:root{--teal: #008069;--teal-dark: #00604f;--chat-bg: #e5ddd5;--bubble-user: #d9fdd3;--bubble-bot: #ffffff;--page-bg: #f0f2f5;--text: #111b21;--text-muted: #667781;--border: #e0e0e0;--nav-height: 56px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:var(--text);background:var(--page-bg)}.content{min-height:100dvh;display:flex;flex-direction:column}.user-menu{position:relative}.user-menu-button{width:36px;height:36px;border-radius:50%;border:none;background:var(--teal, #128c7e);color:#fff;font-weight:700;font-size:14px;cursor:pointer;display:grid;place-items:center}.user-menu-button:hover{filter:brightness(1.06)}.user-menu-panel{position:absolute;top:calc(100% + 6px);right:0;min-width:200px;background:#fff;border-radius:12px;box-shadow:0 8px 24px #0000002e;border:1px solid var(--border, #e3e6ea);padding:12px 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