*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}#root{min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background-color:#282c34;padding:1rem 2rem;color:#fff;display:flex;justify-content:space-between;align-items:center}.app-header h1{margin:0;font-size:1.5rem}.app-header nav{display:flex;gap:1rem}.app-header nav a{color:#fff;text-decoration:none;padding:.5rem 1rem;border-radius:4px;transition:background-color .2s}.app-header nav a:hover{background-color:#ffffff1a}.app-main{flex:1;padding:2rem;max-width:1200px;width:100%;margin:0 auto}.app-loading{display:flex;justify-content:center;align-items:center;min-height:100vh;font-size:1.25rem;color:#666}.auth-section{display:flex;align-items:center;gap:1rem}.user-info{display:flex;align-items:center;gap:.5rem}.user-avatar{width:32px;height:32px;border-radius:50%}.btn-login,.btn-logout,.btn-secondary{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-size:.875rem;transition:background-color .2s}.btn-login{background-color:#4caf50;color:#fff}.btn-login:hover{background-color:#45a049}.btn-logout{background-color:#f44336;color:#fff}.btn-logout:hover{background-color:#da190b}.btn-secondary{background-color:#2196f3;color:#fff}.btn-secondary:hover{background-color:#1976d2}.backend-user-info{background-color:#f5f5f5;border:1px solid #ddd;border-radius:4px;padding:1rem;margin:1rem 2rem}.backend-user-info h3{margin:0 0 .5rem}.backend-user-info pre{background-color:#282c34;color:#abb2bf;padding:1rem;border-radius:4px;overflow-x:auto;font-size:.875rem}.backend-user-info button{margin-top:.5rem;padding:.25rem .5rem;cursor:pointer}.error-message{background-color:#ffebee;border:1px solid #f44336;color:#c62828;padding:1rem;margin:1rem 2rem;border-radius:4px;display:flex;justify-content:space-between;align-items:center}.error-message button{background:none;border:none;font-size:1.25rem;cursor:pointer;color:#c62828}