:root{--bg:#0f1419;--surface:#1a2332;--border:#2d3a4f;--text:#e8edf4;--muted:#8b9cb3;--accent:#3d8bfd;--accent-hover:#5c9dff;--success:#3dd68c;--danger:#f87171}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}a{color:var(--accent)}main{max-width:960px;margin:0 auto;padding:2rem 1rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem}.btn{display:inline-block;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.6rem 1rem;font-size:.95rem;cursor:pointer;text-decoration:none}.btn:hover{background:var(--accent-hover)}.btn-secondary{background:transparent}.btn-secondary,input,select,textarea{border:1px solid var(--border);color:var(--text)}input,select,textarea{width:100%;background:var(--bg);border-radius:8px;padding:.6rem .75rem;margin-bottom:.75rem}label{display:block;color:var(--muted);margin-bottom:.25rem}.error,label{font-size:.875rem}.error{color:var(--danger);margin-bottom:.75rem}.task-list{list-style:none;padding:0;margin:0}.task-item{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;padding:1rem 0;border-bottom:1px solid var(--border)}.task-item:last-child{border-bottom:none}.badge{font-size:.75rem;padding:.15rem .5rem;border-radius:999px;background:var(--border);color:var(--muted)}.badge.done{background:rgba(61,214,140,.15);color:var(--success)}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.muted{color:var(--muted);font-size:.875rem}