:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}body{margin:0}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 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#2e2c3e;border-radius:8px;width:36px;height:36px;font-size:14px;transition:background .15s}.controls-buttons button:hover:not(:disabled){background:#302d50}.controls-buttons button:disabled{opacity:.3;cursor:default}.controls-buttons .play-pause{background:#3c3489;border-color:#534ab7}.controls-speed{color:#888;flex:1;align-items:center;gap:8px;min-width:160px;font-size:13px;display:flex}.controls-speed input[type=range]{accent-color:#7f77dd;flex:1}.controls-progress{color:#555;margin-left:auto;font-size:13px}.stats{color:#888;gap:24px;padding:10px 0;font-size:14px;display:flex}.stats strong{color:#c4bfef}.mode-tabs{gap:8px;margin-bottom:1.5rem;display:flex}.tab{color:#888;cursor:pointer;background:#1a1826;border:1px solid #2e2c3e;border-radius:8px;padding:8px 20px;font-size:14px;transition:all .15s}.tab:hover{color:#e8e6f0;background:#252336}.tab.active{color:#fff;background:#534ab7;border-color:#534ab7}.quiz-row{justify-content:space-between;align-items:center;margin-top:.5rem;display:flex}.btn-quiz{color:#1d9e75;cursor:pointer;background:0 0;border:1px solid #1d9e75;border-radius:8px;padding:8px 20px;font-size:14px;transition:all .15s}.btn-quiz:hover:not(:disabled){color:#fff;background:#1d9e75}.btn-quiz:disabled{opacity:.4;cursor:default}.quiz-card{background:#1a1826;border:1px solid #2e2c3e;border-radius:14px;margin-bottom:1rem;padding:2rem}.quiz-progress{color:#555;margin-bottom:1rem;font-size:12px}.quiz-question{margin-bottom:1.25rem;font-size:1rem;font-weight:500;line-height:1.5}.quiz-options{flex-direction:column;gap:10px;display:flex}.quiz-option{color:#e8e6f0;text-align:left;cursor:pointer;background:#13111f;border:1px solid #2e2c3e;border-radius:8px;padding:10px 16px;font-size:14px;transition:background .15s}.quiz-option:hover{background:#252336}.quiz-option.correct{color:#1d9e75;background:#0d2a1f;border-color:#1d9e75}.quiz-option.wrong{color:#d85a30;background:#2a150d;border-color:#d85a30}.quiz-explanation{background:#13111f;border:1px solid #2e2c3e;border-radius:8px;margin-top:1rem;padding:12px 16px;font-size:14px;line-height:1.6}.quiz-explanation strong{margin-bottom:6px;display:block}.quiz-btn{margin-top:1.25rem;padding:10px 24px}.quiz-score{color:#c4bfef;margin:1rem 0 .5rem;font-size:2rem;font-weight:700}.quiz-score-msg{color:#888;margin-bottom:1.5rem}.quiz-context{border-bottom:1px solid #2e2c3e;align-items:center;gap:16px;margin-bottom:1.25rem;padding-bottom:1rem;display:flex}.quiz-algo{text-transform:capitalize;color:#7f77dd;background:#1a1633;border:1px solid #534ab7;border-radius:20px;padding:3px 10px;font-size:12px;font-weight:600}.quiz-array{color:#888;font-family:monospace;font-size:12px}