@font-face{font-family:nunito;src:url(../media/nunito_latin_wght_normal-s.p.1wzrasd95pxo_.woff2)format("woff2");font-display:swap;font-weight:400 1000}@font-face{font-family:nunito Fallback;src:local(Arial);ascent-override:103.02%;descent-override:35.97%;line-gap-override:0.0%;size-adjust:98.13%}.CCFsTa_className{font-family:nunito,nunito Fallback}.CCFsTa_variable{--font-nunito:"nunito", "nunito Fallback"}
@layer theme{:root,:host{--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-font-family:var(--font-nunito);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.hidden{display:none}.inline{display:inline}.table{display:table}}:root{--ink:#142957;--muted:#52617f;--blue:#1263dc;--sky:#edf6ff;--orange:#ff8707;--line:#dce7f5;--radius:20px;--shadow:0 8px 28px #28589b0b}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{color:var(--ink);font-family:var(--font-nunito), sans-serif;-webkit-font-smoothing:antialiased;background:#fff;margin:0;font-size:16px;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,summary,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}button,input,select{color:var(--ink)}h1,h2,h3,p{margin:0}h1,h2,h3{letter-spacing:-.035em;line-height:1.2}h1{font-weight:900}h2,h3{font-weight:850}p{line-height:1.65}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,select:focus-visible{outline-offset:5px;outline:3px solid #255ee7}button{border:0}svg.art{flex-shrink:0;width:80px;height:80px}.skip-link{z-index:100;border:2px solid var(--blue);background:#fff;border-radius:10px;padding:12px 20px;position:fixed;top:-100px;left:20px}.skip-link:focus{top:8px}.site-header{z-index:30;background:#ffffffef;border-bottom:1px solid #e2ecf8;height:88px;position:relative}.nav-wrap{justify-content:space-between;align-items:center;gap:28px;max-width:1370px;height:100%;margin:auto;padding:0 36px;display:flex}.brand{letter-spacing:-1.4px;color:#0877da;white-space:nowrap;align-items:center;gap:9px;font-size:31px;font-weight:950;display:flex}.brand .art{width:65px;height:65px}.dot-net{color:#c36900}.nav-wrap nav{align-items:center;gap:30px;height:100%;font-size:14px;font-weight:750;display:flex}.nav-wrap nav>a{align-items:center;gap:8px;min-height:44px;display:flex}.nav-wrap nav>a:hover,.nav-menu summary:hover{color:var(--blue)}.nav-home{color:#104fc4}.nav-home>span{font-size:25px;line-height:1}.nav-menu{position:relative}.nav-menu summary{cursor:pointer;padding:15px 0;list-style:none}.nav-menu summary::-webkit-details-marker{display:none}.nav-menu summary>span{margin-left:5px}.nav-menu>div{border:1px solid var(--line);background:#fff;border-radius:15px;flex-direction:column;width:210px;padding:10px;display:flex;position:absolute;top:55px;left:-22px;box-shadow:0 15px 40px #173e7c24}.nav-menu>div a{border-radius:8px;padding:10px}.nav-menu>div a:hover{background:var(--sky)}.progress-link{white-space:nowrap;background:linear-gradient(#fff,#f6f9ff);border:1.5px solid #cbdafa;border-radius:12px;align-items:center;gap:9px;min-height:44px;padding:9px 15px;font-size:14px;font-weight:800;display:flex;box-shadow:0 3px #edf1f9}.progress-link>span{color:#ffbd21;-webkit-text-stroke:1px #e2940a;font-size:25px;line-height:1}.hero{background:linear-gradient(110deg,#eff7ff 0%,#f5faff 47%,#e5f3ff 100%);position:relative;overflow:hidden}.hero:before{content:"";background:#d9edff;border-radius:50%;width:250px;height:250px;position:absolute;bottom:-130px;left:-180px}.hero:after{content:"";background:#fff;border-radius:50% 45% 0 0;width:110%;height:24px;position:absolute;bottom:-1px;left:-5%}.hero-inner{grid-template-columns:1fr 1.1fr;align-items:center;max-width:1370px;min-height:408px;margin:auto;padding:34px 36px 20px;display:grid;position:relative}.hero-copy{z-index:2;padding:2px 0 24px}.eyebrow{letter-spacing:1.7px;color:#41628f;font-size:11px;font-weight:900;line-height:1.5;display:block}.hero-copy .eyebrow{letter-spacing:1.35px;align-items:center;gap:8px;margin-bottom:15px;font-size:10px;display:flex}.hero-copy .eyebrow>span{background:#f6ae2c;border-radius:50%;width:6px;height:6px}.hero h1{letter-spacing:-1.9px;color:#152c67;white-space:nowrap;font-size:clamp(36px,3.55vw,53px);line-height:1.13}.hero h1>span{color:#087bd9}.hero-copy>p{color:#233c6b;margin:17px 0 21px;font-size:19px;font-weight:650;line-height:1.45}.button{border:1px solid #0000;border-radius:12px;justify-content:center;align-items:center;gap:12px;min-height:46px;padding:11px 21px;font-size:14px;font-weight:850;transition:transform .18s,box-shadow .18s;display:inline-flex}.button:hover{transform:translateY(-2px)}.orange{color:#fff;text-shadow:0 1px 2px #97410055;background:linear-gradient(100deg,#ff970e,#fb7900);border-color:#ec7804;box-shadow:0 4px #e66b0920,0 6px 15px #fb870323}.hero-cta{border-radius:15px;gap:13px;min-height:55px;padding:14px 25px;font-size:17px}.hero-cta>span:last-child{margin-left:8px;font-size:23px}.primary{color:#fff;background:#1263dc;box-shadow:0 4px #0b4eb716}.secondary{color:#1d4fb1;background:#fff;border-color:#c9dafa;box-shadow:0 3px #1e63cf08}.trust{color:#415a77;align-items:center;gap:20px;margin-top:22px;font-size:12px;font-weight:750;display:flex}.trust>span{align-items:center;gap:5px;display:flex}.trust i{color:#218c69;background:#dff2e9;border-radius:50%;justify-content:center;align-items:center;width:17px;height:17px;font-size:11px;font-style:normal;display:inline-flex}.hero-art{align-self:end;height:360px;margin-left:-16px;margin-right:-20px;position:relative}.hero-art>img{object-fit:contain;object-position:center bottom;width:100%;height:100%}.art-caption{color:#668aa4;font-size:10px;font-style:italic;font-weight:750;position:absolute;bottom:0;right:10%}.home-content{max-width:1370px;margin:auto;padding:20px 36px 50px}.subjects{grid-template-columns:repeat(5,1fr);gap:15px;display:grid}.subject-card{text-align:center;border:1.5px solid;border-radius:18px;min-height:176px;padding:16px 