.tool{display:grid;grid-template-columns:304px minmax(0,1fr) 408px;grid-gap:1px;gap:1px;height:calc(100dvh - 62px);background:var(--line-soft);overflow:hidden}.rail,.reader,.thread-pane{display:grid;grid-template-rows:auto minmax(0,1fr) auto;min-height:0;background:var(--desk)}.reader{grid-template-rows:auto minmax(0,1fr)}.pane-head{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-xs);height:46px;padding-inline:var(--sp-sm);border-bottom:1px solid var(--line-soft)}.rail-list{display:grid;align-content:start;grid-gap:var(--sp-2xs);gap:var(--sp-2xs);padding:var(--sp-xs);overflow-y:auto}.src{display:grid;grid-gap:6px;gap:6px;padding:12px;border:1px solid var(--line-soft);border-radius:var(--r-md);background:var(--desk-raised);text-align:left;transition:border-color .16s var(--ease),background .16s var(--ease)}.src:hover{border-color:var(--line-strong)}.src-active,.src:hover{background:var(--desk-panel)}.src-active{border-color:var(--cobalt-quiet)}.src-tag{color:var(--ink-faint)}.src-active .src-tag{color:var(--cobalt-lift)}.src-title{font-size:var(--fs-sm);font-weight:550;line-height:1.3}.src-meta{color:var(--ink-low);font-size:var(--fs-xs)}.rail-foot{padding:var(--sp-xs);border-top:1px solid var(--line-soft)}.rail-actions{display:flex;flex-wrap:wrap;gap:6px}.thread{align-content:start;padding:var(--sp-md) clamp(16px,3vw,40px);overflow-y:auto;scroll-behavior:smooth}.thread,.thread-empty{display:grid;grid-gap:var(--sp-sm);gap:var(--sp-sm)}.thread-empty{padding-block:var(--sp-md)}.prompts{display:grid;grid-gap:8px;gap:8px;max-width:60ch}.prompt{padding:12px 14px;border:1px solid var(--line-soft);border-radius:var(--r-md);background:var(--desk-raised);color:var(--ink-mid);font-size:var(--fs-sm);text-align:left;transition:color .16s var(--ease),border-color .16s var(--ease)}.prompt:hover{color:var(--ink-hi);border-color:var(--cobalt-quiet)}.said{justify-self:end;max-width:min(58ch,82%);padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--desk-inset)}.said p{margin-top:6px;font-size:var(--fs-sm)}.answer{display:grid;grid-gap:var(--sp-xs);gap:var(--sp-xs);max-width:74ch;padding:var(--sp-sm) var(--sp-md) var(--sp-md);border:1px solid var(--line);border-radius:var(--r-md);background:var(--desk-raised)}.answer-pending{opacity:.72}.answer-head{display:flex;justify-content:space-between;padding-bottom:var(--sp-2xs);border-bottom:1px solid var(--line-soft)}.answer-head,.answer-meta{align-items:center;gap:var(--sp-xs);flex-wrap:wrap}.answer-meta{display:inline-flex}.answer-summary{font-size:1rem;line-height:1.62}.answer-points{display:grid;grid-gap:10px;gap:10px}.answer-points li{display:grid;grid-template-columns:14px minmax(0,1fr);grid-gap:var(--sp-2xs);gap:var(--sp-2xs);color:var(--ink-mid);font-size:var(--fs-sm);line-height:1.58}.answer-points li:before{content:"";width:9px;height:1px;margin-top:.72em;background:var(--ink-faint)}.next,.watch{display:grid;grid-gap:6px;gap:6px;padding:12px 14px;border:1px solid var(--line-soft);border-radius:var(--r-md)}.watch{border-color:color-mix(in oklab,var(--review) 32%,transparent);background:color-mix(in oklab,var(--review) 8%,transparent)}.watch .tag{color:var(--review)}.next p,.watch p{font-size:var(--fs-sm);line-height:1.55;color:var(--ink-mid)}.sources-strip{display:grid;grid-gap:8px;gap:8px;padding-top:var(--sp-2xs);border-top:1px solid var(--line-soft)}.