*{box-sizing:border-box;margin:0;padding:0}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;background-color:#f5f5f5;color:#333}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background-color:#1a1a1a;color:#fff;padding:1rem 0;box-shadow:0 2px 4px #0000001a}.header-content{display:flex;justify-content:space-between;align-items:center}.logo{text-decoration:none;color:#fff}.logo h1{font-size:1.8rem;font-weight:700}.nav-menu{display:flex;gap:2rem;align-items:center}.nav-menu a{color:#fff;text-decoration:none;font-weight:500;transition:color .2s}.nav-menu a:hover{color:#4a9eff}.main-content{flex:1;padding:2rem 0}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.btn{padding:.6rem 1.5rem;border:none;border-radius:4px;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s;text-decoration:none;display:inline-block}.btn-primary{background-color:#4a9eff;color:#fff}.btn-primary:hover{background-color:#3a8eef}.btn-secondary{background-color:#6c757d;color:#fff}.btn-secondary:hover{background-color:#5a6268}.card{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:1.5rem;margin-bottom:1.5rem}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input,.form-group select,.form-group textarea{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#4a9eff}.loading-screen{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;background-color:#1a1a1a;color:#fff}.spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.app-footer{background-color:#1a1a1a;color:#fff;padding:2rem 0;text-align:center;margin-top:auto}.app-footer p{margin:.5rem 0}.powered-by{font-size:.9rem;opacity:.7}@media (max-width: 768px){.header-content,.nav-menu{flex-direction:column;gap:1rem}.grid{grid-template-columns:1fr}}