10px;position:relative;overflow:hidden;box-shadow:0 5px 14px #205cb305}.subject-card:after{content:"";pointer-events:none;background:#ffffff32;border-radius:50%;width:130px;height:130px;position:absolute;top:-65px;right:-35px}.subject-card .art{filter:drop-shadow(0 5px 2px #2d476316);width:72px;height:72px;margin:0 auto 8px}.subject-card h2{letter-spacing:-.6px;margin-bottom:5px;font-size:19px}.subject-card p{font-size:12px;font-weight:650}.subject-card p>span{margin-left:9px}.math-card{background:linear-gradient(135deg,#d9f2ff,#c0e2ff);border-color:#97d5ff}.math-card:hover{border-color:#127be7;transform:translateY(-3px)}.language-card{background:linear-gradient(135deg,#f1ebff,#e5e1fd);border-color:#d6c7ff}.english-card{background:linear-gradient(135deg,#ebf8e9,#d8f0dc);border-color:#bce4bf}.science-card{background:linear-gradient(135deg,#fff1c5,#ffe1a2);border-color:#ffcf76}.social-card{background:linear-gradient(135deg,#e0f9f2,#bfeee3);border-color:#a5e4d6}.soon{color:#465872;letter-spacing:.2px;z-index:1;background:#ffffffb5;border-radius:20px;padding:2px 7px;font-size:8px;font-weight:900;position:absolute;top:9px;right:9px}.grade-picker{background:#f0f5ff;border:1px solid #e1ebfc;border-radius:17px;align-items:center;gap:22px;margin-top:20px;padding:12px 21px;display:flex}.grade-title{white-space:nowrap;align-items:center;gap:10px;display:flex}.grade-title .art{width:49px;height:49px}.grade-title h2{font-size:17px}.grade-links{flex:1;grid-template-columns:repeat(6,1fr);gap:12px;display:grid}.grade-links>a,.future-grade{text-align:center;white-space:nowrap;background:#fff;border:1.5px solid #cddcfa;border-radius:30px;justify-content:center;align-items:center;gap:4px;min-height:42px;padding:7px 10px;font-size:13px;font-weight:800;display:flex}.grade-links>a:hover,.grade-links>a.remembered{color:#fff;background:#1263dc;border-color:#1263dc}.future-grade{color:#66728a;background:#f5f7fc;border-color:#dfe6f3;flex-direction:column;gap:0;padding:4px;font-size:11px;position:relative}.future-grade small{color:#62718b;font-size:8px;font-weight:650;line-height:1.2}.feature-grid{grid-template-columns:repeat(3,1fr);gap:18px;margin-top:20px;display:grid}.feature-card{border:1px solid;border-radius:18px;align-items:flex-start;gap:10px;min-height:160px;padding:23px 16px;display:flex;position:relative;overflow:hidden}.feature-card>.art{width:57px;height:65px;margin-left:-3px}.daily-card{background:#fff6e5;border-color:#f7e8c9}.print-card{background:#efedff;border-color:#e1dbfc}.progress-card{background:#edf7ef;border-color:#d8ebdc}.card-kicker{letter-spacing:.8px;color:#55627c;margin-bottom:7px;font-size:8px;font-weight:900;display:block}.feature-card h2{z-index:2;margin-bottom:6px;font-size:21px;position:relative}.feature-card p{font-size:12px;font-weight:600;line-height:1.5}.text-link{color:#1457c9;align-items:center;gap:12px;min-height:44px;font-size:13px;font-weight:850;display:inline-flex}.text-link:hover{text-underline-offset:4px;text-decoration:underline}.feature-card .text-link{min-height:30px;margin-top:6px;font-size:13px}.calendar{text-align:center;background:#fff;border:2px solid #b6c9ee;border-bottom-width:5px;border-radius:10px;flex-shrink:0;width:69px;height:83px;position:relative;transform:rotate(-7deg);box-shadow:4px 6px #e5b64c28}.calendar:before,.calendar:after{content:"";z-index:2;background:#aab3d7;border:1.5px solid #606b93;border-radius:5px;width:5px;height:14px;position:absolute;top:-8px}.calendar:before{left:14px}.calendar:after{right:14px}.calendar-top{background:#af8bd2;border-bottom:2px solid #8966af;border-radius:7px 7px 0 0;height:18px}.calendar strong{letter-spacing:-2px;color:#1b438d;margin-top:4px;font-size:31px;line-height:1.2;display:block}.calendar>span{color:#2753a0;font-size:11px;font-weight:950;line-height:1.1;display:block}.feature-card>.calendar{position:absolute;bottom:26px;right:16px}.daily-card>div:not(.calendar){padding-right:58px}.pencil{color:#a59bdd;opacity:.45;font-size:90px;line-height:1;position:absolute;bottom:-2px;right:4px;transform:rotate(-17deg)}.medal{color:#fff7c9;text-shadow:1px 2px #d9911b;background:#ffcf42;border:6px double #eaa517;border-radius:50%;justify-content:center;align-items:center;width:65px;height:65px;font-size:33px;display:flex;position:absolute;bottom:25px;right:15px;transform:rotate(12deg);box-shadow:0 5px #c68d2330}.progress-card>div{padding-right:45px}.how-strip{background:#edf6ff;border:1.5px solid #cce3ff;border-radius:17px;justify-content:space-between;align-items:center;gap:15px;margin-top:22px;padding:17px 22px;display:flex}.how-strip>div:first-child h2{color:#163f8b;font-size:24px}.how-strip>div:first-child p{color:#4d6487;margin-top:5px;font-size:11px}.how-step{align-items:center;gap:10px;font-size:12px;font-weight:750;line-height:1.6;display:flex}.how-step .art{width:52px;height:52px}.how-step b{color:#fff;background:#1666d8;border-radius:50%;justify-content:center;align-items:center;width:17px;height:17px;margin-right:3px;font-size:10px;display:inline-flex}.step-arrow{color:#2a6fd3;font-size:25px}.section-space{margin-top:65px}.section-heading{justify-content:space-between;align-items:flex-end;gap:25px;margin-bottom:25px;display:flex}.section-heading h2{margin-top:10px;font-size:28px}.popular-grid{grid-template-columns:repeat(4,1fr);gap:17px;display:grid}.popular-card{border:1px solid var(--line);border-radius:17px;padding:23px 20px 22px;transition:box-shadow .2s,transform .2s;position:relative}.popular-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.topic-symbol{color:#1776ce;background:#e7f2ff;border-radius:14px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:18px;font-size:30px;font-weight:900;display:inline-flex}.topic-symbol.purple{color:#8a5ac9;background:#f0eaff}.topic-symbol.green{color:#268c66;background:#e5f5ed}.topic-symbol.amber{color:#c58019;background:#fff2d3}.popular-card