:root{--bg: #f5f6f8;--panel: #ffffff;--border: #e3e6ea;--text: #1d2024;--muted: #8a9099;--accent: #2f6df6;--accent-soft: #e9f0ff;--mine: #2f6df6;--radius: 12px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px}.centered{height:100%;display:flex;align-items:center;justify-content:center}.muted{color:var(--muted)}.small{font-size:13px}.pad{padding:12px}button{font:inherit;cursor:pointer;border:none;border-radius:8px;padding:10px 14px;background:var(--accent);color:#fff;transition:opacity .15s}button:hover{opacity:.9}button:disabled{opacity:.5;cursor:default}button.secondary{background:var(--accent-soft);color:var(--accent)}button.link{background:none;color:var(--accent);padding:6px}input{font:inherit;padding:10px 12px;border:1px solid var(--border);border-radius:8px;outline:none;background:#fff}input:focus{border-color:var(--accent)}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:0 4px 24px #0000000a}.auth-card{width:320px;display:flex;flex-direction:column;gap:10px}.brand{margin:0;font-size:28px;letter-spacing:-.5px}.brand-sm{font-weight:700;font-size:18px}.error{background:#fdecec;color:#c0392b;padding:8px 10px;border-radius:8px;font-size:13px}.app{display:flex;height:100%}.sidebar{width:280px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-head{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid var(--border)}.me-row{display:flex;gap:10px;align-items:center;padding:14px 16px}.actions{display:flex;gap:8px;padding:0 16px 12px}.actions button{flex:1}.avatar{width:36px;height:36px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0}.name{font-weight:600}.chat-list{flex:1;overflow-y:auto}.chat-item{width:100%;display:flex;align-items:center;gap:10px;background:none;color:var(--text);border-radius:0;padding:10px 16px;text-align:left}.chat-item:hover{background:var(--bg);opacity:1}.chat-item.active{background:var(--accent-soft)}.main{flex:1;display:flex;flex-direction:column;position:relative}.chat-head{padding:12px 16px;border-bottom:1px solid var(--border);font-weight:600;background:var(--panel);display:flex;align-items:center;justify-content:space-between;gap:12px}.call-inline{display:flex;align-items:center;gap:8px;font-weight:400;font-size:14px}.call-inline button{padding:7px 12px;font-size:14px}button.danger{background:#e7483b}.call-inline .dot{width:9px;height:9px;border-radius:50%;background:#2ecc71;display:inline-block;animation:pulse 1.4s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}.messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:8px}.msg{display:flex}.msg.mine{justify-content:flex-end}.bubble{max-width:70%;background:var(--panel);border:1px solid var(--border);padding:9px 13px;border-radius:14px}.msg.mine .bubble{background:var(--mine);color:#fff;border-color:var(--mine)}.edited{font-size:11px;opacity:.7}.composer{display:flex;gap:8px;padding:14px;border-top:1px solid var(--border);background:var(--panel)}.composer input{flex:1}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#00000026;display:flex;align-items:center;justify-content:center;z-index:5}.overlay .card{width:320px;max-height:70%;overflow-y:auto}.user-row{width:100%;display:flex;align-items:center;gap:10px;background:none;color:var(--text);padding:8px;text-align:left}.user-row:hover{background:var(--bg);opacity:1}.invite-code{font-family:monospace;font-size:18px;background:var(--bg);padding:12px;border-radius:8px;text-align:center;-webkit-user-select:all;user-select:all;margin:8px 0}