:root{--bg:#f1f3f7;--panel:#fff;--panel-hover:#f4f6fa;--active:#e7eeff;--border:#e3e6ec;--text:#1a1d24;--text-muted:#7a8190;--accent:#3d7bff;--accent-2:#8a4dff;--accent-hover:#2f67e0;--bubble-in:#fff;--bubble-out:#dbe7ff;--chat-bg:#eceff5;--danger:#e5484d;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,Segoe UI,Roboto,Arial,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--panel:#181b21;--panel-hover:#20242c;--active:#25304a;--border:#262a33;--text:#e8eaf0;--text-muted:#8b92a1;--bubble-in:#232730;--bubble-out:#2d4274;--chat-bg:#111318}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg)}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}a{color:var(--accent)}.btn-primary{background:var(--accent);color:#fff;border:0;border-radius:10px;padding:10px 16px;font-weight:600}.btn-primary:not(:disabled):hover{background:var(--accent-hover)}.icon-btn{width:38px;height:38px;color:var(--text-muted);background:0 0;border:0;border-radius:50%;place-items:center;display:inline-grid}.icon-btn:hover{background:var(--panel-hover);color:var(--accent)}.link-btn{color:var(--accent);background:0 0;border:0;padding:0}input,textarea{border:1px solid var(--border);background:var(--panel);border-radius:10px;outline:none;width:100%;padding:10px 12px}input:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent)}.form-error{color:var(--danger);margin:8px 0 0;font-size:13px}.login{background:radial-gradient(circle at 20% 10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 40%), radial-gradient(circle at 90% 90%, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent 40%), var(--bg);place-items:center;min-height:100%;padding:16px;display:grid}.login-card{background:var(--panel);border-radius:20px;flex-direction:column;gap:14px;width:100%;max-width:400px;padding:32px 28px;display:flex;box-shadow:0 10px 40px #00000014}.login-logo{justify-content:center;display:flex}.login-card h1{text-align:center;margin:0;font-size:22px}.login-hint{text-align:center;color:var(--text-muted);margin:0 0 6px;font-size:14px}.login-card label{color:var(--text-muted);flex-direction:column;gap:6px;font-size:13px;display:flex}.login-advanced summary{cursor:pointer;color:var(--text-muted);margin-bottom:8px;font-size:13px}.login-card .btn-primary{margin-top:6px;padding:12px}.demo-btn{font-size:14px}.app{grid-template-columns:360px 1fr;height:100%;display:grid}.sidebar{background:var(--panel);border-right:1px solid var(--border);flex-direction:column;min-height:0;display:flex}.sidebar-header{justify-content:space-between;align-items:center;padding:14px 14px 10px 18px;display:flex}.brand{align-items:center;gap:10px;font-size:20px;font-weight:700;display:flex}.brand svg{width:30px;height:30px}.new-chat{border-bottom:1px solid var(--border);padding:4px 14px 14px}.new-chat label{color:var(--text-muted);margin-bottom:6px;font-size:13px;display:block}.new-chat-row{gap:8px;display:flex}.banner-error{background:color-mix(in srgb, var(--danger) 12%, transparent);color:var(--danger);border-radius:10px;margin:8px 14px;padding:8px 12px;font-size:13px}.chat-list{flex:1;margin:0;padding:6px;list-style:none;overflow-y:auto}.chat-list-empty{color:var(--text-muted);text-align:center;padding:24px 12px;font-size:14px}.chat-item{text-align:left;background:0 0;border:0;border-radius:12px;align-items:center;gap:12px;width:100%;padding:10px;display:flex}.chat-item:hover{background:var(--panel-hover)}.chat-item.active{background:var(--active)}.chat-item-body{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.chat-item-top,.chat-item-bottom{justify-content:space-between;align-items:center;gap:8px;display:flex}.chat-item-title{text-overflow:ellipsis;white-space:nowrap;font-weight:600;overflow:hidden}.chat-item-time{color:var(--text-muted);flex-shrink:0;font-size:12px}.chat-item-preview{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;font-size:14px;overflow:hidden}.badge{background:var(--accent);color:#fff;border-radius:10px;place-items:center;min-width:20px;height:20px;padding:0 6px;font-size:12px;font-weight:600;display:grid}.sidebar-footer{border-top:1px solid var(--border);justify-content:space-between;align-items:center;padding:12px 18px;font-size:13px;display:flex}.instance{color:var(--text-muted)}.avatar{color:#fff;border-radius:50%;flex-shrink:0;place-items:center;font-size:15px;font-weight:600;display:grid}.chat{background:var(--chat-bg);flex-direction:column;min-width:0;min-height:0;display:flex}.chat-placeholder{color:var(--text-muted);justify-content:center;align-items:center}.chat-placeholder p{background:var(--panel);border-radius:20px;padding:8px 16px;font-size:14px}.chat-header{background:var(--panel);border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:10px 18px;display:flex}.back-btn{display:none}.chat-header-text{flex-direction:column;min-width:0;display:flex}.chat-header-title{font-weight:600}.chat-header-sub{color:var(--text-muted);font-size:13px}.messages{flex-direction:column;flex:1;gap:4px;padding:16px 8% 8px;display:flex;overflow-y:auto}.messages-empty{color:var(--text-muted);background:var(--panel);border-radius:20px;margin:auto;padding:8px 16px;font-size:14px}.date-divider{justify-content:center;margin:10px 0;display:flex}.date-divider span{color:var(--text-muted);background:var(--panel);border-radius:12px;padding:4px 12px;font-size:12px}.bubble-row{display:flex}.bubble-row.out{justify-content:flex-end}.bubble{background:var(--bubble-in);border-radius:18px;flex-wrap:wrap;align-items:flex-end;gap:4px 10px;max-width:min(560px,75%);padding:8px 12px 6px;display:flex;box-shadow:0 1px 1px #0000000d}.bubble.in{border-bottom-left-radius:6px}.bubble.out{background:var(--bubble-out);border-bottom-right-radius:6px}.bubble.failed{outline:1px solid var(--danger)}.bubble-text{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.4}.bubble-meta{color:var(--text-muted);gap:4px;margin-left:auto;font-size:11px;display:inline-flex}.status-read,.status-delivered{color:var(--accent)}.status-failed{color:var(--danger)}.composer{background:var(--chat-bg);align-items:flex-end;gap:10px;padding:12px 8%;display:flex}.composer textarea{resize:none;field-sizing:content;border-radius:22px;max-height:140px;padding:12px 18px}.send-btn{background:linear-gradient(135deg, var(--accent), var(--accent-2));color:#fff;border:0;border-radius:50%;flex-shrink:0;place-items:center;width:46px;height:46px;display:grid}@media (width<=760px){.app{grid-template-columns:1fr}.app .chat,.app.has-active-chat .sidebar{display:none}.app.has-active-chat .chat{display:flex}.back-btn{display:inline-grid}.chat-header{padding:8px 10px}.messages,.composer{padding-left:12px;padding-right:12px}}