.error-boundary{display:flex;align-items:center;justify-content:center;min-height:400px;padding:2rem;background-color:#f8f9fa;border-radius:8px;margin:2rem 0}.error-content{text-align:center;max-width:500px}.error-icon{font-size:3rem;margin-bottom:1rem}.error-content h2{color:#1a1a1a;margin-bottom:.5rem}.error-content p{color:#666;margin-bottom:2rem}.btn-retry{background-color:#06c;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;font-weight:600;cursor:pointer;transition:background-color .2s}.btn-retry:hover{background-color:#0052a3}.error-details{margin-top:2rem;text-align:left;background:#fff;padding:1rem;border-radius:4px;border:1px solid #e0e0e0;overflow-x:auto}.error-details summary{cursor:pointer;color:#06c;margin-bottom:.5rem;outline:none}.error-details pre{font-size:.75rem;white-space:pre-wrap;color:#d32f2f}.loading-spinner-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;width:100%;min-height:200px}.loading-spinner-container.fullscreen{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#ffffffe6;z-index:9999}.spinner{width:40px;height:40px;border:3px solid #f3f3f3;border-top:3px solid #0066cc;border-radius:50%;animation:spin 1s linear infinite}.loading-text{margin-top:1rem;color:#666;font-size:.9rem;font-weight:500}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.app-layout{min-height:100vh;display:flex;flex-direction:column}.app-header{background:linear-gradient(135deg,#1a4d8f,#06c);color:#fff;padding:1rem 0;box-shadow:0 2px 8px #0000001a}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.header-content{display:flex;align-items:center;justify-content:space-between;gap:2rem}.logo{text-decoration:none;color:#fff}.logo h1{margin:0;font-size:1.5rem;font-weight:700}.logo .slogan{margin:0;font-size:.875rem;font-weight:400;opacity:.9;font-style:italic}.main-nav{display:flex;gap:1.5rem;flex:1}.main-nav a{color:#fff;text-decoration:none;font-weight:500;padding:.5rem 0;border-bottom:2px solid transparent;transition:border-color .2s ease}.main-nav a:hover{border-bottom-color:#fff}.user-menu{display:flex;align-items:center;gap:1rem}.nav-link{color:#fff;text-decoration:none;font-weight:500}.user-name{color:#ffffffe6;font-size:.9375rem}.btn-logout,.btn-login,.btn-register{padding:.5rem 1rem;border-radius:4px;font-weight:500;text-decoration:none;transition:all .2s ease;border:none;cursor:pointer;font-size:.9375rem}.btn-logout{background:#fff3;color:#fff}.btn-logout:hover{background:#ffffff4d}.btn-login{background:transparent;color:#fff;border:1px solid white;display:inline-block}.btn-login:hover{background:#ffffff1a}.btn-register{background:#fff;color:#06c;display:inline-block}.btn-register:hover{background:#f0f0f0}.app-main{flex:1;padding:2rem 0;background:#f8f9fa}.app-footer{background:#2a2a2a;color:#ccc;padding:1.5rem 0;text-align:center}.app-footer p{margin:0;font-size:.875rem}@media(max-width:768px){.header-content{flex-direction:column;align-items:flex-start;gap:1rem}.main-nav{flex-direction:column;gap:.5rem;width:100%}.user-menu{width:100%;justify-content:flex-start}}*{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;background:#f8f9fa;color:#1a1a1a}.loading{text-align:center;padding:3rem;font-size:1.125rem;color:#666}.error-message{text-align:center;padding:3rem;background:#fff3f3;border:1px solid #ffcdd2;border-radius:8px;color:#d32f2f}.placeholder-page{text-align:center;padding:4rem 2rem;background:#fff;border-radius:8px;box-shadow:0 1px 3px #0000001a}.placeholder-page h1{font-size:2rem;margin-bottom:1rem;color:#1a1a1a}.placeholder-page p{font-size:1.125rem;color:#666}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}