*{margin:0;padding:0;box-sizing:border-box}body{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}.page-container{max-width:1200px;margin:0 auto;padding:2rem}.user-list{list-style:none}.user-item{padding:1rem;border-bottom:1px solid #eee;cursor:pointer}.user-item:hover{background-color:#f5f5f5}.loading-spinner{display:flex;justify-content:center;align-items:center;padding:2rem}.spinner{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-message{padding:1rem;background-color:#fee;color:#c33;border-radius:4px;margin:1rem 0}.main-layout{min-height:100vh;display:flex;flex-direction:column}.main-layout__header{padding:.75rem 1.5rem;background-color:#1a1a2e;color:#eee;border-bottom:1px solid #333}.main-layout__nav{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:1.5rem}.main-layout__brand{font-weight:700;font-size:1.25rem;color:#fff;text-decoration:none}.main-layout__brand:hover{text-decoration:underline}.main-layout__link{color:#b8b8b8;text-decoration:none}.main-layout__link:hover{color:#fff}.main-layout__main{flex:1}.main-layout__footer{padding:1rem 1.5rem;background-color:#f5f5f5;border-top:1px solid #eee;text-align:center}.main-layout__footer-text{font-size:.875rem;color:#666}