:root{font-family:Segoe UI,system-ui,-apple-system,BlinkMacSystemFont,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400;color:#2d3748;background-color:#f5f7fa;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;padding:0;min-width:320px;min-height:100vh}#root{min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;color:#2d3748}button{font-family:inherit}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#e2e8f0;border-radius:4px}::-webkit-scrollbar-thumb{background:#cbd5e0;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a0aec0}.app{min-height:100vh;background:linear-gradient(135deg,#f5f7fa,#e8ecf1);padding:0}.header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:2rem 1rem;box-shadow:0 4px 6px #0000001a;margin-bottom:2rem}.header-content{max-width:1400px;margin:0 auto;text-align:center}.logo{height:4rem;vertical-align:middle;margin-right:1rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.header h1{margin:.5rem 0;font-size:2.5rem;font-weight:700;text-shadow:0 2px 4px rgba(0,0,0,.1)}.subtitle{margin:.5rem 0 0;font-size:1.1rem;opacity:.95;font-weight:300}.controls{max-width:1400px;margin:0 auto 2rem;padding:0 1rem;display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 4px #0000001a}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-start{background:linear-gradient(135deg,#11998e,#38ef7d);color:#fff}.btn-start:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 4px 8px #11998e4d}.btn-pause{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.btn-pause:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 4px 8px 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solid}.column-todo .column-header{border-bottom-color:#4299e1}.column-inprogress .column-header{border-bottom-color:#f6ad55}.column-done .column-header{border-bottom-color:#48bb78}.column-header h2{margin:0;font-size:1.25rem;font-weight:700;color:#2d3748}.count{background:#e2e8f0;color:#4a5568;padding:.25rem .75rem;border-radius:12px;font-weight:700;font-size:.9rem}.cards{display:flex;flex-direction:column;gap:.75rem}.card{background:linear-gradient(135deg,#fff,#f7fafc);border-radius:8px;padding:1rem;box-shadow:0 2px 4px #00000014;transition:all .3s ease;animation:slideIn .3s ease;border-left:4px solid}.column-todo .card{border-left-color:#4299e1}.column-inprogress .card{border-left-color:#f6ad55;animation:pulse 2s ease-in-out infinite}.column-done .card{border-left-color:#48bb78}.card:hover{transform:translate(4px);box-shadow:0 4px 8px #0000001f}.card h3{margin:0 0 .5rem;font-size:1rem;font-weight:700;color:#2d3748}.card p{margin:0;font-size:.875rem;color:#718096;line-height:1.4}.notifications-panel{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 4px 6px #0000001a;max-height:600px;display:flex;flex-direction:column}.notifications-panel h2{margin:0 0 1rem;font-size:1.25rem;font-weight:700;color:#2d3748;border-bottom:3px solid #667eea;padding-bottom:.75rem}.notifications{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:.75rem}.notification{background:linear-gradient(135deg,#f7fafc,#edf2f7);padding:.75rem;border-radius:8px;border-left:4px solid #667eea;animation:slideInRight .3s ease}.notification .timestamp{display:block;font-size:.75rem;color:#a0aec0;margin-bottom:.25rem;font-weight:600}.notification p{margin:0;font-size:.9rem;color:#4a5568;line-height:1.4}.empty-state{text-align:center;color:#a0aec0;font-style:italic;padding:2rem 1rem}.completion-banner{max-width:1400px;margin:2rem auto;padding:1.5rem;background:linear-gradient(135deg,#48bb78,#38a169);color:#fff;text-align:center;border-radius:12px;font-size:1.5rem;font-weight:700;box-shadow:0 8px 16px #48bb784d;animation:bounceIn .6s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{box-shadow:0 2px 4px #00000014}50%{box-shadow:0 4px 12px #f6ad554d}}@keyframes bounceIn{0%{opacity:0;transform:scale(.9)}50%{transform:scale(1.05)}to{opacity:1;transform:scale(1)}}@media(max-width:1200px){.dashboard{grid-template-columns:1fr}.notifications-panel{max-height:300px}}@media(max-width:768px){.board{grid-template-columns:1fr}.header h1{font-size:1.75rem}.controls{justify-content:center}.speed-control{margin-left:0;width:100%;justify-content:center}}