/* ProSync AI PDF */

/* violet accent for this app */
body.ai-page {
  --accent: #7c3aed;
  --accent-ink: #ffffff;
  --accent-soft: #f1eafe;
  --accent-line: #ddd0fb;
  --glow: rgba(124, 58, 237, 0.16);
  --ai-mark: #fde68a;
  --ai-paper: #e9ecf2;
  --ai-good: #15803d;
  --ai-good-soft: #e8f7ee;
  --ai-bad: #c2261a;
  --ai-bad-soft: #fdecea;
}
:root[data-theme="dark"] body.ai-page {
  --accent: #a78bfa;
  --accent-ink: #160b2e;
  --accent-soft: #241a3d;
  --accent-line: #3b2d63;
  --glow: rgba(167, 139, 250, 0.2);
  --ai-mark: #6b4f0e;
  --ai-paper: #0a0e14;
  --ai-good: #5fd08a;
  --ai-good-soft: #13291d;
  --ai-bad: #ff8a80;
  --ai-bad-soft: #3a1714;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body.ai-page {
    --accent: #a78bfa;
    --accent-ink: #160b2e;
    --accent-soft: #241a3d;
    --accent-line: #3b2d63;
    --glow: rgba(167, 139, 250, 0.2);
    --ai-mark: #6b4f0e;
    --ai-paper: #0a0e14;
    --ai-good: #5fd08a;
    --ai-good-soft: #13291d;
    --ai-bad: #ff8a80;
    --ai-bad-soft: #3a1714;
  }
}

/* full-height app, inner parts scroll */
html:has(body.ai-page) { overflow-x: hidden; max-width: 100%; }
body.ai-page { overflow: hidden; display: flex; flex-direction: column; height: 100vh; height: 100dvh; margin: 0; width: 100%; max-width: 100vw; min-width: 0; }
body.ai-page > header { flex-shrink: 0; }
body.ai-page footer { display: none; }
body.ai-page main { padding: 0; margin: 0; flex: 1; min-height: 0; min-width: 0; width: 100%; max-width: 100vw; display: flex; flex-direction: column; overflow: hidden; }
#ai-app {
  position: relative; flex: 1; min-height: 0; min-width: 0; width: 100%; max-width: 100vw; display: flex; flex-direction: column; overflow: hidden;
  background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 15px; line-height: 1.6;
}
#ai-app button, #ai-app input, #ai-app select, #ai-app textarea { font: inherit; color: inherit; }
.ai-page .sx-spin { border-top-color: var(--accent); }
.ai-i { width: 18px; height: 18px; flex: none; }
.ai-i.sm { width: 14px; height: 14px; opacity: .7; }
.ai-i.big { width: 40px; height: 40px; stroke-width: 1.4; }
.ai-bar-gap { flex: 1; }
.ai-muted { color: var(--muted); }

/* ---------- start page ---------- */
.ai-page .sx-action:hover, .ai-page .sx-card:hover { border-color: var(--accent); box-shadow: 0 8px 22px var(--glow); }
.ai-page .sx-action .ic { color: var(--accent); }
.ai-page .sx-action .go { display: grid; place-items: center; }
.ai-page .sx-action .go svg { width: 22px; height: 22px; }
.ai-page .sx-drop:hover, .ai-page .sx-drop.on, body.ai-dragging.ai-page .sx-drop { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.ai-page .sx-recent-row:hover, .ai-page .sx-recent-row:focus { background: var(--accent-soft); }
.ai-page .sx-recent-x { display: grid; place-items: center; }
.ai-page .sx-recent-x svg { width: 15px; height: 15px; }
.ai-drop { display: flex; align-items: center; justify-content: center; gap: 10px; }
.ai-drop svg { width: 20px; height: 20px; }
.ai-hero.sx-hero { background: linear-gradient(115deg, #f1eafe 0%, #f5f0ff 50%, #e9f0fb 100%); border-color: #e3d8fb; }
:root[data-theme="dark"] .ai-hero.sx-hero { background: linear-gradient(115deg, #231943 0%, #1b1631 55%, #14203a 100%); border-color: #33285a; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .ai-hero.sx-hero { background: linear-gradient(115deg, #231943 0%, #1b1631 55%, #14203a 100%); border-color: #33285a; }
}
.ai-hero h1 { font-weight: 600; font-size: 28px; line-height: 1.3; }
.ai-kicker {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; letter-spacing: .02em;
  color: var(--accent); background: var(--bg); border: 1px solid var(--accent-line); border-radius: 999px; padding: 2px 10px 2px 8px; margin-bottom: 10px;
}
.ai-kicker svg { width: 15px; height: 15px; }
.ai-hero .ai-hero-art { width: 240px; height: 130px; }
.ai-engine-strip {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: space-between;
  margin: 14px 0 0; padding: 10px 12px 10px 16px; border-radius: 12px; background: var(--bg-soft); border: 1px solid var(--line); font-size: 14px;
}
.ai-engine-now { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); min-width: 0; }
.ai-engine-now b { color: var(--ink); font-weight: 600; }
.ai-dot { width: 8px; height: 8px; border-radius: 50%; background: #16a34a; flex: none; box-shadow: 0 0 0 3px rgba(22, 163, 74, .18); }
.ai-dot.on { background: var(--accent); box-shadow: 0 0 0 3px var(--glow); }
.ai-feats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.ai-feat {
  display: flex; gap: 12px; align-items: flex-start; padding: 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg-soft);
}
.ai-feat .ic { flex: none; width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.ai-feat b { display: block; font-weight: 600; font-size: 14.5px; line-height: 1.35; }
.ai-feat small { display: block; color: var(--muted); font-size: 12.5px; line-height: 1.45; margin-top: 2px; }
.ai-kind { font-size: 9.5px; letter-spacing: .02em; background: #dc2626; }
.ai-kind-image { background: #0891b2; }
.ai-kind-docx { background: #1d4ed8; }
.ai-kind-text { background: #64748b; }
.ai-privacy { display: flex; gap: 10px; align-items: flex-start; color: var(--muted); font-size: 13px; margin: 26px 0 0; line-height: 1.55; }
.ai-privacy svg { width: 18px; height: 18px; flex: none; margin-top: 1px; }

