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var(--border-subtle)}.rail-kv:first-of-type{border-top:none;padding-top:0}.rail-k{color:var(--text-muted);font-size:12px}.rail-v{font-size:12px;font-weight:600;color:var(--text-primary)}.rail-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}.rail-list-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:12px;background:var(--canvas);border:1px solid var(--border-subtle);cursor:pointer;width:100%;text-align:left;color:inherit}.rail-list-item:hover{background:color-mix(in oklab,var(--canvas) 70%,var(--panel-solid));border-color:color-mix(in oklab,var(--primary) 18%,var(--border-subtle))}.rail-chip{font-size:11px;font-weight:600;padding:2px 8px;border-radius:999px;background:var(--primary-soft);color:var(--primary)}.rail-file{font-size:12px;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.page-title{font-size:22px;font-weight:600;margin:0 0 8px}.page-sub{color:var(--text-muted);margin:0 0 24px;font-size:14px}.kb-doc-delete{font:inherit;font-size:14px;color:inherit;background:none;border:none;padding:0;cursor:pointer;transition:color .15s ease,text-decoration-color .15s ease}.kb-doc-delete:hover:not(:disabled){color:var(--primary);text-decoration:underline;text-underline-offset:3px}.kb-doc-delete:disabled{cursor:not-allowed;opacity:.55}.card{background:var(--panel-solid);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-tight);padding:18px}.btn{border:none;border-radius:var(--radius-sm);padding:10px 16px;font-weight:600;cursor:pointer;font-family:inherit;transition:transform .12s ease,background .16s ease,border-color .16s ease,color .16s ease}.btn-primary{background:var(--primary);color:var(--on-primary)}.btn:active{transform:translateY(1px)}.btn-ghost{background:transparent;border:1px solid var(--border-subtle);color:var(--text-primary)}.btn-ghost:hover{background:var(--accent-soft)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.input,.textarea{width:100%;border-radius:var(--radius-sm);border:1px solid var(--border-subtle);padding:10px 12px;font-family:inherit;background:var(--panel-solid);color:var(--text-primary)}.textarea{min-height:100px;resize:vertical}.page{max-width:var(--content-max);margin:0 auto}.chat-page{height:100%;background:var(--chat-bg)}.chat-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid var(--chat-border);max-width:var(--chat-column-max);width:100%;margin-left:auto;margin-right:auto;box-sizing:border-box}.chat-title{font-size:18px;font-weight:600;margin:0}.chat-sub{color:var(--text-muted);margin-top:6px;font-size:13px}.chat-phase{color:var(--text-primary);font-weight:600}.chat-shell{background:var(--chat-bg);border:none;border-radius:0;box-shadow:none;overflow:visible;display:grid;grid-template-rows:minmax(0,1fr) auto;row-gap:20px;height:calc(100vh - 120px);max-width:var(--chat-column-max);width:100%;margin-left:auto;margin-right:auto;box-sizing:border-box}.chat-stream{padding:20px 16px;overflow:auto;position:relative;background:var(--chat-bg);box-sizing:border-box}.chat-jump-bottom{position:fixed;left:calc(var(--sidebar-w) + (100vw - var(--sidebar-w) - var(--rail-w)) / 2);transform:translate(-50%);bottom:calc(env(safe-area-inset-bottom,0px) + 130px);width:40px;height:40px;border-radius:999px;border:none;background:var(--chat-jump-bg);box-shadow:var(--chat-jump-shadow);color:var(--chat-jump-fg);cursor:pointer;display:grid;place-items:center;z-index:50;transition:transform .12s ease,background .16s ease,box-shadow .18s ease;line-height:1;pointer-events:auto}.chat-jump-bottom:hover{background:color-mix(in oklab,var(--chat-jump-bg) 94%,var(--chat-border));box-shadow:var(--chat-jump-shadow-hover)}.chat-jump-bottom:focus-visible{outline:2px solid color-mix(in oklab,var(--primary) 55%,transparent);outline-offset:3px}.chat-jump-bottom:active{transform:translate(-50%) translateY(1px)}.chat-empty{border:1px