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.ghost{min-width:28px;font-size:15px;line-height:1}.zoom-controls .ghost:disabled{opacity:.35;cursor:default}.zoom-level{width:4ch;padding:2px 0;text-align:right;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;background:none;border:1px solid transparent;border-radius:4px}.zoom-level:hover{border-color:var(--line)}.zoom-level:focus{border-color:var(--muted);color:var(--ink)}.zoom-unit{font-size:13px;color:var(--muted);margin-right:2px}.pdf{display:flex;flex-direction:column;gap:1.5rem;align-items:center;align-items:safe center}.pdf-page{position:relative;border:1px solid var(--line);background:#fff}.pdf-canvas{position:absolute;top:0;right:0;bottom:0;left:0;display:block;width:100%;height:100%}.pdf-text{position:absolute;top:0;left:0;transform-origin:0 0;color:transparent}.pdf-text .doc-run{position:absolute;white-space:pre;margin:0;line-height:1}.pdf-text ::selection{background:#185fa540}.highlights,.rail{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.highlight{position:absolute;border:0;border-radius:2px;padding:0;background:#185fa524;pointer-events:auto;cursor:pointer}.highlight:hover,.highlight.is-active{background:#185fa547}.highlight.is-region{background:#185fa50a;border:2px solid rgba(24,95,165,.55);border-radius:3px}.highlight.is-region:hover,.highlight.is-region.is-active{background:#185fa51a;border-color:var(--accent)}.rail{left:auto;width:48px}.rail-marker{position:absolute;left:14px;width:20px;height:20px;padding:0;transform:translateY(-50%);border:1px solid var(--accent);border-radius:50%;background:var(--accent-bg);pointer-events:auto;cursor:pointer}.rail-marker:hover,.rail-marker.is-active{background:var(--accent)}.rail-marker.is-region{border-radius:3px}.rail-marker.is-resolved{border-color:var(--line);background:transparent}.rail-marker.is-orphaned{border-color:var(--danger);border-style:dashed}.reader-grid{display:grid;grid-template-areas:"spine paper margin thread";grid-template-columns:0 minmax(0,1fr) 48px 0;flex-grow:1;flex-shrink:1;flex-basis:0;min-height:0;transition:grid-template-columns .42s cubic-bezier(.4,0,.2,1)}.reader-grid[data-state=thread]{grid-template-columns:0 minmax(0,1fr) 0 var(--thread-width, 340px)}.reader-grid[data-state=expanded]{grid-template-columns:168px 0 0 minmax(0,1fr)}.reader-paper{grid-area:paper;display:flex;flex-direction:column;min-height:0}.region-error{margin:0 12px 8px;flex:none}.reader-scroll{position:relative;flex:1;min-height:0;overflow:auto}.reader-margin{grid-area:margin;position:relative;overflow:hidden}.reader-spine{grid-area:spine;overflow:auto;border-right:1px solid var(--line)}.reader-thread{grid-area:thread;overflow:hidden;border-left:1px solid var(--line)}.reader-grid[data-state=reading] .reader-thread,.reader-grid[data-state=expanded] .reader-paper{visibility:hidden}.thread-resizer{grid-area:thread;justify-self:start;align-self:stretch;position:relative;z-index:1;width:9px;margin-left:-4px;cursor:col-resize;background:transparent;border:0;padding:0}.thread-resizer:hover{background:var(--accent-bg)}.thread-resizer:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.reader-grid[data-resizing=true]{transition:none;-webkit-user-select:none;user-select:none;cursor:col-resize}.thread{display:flex;flex-direction:column;height:100%;padding:12px 16px;gap:10px}.thread-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.thread-controls .spacer{flex:1}.thread-controls .model select{max-width:11em;font-size:13px}.pill{border-radius:999px;padding:3px 10px;font-size:13px}.pill.is-on{background:var(--accent-bg);border-color:var(--accent);color:var(--accent)}.ghost{border:0;padding:4px 8px;font-size:13px;color:var(--muted)}.ghost:hover{color:var(--ink)}.anchor-quote{margin:0;padding:6px 10px;font-size:13px;line-height:1.5;border-left:2px solid var(--accent);background:var(--accent-bg);color:var(--ink)}.anchor-crop{display:block;max-width:100%;max-height:220px;object-fit:contain;border:1px solid var(--line);border-radius:4px;background:#fff}.anchor-crop-missing{margin:0;font-size:13px}.messages{flex:1;min-height:0;overflow:auto;display:flex;flex-direction:column;gap:8px}.msg{margin:0;padding:8px 10px;border-radius:8px;font-size:14px;line-height:1.55;overflow-wrap:anywhere}.msg.is-user{background:#f3f1ec}.msg.is-assistant{background:transparent;padding-left:0}.msg.is-partial>:last-child:after{content:"▍";color:var(--muted)}.msg-cost{margin:2px 0 