:root{--blue: #229ed9;--blue-dark: #1788c7;--bg: #edf6fb;--ink: #13293a;--muted: #6c7a86;--line: rgba(19, 41, 58, .1);--green: #d7ffce;--danger: #d94a4a;--shadow: 0 14px 38px rgba(18, 74, 108, .12);font-family:Segoe UI Variable,Aptos,Segoe UI,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body,#root{width:100%;height:100%;margin:0}body{overflow:hidden}button,input{font:inherit}button{cursor:pointer}svg{display:block;flex:0 0 auto;width:18px;height:18px;stroke-width:2.2}.app-shell{position:relative;display:grid;grid-template-columns:minmax(340px,430px) minmax(0,1fr);height:100%;overflow:hidden;background:var(--bg)}.chat-list-panel,.conversation{min-width:0;background:#f7fcfff5}.chat-list-panel{display:flex;flex-direction:column;border-right:1px solid var(--line)}.topbar,.conversation-header{display:flex;min-height:64px;align-items:center;gap:10px;padding:max(10px,env(safe-area-inset-top)) 12px 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