.board{padding:20px}.topbar{display:flex;gap:10px;margin-bottom:20px}.columns{display:flex;gap:20px}.column{flex:1;border:1px solid #ccc;padding:10px;min-height:300px;background:#fafafa}.task-card{background:#fff;padding:10px;margin:8px 0;border-radius:6px;cursor:grab;box-shadow:0 1px 3px #0000001a}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#0000004d}.modal-content{background:#fff;padding:20px;width:300px;margin:100px auto;display:flex;flex-direction:column;gap:10px}.activity{margin-top:30px;border-top:1px solid #ccc;padding-top:10px}.center{display:flex;justify-content:center;align-items:center;height:100vh}.card{padding:20px;border:1px solid #ccc;width:300px;display:flex;flex-direction:column;gap:10px}.error{color:red}