:root{--bg: #f4f5f7;--panel: #fff;--line: #e3e6ea;--ink: #1f2733;--muted: #6b7686;--brand: #2b6cff;--lead: #eef1f5;--bot: #eaf3ff;--agent: #dcf5e6;--warn: #b54708;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button{cursor:pointer;font:inherit}.login{min-height:100vh;display:grid;place-items:center}.login__card{background:var(--panel);padding:32px;border-radius:12px;width:320px;box-shadow:0 6px 30px #00000014;display:flex;flex-direction:column;gap:14px}.login__card h1{font-size:18px;margin:0 0 6px}.login__card label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}.login__card input{padding:9px 11px;border:1px solid var(--line);border-radius:7px;font-size:14px}.login__card button{padding:10px;background:var(--brand);color:#fff;border:0;border-radius:7px;font-weight:600}.login__error{color:#b42318;font-size:13px;margin:0}.app{height:100vh;display:flex;flex-direction:column}.app__bar{height:48px;display:flex;align-items:center;gap:12px;padding:0 16px;background:var(--panel);border-bottom:1px solid var(--line)}.app__brand{font-weight:700}.app__who{margin-left:auto;color:var(--muted);font-size:13px}.app__stale{color:var(--warn);font-style:normal}.app__signout{background:none;border:1px solid var(--line);border-radius:6px;padding:5px 10px}.app__body{flex:1;display:grid;grid-template-columns:240px 320px 1fr;min-height:0}.switcher{border-right:1px solid var(--line);background:var(--panel);overflow-y:auto;padding:10px}.switcher__search{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:7px;margin-bottom:8px}.switcher__list{list-style:none;margin:0;padding:0}.switcher__heading{font-size:11px;text-transform:uppercase;color:var(--muted);margin:10px 4px 4px}.switcher__row{display:flex;align-items:center;border-radius:7px}.switcher__row--active{background:#eef3ff}.switcher__name{flex:1;text-align:left;background:none;border:0;padding:8px;display:flex;align-items:center;gap:8px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.switcher__badge{margin-left:auto;background:var(--brand);color:#fff;border-radius:10px;font-size:11px;padding:1px 7px}.switcher__pin{background:none;border:0;color:#f0a800;padding:6px}.switcher__empty{color:var(--muted);font-size:13px;padding:14px 6px}.convlist{border-right:1px solid var(--line);background:var(--panel);overflow-y:auto}.convlist--state{padding:18px;color:var(--muted)}.convlist--error{color:#b42318}.convlist__lane{padding:8px 0}.convlist__lanehead{font-size:12px;text-transform:uppercase;color:var(--muted);padding:6px 12px;margin:0}.convlist__lanecount{color:var(--brand)}.convlist__empty{color:var(--muted);font-size:12px;padding:2px 12px 8px;margin:0}.convlist ul{list-style:none;margin:0;padding:0}.convlist__row{width:100%;text-align:left;background:none;border:0;border-bottom:1px solid var(--line);padding:11px 14px}.convlist__row:hover{background:#f7f9fc}.convlist__row--active{background:#eef3ff}.convlist__who{font-weight:600;font-size:14px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;display:block}.thread{display:flex;flex-direction:column;min-height:0;min-width:0;background:var(--bg)}.thread--empty,.thread__state{margin:auto;color:var(--muted);padding:24px}.thread__head{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--line)}.thread__title{font-weight:700;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.thread__presence{color:var(--muted);font-size:12px}.thread__continue{margin-left:auto;background:#0a7d33;color:#fff;border:0;border-radius:7px;padding:7px 12px;font-weight:600}.thread__bothandling{margin-left:auto;color:var(--muted);font-size:13px}.thread__banner{padding:8px 16px;font-size:13px}.thread__banner--stale{background:#fff4e5;color:var(--warn)}.thread__banner--paused{background:#e7f6ec;color:#0a7d33}.thread__messages{flex:1;min-width:0;overflow-y:auto;overflow-x:hidden;padding:16px;display:flex;flex-direction:column;gap:10px}.bubble{max-width:72%;padding:8px 12px;border-radius:12px;font-size:14px;overflow-wrap:anywhere;min-width:0}.bubble--left{align-self:flex-start;background:var(--lead)}.bubble--right{align-self:flex-end}.bubble--bot{background:var(--bot)}.bubble--agent{background:var(--agent)}.bubble--note{align-self:center;background:#fff4e5;color:var(--warn);font-size:12px;border:1px dashed #f0c79a;border-radius:8px;padding:6px 10px}.bubble__who{display:block;font-size:11px;color:var(--muted);margin-bottom:2px}.bubble__body{white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word}.bubble__body code,.bubble__body pre{white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;font-family:ui-monospace,SF Mono,Menlo,monospace}.bubble__body code{background:#0000000d;border-radius:4px;padding:1px 4px}.bubble__body pre{display:block;background:#0000000d;border-radius:6px;padding:8px;margin:4px 0;max-width:100%}.bubble__media{max-width:220px;border-radius:8px;margin-top:6px;display:block}.bubble__file{font-size:13px}.bubble__buttons{display:flex;flex-wrap:wrap;gap:4px;margin-top:6px}.bubble__btn{background:#2b6cff1f;color:var(--brand);border-radius:12px;font-size:12px;padding:2px 9px}.bubble__status{display:block;font-size:11px;color:var(--muted);margin-top:3px}.bubble__status--failed{color:#b42318}.reply{border-top:1px solid var(--line);background:var(--panel);padding:10px 16px}.reply__warn{font-size:12px;color:var(--warn);margin-bottom:6px}.reply__row{display:flex;gap:8px;align-items:flex-end}.reply__input{flex:1;resize:vertical;min-height:42px;max-height:160px;padding:10px;border:1px solid var(--line);border-radius:8px;font:inherit}.reply__send{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:10px 18px;font-weight:600}.reply__send:disabled{opacity:.5;cursor:default}