.card{border:1px solid #ddd;border-radius:8px;padding:16px;margin:0;background:#fff;box-shadow:0 2px 4px #0000001a;box-sizing:border-box;display:flex;flex-direction:column}.board-header{width:100%;margin-bottom:16px}.board-header h2{margin:0;color:#333;font-size:1.5em}.board{display:flex;gap:16px}