dashed var(--chat-border);background:transparent;border-radius:10px;padding:18px 16px;margin-bottom:14px}.chat-empty-title{font-weight:600;margin-bottom:6px}.chat-empty-sub{color:var(--text-muted);font-size:13px;line-height:1.55}.bubble{max-width:720px;padding:10px 12px;border-radius:14px;margin-bottom:10px;border:1px solid var(--border-subtle);line-height:1.6;font-size:14px}.bubble-inner{white-space:pre-wrap;word-break:break-word}.bubble{background:var(--panel-solid)}.bubble.user{margin-left:auto;background:var(--primary-soft);border-color:color-mix(in oklab,var(--primary) 22%,var(--border-subtle))}.bubble.assistant{background:var(--panel-solid)}.tool-block{margin-top:8px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:12px;background:var(--canvas);padding:8px;border-radius:var(--radius-sm);white-space:pre-wrap}.flow-wrap{height:520px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);overflow:hidden}.chat-composer{position:relative;z-index:1;border-top:none;background:transparent;padding:10px 16px 14px;box-sizing:border-box}.composer-wrap{display:block;width:100%}.composer-box{position:relative;display:flex;flex-direction:row;align-items:center;gap:0;padding:0 48px 0 12px;box-sizing:border-box;min-height:70px;background:var(--chat-surface);border:1px solid color-mix(in oklab,var(--primary) 24%,var(--chat-input-border));border-radius:16px;box-shadow:0 0 8px color-mix(in oklab,var(--primary) 16%,transparent);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}.composer-box:focus-within{border-color:color-mix(in oklab,var(--primary) 38%,var(--chat-input-border));box-shadow:0 0 14px color-mix(in oklab,var(--primary) 22%,transparent)}.composer-textarea{position:relative;z-index:2;flex:1 1 auto;align-self:stretch;width:100%;min-width:0;min-height:0;resize:none;border-radius:0;border:none;padding:12px 8px 12px 20px;margin:0;font-family:inherit;background:var(--chat-surface);color:var(--chat-text-ai);font-size:15px;line-height:1.65;max-height:200px;overflow:auto;outline:none;text-align:left;box-shadow:none;transition:opacity .2s ease}.composer-textarea:focus{outline:none;box-shadow:none}.composer-textarea::placeholder{color:var(--chat-placeholder);font-size:15px}.composer-send{position:absolute;z-index:3;top:50%;right:12px;transform:translateY(-50%);width:32px;height:32px;border-radius:999px;border:none;background:var(--primary);color:var(--on-primary);display:grid;place-items:center;cursor:pointer;opacity:1;transition:opacity .12s ease}.composer-send:hover{opacity:.9}.composer-send:disabled{background:color-mix(in oklab,var(--chat-input-border) 60%,transparent);cursor:not-allowed;opacity:1}.composer-stop{position:absolute;z-index:3;top:50%;right:12px;transform:translateY(-50%);width:32px;height:32px;border-radius:999px;background:var(--chat-surface);color:var(--chat-jump-fg);border:1px solid var(--chat-input-border);display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none}.composer-stop:disabled{opacity:0;pointer-events:none}.composer-box:has(.composer-textarea:disabled) .composer-send{opacity:0;pointer-events:none}.composer-box:has(.composer-textarea:disabled) .composer-stop{opacity:1;pointer-events:auto}.composer-hint{margin-top:8px;color:var(--text-muted);font-size:13px}@media(max-width:1100px){.app-shell{grid-template-columns:var(--sidebar-w) minmax(0,1fr)}.right-rail{display:none}.chat-jump-bottom{left:calc(var(--sidebar-w) + (100vw - var(--sidebar-w)) / 2)}}@media(max-width:860px){.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto;border-right:none;border-bottom:1px solid var(--border-subtle)}.main-area{padding:16px 14px 22px}.chat-jump-bottom{bottom:calc(env(safe-area-inset-bottom,0px) + 126px);left:50%}.page{max-width:100%}.chat-shell{height:calc(100vh - 220px)}.chat-stream,.chat-composer{padding-left:12px;padding-right:12px}}