:root{--bg: #f8fafc;--primary: #2563eb;--text: #1e293b;--column-bg: #e2e8f0;--danger: #ef4444}body{font-family:system-ui,sans-serif;background:var(--bg);color:var(--text);margin:0;padding-bottom:70px}header{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#fff;border-bottom:1px solid #cbd5e1}#board{display:flex;gap:1rem;padding:1rem;overflow-x:auto;align-items:flex-start}.column{background:var(--column-bg);border-radius:8px;width:350px;min-height:80vh;padding:1rem;flex-shrink:0}.column h2{font-size:1rem;color:#475569;text-transform:uppercase;margin-bottom:1rem}.task-list{min-height:70vh;transition:background .2s}.task-list.drag-over{background:#cbd5e1;border-radius:4px}.task-card{background:#fff;padding:1rem;margin-bottom:.5rem;border-radius:6px;box-shadow:0 1px 3px #0000001a;cursor:grab;display:flex;justify-content:space-between;align-items:flex-start}.task-card:active{cursor:grabbing}.delete-btn{background:none;border:none;color:var(--danger);cursor:pointer;padding:.2rem}.delete-btn:hover{background:#fee2e2;border-radius:4px}.hidden{display:none!important}#modal{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100}.modal-content{background:#fff;padding:2rem;border-radius:8px;width:90%;max-width:400px;display:flex;flex-direction:column;gap:1rem}input,textarea{padding:.5rem;border:1px solid #cbd5e1;border-radius:4px;width:100%;box-sizing:border-box}.modal-actions{display:flex;justify-content:flex-end;gap:.5rem}button{padding:.5rem 1rem;border-radius:4px;border:none;background:var(--primary);color:#fff;cursor:pointer}#cancel-btn{background:#94a3b8}@media(max-width:768px){#board{display:block;padding:0}.column{width:100%;min-height:auto;border-radius:0;padding:.5rem}.column h2{display:none}.task-list{min-height:100px;padding:.5rem}#mobile-nav{position:fixed;bottom:0;left:0;right:0;height:60px;background:#fff;border-top:1px solid #cbd5e1;display:flex;justify-content:space-around;align-items:center;z-index:50}#mobile-nav button{flex:1;height:100%;border-radius:0;background:transparent;color:var(--text);border-right:1px solid #cbd5e1;transition:background .2s}#mobile-nav button.active{color:var(--primary);font-weight:700}.column[data-status].hidden-mobile{display:none}}@media(min-width:769px){#mobile-nav{display:none}}