:root{--bg: #0f1117;--bg-soft: #171a23;--bg-panel: #1b1f2b;--border: #262b3a;--text: #e6e9f2;--text-dim: #9aa3b8;--accent: #4f8cff;--accent-soft: rgba(79, 140, 255, .15);--danger: #ff6b6b;--ok: #43d17c;--warn: #f5b942;--radius: 12px;--safe-bottom: env(safe-area-inset-bottom, 0px);--header-h: 56px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);overflow:hidden}button,textarea{font:inherit}.app{display:flex;flex-direction:column;height:100dvh;max-width:900px;margin:0 auto}.app-header{height:var(--header-h);flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px;border-bottom:1px solid var(--border);background:var(--bg-soft)}.brand{display:flex;align-items:center;gap:8px;min-width:0}.brand-name{font-weight:700;font-size:1rem;white-space:nowrap}.badge{font-size:.7rem;padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);border:1px solid rgba(79,140,255,.35);white-space:nowrap}.header-stats{display:flex;align-items:center;gap:8px;min-width:0}.stat{font-size:.75rem;color:var(--text-dim);white-space:nowrap}.status-chip{display:inline-flex;align-items:center;gap:6px;font-size:.75rem;padding:4px 10px;border-radius:999px;border:1px solid var(--border);background:var(--bg-panel);white-space:nowrap}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.status-connecting{background:var(--warn);box-shadow:0 0 6px var(--warn)}.status-connected{background:var(--ok);box-shadow:0 0 6px var(--ok)}.status-disconnected{background:var(--danger);box-shadow:0 0 6px var(--danger)}.icon-btn{background:var(--bg-panel);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:6px 10px;cursor:pointer;display:none}.app-body{flex:1 1 auto;min-height:0;display:flex;gap:0}.chat-area{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;position:relative}.messages{flex:1 1 auto;overflow-y:auto;overflow-x:hidden;padding:16px;display:flex;flex-direction:column;gap:10px;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}.empty-state{flex:1 1 auto;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-dim);text-align:center;gap:6px;padding:24px}.empty-state .empty-icon{font-size:2.5rem}.empty-state small{color:var(--text-dim)}.msg{max-width:85%;padding:8px 12px;border-radius:var(--radius);background:var(--bg-panel);border:1px solid var(--border);word-break:break-word;overflow-wrap:anywhere;animation:msg-in .12s ease-out}@keyframes msg-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.msg-own{align-self:flex-end;background:var(--accent-soft);border-color:#4f8cff66}.msg-other{align-self:flex-start}.msg-meta{display:flex;align-items:baseline;gap:8px;margin-bottom:2px}.msg-author{font-weight:600;font-size:.8rem}.msg-time{font-size:.68rem;color:var(--text-dim)}.msg-text{font-size:.92rem;line-height:1.4;white-space:pre-wrap}.scroll-btn{position:absolute;right:16px;bottom:12px;width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--bg-panel);color:var(--text);cursor:pointer;font-size:1.1rem;box-shadow:0 4px 14px #0006;z-index:5}.typing-bar{flex:0 0 auto;display:flex;align-items:center;gap:8px;padding:6px 16px;font-size:.78rem;color:var(--text-dim)}.typing-dot{width:8px;height:8px;border-radius:50%;display:inline-block;animation:typing-pulse 1s ease-in-out infinite}@keyframes typing-pulse{0%,to{opacity:.3}50%{opacity:1}}.user-panel{flex:0 0 220px;border-left:1px solid var(--border);background:var(--bg-soft);padding:12px;display:flex;flex-direction:column;gap:8px;overflow-y:auto}.panel-title{margin:0;font-size:.8rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em}.user-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.user-item{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:8px;background:var(--bg-panel);border:1px solid var(--border)}.user-dot{width:10px;height:10px;border-radius:50%;flex:0 0 auto}.user-name{flex:1 1 auto;font-size:.85rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.block-btn{flex:0 0 auto;font-size:.68rem;padding:3px 8px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--text-dim);cursor:pointer}.block-btn.blocked{color:var(--danger);border-color:#ff6b6b66}.user-empty{color:var(--text-dim);font-size:.8rem;list-style:none}.panel-note{font-size:.68rem;color:var(--text-dim);line-height:1.4}.error-banner{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 16px;background:#ff6b6b1f;border-top:1px solid rgba(255,107,107,.35);color:var(--danger);font-size:.82rem}.error-retry{background:transparent;border:1px solid var(--danger);color:var(--danger);border-radius:6px;padding:3px 10px;cursor:pointer}.identity-bar{flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:8px 16px;border-top:1px solid var(--border);background:var(--bg-soft);font-size:.82rem;color:var(--text-dim)}.identity-bar strong{color:var(--text);font-weight:600}.rename-hint{font-size:.7rem;color:var(--text-dim)}.rename-btn{margin-left:auto;background:var(--bg-panel);border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:8px;cursor:pointer;white-space:nowrap}.rename-btn:disabled{opacity:.45;cursor:not-allowed}.composer{flex:0 0 auto;display:flex;align-items:flex-end;gap:8px;padding:8px 16px calc(8px + var(--safe-bottom));border-top:1px solid var(--border);background:var(--bg-soft)}.chat-input{flex:1 1 auto;resize:none;max-height:120px;min-height:40px;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--bg-panel);color:var(--text);outline:none;font-size:.95rem;line-height:1.35}.chat-input:focus{border-color:var(--accent)}.chat-input::placeholder{color:var(--text-dim)}.send-btn{flex:0 0 auto;min-height:40px;min-width:64px;padding:10px 16px;border-radius:10px;border:none;background:var(--accent);color:#fff;font-weight:600;cursor:pointer}.send-btn:disabled{opacity:.45;cursor:not-allowed}.footer-actions{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 16px calc(6px + var(--safe-bottom));font-size:.7rem;color:var(--text-dim)}.text-btn{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:.7rem;padding:4px 0;text-decoration:underline}.text-btn:hover{color:var(--danger)}.toast{position:fixed;left:50%;transform:translate(-50%);bottom:calc(96px + var(--safe-bottom));background:#232838;color:var(--text);border:1px solid var(--border);padding:10px 16px;border-radius:10px;font-size:.82rem;z-index:50;opacity:0;transition:opacity .18s ease;pointer-events:none;max-width:calc(100vw - 32px);text-align:center}.toast.show{opacity:1}@media (max-width: 720px){.stat{display:none}.icon-btn{display:inline-block}.user-panel{position:fixed;top:var(--header-h);right:0;bottom:0;width:min(78vw,300px);z-index:40;transform:translate(105%);transition:transform .18s ease;border-left:1px solid var(--border);box-shadow:-8px 0 24px #00000073}.user-panel.open{transform:translate(0)}.msg{max-width:92%}.composer{padding:8px 10px calc(8px + var(--safe-bottom))}.identity-bar{padding:8px 10px}.footer-actions{padding:6px 10px calc(6px + var(--safe-bottom))}.footer-note{display:none}}