.wk-stripe-section{margin-top:16px;margin-bottom:8px}.wk-stripe-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:6px;display:flex}.wk-stripe-label{font-size:10px;font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--color-mute);font-weight:700}.wk-stripe-topic{color:var(--color-link);font-size:12px;font-weight:600}.wk-stripe-bar-wrap{background:var(--color-canvas-soft-2);border:1px solid var(--color-hairline);scrollbar-width:none;border-radius:9999px;max-width:100%;padding:3px;display:inline-flex;overflow-x:auto;box-shadow:inset 0 1px 2px #0000000a}.wk-stripe-bar-wrap::-webkit-scrollbar{display:none}.wk-stripe-track{align-items:center;gap:4px;width:max-content;display:flex}.wk-stripe-tab{appearance:none;font-family:var(--font-sans);cursor:pointer;color:var(--color-body);white-space:nowrap;user-select:none;background:0 0;border:none;border-radius:9999px;outline:none;align-items:center;gap:4px;padding:6px 14px;font-size:13px;font-weight:500;text-decoration:none;transition:all .22s cubic-bezier(.16,1,.3,1);display:inline-flex;position:relative}.wk-stripe-tab:hover{color:var(--color-ink);background:#0000000d}[data-theme=dark] .wk-stripe-tab:hover{background:#ffffff14}.wk-stripe-tab.active{color:#fff;background:#1e293b;font-weight:600;box-shadow:0 3px 10px #1e293b2e}[data-theme=dark] .wk-stripe-tab.active{color:#000;background:#fff;box-shadow:0 3px 12px #ffffff38}.wk-stripe-prog{font-family:var(--font-sans);opacity:.65;margin-left:2px;font-size:12px;font-weight:400}.filter-tab-row{flex-wrap:wrap;gap:8px;margin-top:16px;display:flex}.filter-tab{background:var(--color-canvas);border:1px solid var(--color-hairline);color:var(--color-body);cursor:pointer;border-radius:20px;padding:6px 14px;font-size:13px;font-weight:500;transition:all .15s}.filter-tab:hover{border-color:var(--color-hairline-strong);color:var(--color-ink)}.filter-tab.active{color:#fff;background:#1e293b;border-color:#1e293b}[data-theme=dark] .filter-tab.active{color:#000;background:#fff;border-color:#fff}.week-label-banner{background:var(--color-canvas);border:1px solid var(--color-hairline);color:var(--color-ink);border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:24px;padding:12px 20px;font-size:14px;font-weight:600;display:flex}.week-badge{font-family:var(--font-mono);color:var(--color-link);text-transform:uppercase;letter-spacing:.04em;background:#0070f31a;border-radius:20px;padding:3px 10px;font-size:11px;font-weight:600}.challenges-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr));align-items:start;gap:24px;display:grid}.challenge-card{background:var(--color-canvas);border:1px solid var(--color-hairline);border-radius:12px;padding:24px;transition:transform .2s,border-color .2s,box-shadow .2s;box-shadow:0 2px 8px #00000008}.challenge-card:hover{border-color:var(--color-hairline-strong);box-shadow:0 4px 16px #0000000f}.card-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.badge{font-family:var(--font-mono);text-transform:uppercase;border-radius:4px;padding:3px 8px;font-size:11px;font-weight:600}.badge.easy{color:#16a34a;background:#16a34a1f}.badge.medium{color:#2563eb;background:#3b82f61f}.badge.hard{color:#d97706;background:#d977061f}.star-rating{color:#eab308;letter-spacing:2px;font-size:16px}.challenge-card h2{color:var(--color-ink);margin-bottom:8px;font-size:17px;font-weight:700}.challenge-desc{color:var(--color-body);margin-bottom:16px;font-size:13px;line-height:1.6}.widget-box{background:var(--color-canvas-soft);border:1px solid var(--color-hairline);border-radius:8px;margin-bottom:16px;padding:16px}.mystery-box{background:var(--color-ink);width:56px;height:56px;color:var(--color-canvas);font-size:26px;font-weight:700;font-family:var(--font-mono);border-radius:10px;justify-content:center;align-items:center;display:flex;box-shadow:0 4px 12px #00000026}.options-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.options-grid.col2{grid-template-columns:repeat(2,1fr)}.opt-btn{border:1px solid var(--color-hairline);background:var(--color-canvas);color:var(--color-ink);font-size:13px;font-weight:500;font-family:var(--font-mono);cursor:pointer;text-align:center;border-radius:6px;padding:10px 12px;transition:all .15s}.opt-btn:hover{border-color:var(--color-ink);background:var(--color-canvas-soft)}.opt-btn.correct{color:#fff!important;background:#16a34a!important;border-color:#16a34a!important}.opt-btn.wrong{color:#fff!important;background:#ef4444!important;border-color:#ef4444!important}.feedback-msg{text-align:center;min-height:20px;margin-top:12px;font-size:13px;font-weight:600}.feedback-msg.correct{color:#16a34a}.feedback-msg.wrong{color:#ef4444}.sol-container{border-top:1px dashed var(--color-hairline);margin-top:14px;padding-top:12px}.btn-sol{color:var(--color-link);cursor:pointer;background:0 0;border:none;padding:0;font-size:12px;font-weight:600;transition:opacity .15s}.btn-sol:hover{opacity:.8}.sol-box{background:var(--color-canvas-soft);border:1px solid var(--color-hairline);color:var(--color-body);border-radius:6px;margin-top:8px;padding:10px 12px;font-size:12px;line-height:1.5}.sol-box.hidden{display:none}@media (width<=768px){.challenges-grid{grid-template-columns:1fr;gap:16px}.challenge-card{border-radius:10px;padding:16px}.options-grid,.options-grid.col2{grid-template-columns:1fr;gap:6px}.opt-btn{min-height:40px;padding:10px;font-size:13px}.week-label-banner{padding:10px 14px;font-size:13px}.score-card{flex-wrap:wrap;gap:12px;padding:12px 16px}.filter-tab{padding:5px 11px;font-size:12px}}@media (width<=480px){.wk-stripe-header{flex-direction:column;align-items:flex-start;gap:4px}.wk-stripe-tab{padding:5px 12px;font-size:11px}}