.psle-module__QiRKhW__page{background:var(--page);min-height:100vh;color:var(--ink);font-family:var(--sans)}.psle-module__QiRKhW__skip{z-index:1200;background:var(--white);color:var(--ink);border-radius:10px;padding:10px 16px;position:absolute;top:-100px;left:16px}.psle-module__QiRKhW__skip:focus{top:12px}.psle-module__QiRKhW__header{z-index:50;background:color-mix(in srgb, var(--page) 92%, transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:var(--shadow-nav);position:sticky;top:0}.psle-module__QiRKhW__headerInner{justify-content:space-between;align-items:center;gap:16px;max-width:1120px;margin:0 auto;padding:12px 16px;display:flex}.psle-module__QiRKhW__wordmark{color:var(--ink);letter-spacing:-.01em;white-space:nowrap;font-size:18px;font-weight:750;text-decoration:none}.psle-module__QiRKhW__wordmark span{color:var(--ink-60);margin-left:6px;font-size:13px;font-weight:500}.psle-module__QiRKhW__nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:4px;display:flex}.psle-module__QiRKhW__navLink{color:var(--ink-75);border-radius:10px;padding:8px 10px;font-size:15px;font-weight:650;text-decoration:none}.psle-module__QiRKhW__navLink:hover{background:var(--oat);color:var(--ink)}.psle-module__QiRKhW__btn,.psle-module__QiRKhW__btnGhost{border-radius:var(--ug-radius-sm);min-height:48px;font:inherit;cursor:pointer;border:0;justify-content:center;align-items:center;padding:0 22px;font-size:16px;font-weight:700;text-decoration:none;display:inline-flex}.psle-module__QiRKhW__btn{background:var(--ug-action);color:#fff;box-shadow:var(--shadow-cta);transition:transform .12s var(--ug-ease)}.psle-module__QiRKhW__btn:hover{background:var(--ug-action-edge)}.psle-module__QiRKhW__btn:active{box-shadow:0 2px 0 var(--ug-action-edge);transform:translateY(2px)}.psle-module__QiRKhW__btn:disabled{opacity:.6;cursor:default}.psle-module__QiRKhW__btnGhost{background:var(--white);color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--border)}.psle-module__QiRKhW__btnGhost:hover{box-shadow:inset 0 0 0 1.5px var(--ug-action)}.psle-module__QiRKhW__btn:focus-visible,.psle-module__QiRKhW__btnGhost:focus-visible,.psle-module__QiRKhW__navLink:focus-visible,.psle-module__QiRKhW__card:focus-visible,.psle-module__QiRKhW__option:focus-visible{outline:3px solid var(--ug-action);outline-offset:3px}.psle-module__QiRKhW__hero{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);align-items:center;gap:32px;max-width:1120px;margin:0 auto;padding:56px 16px 40px;display:grid}.psle-module__QiRKhW__eyebrow{color:var(--green-text);margin:0 0 12px;font-size:15px;font-weight:700}.psle-module__QiRKhW__heroTitle{letter-spacing:-.025em;max-width:18ch;margin:0 0 14px;font-size:clamp(32px,5vw,52px);font-weight:780;line-height:1.06}.psle-module__QiRKhW__heroLede{max-width:56ch;color:var(--ink-75);margin:0 0 24px;font-size:18px;line-height:1.55}.psle-module__QiRKhW__heroArt{border-radius:var(--ug-radius);background:var(--white);box-shadow:inset 0 0 0 1px var(--border), 0 12px 30px #1d1b2e0f;padding:22px}.psle-module__QiRKhW__actions{flex-wrap:wrap;gap:12px;display:flex}.psle-module__QiRKhW__note{max-width:70ch;color:var(--ink-60);margin:20px 0 0;font-size:13px;line-height:1.5}.psle-module__QiRKhW__section{padding:44px 0}.psle-module__QiRKhW__section[data-tone=oat]{background:var(--oat)}.psle-module__QiRKhW__sectionInner{max-width:1120px;margin:0 auto;padding:0 16px}.psle-module__QiRKhW__sectionTitle{letter-spacing:-.015em;margin:0 0 8px;font-size:clamp(24px,3vw,32px);font-weight:740;line-height:1.15}.psle-module__QiRKhW__intro{max-width:64ch;color:var(--ink-75);margin:0 0 