h3{margin-bottom:8px;padding-right:10px;font-size:17px}.popular-card p{color:var(--muted);font-size:11px}.round-arrow{color:#6384b1;border:1px solid #dce7f5;border-radius:50%;justify-content:center;align-items:center;width:27px;height:27px;display:flex;position:absolute;top:25px;right:19px}.family-section{background:#f5f9ff;border:1px solid #e5eefb;border-radius:24px;grid-template-columns:.8fr 1.2fr;align-items:center;gap:70px;padding:40px 7%;display:grid}.family-section h2{margin:10px 0 15px;font-size:32px}.family-section p{color:#536584;max-width:500px;font-size:14px}.family-art{background:#e4eeff;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:230px;height:230px;margin:auto;display:flex;position:relative}.family-art>.art{width:130px;height:130px;transform:rotate(-10deg)}.mini-star{color:#f4b632;font-size:42px;position:absolute;top:10px;right:20px}.family-note{color:#456593;text-align:center;font-size:16px;font-weight:850;transform:rotate(-5deg)}.family-checks{color:#376e5b;gap:17px;margin-top:18px;font-size:11px;font-weight:800;display:flex}.family-section .text-link{margin-top:8px}.faq-section{grid-template-columns:.7fr 1.3fr;gap:70px;padding:0 25px;display:grid}.faq-section h2{margin:12px 0;font-size:32px}.faq-section>div>p{color:var(--muted);font-size:14px}.faq-list details{border-bottom:1px solid var(--line);padding:4px 0}.faq-list summary{cursor:pointer;justify-content:space-between;align-items:center;gap:20px;min-height:59px;font-size:14px;font-weight:850;list-style:none;display:flex}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary>span{color:#7091c1;font-size:22px;font-weight:500}.faq-list details[open] summary>span{transform:rotate(45deg)}.faq-list details>p{color:var(--muted);padding-bottom:20px;font-size:14px}.site-footer{background:#f1f7fe;border-top:1px solid #dbe9fb;margin-top:50px;padding:42px 36px 20px;position:relative}.site-footer:before{content:"";clip-path:polygon(0 50%,12% 0,26% 70%,40% 15%,55% 100%,70% 30%,87% 0,100% 60%,100% 100%,0 100%);background:linear-gradient(90deg,#6bc8ff,#329ef1,#9edaff);height:10px;position:absolute;top:-10px;left:0;right:0}.footer-inner,.footer-bottom{justify-content:space-between;align-items:center;gap:30px;max-width:1298px;margin:auto;display:flex}.brand.small{font-size:24px}.brand.small .art{width:47px;height:47px}.footer-inner p{color:#54708e;margin-top:7px;font-size:12px}.footer-note{color:#607b99;margin-top:8px;font-size:10px;display:block}.footer-links{flex-wrap:wrap;gap:23px;font-size:12px;font-weight:750;display:flex}.footer-links>a{align-items:center;min-height:44px;display:flex}.footer-bottom{color:#526682;border-top:1px solid #dbe5f1;margin-top:30px;padding-top:18px;font-size:10px}.page-container{max-width:1250px;min-height:60vh;margin:0 auto;padding:22px 36px 65px}.page-container.narrow{max-width:940px}.breadcrumbs{color:#526782;flex-wrap:wrap;align-items:center;gap:7px;min-height:32px;margin-bottom:28px;font-size:11px;display:flex}.breadcrumbs a:hover{text-decoration:underline}.breadcrumbs>span{align-items:center;gap:7px;display:inline-flex}.crumb-divider{color:#93a8c1;margin:0 3px}.page-intro{margin:18px 0 35px}.page-intro h1{letter-spacing:-1.4px;margin:12px 0;font-size:42px}.page-intro p{color:var(--muted);max-width:700px;font-size:17px}.illustrated-intro{background:#f0f7ff;border:1px solid #dfebfb;border-radius:23px;justify-content:space-between;align-items:center;padding:35px;display:flex}.illustrated-intro>.art{width:115px;height:115px;margin-left:25px}.course-grid{grid-template-columns:repeat(2,1fr);gap:22px;display:grid}.course-card{border:1px solid var(--line);border-radius:20px;align-items:center;gap:25px;min-height:180px;padding:30px;transition:transform .2s;display:flex;position:relative}.course-card:hover,.table-card:hover{transform:translateY(-3px)}.course-1{background:#edf7ff;border-color:#c9e5ff}.course-2{background:#f3efff;border-color:#dfd4fc}.course-3{background:#eef9f0;border-color:#d3ebd7}.course-4{background:#fff7e7;border-color:#f5e3bf}.course-number{color:#197ace;letter-spacing:-5px;font-size:65px;font-weight:950;line-height:1}.course-number small{vertical-align:top;letter-spacing:-2px;font-size:30px}.course-card h2{margin-bottom:9px;font-size:22px}.course-card p{color:var(--muted);font-size:13px}.wide-callout{background:#f7faff;border:1px solid #deebfb;border-radius:19px;align-items:center;gap:22px;margin:30px 0;padding:23px 28px;display:flex}.wide-callout .art{width:65px;height:65px}.wide-callout h2{margin-bottom:6px;font-size:22px}.wide-callout p{color:var(--muted);font-size:14px}.wide-callout>.button{white-space:nowrap;margin-left:auto}.quiet-note{color:var(--muted);margin:20px 0;font-size:12px}.topic-card-grid{grid-template-columns:repeat(3,1fr);gap:22px;display:grid}.topic-card{border:1px solid;border-radius:20px;padding:28px;display:block}.topic-card h2{margin-bottom:12px;font-size:25px}.topic-card p{color:var(--muted);margin-bottom:18px;font-size:14px}.tables-grid{grid-template-columns:repeat(5,1fr);gap:18px;display:grid}.table-card{text-align:center;border:1px solid;border-radius:20px;flex-direction:column;gap:5px;padding:25px 15px;transition:transform .2s;display:flex}.table-card>span:first-child{letter-spacing:1.5px;font-size:10px;font-weight:850}.table-card>strong{font-size:67px;font-weight:950;line-height:1.3}.table-card>span:last-child{font-size:11px;font-weight:800}.topic-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px;display:flex}.topic-heading h1{margin:10px 0;font-size:36px}.topic-heading p{color:var(--muted);max-width:680px;font-size:14px}.topic-heading>.button{white-space:nowrap}.topic-layout{grid-template-columns:minmax(0,1fr) 260px;gap:35px;display:grid}.practice-widget{background:#fff;border:1.5px solid #d5e4f9;border-radius:23px;min-height:510px;padding:25px;box-shadow:0 7px 30px #28589b08}.practice-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:15px;display:flex}.mode-switch{background:#f0f4fb;border-radius:12px;gap:3px;padding:4px;display:flex}.mode-switch>button{color:#576b8b;background:0 0;border-radius:9px;min-height:38px;padding:8px 13px;font-size:12px;font-weight:800}.mode-switch>button.active{color:#155bc3;background:#fff;box-shadow:0 2px 5px #244c7a13}.practice-level{color:#536c8c;font-size:10px}.session-progress{margin:22px 0 25px}.session-progress>span{color:#536d91;justify-content:space-between;margin-bottom:9px;font-size:11px;font-weight:750;display:flex}.session-progress progress{appearance:none;background:#edf2fa;border:0;border-radius:20px;width:100%;height:7px;display:block;overflow:hidden}.session-progress progress::-webkit-progress-bar{background:#edf2fa}.session-progress progress::-webkit-progress-value{background:#419bfa;border-radius:20px}.question-heading{color:#557197;justify-content:space-between;align-items:center;font-size:13px;font-weight:750;display:flex}.subtle-button{color:#2f629d;background:0 0;min-height:44px;padding:7px;font-size:11px;font-weight:750}.operation{text-align:center;letter-spacing:1px;color:#183f7e;font-variant-numeric:tabular-nums;margin:15px 0 25px;font-size:53px;font-weight:900;line-height:1.25}.operation>span{color:#607fa7}.answer-field{justify-content:center;align-items:center;gap:18px;display:flex}.answer-field label{font-size:12px;font-weight:800}.answer-field input{text-align:center;outline-offset:3px;background:#fbfdff;border:2px solid #b4cff3;border-radius:12px;width:125px;min-height:55px;padding:8px 12px;font-size:27px;font-weight:850}.answer-field input:disabled{color:#405b7f;background:#f3f7fc}.answer-options{text-align:center;border:0;margin:0;padding:0}.answer-options legend{width:100%;margin-bottom:12px;font-size:12px;font-weight:800}.answer-options label{cursor:pointer;border:2px solid #d9e4f4;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-width:85px;min-height:50px;margin:4px;padding:8px 13px;font-size:15px;font-weight:800;display:inline-flex}.answer-options label.selected{background:#e8f2ff;border-color:#478fe7}.answer-options input{accent-color:#1263dc;width:16px;height:16px}.feedback{min-height:38px;margin-top:17px;font-size:13px}.feedback:not(:empty){border-radius:12px;padding:14px}.feedback.correct{color:#206647;background:#eaf8ee}.feedback.incorrect{color:#745018;background:#fff5df}.feedback.pending{color:#365b8d;background:#eff5fe}.feedback summary{cursor:pointer;min-height:35px;margin-top:9px;font-weight:750}.feedback p{font-size:12px}.practice-actions{justify-content:space-between;gap:18px;margin-top:14px;display:flex}.practice-actions>.button{min-width:155px}.practice-footer{color:#536b8a;border-top:1px solid #edf1f7;justify-content:space-between;align-items:center;gap:12px;margin-top:22px;padding-top:13px;font-size:9px;display:flex}.hint{color:#775d29;background:#fff9e8;border-radius:9px;margin-top:12px;padding:10px 14px;font-size:12px}.finish-training{text-align:center;background:0 0;width:100%;min-height:44px;margin-top:13px;font-size:11px;display:block}.column-operation{font-variant-numeric:tabular-nums;letter-spacing:6px;flex-direction:column;align-items:flex-end;max-width:180px;margin:10px auto 20px;font-size:40px;font-weight:850;line-height:1.3;display:flex}.column-operation>span{text-align:right;width:100%;position:relative}.column-operation i{font-style:normal;position:absolute;left:0}.column-operation>div{background:#355e94;width:100%;height:3px;margin-top:5px}.results{text-align:center;padding:30px}.results>.art{width:90px;height:90px;margin:0 auto 12px}.results h2{margin:12px 0;font-size:29px}.results>p{color:var(--muted);font-size:14px}.result-stats{grid-template-columns:repeat(4,1fr);gap:12px;margin:28px 0;display:grid}.result-stats>div{background:#f6faff;border:1px solid #dce8fa;border-radius:14px;padding:17px 5px}.result-stats strong{color:#1968c4;font-size:25px;display:block}.result-stats span{color:#536d91;font-size:10px}.button-row{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:25px;display:flex}.review-errors{text-align:left;background:#fff9ee;border-radius:12px;margin-top:20px;padding:15px}.review-errors summary{cursor:pointer;min-height:30px;font-size:13px;font-weight:800}.review-errors>div{border-top:1px solid #eaddc4;padding:10px 0}.review-errors h3{margin:6px 0;font-size:17px}.review-errors p{font-size:12px}.sidebar-card{background:#fff8e7;border:1px solid #f3e5bc;border-radius:18px;margin-bottom:30px;padding:22px}.sidebar-star{color:#f4b52a;font-size:40px;line-height:1}.sidebar-card h2{margin:10px 0;font-size:18px}.sidebar-card p{color:#786744;font-size:13px}.topic-sidebar>h2{margin-bottom:14px;font-size:16px}.related-link{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:15px;min-height:50px;padding:12px 0;font-size:12px;font-weight:750;display:flex}.related-link:hover{color:var(--blue)}.topic-sidebar>.button{width:100%;margin-top:22px;font-size:12px}.editorial{margin-top:42px}.editorial h2{margin:30px 0 18px;font-size:25px}.editorial>p{color:#526581;margin-bottom:16px;font-size:14px;line-height:1.85}.example-grid{grid-template-columns:repeat(3,1fr);gap:15px;display:grid}.example-grid>div{background:#f5f9ff;border:1px solid #dfebfb;border-radius:14px;padding:18px}.example-grid h3{letter-spacing:0;margin-bottom:10px;font-size:19px}.example-grid p{color:#546b8e;font-size:12px}.daily-intro{justify-content:space-between;align-items:center;gap:25px;display:flex}.daily-intro .calendar{width:85px;height:105px;margin-right:20px}.daily-intro .calendar strong{font-size:43px}.daily-intro .calendar>span{font-size:14px}.daily-loading{color:var(--muted);justify-content:center;align-items:center;display:flex}.sheet-controls{background:#f0f6ff;border:1px solid #dbe8fc;border-radius:20px;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:25px;padding:25px;display:grid}.sheet-controls