:root{--bg: #121212;--card-bg: #1e1e1e;--column-bg: #1a1a1a;--text: #f0f0f0;--accent: #3b82f6;--border: #2a2a2a}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%;background-color:var(--bg);color:var(--text);font-family:Inter,sans-serif}.app{padding:2rem;text-align:center}h1{color:var(--accent)}.add-task{margin-bottom:1.5rem}input{padding:.5rem;border-radius:6px;border:1px solid var(--border);background-color:var(--card-bg);color:var(--text);margin-right:.5rem}button{background-color:var(--accent);color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;cursor:pointer}button:hover{opacity:.9}.board{display:flex;gap:1rem;justify-content:center;margin-top:1rem}.column{background:var(--column-bg);padding:1rem;border-radius:8px;width:400px;height:500px;display:flex;flex-direction:column;box-shadow:0 0 3px #03a9f48f;overflow-y:scroll;scrollbar-width:none}.card{background:var(--card-bg);padding:.75rem;margin-bottom:.5rem;border-radius:6px;box-shadow:0 2px 6px #0006;color:var(--text);text-align:left}.move-buttons{margin-top:.5rem}.move-buttons button{background-color:#374151;color:#d1d5db;padding:.25rem .5rem;margin:.25rem;font-size:.8rem;border-radius:4px}.move-buttons button:hover{background-color:var(--accent)}h1{margin-bottom:3rem}