:root{--primary: #367FD9;--danger: #B91C1C;--ei: #D99036;--success: #2E9E5B;--accent: #1F8C99;--bg: #F4F6F9;--surface: #FFFFFF;--border: #E3E8EF;--text: #1F2733;--muted: #6B7785;--bubble-mine: #367FD9;--bubble-theirs: #EDF1F6;--radius: 12px;font-family:"Source Sans 3",Segoe UI,system-ui,sans-serif;color:var(--text)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg)}.center{height:100%;display:flex;align-items:center;justify-content:center;padding:24px;text-align:center}.muted{color:var(--muted)}.error-box{color:var(--danger);max-width:480px}.messenger{height:100%;display:grid;grid-template-columns:340px 1fr;background:var(--surface);overflow:hidden}.thread-pane{min-width:0;min-height:0;display:flex}.thread-placeholder{width:100%}.conv-list{border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}.conv-list-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}.new-btn{background:var(--primary);color:#fff;border:0;border-radius:8px;padding:6px 12px;font-weight:600;cursor:pointer}.conv-scroll{overflow-y:auto;flex:1}.empty{padding:24px 16px}.conv-item{display:flex;gap:12px;align-items:center;width:100%;padding:12px 16px;border:0;background:transparent;cursor:pointer;border-bottom:1px solid var(--border);text-align:left}.conv-item:hover{background:#f8fafc}.conv-item.active{background:#eaf2fc}.avatar{flex:0 0 auto;width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center}.avatar-pole{background:var(--primary);border-radius:12px}.conv-main{flex:1;min-width:0}.conv-top,.conv-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px}.conv-name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-time{font-size:12px;flex:0 0 auto}.conv-preview{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge{flex:0 0 auto;background:var(--success);color:#fff;font-size:12px;font-weight:700;min-width:20px;height:20px;border-radius:10px;padding:0 6px;display:flex;align-items:center;justify-content:center}.thread{display:flex;flex-direction:column;flex:1;min-width:0;min-height:0}.thread-header{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--border)}.thread-title{display:flex;flex-direction:column;line-height:1.2}.thread-title .muted{font-size:13px}.back-btn{display:none;border:0;background:transparent;font-size:22px;cursor:pointer;color:var(--primary)}.thread-body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:6px;background:var(--bg)}.load-older{align-self:center;margin-bottom:8px;border:1px solid var(--border);background:var(--surface);border-radius:16px;padding:6px 14px;cursor:pointer;color:var(--muted)}.bubble-row{display:flex}.bubble-row.mine{justify-content:flex-end}.bubble{max-width:min(560px,78%);border-radius:var(--radius);padding:8px 12px}.bubble-mine{background:var(--bubble-mine);color:#fff;border-bottom-right-radius:4px}.bubble-theirs{background:var(--bubble-theirs);color:var(--text);border-bottom-left-radius:4px}.bubble.optimistic{opacity:.65}.bubble-body{white-space:pre-wrap;word-break:break-word}.bubble-meta{font-size:11px;opacity:.75;margin-top:4px;text-align:right}.bubble-atts{display:flex;flex-direction:column;gap:6px;margin-bottom:4px}.att{display:block;border-radius:8px;overflow:hidden}.att-image img{display:block;max-width:260px;max-height:260px;border-radius:8px;cursor:pointer}.att-video video,.att-audio audio{max-width:280px;width:100%;border-radius:8px}.att-video{position:relative}.att-badge{position:absolute;bottom:6px;right:6px;background:#0009;color:#fff;font-size:11px;padding:1px 6px;border-radius:8px}.att-duration{font-size:12px;color:var(--muted);margin-left:8px}.att-loading{padding:12px;color:var(--muted)}.att-pdf{display:flex;align-items:center;gap:10px;background:#ffffff26;padding:8px}.bubble-theirs .att-pdf{background:#fff}.att-pdf-icon{background:var(--danger);color:#fff;font-weight:700;font-size:12px;padding:8px;border-radius:6px}.att-pdf-meta{display:flex;flex-direction:column;font-size:14px}.readonly-banner{border-top:1px solid var(--border);background:#fbf6ec;color:#8a5a1a;padding:12px 16px;font-size:14px;text-align:center}.composer{border-top:1px solid var(--border);padding:10px 12px;background:var(--surface)}.composer-err{background:#fdecec;color:var(--danger);padding:6px 10px;border-radius:8px;margin-bottom:8px;font-size:14px;cursor:pointer}.composer-files{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.chip{background:var(--bubble-theirs);border-radius:16px;padding:4px 10px;font-size:13px;display:inline-flex;gap:6px;align-items:center}.chip button{border:0;background:transparent;cursor:pointer;font-size:16px;line-height:1}.composer-row{display:flex;align-items:flex-end;gap:8px}.icon-btn{border:0;background:transparent;font-size:20px;cursor:pointer;padding:6px}.composer-input{flex:1;resize:none;border:1px solid var(--border);border-radius:18px;padding:9px 14px;font:inherit;max-height:120px;min-height:38px}.composer-input:focus{outline:none;border-color:var(--primary)}.send-btn{background:var(--primary);color:#fff;border:0;border-radius:18px;padding:9px 16px;font-weight:600;cursor:pointer}.send-btn:disabled{opacity:.5;cursor:default}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#141e2d73;display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}.modal{background:var(--surface);border-radius:var(--radius);width:100%;max-width:420px;max-height:80vh;display:flex;flex-direction:column;overflow:hidden}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}.modal-search{margin:12px 16px;padding:9px 12px;border:1px solid var(--border);border-radius:8px;font:inherit}.modal-search:focus{outline:none;border-color:var(--primary)}.modal-list{overflow-y:auto;padding:0 8px 12px}.dir-item{display:flex;align-items:center;gap:12px;width:100%;border:0;background:transparent;padding:10px 8px;cursor:pointer;border-radius:8px;text-align:left}.dir-item:hover{background:#f8fafc}.dir-main{display:flex;flex-direction:column}.dir-main .muted{font-size:13px}.dev-login{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:10px;width:320px}.dev-login input{padding:9px 12px;border:1px solid var(--border);border-radius:8px;font:inherit}.dev-login h2{margin:0}.toast{position:fixed;bottom:16px;left:50%;transform:translate(-50%);background:var(--danger);color:#fff;padding:10px 16px;border-radius:8px;z-index:60;cursor:pointer;max-width:90%}@media (max-width: 720px){.messenger{grid-template-columns:1fr}.thread-pane,.messenger.has-active .conv-list{display:none}.messenger.has-active .thread-pane{display:flex}.back-btn{display:block}}