*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:#333;background-color:#f5f5f5}.app{min-height:100vh;display:flex;flex-direction:column}.header{background-color:#2563eb;color:#fff;padding:1rem 2rem}.nav{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto}.logo{font-size:1.5rem;font-weight:700;color:#fff;text-decoration:none}.nav-links{display:flex;list-style:none;gap:2rem}.nav-links a{color:#fff;text-decoration:none}.nav-links a:hover{text-decoration:underline}.main{flex:1 1;padding:2rem;max-width:1200px;margin:0 auto;width:100%}.footer{background-color:#1f2937;color:#9ca3af;text-align:center;padding:1rem}.btn{display:inline-block;padding:.5rem 1rem;border:none;border-radius:.375rem;cursor:pointer;font-size:1rem;text-decoration:none}.btn-primary{background-color:#2563eb;color:#fff}.btn-primary:hover{background-color:#1d4ed8}.btn-secondary{background-color:#6b7280;color:#fff}.btn-secondary:hover{background-color:#4b5563}.btn-danger{background-color:#dc2626;color:#fff}.btn-danger:hover{background-color:#b91c1c}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:#fff;border-radius:.5rem;box-shadow:0 1px 3px rgba(0,0,0,.1);padding:1.5rem}.card,.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input,.form-group select,.form-group textarea{width:100%;padding:.5rem;border:1px solid #d1d5db;border-radius:.375rem;font-size:1rem}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.1)}.error{color:#dc2626;font-size:.875rem;margin-top:.25rem}.error-box{background-color:#fef2f2;border:1px solid #fecaca;color:#dc2626;padding:1rem;border-radius:.375rem;margin-bottom:1rem}.loading{text-align:center;padding:2rem;color:#6b7280}.badge{display:inline-block;padding:.25rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:500;text-transform:capitalize}.badge-todo{background-color:#fef3c7;color:#92400e}.badge-in-progress{background-color:#dbeafe;color:#1e40af}.badge-done{background-color:#d1fae5;color:#065f46}.task-card{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.task-card-content{flex:1 1}.task-card-actions{display:flex;gap:.5rem;align-items:center}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.back-link{color:#6b7280;text-decoration:none;display:block;margin-bottom:.5rem}.back-link:hover{color:#374151}