0;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}.msg .msg-cost{margin-bottom:0}.msg>:first-child{margin-top:0}.msg>:last-child{margin-bottom:0}.msg p{margin:0 0 .6em}.msg h1,.msg h2,.msg h3,.msg h4,.msg h5,.msg h6{margin:1em 0 .4em;line-height:1.3;font-weight:600}.msg h1{font-size:16px}.msg h2{font-size:15px}.msg h3,.msg h4,.msg h5,.msg h6{font-size:14px}.msg ul,.msg ol{margin:0 0 .6em;padding-left:1.4em}.msg li{margin:.15em 0}.msg blockquote{margin:0 0 .6em;padding:0 0 0 10px;border-left:2px solid var(--line);color:var(--muted)}.msg a{color:var(--accent)}.msg code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em;background:#f3f1ec;border-radius:4px;padding:1px 4px}.msg pre{margin:0 0 .6em;padding:8px 10px;background:#f3f1ec;border-radius:6px;overflow-x:auto;overflow-wrap:normal}.msg pre code{background:none;padding:0;white-space:pre}.msg table{display:block;width:max-content;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:0 0 .6em;font-size:13px}.msg th,.msg td{border:1px solid var(--line);padding:3px 7px;text-align:left}.msg .katex-display{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:2px 0;margin:0 0 .6em}.msg .katex{overflow-wrap:normal}.msg .katex-error{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}.msg img{max-width:100%}.msg hr{border:0;border-top:1px solid var(--line);margin:.8em 0}.warn{margin:0;font-size:13px;color:#854f0b}.error .retry{margin-left:8px;color:var(--danger);text-decoration:underline}.composer{display:flex;gap:8px;align-items:flex-end}.composer textarea{flex:1;resize:vertical;padding:8px;border:1px solid var(--line);border-radius:6px}.spine{padding:12px 8px;display:flex;flex-direction:column;gap:2px}.spine-back{border:0;text-align:left;font-size:12px;color:var(--muted);padding:4px 8px}.spine-item{display:flex;justify-content:space-between;align-items:center;gap:6px;border:0;border-left:2px solid transparent;border-radius:0;text-align:left;font-size:12px;color:var(--muted);padding:5px 8px}.spine-item:hover{color:var(--ink)}.spine-item.is-active{color:var(--accent);border-left-color:var(--accent)}.spine-count{font-size:11px;min-width:16px;text-align:center;border-radius:999px;background:var(--accent-bg);color:var(--accent);padding:0 5px}.spine-empty{font-size:12px;padding:4px 8px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}@media(prefers-reduced-motion:reduce){.reader-grid{transition:none}}@media(max-width:720px){.reader-grid,.reader-grid[data-state=thread],.reader-grid[data-state=expanded]{grid-template-columns:0 minmax(0,1fr) 0 0}.thread-resizer{display:none}.reader-grid[data-state=thread] .reader-thread,.reader-grid[data-state=expanded] .reader-thread{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10;background:var(--surface, #fbfbf9);visibility:visible;height:100vh;height:100dvh;padding-bottom:env(safe-area-inset-bottom,0px)}}.gate form{display:grid;gap:1.25rem}.gate .field{display:grid;gap:.35rem}.gate .field label{font-size:13px}.gate .field input{padding:8px 10px;border:1px solid var(--line);border-radius:6px;width:100%}.gate .field-primary label{font-weight:600;color:var(--ink)}.gate .field-secondary label{color:var(--muted)}.gate .field-secondary input{font-size:13px}.gate .hint{margin:.35rem 0 0;font-size:12px;color:var(--muted, #666)}.gate .error,.gate .warn{margin-top:.75rem}.gate .error .ghost,.gate .warn .ghost{margin-left:8px;text-decoration:underline;color:inherit}.warn-badge{margin-right:auto;font-size:12px;color:#854f0b;align-self:center}.affordance-layer{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.selection-affordance{position:absolute;z-index:8;pointer-events:auto;cursor:pointer;width:132px;padding:5px 10px;font-size:13px;line-height:1.2;text-align:center;white-space:nowrap;border:1px solid var(--accent);border-radius:6px;background:#fff;color:var(--accent);box-shadow:0 1px 4px #00000024}.selection-affordance:hover{background:var(--accent-bg)}.ghost.is-danger{color:var(--danger)}.ghost.is-danger:hover{color:var(--danger);text-decoration:underline}.confirm-delete{padding:8px 10px;font-size:13px;line-height:1.5;border:1px solid var(--danger);border-radius:6px}.confirm-delete p{margin:0 0 8px}.confirm-actions{display:flex;gap:8px;align-items:center}.confirm-actions .danger{border-color:var(--danger);background:var(--danger);color:#fff;padding:4px 10px;font-size:13px}.reader-scroll.is-region-mode{-webkit-user-select:none;user-select:none;cursor:crosshair}.region-tool{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.region-tool-button{display:inline-flex;align-items:center;gap:7px;padding:5px 