20px;font-size:16px;line-height:1.55}.psle-module__QiRKhW__grid2{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.psle-module__QiRKhW__grid3{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.psle-module__QiRKhW__panel{border-radius:var(--ug-radius);background:var(--white);box-shadow:inset 0 0 0 1px var(--border);padding:20px 22px}.psle-module__QiRKhW__panelTitle{margin:0 0 10px;font-size:20px;font-weight:720;line-height:1.2}.psle-module__QiRKhW__panelBody{color:var(--ink-75);margin:0;font-size:15px;line-height:1.5}.psle-module__QiRKhW__facts{color:var(--ink-75);gap:8px;margin:0;padding:0 0 0 18px;font-size:15px;line-height:1.45;display:grid}.psle-module__QiRKhW__cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.psle-module__QiRKhW__card{border-radius:var(--ug-radius-sm);background:var(--white);box-shadow:inset 0 0 0 1px var(--border);color:var(--ink);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:4px 16px;padding:16px 18px;text-decoration:none;display:grid}a.psle-module__QiRKhW__card:hover{box-shadow:inset 0 0 0 1.5px var(--ug-action)}.psle-module__QiRKhW__cardTitle{font-size:17px;font-weight:700;line-height:1.25}.psle-module__QiRKhW__cardBody{color:var(--ink-60);grid-column:1;font-size:14px;line-height:1.45}.psle-module__QiRKhW__cardGo{color:var(--ug-action-edge);grid-area:1/2/span 2;font-size:13px;font-weight:700}.psle-module__QiRKhW__soon{color:var(--ink-45);grid-area:1/2/span 2;font-size:12px;font-weight:700}.psle-module__QiRKhW__chooser{max-width:880px;margin:0 auto;padding:32px 16px 64px}.psle-module__QiRKhW__back{color:var(--ink-60);margin:0 0 16px;font-size:14px;font-weight:600;text-decoration:none;display:inline-block}.psle-module__QiRKhW__back:hover{color:var(--ink)}.psle-module__QiRKhW__title{letter-spacing:-.015em;margin:0 0 8px;font-size:32px;font-weight:760;line-height:1.15}.psle-module__QiRKhW__preview{background:var(--retry-tint);color:var(--retry-ink);border-radius:999px;margin:0 0 12px;padding:4px 10px;font-size:13px;font-weight:700;display:inline-block}.psle-module__QiRKhW__moduleTitle{margin:28px 0 10px;font-size:20px;font-weight:720}.psle-module__QiRKhW__form{gap:10px;max-width:560px;display:grid}.psle-module__QiRKhW__formRow{flex-wrap:wrap;gap:8px;display:flex}.psle-module__QiRKhW__input{border-radius:var(--ug-radius-sm);min-height:48px;box-shadow:inset 0 0 0 1.5px var(--border);background:var(--white);color:var(--ink);font:inherit;border:0;flex:220px;padding:0 14px;font-size:17px}.psle-module__QiRKhW__input:focus-visible{outline:3px solid var(--ug-action);outline-offset:1px}.psle-module__QiRKhW__consent{color:var(--ink-75);align-items:flex-start;gap:8px;font-size:14px;line-height:1.45;display:flex}.psle-module__QiRKhW__formError{color:var(--wrong-ink);margin:0;font-size:14px;font-weight:600}.psle-module__QiRKhW__formDone{border-radius:var(--ug-radius-sm);background:var(--correct-tint);color:var(--ink);gap:4px;padding:14px 16px;display:grid}.psle-module__QiRKhW__honeypot{opacity:0;width:1px;height:1px;position:absolute;left:-10000px}.psle-module__QiRKhW__item{border-radius:var(--ug-radius);background:var(--white);box-shadow:inset 0 0 0 1px var(--border);margin:0 0 20px;padding:20px 22px}.psle-module__QiRKhW__meta{flex-wrap:wrap;gap:6px;margin:0 0 12px;display:flex}.psle-module__QiRKhW__tag{background:var(--oat);color:var(--ink-75);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:700}.psle-module__QiRKhW__stem{white-space:pre-line;font-size:17px;line-height:1.6}.psle-module__QiRKhW__experiment{border-radius:var(--ug-radius-sm);background:var(--tint-blue);margin:12px 0 0;padding:12px 14px;font-size:14px;line-height:1.5}.psle-module__QiRKhW__part{box-shadow:inset 0 1px 0 var(--ink-10);margin:16px 0 0;padding:16px 0 0}.psle-module__QiRKhW__partHead{grid-template-columns:auto