:root {
  --bg: #f6f6f8; --surface: #ffffff; --surface-2: #efeff3; --line: #e2e2e8;
  --text: #17171b; --muted: #6c6c75; --accent: #0F5468; --accent-ink: #fff;
  --danger: #d93f3f; --radius: 12px; --shadow: 0 8px 30px rgba(20, 20, 30, .10);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --thumb: 170px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214; --surface: #1b1c20; --surface-2: #25262b; --line: #2f3036;
    --text: #ececf1; --muted: #9a9aa5; --accent: #4FA3BA; --accent-ink: #0b0d12;
    --shadow: 0 8px 30px rgba(0, 0, 0, .45);
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 14px/1.45 var(--font); -webkit-font-smoothing: antialiased; overscroll-behavior: none; }
button, input { font: inherit; color: inherit; }
svg.ph { width: 20px; height: 20px; fill: currentColor; flex: none; }
[hidden] { display: none !important; }
a { color: var(--accent); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

#app { height: 100dvh; display: grid; grid-template-rows: auto auto minmax(0, 1fr) auto; grid-template-columns: minmax(0, 1fr); }
#app.empty { grid-template-rows: auto minmax(0, 1fr); }
#app.empty .needs-doc { display: none !important; }

.topbar { display: flex; align-items: center; gap: 10px; padding: 8px 12px; padding-top: max(8px, env(safe-area-inset-top)); border-bottom: 1px solid var(--line); background: var(--surface); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; color: var(--text); text-decoration: none; font-size: 15px; flex: none; }
.doc-name { flex: 1; min-width: 0; max-width: 360px; border: 1px solid transparent; background: transparent; border-radius: 8px; padding: 6px 8px; color: var(--muted); }
.doc-name:hover, .doc-name:focus { border-color: var(--line); background: var(--surface); color: var(--text); outline: none; }
.top-actions { display: flex; align-items: center; gap: 6px; margin-left: auto; }

button { cursor: pointer; border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 8px 12px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; transition: background .12s, border-color .12s; }
button:hover:not(:disabled) { background: var(--surface-2); }
button:disabled { opacity: .4; cursor: default; }
button:focus-visible, .card:focus-visible, .grid:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.primary:hover:not(:disabled) { background: var(--accent); filter: brightness(1.1); }
button.icon { padding: 7px; border-color: transparent; background: transparent; }
button.big { padding: 12px 20px; font-size: 16px; border-radius: 12px; }
button.danger { color: var(--danger); }

.actions { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border-bottom: 1px solid var(--line); background: var(--surface); overflow-x: auto; scrollbar-width: none; }
.actions .sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; flex: none; }
.actions button { flex: none; padding: 6px 10px; }
.actions .sel-info { color: var(--muted); font-size: 13px; margin-right: 4px; white-space: nowrap; }

.main { position: relative; overflow: auto; }
.welcome { min-height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 32px 20px; gap: 26px; }
#app:not(.empty) .welcome { display: none; }
.drop { max-width: 560px; width: 100%; text-align: center; padding: 40px 28px; border: 2px dashed var(--line); border-radius: 22px; background: var(--surface); }
.drop h1 { font-size: clamp(24px, 4vw, 32px); letter-spacing: -.02em; margin: 14px 0 8px; line-height: 1.15; }
.drop h1 em { font-style: normal; color: var(--accent); }
.drop p { color: var(--muted); margin: 0 auto 20px; max-width: 440px; }
.drop .hint { margin: 14px auto 0; font-size: 13px; }
.row-center { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.foot { color: var(--muted); font-size: 12px; text-align: center; margin: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--thumb), 1fr)); gap: 18px; padding: 20px; align-content: start; min-height: 100%; outline: none; }
.card { position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 8px; border-radius: 12px; border: 2px solid transparent; user-select: none; -webkit-user-select: none; touch-action: pan-y; cursor: grab; }
.card .thumb { width: 100%; aspect-ratio: var(--ar, .7071); display: grid; place-items: center; }
.card .page { max-width: 100%; max-height: 100%; aspect-ratio: var(--par, .7071); width: 100%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.18), 0 4px 14px rgba(0,0,0,.08); border-radius: 2px; overflow: hidden; display: grid; place-items: center; }
.card .page canvas { width: 100%; height: 100%; display: block; }
.card .page.blank::after { content: "Blank"; color: #aaa; font-size: 12px; }
.card .num { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.card:hover { background: var(--surface-2); }
.card[aria-selected="true"] { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.card[aria-selected="true"] .num { color: var(--accent); font-weight: 600; }
.card.dragging { opacity: .35; }
.card.drop-before::before, .card.drop-after::after { content: ""; position: absolute; top: 6px; bottom: 6px; width: 3px; border-radius: 2px; background: var(--accent); }
.card.drop-before::before { left: -11px; }
.card.drop-after::after { right: -11px; }
.drag-ghost { position: fixed; pointer-events: none; z-index: 50; padding: 4px 8px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); font-size: 12px; font-weight: 600; box-shadow: var(--shadow); transform: translate(12px, 12px); }