/* ---------- buttons, inputs ---------- */
.ai-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 40px; padding: 0 16px;
  border-radius: 10px; border: 1px solid var(--line); background: var(--bg); cursor: pointer; font-weight: 500; white-space: nowrap;
  transition: background .15s, border-color .15s, box-shadow .15s, transform .1s;
}
.ai-btn:hover:not(:disabled) { background: var(--bg-soft); }
.ai-btn:active:not(:disabled) { transform: translateY(1px); }
.ai-btn:disabled { cursor: default; opacity: .85; }
.ai-btn.primary { background: var(--accent); border-color: transparent; color: var(--accent-ink) !important; box-shadow: 0 4px 14px var(--glow); }
.ai-btn.primary:hover:not(:disabled) { background: var(--accent); filter: brightness(1.07); }
.ai-btn.ghost { background: transparent; }
.ai-btn.danger { color: var(--ai-bad) !important; }
.ai-btn.danger:hover:not(:disabled) { background: var(--ai-bad-soft); }
.ai-btn.sm { min-height: 32px; padding: 0 11px; font-size: 13.5px; border-radius: 8px; }
.ai-btn .ai-i { width: 17px; height: 17px; }
.ai-icon-btn {
  display: inline-grid; place-items: center; width: 38px; height: 38px; flex: none; padding: 0;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg); cursor: pointer;
}
.ai-icon-btn:hover:not(:disabled) { background: var(--bg-soft); }
.ai-icon-btn:disabled { opacity: .4; cursor: default; }
.ai-icon-btn.sm { width: 30px; height: 30px; border-radius: 8px; }
.ai-icon-btn.sm .ai-i { width: 16px; height: 16px; }
.ai-mini {
  display: inline-flex; align-items: center; gap: 5px; height: 30px; padding: 0 9px; border: 1px solid transparent; border-radius: 8px;
  background: transparent; cursor: pointer; font-size: 12.5px; color: var(--muted) !important; white-space: nowrap;
}
.ai-mini:hover { background: var(--bg-soft); border-color: var(--line); color: var(--ink) !important; }
.ai-mini .ai-i { width: 15px; height: 15px; }
.ai-link { border: 0; background: none; padding: 0; color: var(--accent) !important; cursor: pointer; font-size: inherit; text-decoration: underline; text-underline-offset: 3px; }
.ai-input {
  width: 100%; min-height: 40px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg);
  outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea.ai-input { resize: vertical; line-height: 1.55; }
.ai-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--glow); }
select.ai-input { cursor: pointer; }
.ai-lbl { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin: 0 0 6px; }
.ai-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 10px; }
.ai-seg {
  display: inline-flex; flex-wrap: wrap; gap: 3px; padding: 3px; border-radius: 11px; background: var(--bg-soft); border: 1px solid var(--line);
}
.ai-seg button {
  display: inline-flex; align-items: center; gap: 6px; border: 0; background: transparent; border-radius: 8px; padding: 5px 12px;
  cursor: pointer; font-size: 13.5px; color: var(--muted) !important; white-space: nowrap;
}
.ai-seg button:hover { color: var(--ink) !important; }
.ai-seg button.on { background: var(--bg); color: var(--accent) !important; font-weight: 600; box-shadow: 0 1px 3px rgba(16, 24, 40, .12); }
.ai-seg button .ai-i { width: 15px; height: 15px; }
.ai-spin {
  width: 16px; height: 16px; border-radius: 50%; border: 2px solid rgba(255, 255, 255, .45); border-top-color: #fff;
  animation: sx-spin .8s linear infinite; flex: none;
}
.ai-spin.dark { border-color: var(--line); border-top-color: var(--accent); }
.ai-progress { height: 6px; border-radius: 99px; background: var(--line); overflow: hidden; }
.ai-progress i { display: block; height: 100%; width: 2%; background: linear-gradient(90deg, var(--accent), #c084fc); border-radius: inherit; transition: width .3s ease; }
.ai-progress.slim { height: 4px; margin: 4px 0 14px; }

