:root{--bg: #0f1419;--panel: #161d25;--panel-2: #1c2530;--border: #2a3441;--text: #e6edf3;--muted: #8b98a5;--accent: #4f8cff;--accent-ink: #ffffff;--danger: #f85149;--radius: 10px}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}#app{height:100%}button{font:inherit;cursor:pointer}input,textarea{font:inherit;color:var(--text);background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius);padding:9px 12px;width:100%}input:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}.primary{background:var(--accent);color:var(--accent-ink);border:none;border-radius:var(--radius);padding:9px 16px;font-weight:600}.primary:hover{filter:brightness(1.1)}.ghost{background:transparent;color:var(--muted);border:1px solid var(--border);border-radius:var(--radius);padding:7px 12px}.ghost:hover{color:var(--text);border-color:var(--muted)}.logo{margin:0;font-size:28px;letter-spacing:.5px}.logo.small{font-size:18px}.tagline{color:var(--muted);margin:4px 0 18px}.hint{color:var(--muted);font-size:13px}.error{color:var(--danger);font-size:13px;margin:6px 0}.auth-wrap{min-height:100%;display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:360px;background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:28px}.auth-card form{display:flex;flex-direction:column;gap:12px;margin-top:14px}.auth-card label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.tabs{display:flex;gap:6px}.tab{flex:1;background:transparent;color:var(--muted);border:1px solid var(--border);border-radius:var(--radius);padding:8px}.tab.active{background:var(--panel-2);color:var(--text);border-color:var(--accent)}.app{display:flex;height:100%}.sidebar{width:320px;min-width:260px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column}.side-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}.me{color:var(--muted);font-size:13px}.side-actions{display:flex;gap:8px;padding:12px 16px;border-bottom:1px solid var(--border)}.side-actions .primary{flex:1}.conv-list{flex:1;overflow-y:auto;padding:8px;display:flex;flex-direction:column;gap:2px}.side-empty{color:var(--muted);font-size:13px;text-align:center;padding:24px 8px}.conv{display:flex;align-items:center;justify-content:space-between;gap:8px;background:transparent;color:var(--text);border:none;border-radius:var(--radius);padding:10px 12px;text-align:left}.conv:hover{background:var(--panel-2)}.conv.active{background:var(--panel-2);outline:1px solid var(--border)}.conv-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-meta{display:flex;align-items:center;gap:8px;flex-shrink:0}.time{color:var(--muted);font-size:12px}.badge{background:var(--accent);color:var(--accent-ink);font-size:11px;font-weight:700;border-radius:999px;padding:2px 7px;min-width:20px;text-align:center}.main{flex:1;display:flex;flex-direction:column;min-width:0}.empty-state{margin:auto;text-align:center;color:var(--muted)}.conv-head{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid var(--border);background:var(--panel)}.conv-head h2{margin:0;font-size:17px}.members{color:var(--muted);font-size:12px}.msg-scroll{flex:1;overflow-y:auto;padding:16px 18px;position:relative}.msg-list{display:flex;flex-direction:column;gap:10px;max-width:860px;margin:0 auto}.load-older{align-self:center;background:transparent;color:var(--muted);border:1px dashed var(--border);border-radius:999px;padding:6px 14px;font-size:13px;margin-bottom:6px}.load-older:hover{color:var(--text)}.msg{max-width:70%;align-self:flex-start;background:var(--panel-2);border:1px solid var(--border);border-radius:12px 12px 12px 4px;padding:8px 12px}.msg.mine{align-self:flex-end;background:var(--accent);border-color:var(--accent);border-radius:12px 12px 4px}.msg-body{white-space:pre-wrap;overflow-wrap:anywhere}.msg-meta{margin-top:3px;font-size:11px;opacity:.65}.composer{display:flex;gap:8px;align-items:flex-end;padding:12px 18px;border-top:1px solid var(--border);background:var(--panel)}.composer textarea{resize:none;max-height:140px}.panel{padding:18px;max-width:560px;display:flex;flex-direction:column;gap:14px}.panel label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.kind-row{display:flex;gap:18px;color:var(--text);font-size:14px}.kind-row label{flex-direction:row;align-items:center;gap:7px}.kind-row input{width:auto}.picked{display:flex;flex-wrap:wrap;gap:6px}.chip{display:inline-flex;align-items:center;gap:4px;background:var(--panel-2);border:1px solid var(--border);border-radius:999px;padding:3px 10px;font-size:13px}.chip-x{background:none;border:none;color:var(--muted);padding:0 2px;font-size:14px}.chip-x:hover{color:var(--danger)}.results{display:flex;flex-wrap:wrap;gap:6px}.result{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:999px;padding:5px 12px;font-size:13px}.result:hover{border-color:var(--accent)}.result.picked{opacity:.45}.panel-actions{display:flex;justify-content:flex-end}.invite-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.invite-list li{display:flex;align-items:center;gap:12px;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px}.invite-list code{font-size:15px;letter-spacing:1px}#toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%) translateY(20px);background:var(--danger);color:#fff;border-radius:var(--radius);padding:10px 18px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50}#toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media (max-width: 640px){.app{flex-direction:column}.sidebar{width:100%;min-width:0;max-height:45%;border-right:none;border-bottom:1px solid var(--border)}.msg{max-width:85%}}