label{flex-direction:column;gap:7px;font-size:12px;font-weight:800;display:flex}.sheet-controls select,.sheet-controls input{background:#fff;border:1px solid #c7d8ef;border-radius:10px;width:100%;min-height:44px;padding:10px 12px;font-size:14px}.sheet-toolbar{justify-content:space-between;align-items:center;gap:15px;margin:20px 0;display:flex}.sheet-toolbar p{color:var(--muted);font-size:12px}.sheet-preview{background:#f0f3f8;border-radius:20px;padding:30px}.paper{background:#fff;max-width:800px;min-height:750px;margin:auto;padding:40px;box-shadow:0 4px 15px #253f7110}.paper+.paper{margin-top:25px}.paper-header{border-bottom:2px solid #a9c2e4;justify-content:space-between;align-items:center;padding-bottom:16px;display:flex}.paper-header h2{font-size:23px}.paper-header span{color:#526986;font-size:12px}.paper-identification{justify-content:space-between;gap:20px;margin:22px 0;font-size:13px;display:flex}.paper-directions{color:#546780;font-size:12px}.sheet-exercises{grid-template-columns:repeat(3,1fr);gap:34px 23px;margin:35px 0;display:grid}.sheet-exercise>small{color:#536d8d;font-size:10px}.sheet-exercise>p{white-space:nowrap;font-size:24px;font-weight:800;line-height:2}.sheet-exercise>div{border-bottom:1px dashed #bac8da;width:90%;height:40px}.paper-footer{color:#5c708c;border-top:1px solid #dce5f1;justify-content:space-between;gap:10px;margin-top:40px;padding-top:12px;font-size:9px;display:flex}.solution-grid{grid-template-columns:repeat(2,1fr);gap:20px;margin-top:35px;display:grid}.solution-grid p{font-size:17px}.solution-grid small{color:#536782;margin-right:7px;font-size:10px}.status-message{color:#315680;background:#eaf3ff;border-radius:10px;margin-top:15px;padding:12px 15px;font-size:13px}.progress-summary{grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:30px;display:grid}.stat-card{border:1px solid var(--line);background:#f7fbff;border-radius:18px;padding:24px}.stat-card>span{color:#526782;font-size:12px;font-weight:800;display:block}.stat-card>strong{letter-spacing:-1px;font-size:36px;font-weight:950;line-height:1.7}.stat-card>small{color:#587496;font-size:10px;display:block}.progress-empty{background:#fff8e7;border:1px solid #f1e4c7;border-radius:20px;align-items:center;gap:28px;padding:25px 30px;display:flex}.progress-empty h2{margin-bottom:8px;font-size:23px}.progress-empty p{color:#6d6958;font-size:14px}.progress-empty .button{white-space:nowrap;margin-left:auto}.progress-section{margin-top:40px}.progress-section>h2{margin-bottom:22px;font-size:25px}.badges-grid{grid-template-columns:repeat(6,1fr);gap:15px;display:grid}.badge-card{text-align:center;border:1px solid var(--line);background:#f6f8fc;border-radius:17px;padding:22px 10px}.badge-icon{color:#6b7f9d;background:#e6ebf3;border:4px double #bcc9da;border-radius:50%;justify-content:center;align-items:center;width:60px;height:60px;margin:0 auto 14px;font-size:28px;display:flex}.badge-card.unlocked{background:#fffaec;border-color:#f0dc9b}.badge-card.unlocked .badge-icon{color:#94601c;background:#ffdf68;border-color:#e7b42a}.badge-card h3{letter-spacing:0;margin-bottom:5px;font-size:12px}.badge-card p{color:#536780;font-size:10px}.topic-progress-list{border:1px solid var(--line);border-radius:17px;overflow:hidden}.topic-progress-row{border-bottom:1px solid #e8eff9;justify-content:space-between;align-items:center;gap:20px;padding:16px 22px;font-size:13px;display:flex}.topic-progress-row:last-child{border:0}.topic-progress-row strong{color:#b17b05;letter-spacing:3px;font-size:20px}.topic-progress-row small{color:#5e7493;font-size:10px;display:block}.data-settings{border:1px solid var(--line);border-radius:18px;padding:25px}.data-settings>p{color:var(--muted);font-size:13px}.data-settings .button-row{justify-content:flex-start}.import-button{cursor:pointer}.danger-button{color:#8f4650;background:#fff;border:1px solid #dbbbc0}.legal-copy{max-width:850px}.legal-copy h1{margin-bottom:20px;font-size:38px}.legal-copy h2{margin:30px 0 12px;font-size:22px}.legal-copy p{color:#526581;margin-bottom:15px;font-size:15px}.legal-copy a{color:var(--blue);text-decoration:underline}.legal-notice{color:#705a24;background:#fff7df;border:1px solid #ecdba3;border-radius:14px;margin-bottom:30px;padding:20px;font-size:14px}.legal-fields{border:1px solid var(--line);border-radius:15px;padding:20px}.legal-fields>div{grid-template-columns:170px 1fr;padding:8px 0;font-size:14px;display:grid}.legal-fields dt{font-weight:800}.legal-fields dd{color:var(--muted);margin:0}.not-found{text-align:center;padding:70px 25px}.not-found .art{width:120px;height:120px;margin:auto}.not-found h1{margin:20px 0;font-size:42px}.not-found p{margin-bottom:25px}@media (min-width:1450px){.hero-inner{min-height:425px}.hero-art{height:380px}.home-content{padding-top:23px}.subject-card{min-height:185px}.feature-card{min-height:168px}}@media (max-width:1120px){.nav-wrap{gap:20px;padding:0 25px}.brand{font-size:27px}.brand .art{width:54px;height:54px}.nav-wrap nav{gap:20px}.hero-inner{min-height:380px;padding-left:28px;padding-right:28px}.hero h1{font-size:41px}.hero-copy>p{font-size:17px}.hero-art{height:325px}.hero-copy .eyebrow{font-size:8px}.home-content{padding-left:25px;padding-right:25px}.subject-card h2{font-size:16px}.subject-card p{font-size:10px}.grade-picker{gap:13px;padding:12px}.grade-title h2{font-size:14px}.grade-title .art{width:40px;height:40px}.grade-links{gap:7px}.grade-links>a{padding:7px;font-size:11px}.feature-card{gap:5px;padding:20px 12px}.feature-card>.art{width:43px;height:55px}.feature-card h2{font-size:18px}.feature-card p{font-size:11px}.feature-card .calendar{width:54px;height:72px;right:10px}.calendar strong{font-size:25px}.calendar-top{height:15px}.medal{width:49px;height:49px;font-size:27px;right:7px}.how-strip{gap:8px;padding:16px 18px}.how-strip>div:first-child