/* ---------- workspace ---------- */
.ai-mode-start { overflow-y: auto !important; overflow-x: hidden; }
.ai-mode-work .ai-bar {
  display: flex; align-items: center; gap: 10px; min-width: 0; max-width: 100%; padding: 8px 14px; border-bottom: 1px solid var(--line); flex-shrink: 0; min-height: 58px;
  background: var(--bg);
}
.ai-bar .brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 17px; flex: none; }
.ai-bar .brand svg { width: 28px; height: 28px; }
.ai-bar .controls { display: flex; gap: 8px; align-items: center; flex: none; }
.ai-bar > * { min-width: 0; }
.ai-closefile { flex: none; padding: 0 12px 0 10px; }
.ai-previewtoggle.on { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent) !important; }
.ai-bar .controls .icon-btn, .ai-bar .controls .lang { height: 38px; }
.ai-bar .controls .icon-btn { width: 38px; }
.ai-docname { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 0 1 auto; }
.ai-docname > span:last-child { min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.ai-docname b { font-weight: 600; font-size: 14.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 34vw; }
.ai-docname small { color: var(--muted); font-size: 12px; white-space: nowrap; }
.ai-docic { width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center; color: #fff; background: #dc2626; flex: none; }
.ai-docic.ai-kind-image { background: #0891b2; }
.ai-docic.ai-kind-docx { background: #1d4ed8; }
.ai-docic.ai-kind-text { background: #64748b; }
.ai-docic svg { width: 18px; height: 18px; }
.ai-chip {
  display: inline-flex; align-items: center; gap: 7px; height: 36px; padding: 0 12px; border-radius: 999px; cursor: pointer; flex: none;
  border: 1px solid var(--accent-line); background: var(--accent-soft); color: var(--accent) !important; font-size: 13px; font-weight: 600; max-width: 260px;
}
.ai-chip:hover { box-shadow: 0 0 0 3px var(--glow); }
.ai-chip-t { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ai-switch { display: none; }

.ai-work { flex: 1; min-height: 0; min-width: 0; display: grid; grid-template-columns: minmax(0, 45fr) minmax(0, 55fr); }
#ai-app[data-preview="off"] .ai-work { grid-template-columns: minmax(0, 1fr); }
#ai-app[data-preview="off"] .ai-view { display: none; }
.ai-view-x { margin-left: 4px; }
.ai-view { min-width: 0; min-height: 0; display: flex; flex-direction: column; background: var(--ai-paper); border-right: 1px solid var(--line); }
.ai-view-bar {
  display: flex; align-items: center; gap: 6px; min-width: 0; flex-wrap: wrap; padding: 7px 12px; border-bottom: 1px solid var(--line); background: var(--bg-soft); flex-shrink: 0; min-height: 46px;
}
.ai-pageind { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.ai-pageind b { color: var(--ink); }
.ai-zoomval { font-size: 12.5px; min-width: 44px; text-align: center; color: var(--muted); font-variant-numeric: tabular-nums; }
.ai-view-bar .ai-btn.sm { margin-left: 6px; }
.ai-pages { flex: 1; min-height: 0; overflow: auto; padding: 18px; overscroll-behavior: contain; }
.ai-pages-in { margin: 0 auto; max-width: none; display: flex; flex-direction: column; gap: 16px; min-width: 200px; }
.ai-pages-in.text { max-width: 760px; }
.ai-pg {
  position: relative; width: 100%; background: #fff; border-radius: 4px; box-shadow: 0 1px 3px rgba(16, 24, 40, .12), 0 6px 18px rgba(16, 24, 40, .08);
  overflow: hidden; transition: box-shadow .3s;
}
.ai-pg canvas, .ai-pg img { display: block; width: 100%; height: 100%; object-fit: contain; }
.ai-pg-n {
  position: absolute; right: 8px; bottom: 8px; font-size: 11.5px; padding: 1px 8px; border-radius: 99px;
  background: rgba(17, 24, 39, .66); color: #fff; font-variant-numeric: tabular-nums;
}
.ai-pg.flash { box-shadow: 0 0 0 3px var(--accent), 0 8px 30px var(--glow); }
.ai-pg-text { background: var(--bg); color: var(--ink); padding: 26px 28px 34px; }
.ai-pg-txt { white-space: pre-wrap; word-break: break-word; font-size: 14px; line-height: 1.75; font-family: "Sarabun", var(--font); }
.ai-textonly { display: flex; gap: 8px; align-items: center; }

