:root{--primary-color:#4caf50;--primary-light:#80e27e;--primary-dark:#087f23;--secondary-color:#a5d6a7;--background-color:#f5f8f5;--text-color:#1b5e20;--text-light:#4c7a4c;--border-color:#c8e6c9;--error-color:#f44336;--success-color:#2e7d32}*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;overflow-x:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}body{color:var(--text-color);background-color:var(--background-color);min-height:100vh}a{color:inherit;text-decoration:none}button{cursor:pointer}.page-layout{display:flex;flex-direction:column;min-height:100vh;gap:2rem;padding:2rem}.main-content{flex:1;width:100%}.chat-sidebar{width:100%}@media (min-width:1024px){.page-layout{flex-direction:row;align-items:flex-start}.main-content{flex:1;max-width:calc(100% - 400px)}.chat-sidebar{width:380px;position:sticky;top:2rem}}