minmax(0,1fr) auto;align-items:baseline;gap:10px;font-size:17px;line-height:1.55;display:grid}.psle-module__QiRKhW__partLabel{font-weight:750}.psle-module__QiRKhW__partMarks{color:var(--ink-60);white-space:nowrap;font-size:13px}.psle-module__QiRKhW__options{gap:8px;margin:12px 0 0;display:grid}.psle-module__QiRKhW__option{text-align:left;border-radius:var(--ug-radius-sm);background:var(--gray-99);box-shadow:inset 0 0 0 1.5px var(--border);color:var(--ink);font:inherit;cursor:pointer;border:0;grid-template-columns:auto minmax(0,1fr);align-items:start;gap:10px;padding:12px 14px;font-size:16px;display:grid}.psle-module__QiRKhW__option:hover:not(:disabled){box-shadow:inset 0 0 0 1.5px var(--ug-action)}.psle-module__QiRKhW__option[data-state=right]{background:var(--correct-tint);box-shadow:inset 0 0 0 2px var(--correct)}.psle-module__QiRKhW__option[data-state=wrong]{background:var(--wrong-tint);box-shadow:inset 0 0 0 2px var(--wrong)}.psle-module__QiRKhW__answerRow{flex-wrap:wrap;align-items:center;gap:8px;margin:12px 0 0;display:flex}.psle-module__QiRKhW__unit{color:var(--ink-75);font-weight:700}.psle-module__QiRKhW__msg{border-radius:var(--ug-radius-sm);margin:12px 0 0;padding:12px 14px;font-size:15px;line-height:1.5}.psle-module__QiRKhW__msg[data-tone=right]{background:var(--correct-tint);color:var(--ink);box-shadow:inset 4px 0 0 var(--correct)}.psle-module__QiRKhW__msg[data-tone=retry]{background:var(--retry-tint);color:var(--retry-ink);box-shadow:inset 4px 0 0 var(--retry-border)}.psle-module__QiRKhW__msg[data-tone=wrong]{background:var(--wrong-tint);color:var(--wrong-ink);box-shadow:inset 4px 0 0 var(--wrong)}.psle-module__QiRKhW__solution{counter-reset:step;gap:10px;margin:14px 0 0;padding:0;list-style:none;display:grid}.psle-module__QiRKhW__step{border-radius:var(--ug-radius-sm);background:var(--gray-99);box-shadow:inset 0 0 0 1px var(--ink-10);gap:8px;padding:12px 14px;font-size:15px;line-height:1.55;display:grid}.psle-module__QiRKhW__stepMath{overflow-x:auto}.psle-module__QiRKhW__markLine{background:var(--white);box-shadow:inset 0 0 0 1px var(--border);border-radius:10px;grid-template-columns:auto minmax(0,1fr);gap:4px 10px;padding:8px 10px;font-size:14px;line-height:1.45;display:grid}.psle-module__QiRKhW__markLine input{width:18px;height:18px;margin-top:3px}.psle-module__QiRKhW__markCode{color:var(--green-text);font-weight:750}.psle-module__QiRKhW__markLost{color:var(--ink-60);grid-column:2}.psle-module__QiRKhW__summary{margin:14px 0 0;font-size:15px;font-weight:700}.psle-module__QiRKhW__model{border-radius:var(--ug-radius-sm);background:var(--tint-blue);margin:12px 0 0;padding:12px 14px;font-size:15px;line-height:1.55}.psle-module__QiRKhW__footer{background:var(--white);box-shadow:inset 0 1px 0 var(--border);padding:32px 0 48px}.psle-module__QiRKhW__footerInner{gap:12px;max-width:1120px;margin:0 auto;padding:0 16px;display:grid}.psle-module__QiRKhW__footerLinks{flex-wrap:wrap;gap:4px 16px;display:flex}.psle-module__QiRKhW__footerLinks a{color:var(--ink-75);font-size:14px;font-weight:600;text-decoration:none}.psle-module__QiRKhW__footerLinks a:hover{color:var(--ink);text-decoration:underline}.psle-module__QiRKhW__footerNote{max-width:80ch;color:var(--ink-60);margin:0;font-size:13px;line-height:1.5}@media (max-width:760px){.psle-module__QiRKhW__hero{grid-template-columns:1fr;padding:36px 16px 28px}.psle-module__QiRKhW__grid2,.psle-module__QiRKhW__grid3,.psle-module__QiRKhW__cards{grid-template-columns:1fr}.psle-module__QiRKhW__headerInner{flex-wrap:wrap}.psle-module__QiRKhW__item{padding:16px}.psle-module__QiRKhW__partHead{grid-template-columns:auto minmax(0,1fr)}.psle-module__QiRKhW__partMarks{grid-column:2}}.psle-module__QiRKhW__srOnly{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}