.ai-side { min-width: 0; min-height: 0; display: flex; flex-direction: column; background: var(--bg); }
.ai-tabs {
  display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 10px; border-bottom: 1px solid var(--line); flex-shrink: 0; min-width: 0; max-width: 100%;
}
.ai-showpreview { border: 1px dashed var(--accent-line); color: var(--accent) !important; }
.ai-tab {
  position: relative; display: inline-flex; align-items: center; gap: 7px; flex: none; height: 38px; padding: 0 12px; border: 0; border-radius: 10px;
  background: transparent; cursor: pointer; font-size: 13.5px; color: var(--muted) !important; white-space: nowrap;
}
.ai-tab:hover { background: var(--bg-soft); color: var(--ink) !important; }
.ai-tab.on { background: var(--accent-soft); color: var(--accent) !important; font-weight: 600; }
.ai-tab .ai-i { width: 17px; height: 17px; }
.ai-tab-dot { position: absolute; top: 6px; right: 5px; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: ai-pulse 1s ease-in-out infinite alternate; }
@keyframes ai-pulse { to { opacity: .3; } }
.ai-panel { flex: 1; min-height: 0; min-width: 0; overflow-y: auto; overflow-x: hidden; padding: 18px 20px 40px; display: flex; flex-direction: column; gap: 14px; }
.ai-panel > * { max-width: 860px; width: 100%; min-width: 0; margin-inline: auto; }
.ai-panel > [hidden] { display: none; }
.ai-head h2 { display: flex; align-items: center; gap: 9px; margin: 0; font-size: 19px; font-weight: 600; }
.ai-head h2 .ai-i { width: 22px; height: 22px; color: var(--accent); }
.ai-head > p { margin: 3px 0 10px; color: var(--muted); font-size: 14px; }
.ai-engine-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ai-engine-hint { font-size: 12.5px; color: var(--muted); }

.ai-card { border: 1px solid var(--line); border-radius: 14px; background: var(--bg); padding: 14px 16px; box-shadow: var(--shadow); }
.ai-controls { display: grid; grid-template-columns: auto 1fr; gap: 10px 14px; align-items: center; box-shadow: none; background: var(--bg-soft); }
.ai-controls .ai-lbl { margin: 0; }
.ai-controls .ai-seg { justify-self: start; }
.ai-controls .ai-input { grid-column: 1 / -1; }
.ai-controls .ai-seg + .ai-input { grid-column: 2; }
.ai-run { grid-column: 1 / -1; display: flex; gap: 8px; flex-wrap: wrap; }
.ai-controls > .ai-run:only-child { margin: 0; }
.ai-run .ai-btn.primary { min-width: 170px; }
.ai-note-sm { display: flex; gap: 7px; align-items: flex-start; font-size: 12.5px; color: var(--muted); margin: 0; line-height: 1.5; }
.ai-note-sm .ai-i { width: 15px; height: 15px; margin-top: 2px; }
.ai-empty { text-align: center; color: var(--muted); padding: 36px 12px; border: 1.5px dashed var(--line); border-radius: 14px; }
.ai-empty .ai-i { color: var(--accent); opacity: .55; }
.ai-empty p { margin: 8px 0 0; font-size: 14px; }
.ai-error { display: flex; gap: 10px; border-color: #f3c2bd; background: var(--ai-bad-soft); color: var(--ai-bad); box-shadow: none; }
.ai-error .ai-i { margin-top: 3px; }
.ai-warn, .ai-ocr, .ai-needapi { display: flex; gap: 12px; align-items: flex-start; box-shadow: none; }
.ai-warn { background: var(--warn-soft, #fff7e6); border-color: #f5dca6; }
.ai-warn > .ai-i, .ai-ocr > .ai-i { width: 22px; height: 22px; color: var(--accent); margin-top: 2px; }
.ai-warn b, .ai-ocr b, .ai-needapi b { font-weight: 600; }
.ai-warn p, .ai-ocr p, .ai-needapi p { margin: 3px 0 0; color: var(--muted); font-size: 13.5px; }
.ai-ocr { background: var(--accent-soft); border-color: var(--accent-line); flex-wrap: wrap; }
.ai-ocr-top { display: flex; align-items: center; gap: 10px; width: 100%; font-size: 14px; }
.ai-ocr-top .ai-i { color: var(--accent); }
.ai-ocr-msg { flex: 1; }
.ai-ocr .ai-progress { width: 100%; }
.ai-needapi { background: linear-gradient(120deg, var(--accent-soft), var(--bg)); border-color: var(--accent-line); }
.ai-needapi-ic { flex: none; width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: var(--accent); color: #fff; }
.ai-needapi-ic .ai-i { width: 22px; height: 22px; }

