body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}*{box-sizing:border-box;margin:0;padding:0}::-webkit-scrollbar{background:#0000;width:0}*{-ms-overflow-style:none;scrollbar-width:none}:root{--bg-primary:#f5f5f5;--bg-secondary:#fff;--bg-tertiary:#f9f9f9;--bg-header:#282c34;--text-primary:#333;--text-secondary:#555;--text-muted:#999;--border-color:#eee;--border-color-light:#ddd;--message-other:#e4e6eb;--message-own:#3498db;--hover-bg:#f0f0f0;--input-bg:#fff;--chat-header-bg:#fafafa}.dark-theme{--bg-primary:#1a1a2e;--bg-secondary:#16213e;--bg-tertiary:#0f3460;--bg-header:#0f0f1a;--text-primary:#e0e0e0;--text-secondary:#b0b0b0;--text-muted:#6b6b6b;--border-color:#2a2a4e;--border-color-light:#3a3a5e;--message-other:#2a2a4e;--message-own:#3498db;--hover-bg:#252550;--input-bg:#1f2940;--chat-header-bg:#141430}.App{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh}.App-header{align-items:center;background-color:#282c34;background-color:var(--bg-header);color:#fff;display:flex;justify-content:space-between;padding:15px 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.2s;width:28px}.remove-participant-btn:hover{background-color:#c0392b}.add-participant-btn{background-color:#fff;background-color:var(--bg-secondary);border:2px dashed #ddd;border:2px dashed var(--border-color-light);border-radius:4px;color:#333;color:var(--text-primary);cursor:pointer;font-size:.9rem;font-weight:500;padding:8px 16px;transition:all .2s;width:100%}.add-participant-btn:hover{background-color:#f0f0f0;background-color:var(--hover-bg);border-color:#3498db;color:#3498db}.chat-list{flex:1 1;overflow-y:auto;padding:15px}.chat-list h3{color:#333;color:var(--text-primary);font-size:1rem;margin-bottom:10px}.chat-list ul{list-style:none}.chat-list li{background-color:#fff;background-color:var(--bg-secondary);border:1px solid #eee;border:1px solid var(--border-color);border-radius:4px;color:#333;color:var(--text-primary);cursor:pointer;margin-bottom:5px;padding:12px;transition:background-color .2s}.chat-list 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1;font-size:1rem;min-width:0;padding:12px;width:0}.send-message .send-message-input:focus{border-color:#3498db;outline:none}.send-message button{background-color:#3498db;border:none;border-radius:24px;box-sizing:border-box;color:#fff;cursor:pointer;flex-shrink:0;font-size:1rem;padding:12px 24px;white-space:nowrap}.send-message button:hover{background-color:#2980b9}.send-message button:disabled{background-color:#bdc3c7;cursor:not-allowed}.send-message .error{font-size:.8rem;margin-top:5px}.attach-wrapper{flex-shrink:0;position:relative}.attach-btn{align-items:center;background:none;border:1px solid #ddd;border:1px solid var(--border-color-light);border-radius:50%;color:#555;color:var(--text-secondary);cursor:pointer;display:flex;font-size:1.3rem;height:40px;justify-content:center;line-height:1;padding:0;transition:background-color .15s,border-color .15s,color 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