h2{font-size:21px}.how-strip>div:first-child p{font-size:10px}.how-step{gap:6px;font-size:10px}.how-step .art{width:42px;height:42px}.feature-grid{gap:13px}.section-heading h2{font-size:25px}.topic-layout{grid-template-columns:minmax(0,1fr) 215px;gap:23px}.topic-heading h1{font-size:31px}.practice-widget{padding:20px}.example-grid{grid-template-columns:1fr}.badges-grid{grid-template-columns:repeat(3,1fr)}.family-checks{flex-wrap:wrap;gap:10px}}@media (max-width:850px){.nav-wrap{gap:15px;padding:0 20px}.brand{font-size:24px}.brand .art{width:45px;height:45px}.nav-wrap nav{gap:16px;font-size:12px}.progress-link{padding:7px 10px;font-size:12px}.nav-home>span{display:none}.hero h1{letter-spacing:-1px;font-size:33px}.hero-copy>p{font-size:15px}.hero-cta{min-height:49px;padding:11px 18px;font-size:14px}.hero-inner{min-height:340px;padding-top:25px}.hero-art{height:285px;margin-left:-30px;margin-right:-20px}.trust{gap:10px;margin-top:17px;font-size:10px}.hero-copy .eyebrow{letter-spacing:.7px;font-size:7px}.hero-copy .eyebrow>span{width:4px;height:4px}.art-caption{display:none}.subjects{gap:10px}.subject-card{border-radius:14px;min-height:155px;padding:18px 6px 12px}.subject-card .art{width:57px;height:57px}.subject-card h2{letter-spacing:-.4px;font-size:13px}.subject-card p{font-size:9px}.soon{padding:2px 5px;font-size:6px;top:5px;right:4px}.grade-picker{display:block}.grade-title{margin-bottom:10px}.grade-title .art{width:35px;height:30px}.grade-links>a{font-size:12px}.feature-card>.art{display:none}.feature-card{min-height:155px;padding:20px 14px}.feature-card h2{font-size:18px}.card-kicker{font-size:7px}.how-strip{flex-wrap:wrap;justify-content:space-around;padding:18px 12px}.how-strip>div:first-child{text-align:center;width:100%;margin-bottom:10px}.how-strip>div:first-child p{display:none}.how-step{font-size:11px}.section-space{margin-top:45px}.section-heading{align-items:flex-start}.section-heading h2{font-size:23px}.section-heading>.text-link{white-space:nowrap;font-size:11px}.popular-grid{grid-template-columns:repeat(2,1fr)}.family-section{grid-template-columns:.7fr 1.3fr;gap:30px;padding:30px}.family-art{width:180px;height:180px}.family-art>.art{width:100px;height:100px}.family-note{font-size:13px}.family-section h2{font-size:26px}.faq-section{grid-template-columns:1fr;gap:18px;padding:0}.faq-section h2{font-size:28px}.footer-inner{align-items:flex-start}.footer-links{gap:12px;max-width:280px}.course-card{gap:20px;padding:25px 20px}.course-card h2{font-size:20px}.course-number{font-size:52px}.wide-callout{flex-wrap:wrap}.wide-callout>.button{margin-left:87px}.tables-grid{grid-template-columns:repeat(3,1fr)}.topic-card-grid{gap:15px}.topic-card{padding:20px}.topic-card h2{font-size:22px}.topic-layout{grid-template-columns:1fr}.topic-sidebar{display:none}.topic-heading{flex-direction:column;align-items:flex-start}.topic-heading>.button{min-height:44px;font-size:12px}.progress-summary{gap:12px}.stat-card{padding:16px}.stat-card>strong{font-size:29px}.progress-empty{flex-wrap:wrap}.progress-empty>.button{margin-left:100px}}@media (max-width:600px){.site-header{height:112px}.nav-wrap{flex-wrap:wrap;align-content:space-between;gap:0;padding:6px 16px 0}.brand{height:56px;font-size:25px}.brand .art{width:48px;height:48px}.progress-link{gap:5px;min-height:36px;margin-left:auto;padding:5px 9px;font-size:10px}.progress-link>span{font-size:19px}.nav-wrap nav{order:3;justify-content:space-between;gap:12px;width:100%;height:44px;font-size:11px}.nav-wrap nav>a{min-height:44px}.nav-menu summary{padding:12px 0}.nav-menu>div{top:39px;left:-30px}.hero-inner{text-align:center;flex-direction:column;min-height:0;padding:25px 20px 0;display:flex}.hero-copy{width:100%;padding:0}.hero-copy .eyebrow{letter-spacing:1px;justify-content:center;margin-bottom:11px;font-size:8px}.hero h1{letter-spacing:-1.3px;font-size:clamp(29px,7.7vw,42px);line-height:1.16}.hero-copy>p{max-width:350px;margin:13px auto 17px;font-size:14px}.hero-cta{min-height:48px;padding:11px 21px;font-size:14px}.trust{justify-content:center;gap:16px;margin-top:16px;font-size:10px}.hero-art{width:335px;max-width:100%;height:185px;margin:6px auto 0}.hero:after{height:14px}.home-content{padding:15px 16px 35px}.subjects{grid-template-columns:repeat(2,1fr);gap:10px}.subject-card{min-height:151px;padding:20px 8px 13px}.subject-card .art{width:60px;height:60px;margin-bottom:8px}.subject-card h2{font-size:16px}.subject-card p{font-size:10px}.soon{font-size:7px;top:6px;right:7px}.subject-card:last-child{text-align:left;flex-direction:column;grid-column:span 2;justify-content:center;min-height:95px;padding:15px 20px 15px 104px;display:flex}.subject-card:last-child .art{position:absolute;top:15px;left:22px}.grade-picker{margin-top:16px;padding:13px 12px}.grade-title{gap:7px;margin-bottom:12px}.grade-title h2{font-size:16px}.grade-title .art{width:38px;height:35px}.grade-links{grid-template-columns:repeat(3,1fr);gap:8px}.grade-links>a{min-height:43px;padding:7px 5px;font-size:12px}.future-grade{min-height:43px}.feature-grid{grid-template-columns:1fr;gap:12px;margin-top:16px}.feature-card{gap:15px;min-height:145px;padding:22px 20px}.feature-card>.art{width:56px;height:65px;display:block}.feature-card h2{font-size:21px}.feature-card p{font-size:12px}.card-kicker{margin-bottom:6px;font-size:7px}.feature-card .text-link{min-height:35px;margin-top:5px;font-size:12px}.feature-card>.calendar{width:64px;height:82px;bottom:30px;right:22px}.calendar strong{font-size:31px}.calendar-top{height:18px}.feature-card .pencil{bottom:13px;right:20px}.medal{width:58px;height:58px;font-size:31px;bottom:39px;right:23px}.how-strip{margin-top:17px;padding:23px;display:block}.how-strip>div:first-child{text-align:left;margin-bottom:20px}.how-strip>div:first-child h2{font-size:23px}.how-strip>div:first-child p{font-size:11px;display:block}.how-step{gap:17px;margin:13px 