/* results */
.ai-out { padding: 6px 18px 16px; }
.ai-out-head { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; padding: 6px 0 8px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.ai-badge {
  display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600; padding: 2px 9px 2px 7px; border-radius: 99px;
  background: var(--good-soft, #e9f7ee); color: var(--good, #15803d);
}
.ai-badge .ai-i { width: 14px; height: 14px; }
.ai-badge.api { background: var(--accent-soft); color: var(--accent); }
.ai-md { font-size: 15px; line-height: 1.8; overflow-wrap: anywhere; }
.ai-md h3 { font-size: 17px; margin: 16px 0 6px; font-weight: 600; }
.ai-md h4 { font-size: 15.5px; margin: 14px 0 4px; font-weight: 600; }
.ai-md h5 { font-size: 14.5px; margin: 12px 0 4px; }
.ai-md > :first-child { margin-top: 4px; }
.ai-md p { margin: 6px 0 10px; }
.ai-md ul, .ai-md ol { margin: 4px 0 10px; padding-left: 22px; }
.ai-md li { margin: 4px 0; }
.ai-md li::marker { color: var(--accent); }
.ai-md blockquote {
  margin: 12px 0 4px; padding: 8px 12px; border-left: 3px solid var(--accent-line); background: var(--bg-soft); border-radius: 0 8px 8px 0;
  color: var(--muted); font-size: 13px; line-height: 1.6;
}
.ai-md code { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 5px; padding: 0 5px; font-size: .9em; }
.ai-md pre { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; overflow: auto; font-size: 13px; line-height: 1.5; }
.ai-md pre code { background: none; border: 0; padding: 0; }
.ai-md hr { border: 0; border-top: 1px solid var(--line); margin: 14px 0; }
.ai-md strong { font-weight: 600; }
.ai-cite {
  display: inline-flex; align-items: center; height: 21px; padding: 0 7px; margin: 0 2px; vertical-align: 1px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--accent-line); background: var(--accent-soft); color: var(--accent) !important; font-size: 11.5px !important; font-weight: 600; line-height: 1; white-space: nowrap;
}
.ai-cite:hover { background: var(--accent); color: var(--accent-ink) !important; }
.ai-caret { display: inline-block; width: 8px; height: 17px; margin-left: 2px; vertical-align: -3px; background: var(--accent); border-radius: 2px; animation: ai-blink 1s steps(2) infinite; }
@keyframes ai-blink { 50% { opacity: 0; } }
.ai-tablewrap { overflow: auto; border: 1px solid var(--line); border-radius: 10px; margin: 8px 0; max-height: 420px; }
.ai-tablewrap table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.ai-tablewrap th, .ai-tablewrap td { border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
.ai-tablewrap tr > :last-child { border-right: 0; }
.ai-tablewrap tr:last-child > * { border-bottom: 0; }
.ai-tablewrap th { background: var(--bg-soft); font-weight: 600; position: sticky; top: 0; }
.ai-tbl { margin: 8px 0 14px; }
.ai-tbl-h { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ai-tbl-h b { font-weight: 600; }
.ai-tbl-h small { color: var(--muted); font-size: 12px; }

/* save menu */
.ai-save { position: relative; flex: none; margin-left: 4px; }
.ai-save-btn { border-color: var(--accent-line); color: var(--accent) !important; background: var(--accent-soft); font-weight: 600; }
.ai-save-btn:hover:not(:disabled) { background: var(--accent-soft); box-shadow: 0 0 0 3px var(--glow); }
.ai-save-menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 40; width: 250px; max-width: calc(100vw - 32px); padding: 6px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 14px 36px rgba(0, 0, 0, .22); display: grid; gap: 2px;
}
.ai-save-menu[hidden] { display: none; }
.ai-save-menu.up { top: auto; bottom: calc(100% + 6px); }
.ai-save-h { font-size: 12px; color: var(--muted); padding: 2px 8px 4px; }
.ai-save-menu button { display: flex; align-items: center; gap: 10px; width: 100%; text-align: left; padding: 7px 8px; border: 0; border-radius: 8px; background: transparent; cursor: pointer; }
.ai-save-menu button:hover, .ai-save-menu button:focus-visible { background: var(--accent-soft); outline: none; }
.ai-save-menu b { flex: none; min-width: 46px; font-weight: 600; font-size: 13.5px; color: var(--accent); display: inline-flex; }
.ai-save-menu small { font-size: 12.5px; color: var(--muted); line-height: 1.35; }
.ai-chat-tools { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; font-size: 13px; margin-bottom: -6px; }

/* key points */
.ai-chips { display: flex; flex-wrap: wrap; gap: 7px; margin: 6px 0 8px; }
.ai-kw {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 11px; border-radius: 99px; cursor: pointer; font-size: 13.5px;
  border: 1px solid var(--accent-line); background: color-mix(in srgb, var(--accent) calc(var(--w, .6) * 16%), var(--bg)); color: var(--ink) !important;
}
.ai-kw small { font-size: 11px; color: var(--accent); font-weight: 600; }
.ai-kw:hover { border-color: var(--accent); }
.ai-ents { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; margin: 6px 0; }
.ai-ent { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; background: var(--bg-soft); }
.ai-ent-h { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.ai-ent-h small { color: var(--muted); font-weight: 400; margin-left: 4px; }
.ai-ent ul { list-style: none; margin: 0; padding: 0; }
.ai-ent li { display: flex; align-items: baseline; gap: 4px; flex-wrap: wrap; font-size: 13.5px; line-height: 1.5; padding: 3px 0; border-top: 1px dashed var(--line); }
.ai-ent li:first-child { border-top: 0; }
.ai-ent li > span { flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }

/* chat */
.ai-chat { display: flex; flex-direction: column; flex: 1; min-height: 360px; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--bg); box-shadow: var(--shadow); }
.ai-chat-log { flex: 1; min-height: 0; overflow: auto; padding: 16px; display: flex; flex-direction: column; gap: 14px; max-height: calc(100dvh - 330px); }
.ai-chat-empty { text-align: center; color: var(--muted); margin: auto 0; padding: 20px 0; }
.ai-chat-empty .ai-i { color: var(--accent); opacity: .55; }
.ai-chat-empty p { margin: 6px 0 12px; }
.ai-sugg { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.ai-sugg-b {
  border: 1px solid var(--line); background: var(--bg-soft); padding: 7px 13px; border-radius: 99px; cursor: pointer; font-size: 13.5px; text-align: left;
}
.ai-sugg-b:hover { border-color: var(--accent); color: var(--accent) !important; }
.ai-sugg-b.sm { padding: 3px 10px; font-size: 12.5px; }
.ai-msg { display: flex; }
.ai-msg.me { justify-content: flex-end; }
.ai-bubble {
  max-width: 82%; padding: 9px 14px; border-radius: 16px 16px 4px 16px; background: var(--accent); color: var(--accent-ink);
  white-space: pre-wrap; overflow-wrap: anywhere; font-size: 14.5px;
}
.ai-answer { max-width: 100%; width: 100%; padding: 10px 14px 6px; border: 1px solid var(--line); border-radius: 4px 16px 16px 16px; background: var(--bg-soft); }
.ai-msg-head { margin-bottom: 4px; }
.ai-found-label { display: flex; align-items: center; gap: 7px; font-weight: 600; font-size: 13.5px; color: var(--accent); margin: 2px 0 6px; }
.ai-found-label .ai-i { width: 16px; height: 16px; }
.ai-passage {
  margin: 0 0 8px; padding: 8px 12px; border-left: 3px solid var(--accent); background: var(--bg); border-radius: 0 10px 10px 0;
  font-size: 14px; line-height: 1.75; overflow-wrap: anywhere;
}
.ai-passage mark, .ai-md mark { background: var(--ai-mark); color: inherit; border-radius: 3px; padding: 0 1px; }
.ai-answer .ai-note-sm { margin: 6px 0 4px; }
.ai-chat-input { display: flex; align-items: flex-end; gap: 8px; padding: 10px; border-top: 1px solid var(--line); background: var(--bg); }
.ai-chat-input textarea {
  flex: 1; min-height: 42px; max-height: 160px; resize: none; border: 1px solid var(--line); border-radius: 12px; padding: 9px 12px;
  background: var(--bg-soft); outline: none; line-height: 1.5;
}
.ai-chat-input textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--glow); background: var(--bg); }
.ai-chat-input .ai-mini { height: 42px; }
.ai-send {
  width: 42px; height: 42px; flex: none; border-radius: 12px; border: 0; cursor: pointer; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink) !important;
}
.ai-send.stop { background: var(--ink); color: var(--bg) !important; }
.ai-send .ai-i { width: 19px; height: 19px; }
.ai-typing { display: inline-flex; gap: 4px; padding: 8px 0; }
.ai-typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: ai-bounce 1s infinite ease-in-out; }
.ai-typing i:nth-child(2) { animation-delay: .15s; }
.ai-typing i:nth-child(3) { animation-delay: .3s; }
@keyframes ai-bounce { 0%, 80%, 100% { opacity: .3; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-4px); } }