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{display:inline-flex;align-items:center;gap:8px;padding:6px 10px 6px 6px;border:1px solid var(--line-soft);border-radius:var(--r-md);background:transparent;color:var(--ink-mid);font-size:var(--fs-xs);transition:color .16s var(--ease),border-color .16s var(--ease)}.chip:hover{color:var(--ink-hi);border-color:var(--cobalt-quiet)}.answer-actions{display:flex;gap:6px}.pending-note{color:var(--ink-faint);font-size:var(--fs-xs)}.composer{display:grid;grid-gap:var(--sp-2xs);gap:var(--sp-2xs);padding:var(--sp-xs) clamp(16px,3vw,40px) var(--sp-sm);border-top:1px solid var(--line-soft)}.composer-foot{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-xs)}.composer-hint{color:var(--ink-faint);font-size:var(--fs-xs)}.start textarea,.tool textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--desk-inset);color:var(--ink-hi);font-size:var(--fs-sm);line-height:1.55;resize:vertical}.start textarea::placeholder,.tool textarea::placeholder{color:var(--ink-faint)}.start textarea:focus-visible,.tool textarea:focus-visible{border-color:var(--cobalt-quiet);outline:none}.reader-scroll{padding:var(--sp-xs);overflow-y:auto}.reader-paper{overflow:hidden}.reader-meta{display:flex;flex-wrap:wrap;gap:6px var(--sp-xs);padding:8px 14px;border-bottom:1px solid var(--paper-rule);color:var(--paper-ink-mid);font-size:var(--fs-xs)}.reader-file{color:var(--paper-ink);font-weight:550}.reader-body{display:grid;grid-gap:10px;gap:10px}.doc-heading{margin-top:10px;font-family:var(--font-mono),monospace;font-size:var(--fs-tag);font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--paper-ink-mid)}.doc-heading:first-child{margin-top:0}.doc-line{font-size:.875rem;line-height:1.66}.doc-bullet{padding-left:16px;text-indent:-16px}.doc-bullet:before{content:"— ";color:var(--paper-ink-mid)}.reader-close{display:none}.start{display:grid;place-items:center;min-height:calc(100dvh - 62px);padding:var(--sp-md)}.start-card{display:grid;grid-gap:var(--sp-sm);gap:var(--sp-sm);width:min(620px,100%);padding:clamp(24px,4vw,44px);border:1px solid var(--line);border-radius:var(--r-lg);background:var(--desk-raised)}.start-actions{display:flex;flex-wrap:wrap;gap:var(--sp-2xs);margin-top:var(--sp-2xs)}.start-foot{color:var(--ink-faint);font-size:var(--fs-xs);max-width:56ch}.paste{display:grid;grid-gap:8px;gap:8px}.paste textarea{min-height:132px}.paste-actions{display:flex;gap:6px}label.btn{position:relative;overflow:hidden}label.btn input[type=file]{position:absolute;inset:0;width:100%;opacity:0;cursor:pointer}.notice{position:fixed;left:var(--sp-sm);bottom:var(--sp-sm);z-index:60;padding:10px 14px;border:1px solid var(--line-strong);border-radius:var(--r-md);background:var(--desk-panel);color:var(--ink-hi);font-size:var(--fs-xs)}@media (max-width:1180px){.tool{grid-template-columns:272px minmax(0,1fr)}.reader{position:fixed;top:62px;right:0;bottom:0;z-index:50;width:min(440px,94vw);border-left:1px solid var(--line);transform:translateX(101%);transition:transform .26s var(--ease)}.reader-open .reader{transform:none}.reader-close{display:inline-flex}}@media (max-width:860px){.tool{grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr)}.rail{grid-template-rows:auto auto auto;max-height:40dvh}.rail-list{grid-auto-flow:column;grid-auto-columns:220px;overflow-x:auto}.said{max-width:92%}}