating object bar ---------- */
#objbar {
  position: fixed; z-index: 50; display: flex; gap: 4px; align-items: center;
  background: var(--chrome-2); border: 1px solid var(--line); border-radius: 8px;
  padding: 4px; box-shadow: 0 8px 22px rgba(0,0,0,.5);
}
#objbar button {
  font: 500 12px var(--font); color: var(--text); background: transparent;
  border: 0; border-radius: 5px; padding: 5px 8px; cursor: pointer;
}
#objbar button:hover { background: var(--guide-soft); }
#objbar button.danger { color: var(--redline); }
#objbar input[type="color"] {
  width: 24px; height: 24px; border: 0; padding: 0; background: none; cursor: pointer;
}
#objbar select {
  font: 500 12px var(--font); color: var(--text); background: var(--ink);
  border: 1px solid var(--line); border-radius: 5px; padding: 4px 6px; cursor: pointer;
}
#objbar .active-fmt { background: var(--guide); color: #fff; }

/* ---------- side panel ---------- */
#side-panel {
  width: 300px; flex: 0 0 auto; background: var(--chrome);
  border-left: 1px solid var(--line); display: flex; flex-direction: column;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; border-bottom: 1px solid var(--line);
  font: 500 12px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--text-dim);
}
.icon-btn { background: none; border: 0; color: var(--text-dim); cursor: pointer; font-size: 13px; }
.icon-btn:hover { color: var(--text); }
#panel-body { overflow-y: auto; padding: 14px; flex: 1; }
.ff { margin-bottom: 14px; }
.ff label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 4px; word-break: break-all; }
.ff input[type="text"], .ff select, #pass-input {
  width: 100%; font: 400 13px var(--font); color: var(--text);
  background: var(--ink); border: 1px solid var(--line); border-radius: 5px; padding: 7px 9px;
}
.ff input:focus, #pass-input:focus { border-color: var(--guide); outline: none; }
.ff .chk { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.panel-note { font-size: 11.5px; color: var(--text-dim); line-height: 1.5; margin-top: 10px; }

/* ---------- empty state ---------- */
#empty-state { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.empty-card {
  background: var(--chrome-2); border: 1px dashed var(--line); border-radius: 12px;
  padding: 44px 56px; text-align: center; max-width: 420px;
}
.empty-card.dragover { border-color: var(--guide); background: var(--guide-soft); }
.empty-title { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.empty-sub { color: var(--text-dim); font-size: 13px; margin-bottom: 12px; }
.empty-hint { color: var(--text-dim); font-size: 12px; line-height: 1.6; margin-top: 20px; }

/* ---------- status bar ---------- */
#statusbar {
  flex: 0 0 auto; display: flex; align-items: center; gap: 10px;
  padding: 5px 14px; background: var(--chrome); border-top: 1px solid var(--line);
  font: 400 11.5px var(--mono); color: var(--text-dim);
}

/* ---------- modals ---------- */
.modal {
  position: fixed; inset: 0; z-index: 100; display: flex;
  align-items: center; justify-content: center; background: rgba(10,11,14,.7);
}
.modal-box {
  background: var(--chrome-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 20px; width: min(620px, 92vw);
}
.modal-title { font-weight: 600; margin-bottom: 14px; }
.modal-actions { display: flex; gap: 8px; margin-top: 14px; align-items: center; }
#sign-canvas { background: #fff; border-radius: 6px; width: 100%; touch-action: none; cursor: crosshair; }
#pass-input { margin-top: 4px; }

.busy-box { text-align: center; color: var(--text); }
.spinner {
  width: 34px; height: 34px; margin: 0 auto 14px;
  border: 3px solid var(--line); border-top-color: var(--guide); border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#toast {
  position: fixed; bottom: 46px; left: 50%; transform: translateX(-50%); z-index: 120;
  background: var(--chrome-2); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 16px; font-size: 13px; box-shadow: 0 8px 22px rgba(0,0,0,.5);
  max-width: 80vw;
}
#toast.err { border-color: var(--redline); }

.hidden { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2s; }
}
@media (max-width: 900px) {
  #rail { width: 118px; }
  .thumb { width: 84px; }
  #side-panel { position: absolute; right: 0; top: 0; bottom: 0; z-index: 40; }
  #status-hint { display: none; }
}