0;font-size:12px}.how-step .art{width:47px;height:47px}.step-arrow,.how-step br{display:none}.section-heading{margin-bottom:19px;display:block}.section-heading h2{margin-top:8px;font-size:25px;line-height:1.2}.section-heading>.text-link{margin-top:7px}.eyebrow{letter-spacing:1.1px;font-size:9px}.section-space{margin-top:38px}.popular-grid{gap:10px}.popular-card{border-radius:15px;padding:18px 14px}.topic-symbol{width:42px;height:42px;margin-bottom:15px;font-size:27px}.popular-card h3{font-size:16px;line-height:1.3}.popular-card p{font-size:10px}.round-arrow{width:23px;height:23px;font-size:12px;top:20px;right:13px}.family-section{flex-direction:column;gap:23px;padding:27px 22px;display:flex}.family-art{width:145px;height:145px}.family-art>.art{width:85px;height:85px}.family-note{font-size:11px}.mini-star{font-size:28px;right:10px}.family-section h2{font-size:28px}.family-section p{font-size:13px}.family-checks{font-size:10px}.faq-section h2{font-size:27px}.faq-list summary{min-height:61px;font-size:13px}.faq-list details>p{font-size:12px}.site-footer{margin-top:25px;padding:28px 20px 20px}.footer-inner{flex-direction:column;gap:20px}.footer-links{gap:15px;max-width:none;font-size:11px}.footer-bottom{margin-top:15px;font-size:9px;line-height:1.8;display:block}.footer-bottom>span{margin-top:6px;display:block}.page-container{padding:16px 16px 40px}.breadcrumbs{gap:4px;margin-bottom:15px;font-size:10px}.breadcrumbs>span{gap:3px}.page-intro{margin:20px 0 25px}.page-intro h1{letter-spacing:-1px;margin:10px 0;font-size:30px}.page-intro p{font-size:14px}.illustrated-intro{padding:22px}.illustrated-intro>.art{display:none}.course-grid{grid-template-columns:1fr;gap:14px}.course-card{gap:23px;min-height:145px;padding:22px}.course-card h2{font-size:20px}.course-card p{font-size:12px}.course-number{font-size:57px}.wide-callout{gap:15px;margin-top:23px;padding:20px}.wide-callout h2{font-size:19px}.wide-callout p{font-size:12px}.wide-callout>.art{width:48px;height:48px}.wide-callout>div{flex:1}.wide-callout>.button{width:100%;margin:0}.topic-card-grid{grid-template-columns:1fr}.topic-card{padding:23px}.topic-card h2{font-size:24px}.topic-card>.topic-symbol{margin-bottom:15px}.tables-grid{grid-template-columns:repeat(3,1fr);gap:10px}.table-card{border-radius:15px;padding:17px 7px}.table-card>strong{font-size:47px}.table-card>span:first-child{letter-spacing:.8px;font-size:7px}.table-card>span:last-child{font-size:8px}.topic-heading{margin-bottom:20px}.topic-heading h1{font-size:28px}.topic-heading p{font-size:13px}.topic-heading>.button{padding:8px 13px;font-size:11px}.practice-widget{border-radius:18px;min-height:490px;padding:16px}.practice-top{gap:9px}.mode-switch{gap:2px;padding:3px}.mode-switch>button{padding:7px 10px;font-size:10px}.practice-level{font-size:9px}.session-progress{margin:17px 0}.question-heading{font-size:11px}.subtle-button{padding:5px;font-size:10px}.operation{margin:20px 0 25px;font-size:39px}.answer-field label{font-size:11px}.answer-field input{width:105px;min-height:52px;font-size:25px}.practice-actions{gap:10px}.practice-actions>.button{min-width:140px;padding:10px 15px;font-size:12px}.practice-footer{gap:8px;font-size:8px}.practice-footer>span:last-child{display:none}.feedback{font-size:12px}.results{padding:22px 15px}.results h2{font-size:25px}.result-stats{gap:7px}.result-stats>div{padding:12px 3px}.result-stats strong{font-size:22px}.result-stats span{font-size:8px}.results .button-row{gap:10px}.results .button-row>.button{font-size:12px}.editorial{margin-top:30px}.editorial h2{font-size:23px}.editorial>p{font-size:13px}.daily-intro{gap:14px}.daily-intro h1{font-size:29px}.daily-intro>.calendar{width:65px;height:85px;margin-right:5px}.daily-intro>.calendar strong{font-size:31px}.sheet-controls{grid-template-columns:repeat(2,1fr);gap:13px;padding:17px}.sheet-controls label{font-size:10px}.sheet-controls input,.sheet-controls select{font-size:12px}.sheet-toolbar{flex-direction:column;align-items:flex-start}.sheet-toolbar .button{width:100%}.sheet-preview{border-radius:10px;padding:10px}.paper{min-height:620px;padding:20px 14px}.paper-header h2{font-size:18px}.paper-header>span{font-size:9px}.paper-identification{flex-wrap:wrap;gap:10px;font-size:10px}.paper-directions{font-size:10px}.sheet-exercises{grid-template-columns:repeat(2,1fr);gap:22px;margin-top:25px}.sheet-exercise>p{font-size:20px}.paper-footer{flex-wrap:wrap;font-size:7px}.solution-grid{gap:15px}.solution-grid p{font-size:13px}.progress-summary{grid-template-columns:repeat(2,1fr);gap:12px}.stat-card{padding:17px}.stat-card>span{font-size:11px}.stat-card>strong{font-size:31px}.progress-empty{gap:17px;padding:22px}.progress-empty>.art{width:55px;height:55px}.progress-empty>div{flex:1}.progress-empty h2{font-size:19px}.progress-empty p{font-size:12px}.progress-empty>.button{width:100%;margin:0;font-size:13px}.badges-grid{grid-template-columns:repeat(2,1fr);gap:10px}.data-settings{padding:20px}.data-settings .button-row{flex-direction:column}.data-settings .button{width:100%;font-size:12px}.legal-copy h1{font-size:31px}.legal-copy h2{font-size:21px}.legal-copy p{font-size:13px}.legal-fields>div{grid-template-columns:1fr;gap:5px;font-size:12px}.legal-notice{font-size:12px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}@page{size:A4;margin:15mm}@media print{body{background:#fff;font-size:11pt}.site-header,.site-footer,.skip-link,.breadcrumbs,.page-intro,.sheet-controls,.sheet-toolbar,.status-message,.no-print{display:none!important}.page-container{max-width:none;margin:0;padding:0}.sheet-preview{background:0 0;padding:0}.paper{box-shadow:none;max-width:none;min-height:0;padding:0}.paper+.paper{break-before:page;margin-top:0}.paper-header h2{font-size:20pt}.paper-header>span{font-size:10pt}.paper-identification{font-size:11pt}.paper-directions{font-size:10pt}.sheet-exercises{grid-template-columns:repeat(3,1fr);gap:11mm 