.board{display:grid;gap:2px;margin-bottom:1rem}.tile{display:flex;align-items:center;justify-content:center;font-size:26px;border-radius:6px;-webkit-user-select:none;user-select:none;box-shadow:0 1px 2px #00000026}.tile.wall{background:#3f3f3f}.tile.empty{background:#e9e9e9}.tile.agent{background:#a6c8ff}.tile.box{background:#d79e58}.tile.goal{background:#7de67d}.tile.box_on_goal{background:gold}.solved{color:#4caf50;font-weight:700}.site-header{background-color:#282c34;padding:1rem 2rem;color:#fff;text-align:center;box-shadow:0 2px 4px #0000001a;display:flex;align-items:center;justify-content:center}.site-header h1{margin:0;font-size:1.5rem;font-weight:600}.header-logo{height:40px;margin-right:1rem}.site-footer{background-color:#f5f5f5;padding:.75rem 1rem;text-align:center;font-size:.9rem;color:#666;margin-top:2rem;border-top:1px solid #e0e0e0}.app-container{display:flex;align-items:flex-start;gap:2rem;width:fit-content;margin:0 auto}.survey-panel{width:260px;border:1px solid #ddd;padding:1rem;border-radius:8px;background-color:#fafafa;box-shadow:0 1px 3px #0000001a}.survey-panel h2{margin-top:0}.survey-panel button{margin-top:.5rem}body{margin:0;font-family:Arial,Helvetica,sans-serif;background-color:#fafafa}*{box-sizing:border-box}