:root{--bg:#0b0d12;--bg-elev:#151821;--bg-elev2:#1c2030;--primary:#5865f2;--primary-2:#4752c4;--text:#e8eaf0;--text-dim:#9aa0b0;--border:#262b3a;--read:#53bdeb;--danger:#ed4245;--bubble-mine:#5865f2;--bubble-other:#232838}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}button{cursor:pointer}button,input{font-family:inherit}.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{width:100%;max-width:400px;background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:28px}.logo{font-size:44px;margin-bottom:4px}.logo,.title{text-align:center}.title{font-size:24px;font-weight:700;margin:0}.subtitle{text-align:center;color:var(--text-dim);margin:4px 0 20px}.field{width:100%;margin-bottom:12px}.field input{width:100%;padding:12px 14px;background:var(--bg-elev2);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:15px;outline:none}.field input:focus{border-color:var(--primary)}.btn{width:100%;padding:12px;background:var(--primary);color:#fff;border:none;border-radius:10px;font-size:16px;font-weight:600;transition:background .15s}.btn:hover{background:var(--primary-2)}.btn:disabled{opacity:.6;cursor:default}.btn-link{width:100%;background:none;border:none;color:var(--primary);padding:12px;font-size:14px}.error{color:var(--danger);font-size:14px;margin:8px 0;text-align:center}.server-hint{color:var(--text-dim);font-size:12px;text-align:center;margin-top:14px}.app{display:flex;height:100vh;overflow:hidden}.sidebar{width:320px;min-width:260px;background:var(--bg-elev);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-head{display:flex;align-items:center;gap:8px;padding:14px 16px;border-bottom:1px solid var(--border)}.sidebar-head h1{font-size:18px;margin:0;flex:1 1}.icon-btn{background:var(--bg-elev2);border:1px solid var(--border);color:var(--text);width:34px;height:34px;border-radius:8px;font-size:16px;display:flex;align-items:center;justify-content:center}.icon-btn:hover{border-color:var(--primary)}.conv-list{flex:1 1;overflow-y:auto}.conv{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border);cursor:pointer}.conv.active,.conv:hover{background:var(--bg-elev2)}.avatar{width:42px;height:42px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0}.conv-body{min-width:0;flex:1 1}.conv-title{font-weight:600}.conv-last{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-last,.empty{color:var(--text-dim)}.empty{text-align:center;padding:40px 20px}.chat{flex:1 1;display:flex;flex-direction:column;min-width:0}.chat-head{padding:14px 18px;border-bottom:1px solid var(--border);font-weight:600;display:flex;align-items:center;gap:10px}.messages{flex:1 1;overflow-y:auto;padding:16px;flex-direction:column;gap:6px}.messages,.row{display:flex}.row.mine{justify-content:flex-end}.bubble{max-width:72%;padding:8px 12px;border-radius:14px;background:var(--bubble-other);word-wrap:break-word;white-space:pre-wrap}.row.mine .bubble{background:var(--bubble-mine);border-bottom-right-radius:4px}.row:not(.mine) .bubble{border-bottom-left-radius:4px}.bubble .who{font-size:11px;font-weight:700;color:var(--read);margin-bottom:2px}.bubble .meta{font-size:10px;color:hsla(0,0%,100%,.6);margin-top:3px;display:flex;gap:4px;justify-content:flex-end;align-items:center}.check{font-weight:700}.check.read{color:var(--read)}.composer{display:flex;gap:8px;padding:12px 16px;border-top:1px solid var(--border)}.composer input{flex:1 1;padding:12px 16px;background:var(--bg-elev2);border:1px solid var(--border);border-radius:24px;color:var(--text);font-size:15px;outline:none}.composer input:focus{border-color:var(--primary)}.send-btn{width:46px;height:46px;border-radius:50%;background:var(--primary);border:none;color:#fff;font-size:18px}.send-btn:hover{background:var(--primary-2)}.chat-empty{flex:1 1;color:var(--text-dim)}.chat-empty,.overlay{display:flex;align-items:center;justify-content:center}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:50;padding:20px}.dialog{width:100%;max-width:440px;background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;padding:20px;max-height:80vh;display:flex;flex-direction:column}.dialog h2{margin:0 0 14px;font-size:18px}.dialog .field input{margin-bottom:10px}.result-list{overflow-y:auto;flex:1 1;margin:6px 0}.result{display:flex;align-items:center;gap:10px;padding:10px;border-radius:8px;cursor:pointer}.result:hover{background:var(--bg-elev2)}.result .avatar{width:36px;height:36px;font-size:14px}.result-name{flex:1 1}.result-username{color:var(--text-dim);font-size:12px}.dialog-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:10px}.chips{flex-wrap:wrap;margin-bottom:10px}.chip,.chips{display:flex;gap:6px}.chip{background:var(--primary);color:#fff;padding:4px 10px;border-radius:20px;font-size:13px;align-items:center}.chip button{background:none;border:none;color:#fff;font-size:14px;line-height:1}.checkbox{margin-left:auto}@media (max-width:720px){.sidebar{width:100%}.app.has-active .sidebar,.app:not(.has-active) .chat{display:none}}