/* quiz */
.ai-quiz-modes { margin: 4px 0 12px; }
.ai-qlist { margin: 0; padding-left: 26px; }
.ai-qlist > li::marker { color: var(--accent); font-weight: 600; }
.ai-q { margin-bottom: 16px; }
.ai-q > p { margin: 0 0 8px; font-weight: 500; line-height: 1.7; }
.ai-opts { list-style: none; margin: 0; padding: 0; display: grid; gap: 5px; }
.ai-opts li { display: flex; gap: 9px; align-items: baseline; padding: 5px 10px; border-radius: 8px; border: 1px solid var(--line); font-size: 14px; }
.ai-opts li.right { border-color: var(--ai-good); background: var(--ai-good-soft); }
.ai-opts i, .ai-choice i { font-style: normal; font-weight: 600; color: var(--accent); flex: none; }
.ai-q-foot { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 8px; font-size: 13.5px; }
.ai-q.play > p { font-size: 17px; }
.ai-q-n { font-size: 12.5px; color: var(--muted); margin-bottom: 6px; }
.ai-choices { display: grid; gap: 8px; }
.ai-choice {
  display: flex; gap: 12px; align-items: baseline; text-align: left; padding: 11px 14px; border: 1.5px solid var(--line); border-radius: 12px;
  background: var(--bg); cursor: pointer; transition: border-color .15s, background .15s;
}
.ai-choice:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.ai-choice:disabled { cursor: default; }
.ai-choice.right { border-color: var(--ai-good); background: var(--ai-good-soft); }
.ai-choice.wrong { border-color: var(--ai-bad); background: var(--ai-bad-soft); }
.ai-good, .ai-bad { display: inline-flex; align-items: center; gap: 5px; font-weight: 600; }
.ai-good { color: var(--ai-good); }
.ai-bad { color: var(--ai-bad); }
.ai-score { text-align: center; padding: 22px 0 10px; }
.ai-score-ring {
  width: 120px; height: 120px; margin: 0 auto 12px; border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--accent) calc(var(--p) * 1%), var(--line) 0);
}
.ai-score-ring b { width: 94px; height: 94px; border-radius: 50%; background: var(--bg); display: grid; place-items: center; font-size: 24px; font-weight: 600; }
.ai-flash-wrap { padding: 10px 0 4px; }
.ai-flash { display: block; width: 100%; height: 250px; border: 0; padding: 0; background: none; cursor: pointer; perspective: 1200px; }
.ai-flash-in { position: relative; display: block; width: 100%; height: 100%; transition: transform .5s cubic-bezier(.2, .7, .2, 1); transform-style: preserve-3d; }
.ai-flash.flipped .ai-flash-in { transform: rotateY(180deg); }
.ai-flash-face {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 20px 26px;
  border-radius: 18px; backface-visibility: hidden; -webkit-backface-visibility: hidden; border: 1px solid var(--accent-line); overflow: auto;
}
.ai-flash-face.front { background: linear-gradient(135deg, var(--accent-soft), var(--bg)); }
.ai-flash-face.back { transform: rotateY(180deg); background: var(--bg); font-size: 15px; line-height: 1.7; }
.ai-flash-face small { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.ai-flash-face b { font-size: 24px; font-weight: 600; color: var(--accent); text-align: center; }
.ai-flash-face mark { background: var(--ai-mark); color: inherit; border-radius: 3px; padding: 0 2px; }
.ai-flash-face em { font-style: normal; font-size: 12.5px; color: var(--muted); }
.ai-flash-nav { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 14px; flex-wrap: wrap; font-variant-numeric: tabular-nums; }

/* pop-ups */
.ai-modal { position: fixed; inset: 0; z-index: 90; display: grid; place-items: center; padding: 16px; background: rgba(10, 12, 20, .5); backdrop-filter: blur(3px); animation: ai-fade .15s ease-out; }
@keyframes ai-fade { from { opacity: 0; } }
.ai-dialog {
  width: min(560px, 100%); max-height: calc(100dvh - 32px); overflow: auto; background: var(--bg); color: var(--ink); border-radius: 18px;
  border: 1px solid var(--line); box-shadow: 0 24px 60px rgba(0, 0, 0, .3); padding: 18px 20px; font-family: var(--font); font-size: 15px; line-height: 1.6;
  display: flex; flex-direction: column; gap: 12px;
}
.ai-dialog button, .ai-dialog input, .ai-dialog select, .ai-dialog textarea { font: inherit; color: inherit; }
.ai-dialog-h { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.ai-dialog-h h2 { display: flex; align-items: center; gap: 9px; margin: 0; font-size: 19px; font-weight: 600; }
.ai-dialog-h h2 .ai-i { color: var(--accent); width: 22px; height: 22px; }
.ai-dialog-f { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding-top: 6px; }
.ai-dialog .ai-lbl { margin-top: 2px; }
.ai-dialog .ai-lbl a { font-weight: 500; margin-left: 6px; color: var(--accent); }
.ai-engines { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ai-eng {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px; text-align: left; padding: 12px 14px; border-radius: 14px; cursor: pointer;
  border: 1.5px solid var(--line); background: var(--bg);
}
.ai-eng .ic { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: var(--bg-soft); color: var(--muted); margin-bottom: 4px; }
.ai-eng b { font-weight: 600; font-size: 14.5px; }
.ai-eng small { color: var(--muted); font-size: 12.5px; line-height: 1.5; }
.ai-eng.on { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 3px var(--glow); }
.ai-eng.on .ic { background: var(--accent); color: #fff; }
.ai-form { display: flex; flex-direction: column; gap: 6px; transition: opacity .2s; }
.ai-form.dim { opacity: .55; }
.ai-keyrow { display: flex; gap: 6px; }
.ai-keyrow .ai-input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13.5px; }
.ai-keycheck { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 2px; }
.ai-keystat { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); min-width: 0; flex: 1 1 200px; flex-wrap: wrap; }
.ai-keystat .ai-good, .ai-keystat .ai-bad { align-items: flex-start; font-weight: 500; }
.ai-keystat .ai-i { width: 16px; height: 16px; margin-top: 3px; }
.ai-modelsrc { margin: 0; font-size: 12px; color: var(--muted); }
.ai-modelwarn { display: flex; gap: 7px; align-items: flex-start; margin: 0; padding: 7px 10px; border-radius: 8px; font-size: 12.5px; background: var(--warn-soft, #fff7e6); color: #92400e; border: 1px solid #f5dca6; }
:root[data-theme="dark"] .ai-modelwarn { background: #33270b; color: #fcd34d; border-color: #5c4712; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .ai-modelwarn { background: #33270b; color: #fcd34d; border-color: #5c4712; } }
.ai-modelwarn[hidden] { display: none; }
.ai-modelwarn .ai-i { width: 15px; height: 15px; margin-top: 2px; }
.ai-keynote {
  display: flex; gap: 9px; align-items: flex-start; margin: 6px 0 0; padding: 10px 12px; border-radius: 10px; font-size: 12.5px; line-height: 1.55;
  background: var(--bg-soft); color: var(--muted); border: 1px solid var(--line);
}
.ai-keynote .ai-i { color: var(--accent); margin-top: 1px; }
.ai-busy { position: fixed; inset: 0; z-index: 95; display: grid; place-items: center; background: color-mix(in srgb, var(--bg) 70%, transparent); backdrop-filter: blur(2px); }
.ai-busy-card { width: min(340px, calc(100% - 32px)); padding: 22px 22px 18px; border-radius: 16px; background: var(--bg); border: 1px solid var(--line); box-shadow: var(--shadow); text-align: center; }
.ai-busy-card p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.ai-toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 99; max-width: calc(100% - 32px);
  background: #1f2937; color: #fff; padding: 10px 16px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0, 0, 0, .28); font-size: 14px;
  font-family: var(--font); animation: ai-up .2s ease-out; transition: opacity .3s;
}
.ai-toast.bad { background: #9f1d14; }
.ai-toast.out { opacity: 0; }
@keyframes ai-up { from { opacity: 0; transform: translate(-50%, 8px); } }
body.ai-dragging.ai-page #ai-app::after {
  content: ""; position: absolute; inset: 8px; border: 3px dashed var(--accent); border-radius: 18px; background: var(--glow); pointer-events: none; z-index: 70;
}

