.problem-index{display:none}
.problem-example{padding:24px;border:1px solid var(--line);border-radius:20px;background:var(--paper);margin:28px 0}
.problem-example h2{margin-top:0}
.problem-table{width:100%;border-collapse:collapse;margin:24px 0 32px;font-size:.96rem;table-layout:fixed}
.problem-table th,.problem-table td{padding:15px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);overflow-wrap:anywhere}
.problem-table th{background:var(--paper);color:var(--ink)}
.problem-table caption{text-align:left;font-weight:700;margin-bottom:12px}
@media(max-width:900px){.problem-index{display:block;margin-bottom:28px;padding:18px;border:1px solid var(--line);border-radius:18px;background:var(--paper)}.problem-index summary{cursor:pointer;font-weight:700}.problem-index nav{display:grid;gap:12px;margin-top:18px}.sidebar-card,.side-card{display:none}}
@media(max-width:650px){.problem-table,.problem-table tbody,.problem-table tr,.problem-table td{display:block;width:100%}.problem-table{table-layout:auto}.problem-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.problem-table tr{border:1px solid var(--line);border-radius:16px;margin:14px 0;overflow:hidden}.problem-table td{border-bottom:0;padding:12px 15px;box-sizing:border-box}.problem-table td+td{border-top:1px solid var(--line)}.problem-table td:before{content:attr(data-label);display:block;font-weight:700;color:var(--ink);margin-bottom:5px}.problem-example{padding:20px}}