.dropzone { position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 18%, transparent); border: 3px dashed var(--accent); pointer-events: none; }
.dropzone div { background: var(--surface); padding: 14px 22px; border-radius: 12px; font-weight: 600; box-shadow: var(--shadow); }

.statusbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 6px 14px; padding-bottom: max(6px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: var(--surface); color: var(--muted); font-size: 12px; }
.statusbar input[type=range] { width: 140px; accent-color: var(--accent); }

dialog { border: 1px solid var(--line); border-radius: 16px; padding: 0; background: var(--surface); color: var(--text); box-shadow: var(--shadow); max-width: min(440px, 92vw); }
dialog::backdrop { background: rgba(0,0,0,.35); }
.dlg { padding: 20px; display: flex; flex-direction: column; gap: 12px; }
.dlg h2 { margin: 0 0 4px; font-size: 17px; }
.dlg .radio { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.dlg input[type=number] { width: 64px; }
.dlg input[type=text] { flex: 1; min-width: 140px; }
.dlg input[type=number], .dlg input[type=text] { border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; background: var(--bg); }
.dlg .hint { margin: 0; color: var(--muted); font-size: 13px; }
.dlg .err { margin: 0; color: var(--danger); font-size: 13px; min-height: 1em; }
.row-end { display: flex; justify-content: flex-end; gap: 8px; }

.toast { position: fixed; left: 50%; bottom: 56px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 13px; transition: opacity .2s, transform .2s; z-index: 60; max-width: 90vw; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 640px) {
  .topbar { gap: 6px; padding: 6px 8px; }
  .brand span { display: none; }
  .top-actions .lbl { display: none; }
  .grid { gap: 10px; padding: 12px; --thumb: 130px; }
  .actions .lbl { display: none; }
  .statusbar .size { display: none; }
}
@media (hover: none) { .card:hover { background: transparent; } }

