:root{--primary:#6366f1;--accent:#8b5cf6;--background:#f8fafc;--surface:#fff;--border:#e2e8f0;--text:#0f172a;--text-secondary:#64748b;--error:#ef4444;--success:#10b981;--warning:#f59e0b;--priority-critical:#dc2626;--priority-high:#ea580c;--priority-medium:#f59e0b;--priority-low:#84cc16}*,:before,:after{box-sizing:border-box}body{-webkit-font-smoothing:antialiased;background:var(--background);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{flex-direction:column;min-height:100vh;display:flex}.app-content{flex:1;padding-bottom:80px}.screen{max-width:1200px;margin:0 auto;padding:24px 16px}.screen-header{margin-bottom:32px}.screen-title{color:var(--text);margin:0 0 8px;font-size:32px;font-weight:700}.screen-subtitle{color:var(--text-secondary);margin:0;font-size:16px}.tab-bar{background:var(--surface);border-top:1px solid var(--border);z-index:100;justify-content:space-around;padding:8px;display:flex;position:fixed;bottom:0;left:0;right:0}.tab-button{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;flex-direction:column;align-items:center;gap:4px;padding:8px 16px;font-size:14px;transition:color .2s;display:flex}.tab-button:hover{color:var(--primary)}.tab-button.active{color:var(--primary);font-weight:600}.tab-icon{font-size:24px}.tab-label{font-size:12px}.btn{cursor:pointer;border:none;border-radius:8px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#4f46e5}.btn-primary:disabled{cursor:not-allowed;background:#cbd5e1}.btn-secondary{background:var(--border);color:var(--text)}.btn-secondary:hover{background:#cbd5e1}.icon-btn{cursor:pointer;background:0 0;border:none;border-radius:4px;padding:8px;font-size:18px;transition:background .2s}.icon-btn:hover{background:var(--border)}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;padding:20px;transition:box-shadow .2s}.card:hover{box-shadow:0 4px 12px #0000001a}.card-title{color:var(--text);margin:0 0 8px;font-size:20px;font-weight:700}.card-description{color:var(--text-secondary);margin:0;font-size:14px}.card-footer{justify-content:space-between;align-items:center;gap:12px;margin-top:16px;display:flex}.card-meta{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.action-buttons{gap:4px;display:flex}.task-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;margin-bottom:12px;padding:16px;transition:box-shadow .2s}.task-card:hover{box-shadow:0 2px 8px #00000014}.task-card-header{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:8px;display:flex}.task-card-title{color:var(--text);flex:1;margin:0;font-size:16px;font-weight:600}.task-card-description{color:var(--text-secondary);margin:0 0 12px;font-size:14px;line-height:1.5}.task-card-footer{justify-content:space-between;align-items:center;gap:12px;display:flex}.badge{background:var(--border);color:var(--text);white-space:nowrap;border-radius:12px;align-items:center;padding:4px 10px;font-size:12px;font-weight:600;display:inline-flex}.badge-priority-critical{color:var(--priority-critical);background:#fee2e2}.badge-priority-high{color:var(--priority-high);background:#ffedd5}.badge-priority-medium{color:#d97706;background:#fef3c7}.badge-priority-low{color:#65a30d;background:#ecfccb}.badge-status-done{color:#059669;background:#d1fae5}.badge-status-inprogress{color:#2563eb;background:#dbeafe}.badge-status{background:var(--border);color:var(--text-secondary)}.assignee-avatar{background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:14px;font-weight:600;display:flex}.filter-bar{flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:24px;display:flex}.filter-group{align-items:center;gap:8px;display:flex}.filter-label{color:var(--text);font-size:14px;font-weight:600}.filter-select{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:6px;padding:8px 12px;font-size:14px}.filter-select:hover{border-color:var(--primary)}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px;display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:8px;padding:20px}.stat-value{color:var(--primary);margin-bottom:4px;font-size:32px;font-weight:700}.stat-label{color:var(--text-secondary);font-size:14px}.progress-bar{background:var(--border);border-radius:4px;width:100%;height:8px;overflow:hidden}.progress-fill{background:var(--primary);height:100%;transition:width .3s}.board-container{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;margin-top:24px;display:grid}.board-column{background:var(--surface);border:1px solid var(--border);border-radius:8px;min-height:400px;padding:16px}.board-column-header{border-bottom:2px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;display:flex}.board-column-title{color:var(--text);margin:0;font-size:16px;font-weight:700}.board-column-count{background:var(--border);color:var(--text-secondary);border-radius:12px;padding:4px 8px;font-size:12px;font-weight:600}.board-column-tasks{flex-direction:column;gap:12px;display:flex}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal{background:var(--surface);border-radius:12px;width:100%;max-width:500px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 40px #0003}.modal-header{border-bottom:1px solid var(--border);padding:24px 24px 16px}.modal-title{color:var(--text);margin:0;font-size:24px;font-weight:700}.modal-body{padding:24px}.modal-footer{border-top:1px solid var(--border);justify-content:flex-end;gap:12px;padding:16px 24px;display:flex}.form{flex-direction:column;gap:20px;display:flex}.form-group{flex-direction:column;gap:8px;display:flex}.form-label{color:var(--text);font-size:14px;font-weight:600}.form-input,.form-textarea,.form-select{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:6px;padding:10px 12px;font-family:inherit;font-size:14px}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #6366f11a}.form-textarea{resize:vertical;min-height:100px}.empty-state{text-align:center;padding:60px 20px}.empty-state-icon{margin-bottom:16px;font-size:64px}.empty-state-title{color:var(--text);margin:0 0 8px;font-size:24px;font-weight:700}.empty-state-message{color:var(--text-secondary);margin:0 0 24px;font-size:16px}.loading{text-align:center;padding:60px 20px}.loading-spinner{border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;margin:0 auto 16px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading p{color:var(--text-secondary);font-size:16px}.error{color:#991b1b;background:#fee2e2;border:1px solid #fecaca;border-radius:8px;margin-bottom:16px;padding:16px}.error strong{font-weight:700}@media (width>=768px){.app-content{padding-bottom:0}.tab-bar{border-top:none;border-bottom:1px solid var(--border);background:var(--surface);justify-content:flex-start;padding:0 16px;position:static}.tab-button{flex-direction:row;gap:8px;padding:16px 24px}.tab-icon{font-size:20px}.tab-label{font-size:14px}.screen{padding:32px 24px}.board-container{grid-template-columns:repeat(3,1fr)}}