:root{--vt-text:#6b6375;--vt-text-h:var(--text);--vt-bg:#fff;--vt-border:#e5e4e7;--vt-code-bg:#f4f3ec;--vt-shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--vt-sans:var(--font-sans);--vt-heading:var(--font-sans);--vt-mono:ui-monospace, Consolas, monospace;font:18px/145% var(--vt-sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--vt-text);background:var(--vt-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{--vt-text:#9ca3af;--vt-text-h:#f3f4f6;--vt-bg:#16171d;--vt-border:#2e303a;--vt-code-bg:#1f2028;--vt-shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}html,body{background:var(--surface);margin:0}body:not(.etp-test-column) #root{font-family:var(--font-sans);color:var(--text);letter-spacing:normal;font-size:16px}body:not(.etp-test-column) #root :is(button,input,select,textarea){font-family:inherit}body:not(.etp-test-column) #root h1,body:not(.etp-test-column) #root h2{font-family:var(--font-sans);letter-spacing:-.02em;color:var(--text);font-weight:600}#root{text-align:center;box-sizing:border-box;flex-direction:column;width:100%;min-height:100svh;margin:0 auto;display:flex}body.etp-test-column #root{border-inline:1px solid var(--vt-border);width:1126px;max-width:100%}h1,h2{font-family:var(--vt-heading);color:var(--vt-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(--vt-mono);color:var(--vt-text-h);border-radius:4px;display:inline-flex}code{background:var(--vt-code-bg);padding:4px 8px;font-size:15px;line-height:135%}:root{--brand:#14213d;--text:#0f1b33;--text-secondary:#5a6478;--border:#e3e7ef;--border-input:#7c8597;--surface:#fff;--surface-alt:#f4f6fa;--toefl:#6b5bd2;--toefl-tint:#eeebfc;--toefl-ink:#4535a8;--ielts:#d93445;--ielts-tint:#fce9eb;--ielts-ink:#a8202f;--success:#1f8a55;--success-tint:#eef8f2;--success-ink:#1b6b43;--danger:#b42318;--danger-tint:#fef3f2;--danger-ink:#b42318;--warning-tint:#fff6e5;--warning-ink:#8a5300;--font-sans:"Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--fs-display:40px;--fw-display:700;--lh-display:1.1;--ls-display:-.02em;--fs-h2:28px;--fw-h2:700;--lh-h2:1.2;--ls-h2:0;--fs-h3:20px;--fw-h3:600;--lh-h3:1.3;--ls-h3:0;--fs-body:16px;--fw-body:400;--lh-body:1.6;--ls-body:0;--fs-small:13px;--fw-small:400;--lh-small:1.5;--ls-small:0;--fs-question:17px;--fw-question:600;--lh-question:1.5;--ls-question:0;--fs-passage:16px;--fw-passage:400;--lh-passage:1.7;--ls-passage:0;--radius-card:14px;--radius-button:10px;--radius-pill:999px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--space-8:64px;--content-max:1120px;--article-max:720px;--gutter:16px;--border-width:1px;--button-border:1.5px;--tap-min:44px}@media (width<=640px){:root{--fs-display:28px;--fs-h2:22px;--fs-h3:18px}}