.auth-page{justify-content:center;align-items:center;height:100vh;display:flex}.auth-form{background:var(--surface);border-radius:var(--radius);flex-direction:column;gap:1rem;width:100%;max-width:360px;padding:2rem;display:flex}.auth-form h1{text-align:center;color:var(--accent)}.auth-form h2{text-align:center;font-size:1.1rem;font-weight:400}.auth-form input{background:var(--surface2);border-radius:var(--radius);border:1px solid #0000;outline:none;padding:.75rem;transition:border-color .2s}.auth-form input:focus{border-color:var(--accent)}.auth-form button{background:var(--accent);border-radius:var(--radius);cursor:pointer;border:none;padding:.75rem;font-weight:600}.auth-form .error{color:var(--accent);font-size:.9rem}.auth-form .link{text-align:center;color:var(--text-muted);font-size:.9rem}.app-layout{height:100vh;display:flex}.chat-list{background:var(--surface);border-right:1px solid var(--surface2);flex-direction:column;width:320px;min-width:320px;display:flex;overflow-y:auto}.chat-list-header{border-bottom:1px solid var(--surface2);justify-content:space-between;align-items:center;padding:1rem;display:flex}.chat-list-header h2{font-size:1.2rem}.chat-list-header button{background:var(--accent);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:1.2rem;display:flex}.create-chat{border-bottom:1px solid var(--surface2);flex-direction:column;gap:.5rem;padding:.5rem 1rem;display:flex}.create-chat input{background:var(--surface2);border-radius:var(--radius);box-sizing:border-box;border:none;width:100%;padding:.5rem}.create-chat>button{background:var(--accent);border-radius:var(--radius);cursor:pointer;border:none;width:100%;margin-top:.25rem;padding:.5rem 1rem}.user-search{position:relative}.user-search input{background:var(--surface2);border-radius:var(--radius);box-sizing:border-box;border:none;width:100%;padding:.5rem}.selected-users{flex-wrap:wrap;gap:.25rem;margin-top:.25rem;display:flex}.selected-user-tag{background:var(--accent);cursor:pointer;border-radius:12px;align-items:center;gap:.25rem;padding:.2rem .5rem;font-size:.8rem;display:inline-flex}.search-results{background:var(--surface);border:1px solid var(--surface2);border-radius:var(--radius);z-index:10;max-height:200px;position:absolute;top:100%;left:0;right:0;overflow-y:auto}.search-result-item{cursor:pointer;justify-content:space-between;align-items:center;padding:.5rem;display:flex}.search-result-item:hover{background:var(--surface2)}.search-result-username{color:var(--text-muted);font-size:.8rem}.chat-item{cursor:pointer;border-bottom:1px solid var(--surface2);padding:1rem;transition:background .15s}.chat-item:hover{background:var(--surface2)}.chat-item.active{background:var(--surface2);border-left:3px solid var(--accent)}.chat-item-name{margin-bottom:.25rem;font-weight:600}.chat-item-preview{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:.85rem;overflow:hidden}.chat-window{flex-direction:column;flex:1;display:flex}.chat-window-header{border-bottom:1px solid var(--surface2);align-items:center;gap:.75rem;padding:1rem;display:flex}.back-btn{cursor:pointer;background:0 0;border:none;font-size:1.2rem;display:none}.messages{flex-direction:column;flex:1;gap:.5rem;padding:1rem;display:flex;overflow-y:auto}.empty-state{color:var(--text-muted);flex:1;justify-content:center;align-items:center;display:flex}.message{border-radius:var(--radius);word-wrap:break-word;max-width:70%;padding:.5rem .75rem}.message.own{background:var(--accent);align-self:flex-end}.message.other{background:var(--surface2);align-self:flex-start}.message-time{color:var(--text-muted);text-align:right;margin-top:.25rem;font-size:.7rem}.message.own .message-time{color:#ffffffb3}.typing-indicator{color:var(--text-muted);padding:.25rem 0;font-size:.85rem}.message-input{border-top:1px solid var(--surface2);gap:.5rem;padding:1rem;display:flex}.message-input input{background:var(--surface2);border-radius:var(--radius);border:none;outline:none;flex:1;padding:.75rem}.message-input input:focus{border:1px solid var(--accent)}.message-input button{background:var(--accent);border-radius:var(--radius);cursor:pointer;border:none;padding:.75rem 1.5rem;font-weight:600}.message-input button:disabled{opacity:.5;cursor:default}.loading{height:100vh;color:var(--text-muted);justify-content:center;align-items:center;font-size:1.2rem;display:flex}@media (width<=768px){.chat-list{width:100%;min-width:100%}.chat-window-header .back-btn{display:block}.app-layout .empty-state{display:none}}:root{--bg:#1a1a2e;--surface:#16213e;--surface2:#0f3460;--accent:#e94560;--text:#eee;--text-muted:#999;--radius:8px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;overflow:hidden}#root{height:100vh}input,button{font:inherit;color:inherit}a{color:var(--accent)}