:root{--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-heading: "Outfit", -apple-system, sans-serif;--bg-app: #f8fafc;--surface-white: #ffffff;--surface-column: #f1f5f9;--surface-hover: #f8fafc;--border-light: #e2e8f0;--border-subtle: #cbd5e1;--border-dark: #0f172a;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--text-faint: #94a3b8;--btn-primary-bg: #0f172a;--btn-primary-text: #ffffff;--btn-primary-hover: #1e293b;--priority-low-bg: #e2e8f0;--priority-low-text: #334155;--priority-low-border: #cbd5e1;--priority-med-bg: #fef3c7;--priority-med-text: #92400e;--priority-med-border: #fde68a;--priority-high-bg: #ffe4e6;--priority-high-text: #9f1239;--priority-high-border: #fecdd3;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--shadow-card: 0 1px 3px rgba(0, 0, 0, .05), 0 1px 2px rgba(0, 0, 0, .03);--shadow-hover: 0 4px 12px rgba(0, 0, 0, .08);--shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-primary);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:var(--font-heading);color:var(--text-primary);letter-spacing:-.02em}.app-container{display:flex;flex-direction:column;min-height:100vh}.navbar{display:flex;align-items:center;justify-content:space-between;padding:1rem 2rem;background:var(--surface-white);border-bottom:1px solid var(--border-light);position:sticky;top:0;z-index:100}.brand{display:flex;align-items:center;gap:.75rem}.brand-icon{width:36px;height:36px;background:#0f172a;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff}.brand-title{font-size:1.35rem;font-weight:700;color:#0f172a}.brand-tag{font-size:.75rem;background:#f1f5f9;color:#475569;padding:.2rem .5rem;border-radius:4px;border:1px solid var(--border-light);font-weight:600}.nav-actions{display:flex;align-items:center;gap:.75rem}.btn-primary{display:inline-flex;align-items:center;gap:.4rem;background:var(--btn-primary-bg);color:var(--btn-primary-text);padding:.55rem 1.1rem;border-radius:var(--radius-md);font-weight:600;font-size:.875rem;border:1px solid transparent;cursor:pointer;transition:background-color .15s ease,transform .1s ease}.btn-primary:hover{background:var(--btn-primary-hover)}.btn-secondary{display:inline-flex;align-items:center;gap:.4rem;background:var(--surface-white);color:var(--text-primary);padding:.55rem .9rem;border-radius:var(--radius-md);font-weight:500;font-size:.875rem;border:1px solid var(--border-subtle);cursor:pointer;transition:all .15s ease}.btn-secondary:hover{background:#f8fafc;border-color:#94a3b8}.control-bar{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 2rem;gap:1rem;flex-wrap:wrap;background:var(--surface-white);border-bottom:1px solid var(--border-light)}.search-box{position:relative;flex:1;min-width:250px;max-width:360px}.search-icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--text-muted)}.search-input{width:100%;padding:.55rem 1rem .55rem 2.25rem;background:#fff;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-size:.875rem;outline:none;transition:border-color .15s ease}.search-input:focus{border-color:#0f172a}.filter-group{display:flex;align-items:center;gap:.4rem}.filter-chip{padding:.35rem .8rem;border-radius:var(--radius-sm);font-size:.8rem;font-weight:500;background:#fff;border:1px solid var(--border-light);color:var(--text-secondary);cursor:pointer;transition:all .15s ease}.filter-chip:hover{background:#f1f5f9;color:var(--text-primary)}.filter-chip.active{background:#0f172a;border-color:#0f172a;color:#fff;font-weight:600}.board-container{flex:1;display:grid;grid-template-columns:repeat(auto-fit,minmax(310px,1fr));gap:1.5rem;padding:1.75rem 2rem;align-items:start}.kanban-column{background:var(--surface-column);border:1px solid var(--border-light);border-radius:var(--radius-lg);display:flex;flex-direction:column;max-height:calc(100vh - 190px)}.kanban-column.drag-over{background:#e2e8f0;border-color:#94a3b8}.column-header{display:flex;align-items:center;justify-content:space-between;padding:.9rem 1.1rem;background:var(--surface-white);border-top-left-radius:var(--radius-lg);border-top-right-radius:var(--radius-lg);border-bottom:1px