*{margin:0;padding:0;box-sizing:border-box}.app{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;padding:2rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.container{max-width:800px;width:100%}.header{text-align:center;margin-bottom:2rem;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.2)}.header h1{font-size:3rem;margin-bottom:.5rem;animation:fadeInDown .6s ease-out}.subtitle{font-size:1.2rem;opacity:.9;animation:fadeInDown .6s ease-out .2s backwards}.card{background:#fff;border-radius:20px;padding:3rem;box-shadow:0 20px 60px #0000004d;animation:fadeInUp .6s ease-out .4s backwards}.message-box{min-height:150px;display:flex;align-items:center;justify-content:center;margin-bottom:2rem;border-radius:12px;background:#f8f9fa;padding:2rem}.loading{text-align:center;color:#667eea}.spinner{width:50px;height:50px;border:5px solid #e0e0e0;border-top-color:#667eea;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 1rem}@keyframes spin{to{transform:rotate(360deg)}}.error{text-align:center;color:#dc3545}.error-icon{font-size:3rem;display:block;margin-bottom:1rem}.success{text-align:center;color:#28a745}.success-icon{font-size:3rem;display:block;margin-bottom:1rem;animation:bounceIn .6s ease-out}.success h2{font-size:2.5rem;color:#667eea;animation:bounceIn .6s ease-out .1s backwards}.button{width:100%;padding:1rem 2rem;font-size:1.2rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:12px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea99}.button:active:not(:disabled){transform:translateY(0)}.button:disabled{opacity:.6;cursor:not-allowed}.history{margin-top:2rem;background:#fff;border-radius:20px;padding:2rem;box-shadow:0 10px 30px #0003;animation:fadeInUp .6s ease-out .6s backwards}.history h3{color:#667eea;margin-bottom:1rem;font-size:1.5rem}.history-list{display:flex;flex-direction:column;gap:.75rem}.history-item{display:flex;align-items:center;gap:1rem;padding:.75rem;background:#f8f9fa;border-radius:8px;border-left:4px solid #667eea;transition:all .2s ease}.history-item:hover{background:#e9ecef;transform:translate(5px)}.time{color:#6c757d;font-size:.9rem;font-family:Courier New,monospace;min-width:90px}.history-message{font-weight:500;color:#333}.footer{text-align:center;margin-top:2rem;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.2);animation:fadeInUp .6s ease-out .8s backwards}.footer p{margin:.5rem 0}.footer code{background:#fff3;padding:.2rem .5rem;border-radius:4px;font-family:Courier New,monospace}.tech-stack{font-size:1.1rem;margin-top:1rem}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes bounceIn{0%{opacity:0;transform:scale(.3)}50%{opacity:1;transform:scale(1.05)}70%{transform:scale(.9)}to{transform:scale(1)}}@media (max-width: 768px){.header h1{font-size:2rem}.subtitle{font-size:1rem}.card{padding:2rem}.success h2{font-size:2rem}}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}