/* Redaction view */
#app.redacting { grid-template-rows: auto minmax(0, 1fr) auto; }
#app.redacting .grid, #app.redacting .actions, #app.redacting .statusbar .size { display: none !important; }
.rview { position: absolute; inset: 0; display: grid; grid-template-rows: auto minmax(0, 1fr); grid-template-columns: minmax(0, 1fr); background: var(--bg); }
.rbar { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border-bottom: 1px solid var(--line); background: var(--surface); }
.rpage { min-width: 100px; text-align: center; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.rbody { display: grid; grid-template-columns: minmax(0, 1fr) 300px; min-height: 0; }
.rstage { overflow: auto; display: flex; padding: 16px; }
.rstage > .rpagebox { margin: auto; flex: none; }
.rpagebox { position: relative; line-height: 0; box-shadow: 0 2px 6px rgba(0,0,0,.2), 0 10px 30px rgba(0,0,0,.1); background: #fff; cursor: crosshair; touch-action: none; user-select: none; -webkit-user-select: none; }
.rpagebox canvas { display: block; }
.rpagebox.blank { width: 300px; aspect-ratio: .7071; cursor: default; }
.rpanel { border-left: 1px solid var(--line); background: var(--surface); padding: 16px; overflow: auto; display: flex; flex-direction: column; gap: 12px; }
.rpanel h2 { margin: 0; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.rpanel .hint, .rpanel .note, .rcount { margin: 0; color: var(--muted); font-size: 13px; }
.rpanel .note { font-size: 12px; border-top: 1px solid var(--line); padding-top: 12px; }
.rsearch { display: flex; flex-direction: column; gap: 6px; }
.rsearch label, .rq { font-weight: 600; font-size: 13px; display: flex; flex-direction: column; gap: 6px; }
.rsearch .row, .rpanel .row { display: flex; gap: 6px; }
.rpanel .row.wrap { flex-wrap: wrap; }
.rsearch input, .rq select { flex: 1; border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px; background: var(--bg); font-weight: 400; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { padding: 4px 10px; border-radius: 999px; font-size: 12px; }
.rfound { background: var(--surface-2); border-radius: 10px; padding: 10px; font-size: 13px; display: flex; flex-direction: column; gap: 8px; }
.rfound p { margin: 0; }
.card.has-marks .thumb::after { content: "Redacted"; position: absolute; top: 12px; right: 12px; background: #000; color: #fff; font-size: 10px; font-weight: 700; letter-spacing: .04em; padding: 2px 6px; border-radius: 4px; }
@media (max-width: 760px) {
  .rbody { grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) auto; }
  .rpanel { border-left: 0; border-top: 1px solid var(--line); height: 38vh; }
}

.rpagebox canvas.rover { position: absolute; inset: 0; }
.rpagebox canvas.rhl { mix-blend-mode: multiply; pointer-events: none; }
.rpagebox[data-tool=select] { cursor: default; }
.rpagebox[data-tool=text] { cursor: text; }
.rpagebox[data-tool=note] { cursor: copy; }
.tools { display: flex; gap: 2px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.tools .tool { padding: 6px; border-radius: 8px; }
.tools .tool.on { background: var(--accent); color: var(--accent-ink); }
.swatches { display: flex; gap: 8px; flex-wrap: wrap; }
.sw { width: 28px; height: 28px; padding: 0; border-radius: 50%; border: 2px solid var(--line); }
.sw.on { outline: 2px solid var(--accent); outline-offset: 2px; }
.seg { display: flex; gap: 4px; flex-wrap: wrap; }
.seg button { padding: 5px 10px; font-size: 13px; }
.seg button.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.tbox { position: absolute; transform-origin: 0 0; line-height: 1.2; z-index: 2; }
.tbox textarea { display: block; border: 1px dashed var(--accent); background: rgba(255,255,255,.85); color: #1d1d1f; padding: 0; margin: 0; resize: none; overflow: hidden; font-family: Helvetica, Arial, sans-serif; line-height: 1.2; min-width: 120px; outline: none; white-space: pre; }
.tbox.note textarea { background: var(--note, #ffd400); border: 1px solid rgba(0,0,0,.25); border-radius: 6px; padding: 8px; font-size: 13px; width: 220px !important; min-height: 90px; white-space: pre-wrap; box-shadow: var(--shadow); }
@media (max-width: 760px) { .rbar { flex-wrap: wrap; } .tools { margin-left: 0; width: 100%; } }

.zoom { display: flex; align-items: center; gap: 2px; margin-left: 8px; }
.zlabel { min-width: 52px; padding: 4px 6px; border-color: transparent; background: transparent; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.sw.custom { position: relative; overflow: hidden; background: conic-gradient(red, yellow, lime, cyan, blue, magenta, red); display: grid; place-items: center; cursor: pointer; }
.sw.custom::after { content: ""; width: 14px; height: 14px; border-radius: 50%; background: var(--c); border: 2px solid #fff; }
.sw.custom input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%; }
.sl { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; }
.sl-top { display: flex; align-items: center; justify-content: space-between; }
.sl .num { display: flex; align-items: center; gap: 4px; color: var(--muted); font-weight: 400; }
.sl .num input { width: 58px; border: 1px solid var(--line); border-radius: 6px; padding: 3px 6px; background: var(--bg); text-align: right; }
.sl input[type=range] { width: 100%; accent-color: var(--accent); }
@media (max-width: 760px) { .zoom { margin-left: auto; } }