solid var(--border-light)}.column-title{display:flex;align-items:center;gap:.5rem;font-size:.95rem;font-weight:700;color:var(--text-primary)}.column-dot{width:8px;height:8px;border-radius:50%}.dot-todo{background:#64748b}.dot-progress{background:#d97706}.dot-done{background:#16a34a}.column-count-badge{font-size:.75rem;font-weight:600;background:#f1f5f9;color:var(--text-secondary);padding:.15rem .5rem;border-radius:999px;border:1px solid var(--border-light)}.task-list{padding:.85rem;display:flex;flex-direction:column;gap:.75rem;overflow-y:auto;min-height:120px}.task-card{background:var(--surface-white);border:1px solid var(--border-light);border-radius:var(--radius-md);padding:.9rem 1rem;cursor:grab;box-shadow:var(--shadow-card);transition:all .15s ease}.task-card:hover{border-color:var(--border-subtle);box-shadow:var(--shadow-hover);transform:translateY(-1px)}.task-card.dragging{opacity:.4;cursor:grabbing}.task-header{display:flex;align-items:flex-start;justify-content:space-between;gap:.5rem;margin-bottom:.4rem}.task-title{font-size:.9rem;font-weight:600;color:var(--text-primary);line-height:1.35}.task-actions{display:flex;align-items:center;gap:.25rem}.icon-btn{background:transparent;border:none;color:var(--text-muted);padding:.25rem;border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s ease}.icon-btn:hover{background:#f1f5f9;color:var(--text-primary)}.icon-btn.delete:hover{background:#ffe4e6;color:#9f1239}.task-desc{font-size:.825rem;color:var(--text-secondary);margin-bottom:.75rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.task-footer{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-top:.65rem;padding-top:.65rem;border-top:1px solid #f1f5f9}.priority-badge{font-size:.7rem;font-weight:600;padding:.15rem .5rem;border-radius:4px;text-transform:uppercase;letter-spacing:.03em}.priority-low{background:var(--priority-low-bg);color:var(--priority-low-text);border:1px solid var(--priority-low-border)}.priority-medium{background:var(--priority-med-bg);color:var(--priority-med-text);border:1px solid var(--priority-med-border)}.priority-high{background:var(--priority-high-bg);color:var(--priority-high-text);border:1px solid var(--priority-high-border)}.move-select{background:#fff;color:var(--text-secondary);border:1px solid var(--border-light);border-radius:4px;font-size:.75rem;padding:.15rem .35rem;outline:none;cursor:pointer}.move-select:hover{border-color:var(--border-subtle);color:var(--text-primary)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0f172a66;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.modal-content{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-lg);width:100%;max-width:500px;padding:1.5rem;box-shadow:var(--shadow-modal)}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.25rem}.modal-title{font-size:1.15rem;font-weight:700;color:var(--text-primary)}.form-group{margin-bottom:1.1rem}.form-label{display:block;font-size:.825rem;font-weight:600;color:var(--text-secondary);margin-bottom:.35rem}.form-input,.form-textarea,.form-select{width:100%;padding:.6rem .85rem;background:#fff;border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-size:.875rem;font-family:inherit;outline:none;transition:border-color .15s ease}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:#0f172a}.form-error{color:#b91c1c;font-size:.8rem;margin-top:.3rem;font-weight:500}.modal-actions{display:flex;align-items:center;justify-content:flex-end;gap:.65rem;margin-top:1.5rem}.toast-banner{position:fixed;bottom:1.5rem;right:1.5rem;background:#0f172a;color:#fff;padding:.85rem 1.1rem;border-radius:var(--radius-md);box-shadow:0 10px 15px -3px #0003;display:flex;align-items:center;gap:.65rem;z-index:2000}.toast-close{background:transparent;border:none;color:#fff;cursor:pointer}.empty-state{text-align:center;padding:2rem 1rem;color:var(--text-muted);font-size:.85rem;border:1px dashed var(--border-subtle);border-radius:var(--radius-md);background:#fff}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}