11px;font-size:13px;line-height:1.2;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);cursor:pointer}.region-tool-button:hover:not([disabled]){border-color:var(--accent);color:var(--accent)}.region-tool-button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.region-tool-mark{width:10px;height:10px;flex:none;border:1px solid currentColor;border-right:0;border-bottom:0;opacity:.75}.mode-note{max-width:26ch;line-height:1.35}.region-tool button[disabled]{opacity:.5;cursor:not-allowed}.region-tool button[aria-pressed=true]{border-color:var(--accent);background:var(--accent-bg);color:var(--accent)}.figure-layer{position:absolute;top:0;right:0;bottom:0;left:0}.figure-mark{position:absolute;z-index:4;width:10px;height:10px;border:0 solid var(--muted);opacity:.7}.figure-mark.is-tl{border-top-width:1px;border-left-width:1px}.figure-mark.is-br{border-bottom-width:1px;border-right-width:1px}@media(prefers-reduced-motion:no-preference){.figure-mark{transition:opacity .12s ease}}.figure-outline{position:absolute;z-index:5;border:1px dashed var(--accent);border-radius:3px;background:#185fa50f}.figure-ask{position:absolute;z-index:6;margin:6px 0 0 6px;font-size:12px;line-height:1.2;white-space:nowrap;border:1px solid var(--accent);border-radius:6px;background:#fff;color:var(--accent);box-shadow:0 1px 4px #00000024;width:0;height:0;padding:0;overflow:hidden;opacity:0;border-width:0}.figure-ask.is-on{width:auto;height:auto;padding:4px 9px;overflow:visible;opacity:1;border-width:1px;cursor:pointer}.figure-ask:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.region-layer{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.region-marquee{position:absolute;z-index:7;border:1px dashed var(--accent);border-radius:2px;background:#185fa51a}.notice{margin:0 0 .75rem;font-size:13px;color:var(--muted)}.ways-in{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));margin:1.5rem 0 2rem}.way{display:flex;flex-direction:column;gap:.5rem;border:1px solid var(--line);border-radius:8px;padding:1rem 1.1rem;background:#fff}.way h2{margin:0;font-size:15px}.way p{margin:0;color:var(--muted);font-size:14px}.way-action{margin-top:auto;align-self:flex-start;display:inline-block;border:1px solid var(--line);border-radius:6px;padding:6px 12px;text-decoration:none;color:inherit;background:none}.way-action:hover{border-color:var(--muted)}.gate h2{font-size:15px;margin:1.5rem 0 .5rem}.credit-bar{display:flex;align-items:center;gap:.6rem;margin-right:auto;font-size:12px;color:var(--muted)}.credit-bar-track{width:7rem;height:6px;border-radius:999px;background:var(--line);overflow:hidden}.credit-bar-fill{display:block;height:100%;width:var(--credit-fill, 0%);background:var(--accent)}.account{position:relative}.account-button{font-size:13px}.account-menu{position:absolute;right:0;top:calc(100% + 6px);z-index:20;display:grid;gap:.4rem;justify-items:start;min-width:13rem;border:1px solid var(--line);border-radius:8px;padding:.75rem;background:#fff;box-shadow:0 6px 20px #00000014}.account-who{margin:0;font-size:13px}.account-email{margin:0;font-size:12px;color:var(--muted)}.account-balance{margin:0 0 .25rem;font-size:13px}.app-notice{margin:.5rem 1.5rem 0;font-size:13px}.app-notice .ghost{margin-left:8px;text-decoration:underline}.pill-note{color:var(--muted);font-size:.9em}.demo{max-width:68ch;margin:0 auto;padding:2rem 1.5rem}.demo-nav{display:flex;align-items:center;gap:1rem;margin-bottom:.5rem}.demo-allowance{margin-left:auto;font-size:12px;color:var(--muted)}.demo-credit{font-size:12px;color:var(--muted);margin:0 0 1.5rem}.demo-ask{display:grid;gap:.5rem;margin-top:1.5rem}.demo-ask label{font-size:13px;color:var(--muted)}.demo-ask textarea{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:6px;resize:vertical}.demo-ask button[type=submit]{justify-self:start}.demo-answer{margin-top:1rem}.topup{margin:.5rem 1.5rem 0;padding:.75rem 1rem;border:1px solid var(--line);border-radius:8px;max-width:42ch}.topup-lead,.topup-loading{margin:0 0 .75rem;font-size:13px;color:var(--muted)}.topup-amounts{display:flex;gap:.5rem;margin-bottom:.5rem}.topup-amount{font:inherit;padding:8px 14px;border:1px solid var(--line);border-radius:6px;background:none;cursor:pointer}.topup-amount:disabled{cursor:default;opacity:.6}.topup-amount-best{border-width:2px;font-weight:600}.topup-note{margin:0 0 .5rem;font-size:12px;color:var(--muted)}