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var(--line);background:transparent}.landing-stats-track{position:relative;height:76px;overflow:hidden}.landing-stat-item{position:absolute;top:16px;left:0;display:flex;align-items:baseline;justify-content:center;gap:8px;min-height:44px;min-width:max-content;animation:landing-stat-item-marquee var(--landing-stats-duration) linear infinite;animation-delay:calc(var(--landing-stats-duration) / var(--landing-stat-count) * var(--landing-stat-index) * -1);transform:translate(100vw)}.landing-stats strong{color:#2c2d25;font-size:17px}.landing-stats span{color:var(--text-sub);font-size:12px;font-weight:800}@keyframes landing-stat-item-marquee{0%{transform:translate(100vw)}to{transform:translate(-100%)}}@media(prefers-reduced-motion:reduce){.landing-stats-track{display:flex;justify-content:space-evenly;height:auto;padding:16px var(--landing-side-padding)}.landing-stat-item{position:static;animation:none;transform:none}}.landing-section{display:grid;gap:16px;padding:34px 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span{font-size:14px;font-weight:850;overflow-wrap:anywhere}.landing-category-card strong{color:var(--text-sub);font-size:12px;white-space:nowrap}.landing-problem-table{display:grid;overflow:hidden;border:1px solid #ddd5c5;border-radius:8px;background:#fbf8f0}.problem-list-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.problem-list-heading h2{margin:0;color:var(--text-main);font-size:18px}.problem-list-tools{display:flex;align-items:center;justify-content:flex-end;gap:10px}.problem-search{display:inline-flex;grid-template-columns:none;align-items:center;gap:8px;width:260px;height:38px;padding:0 12px;border:1px solid #d3cbb8;border-radius:6px;background:#fffdf8;color:var(--text-sub)}.problem-search input{width:100%;height:auto;padding:0;border:0;background:#fffdf8;box-shadow:none}.problem-search input:focus{box-shadow:none}.problem-search input:-webkit-autofill,.problem-search input:-webkit-autofill:hover,.problem-search 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120px;align-items:center;gap:12px;min-height:46px;padding:0 20px}.hide-category-column .problem-table-head,.hide-category-column .problem-table-row{grid-template-columns:minmax(220px,1fr) 120px}.problem-table-head{background:#fbf8f0;color:var(--text-sub);font-size:12px;font-weight:850}.problem-table-row{border:0;border-top:1px solid #ddd5c5;background:#fbf8f0;color:var(--text-main);text-align:left}.problem-table-row:hover,.problem-table-row:focus-visible{background:#fffdf8;outline:none}.problem-table-row.is-solved{background:#eef7e9}.problem-table-row.is-solved:hover,.problem-table-row.is-solved:focus-visible{background:#f5fbf1}.problem-table-row.is-solved strong{color:#2f6b35}.problem-table-row strong{min-width:0;overflow-wrap:anywhere;font-size:14px}.problem-table-row>span:not(.difficulty-chip){min-width:0;color:var(--text-sub);font-size:13px;overflow-wrap:anywhere}.problem-table-empty{display:grid;place-items:center;min-height:104px;margin:0;border-top:1px solid 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solid var(--line);background:#ede9df}.problem-tabs{display:inline-flex;align-items:stretch;gap:4px;align-self:stretch;min-width:0}.problem-tabs button{display:inline-flex;align-items:center;gap:6px;padding:0 12px;border:0;border-bottom:2px solid transparent;background:transparent;color:var(--text-sub);font-size:13px;font-weight:850}.problem-tabs button:hover,.problem-tabs button:focus-visible,.problem-tabs button.is-active{border-bottom-color:var(--brand);color:var(--text-main);outline:none}.problem-tabs .problem-report-tab-button{width:34px;padding:0;justify-content:center;color:#8a5a31}.problem-tabs .problem-report-tab-button:hover,.problem-tabs .problem-report-tab-button:focus-visible{border-bottom-color:#8a5a31;color:#65411f}.problem-tabs .problem-report-tab-button:disabled{opacity:.45}.problem-editor-open-button{display:inline-flex;align-items:center;gap:5px;height:auto;padding:0;border:0;background:transparent;color:var(--text-sub);font-size:12px;font-weight:850;white-space:nowrap;text-decoration:none;color:#556052;cursor:pointer}.problem-editor-open-button:hover,.problem-editor-open-button:focus-visible{color:var(--text-main);text-decoration:underline;outline:none}.problem-editor-open-button.is-back{border:0;background:transparent;color:#556052;font-size:12px;font-weight:850;text-decoration:none}.compact-list .problem-row{min-height:58px;padding:8px}.helper-text{margin:0 0 10px;color:var(--text-sub);font-size:13px;line-height:1.45}.panel{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:18px;box-shadow:none}.panel-header{display:flex;align-items:center;gap:8px;min-height:32px;margin-bottom:14px}.panel-header 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var(--line-soft);border-radius:8px;background:#ffffffad;color:var(--text-main);text-align:left}.category-panel:hover{border-color:var(--brand);background:#f8fbe8}.category-panel span{min-width:0;overflow-wrap:anywhere;font-size:17px;font-weight:750}.category-panel strong{color:var(--text-sub);font-size:12px;white-space:nowrap}.problem-row{display:grid;gap:8px;width:100%;min-height:74px;padding:12px;border:1px solid var(--line-soft);border-radius:8px;background:#fff;color:var(--text-main);text-align:left}.category-chip-list{display:inline-flex;flex-wrap:wrap;gap:6px;justify-content:flex-start}.problem-row:hover{border-color:var(--brand);background:#f8fbe8}.category-chip{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;border:1px solid #d5dec8;background:var(--ivory-soft);color:#4a5448;font-size:11px;font-weight:700;line-height:1.1;max-width:150px;overflow:hidden;text-overflow:ellipsis}.category-chip--button{justify-content:space-between;text-align:left}.problem-title-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px}.difficulty-chip{display:inline-flex;align-items:center;justify-self:start;padding:2px 8px;border-radius:999px;background:#e5ecda;border:1px solid #d0ddbf;color:#435138;font-size:12px;line-height:1.1;font-weight:700;white-space:nowrap}.difficulty-chip--easy{background:#e4efdc;border-color:#c8dab8;color:#3f5933}.difficulty-chip--normal{background:#f2e5bd;border-color:#e0c879;color:#72551c}.difficulty-chip--hard{background:#f2d1bf;border-color:#dc9a72;color:#8a3d1e}.difficulty-chip--very-hard{background:#3f1216;border-color:#6f222a;color:#fff1ee}.problem-row strong{color:var(--text-main);font-size:15px;line-height:1.35;min-width:0;overflow-wrap:anywhere}.lookup{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;margin-bottom:16px}.with-text{min-width:82px}.icon-only{width:34px;height:34px;min-width:34px;padding:0}.solve-layout{min-width:0;display:grid;grid-template-columns:var(--problem-panel-column, minmax(420px, .82fr)) 8px var(--ide-panel-column, minmax(560px, 1.18fr));gap:0;align-items:stretch;height:100%;min-height:0;width:100%;overflow:hidden}.empty{margin:0;color:#6b7280;font-size:14px}.problem-panel,.ide-panel{min-width:0;min-height:0;display:grid;grid-template-rows:auto minmax(0,1fr);border:0;border-radius:0;background:var(--surface-2);overflow:hidden}.problem-panel{background:#f8f5ee;height:100%}.panel-resizer{position:relative;width:8px;min-width:8px;padding:0;border:0;border-right:1px solid var(--line);border-left:1px solid var(--line);background:#ede9df;cursor:col-resize}.panel-resizer:after{position:absolute;top:50%;left:50%;width:2px;height:44px;border-radius:999px;background:#b8b09e;content:"";opacity:0;transform:translate(-50%,-50%);transition:opacity .15s ease,background .15s ease}.panel-resizer:hover:after,.panel-resizer:focus-visible:after{background:var(--brand);opacity:1}.panel-resizer:focus-visible{outline:2px solid rgba(110,123,91,.35);outline-offset:-2px}.problem-panel-body{min-height:0;min-width:0;padding:28px 32px 48px;overflow-y:auto;overscroll-behavior:contain}.problem-document{display:grid;gap:26px;max-width:720px}.problem-title-block{display:grid;gap:12px;padding-bottom:18px;border-bottom:1px solid #ded6c6}.problem-title-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.problem-title-block 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