/* ---------- narrow screens: one pane at a time ---------- */
@media (max-width: 1100px) {
  .ai-feats { grid-template-columns: repeat(2, 1fr); }
  .ai-bar .brand span { display: none; }
  .ai-closefile span { display: none; }
  .ai-closefile { width: 38px; padding: 0; }
  .ai-chip { max-width: 190px; }
}
@media (max-width: 860px) {
  .ai-mode-work .ai-bar { flex-wrap: wrap; gap: 8px; padding: 8px 10px; }
  .ai-bar .brand { display: none; }
  .ai-docname { flex: 1 1 0; }
  .ai-docname b { max-width: none; }
  .ai-bar-gap:first-of-type { display: none; }
  .ai-switch { display: inline-flex; order: 10; width: 100%; }
  .ai-switch button { flex: 1; justify-content: center; }
  .ai-chip { max-width: 150px; }
  .ai-bar .controls .lang .lang-word { display: none; }
  .ai-previewtoggle, .ai-view-x, .ai-showpreview { display: none !important; }
  #ai-app[data-preview="off"][data-view="doc"] .ai-view { display: flex; }
  .ai-tabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: thin; -webkit-overflow-scrolling: touch; }
  .ai-work { display: flex; flex-direction: column; }
  .ai-view, .ai-side { flex: 1; min-height: 0; }
  .ai-view { border-right: 0; }
  #ai-app[data-view="tools"] .ai-view { display: none; }
  #ai-app[data-view="doc"] .ai-side { display: none; }
  .ai-pages { padding: 12px; }
  .ai-panel { padding: 14px 14px 32px; }
  .ai-chat-log { max-height: none; }
  .ai-chat { min-height: 420px; }
}
@media (max-width: 720px) {
  .ai-feats { grid-template-columns: 1fr; }
  .ai-engines { grid-template-columns: 1fr; }
  .ai-hero h1 { font-size: 22px; }
  .ai-controls { grid-template-columns: 1fr; }
  .ai-controls .ai-seg + .ai-input { grid-column: 1; }
  .ai-chip-t { display: none; }
  .ai-chip { padding: 0 10px; }
  .ai-docname small { display: none; }
  .ai-out { padding: 4px 12px 12px; }
  .ai-mini[data-fmt="copy"] span { display: none; }
  .ai-mini { padding: 0 6px; }
  .ai-mini .ai-i { width: 13px; height: 13px; }
  .ai-docic, .ai-bar [data-act="pick"] { display: none; }
  .ai-chip .ai-i.sm { display: none; }
  .ai-flash { height: 230px; }
  .ai-save-btn span { display: none; }
  .ai-engine-strip { padding: 10px 12px; }
  .ai-hero .ai-hero-art { display: none; }
  .ai-controls .ai-seg { max-width: 100%; }
  .ai-dialog { padding: 16px 14px; }
}
@media (max-width: 400px) {
  .ai-mode-work .ai-bar { gap: 6px; padding: 6px 8px; }
  .ai-bar .controls { gap: 6px; }
  .ai-chip { padding: 0 8px; }
  .ai-panel { padding: 12px 10px 28px; }
  .ai-tab { padding: 0 10px; }
}
@media print {
  body.ai-page { overflow: visible; height: auto; }
  .ai-bar, .ai-view, .ai-tabs, .ai-controls, .ai-engine-row, .ai-out-head, .ai-chat-tools, .ai-save { display: none !important; }
  .ai-work { display: block; }
  .ai-panel { overflow: visible; }
}