8mm;margin:10mm 0}.sheet-exercise{break-inside:avoid}.sheet-exercise>p{font-size:17pt}.sheet-exercise>div{height:10mm}.paper-footer{margin-top:10mm;font-size:8pt}.solution-grid{grid-template-columns:repeat(3,1fr);gap:8mm;margin-top:10mm}.solution-grid p{font-size:12pt}a{color:inherit}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}.orange{color:#4b2608;text-shadow:none;background:linear-gradient(100deg,#ffae24,#ff8d0b)}.mode-switch>button,.feature-card .text-link,.grade-links>a,.progress-link,.feedback summary,.review-errors summary{min-height:44px}@media print{.sheet-exercises{row-gap:6mm}.sheet-exercise>p{line-height:1.6}.sheet-exercise>div{height:7mm}}.today-practice{background:linear-gradient(110deg,#eef6ff,#f6f2ff);border:1px solid #d3e3f8;border-radius:20px;align-items:center;gap:23px;min-height:150px;margin-bottom:23px;padding:25px 28px;display:flex}.today-icon{color:#9a6400;background:#fff0c8;border:1px solid #efcf79;border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:61px;height:61px;font-size:36px;display:flex}.today-copy{flex:1}.today-copy h2{margin:7px 0;font-size:25px}.today-copy p{color:#506783;max-width:620px;font-size:13px}.today-action{flex-direction:column;align-items:center;display:flex}.today-grades{grid-template-columns:repeat(2,1fr);gap:8px;min-width:200px;display:grid}.today-grades>a{background:#fff;border:1px solid #c6d8f2;border-radius:10px;justify-content:center;align-items:center;gap:5px;min-height:44px;padding:8px 13px;font-size:12px;font-weight:800;display:flex}.today-grades>a:hover{background:#f5faff;border-color:#196ed2}.personal-plan{background:#f7fbff;border:1px solid #d1e2fa;border-radius:23px;padding:29px}.plan-top{justify-content:space-between;align-items:center;gap:25px;display:flex}.plan-top h2{margin-top:9px;font-size:27px}.plan-top label,.grade-filter{flex-direction:column;gap:6px;min-width:125px;font-size:11px;font-weight:800;display:flex}.plan-top select,.grade-filter select,.skill-picker select{background:#fff;border:1px solid #c4d7f2;border-radius:11px;min-height:44px;padding:10px 13px;font-size:13px}.plan-stages{grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0;display:grid}.plan-stages>div{background:#fff;border:1px solid #deebfa;border-radius:15px;padding:20px 17px}.plan-stages>div>span{color:#185ca6;background:#e4f0ff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;margin-bottom:14px;font-size:12px;font-weight:900;display:flex}.plan-stages h3{margin-bottom:9px;font-size:17px}.plan-stages p{color:#526d8b;font-size:12px}.plan-skills{flex-wrap:wrap;gap:8px;display:flex}.plan-skills>span,.practiced-skills>span{color:#355e91;background:#eaf2ff;border-radius:20px;padding:5px 10px;font-size:11px;font-weight:750}.personal-plan>.button-row{justify-content:flex-start}.personal-session-heading{color:#42678f;justify-content:space-between;gap:20px;margin-bottom:18px;font-size:12px;font-weight:800;display:flex}.skill-picker{background:#f5f9ff;border:1px solid #dbe7f7;border-radius:15px;flex-wrap:wrap;align-items:center;gap:15px;margin-bottom:16px;padding:16px 19px;display:flex}.skill-picker label{font-size:12px;font-weight:850}.skill-picker select{flex:1;min-width:180px}.skill-picker p{color:#536b8a;width:100%;font-size:12px}.current-skill{color:#2b598f;background:#f0f6ff;border-radius:9px;justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px;padding:8px 12px;font-size:11px;font-weight:800;display:flex}.current-skill small{color:#4a6889;text-align:right;font-size:9px;font-weight:650}.hint{padding:14px;font-size:12px}.help-note{color:#685c38;padding-top:12px;font-size:10px}.visual-help{color:#334f6b;background:#fffdf7;border:1px solid #ebdfbd;border-radius:13px;margin-top:12px;padding:17px}.visual-help h3{letter-spacing:0;margin:13px 0 10px;font-size:18px}.visual-help p{margin:7px 0;font-size:13px;line-height:1.7}.visual-help-heading{justify-content:space-between;align-items:center;gap:15px;font-size:10px;display:flex}.place-value-grid{justify-content:center;gap:6px;margin:17px 0;display:flex}.place-value-grid>div{text-align:center;background:#f1f5fa;border:2px solid #0000;border-radius:9px;flex-direction:column;gap:3px;width:49px;padding:7px 4px;display:flex}.place-value-grid>div.current{background:#eaf4ff;border-color:#3985d4}.place-value-grid small{font-size:10px;font-weight:800}.place-value-grid strong{font-size:20px;line-height:1.4}.visual-dots{flex-wrap:wrap;justify-content:center;gap:4px;max-width:81px;display:inline-flex}.visual-dots i{background:#167dd4;border:1px solid #0e5797;border-radius:50%;width:13px;height:13px}.visual-dots.dot-orange i{background:#e98d17;border-color:#9c5d0a}.dot-equation{justify-content:center;align-items:center;gap:15px;margin:15px 0;display:flex}.regroup{background:#fff5d8;border:1px solid #edcf83;border-radius:10px;margin:10px 0;padding:12px;font-size:12px}.ten-bundle{border:2px dashed #bb820d;border-radius:8px;margin-right:10px;padding:7px;font-size:11px;font-weight:850;display:inline-flex}.regroup>strong{margin-left:9px}.visual-navigation{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:17px;font-size:12px;display:flex}.visual-navigation .button{min-height:44px;padding:9px 12px;font-size:11px}.visual-navigation button:disabled{opacity:.65}.number-line{width:100%;max-height:115px;margin-top:13px}.equal-groups{flex-wrap:wrap;gap:10px;margin:19px 0;display:flex}.equal-groups>div{text-align:center;background:#eaf3ff;border:1px solid #b8d1ef;border-radius:13px;min-width:80px;max-width:120px;padding:12px}.equal-groups small{color:#3c5c80;margin-bottom:10px;font-size:10px;display:block}.equal-groups strong{font-size:26px}.equal-groups>span{align-self:center;max-width:150px;font-size:12px}.word-problem{margin:15px 0 22px}.problem-story{color:#26466e;font-size:20px;font-weight:750;line-height:1.6}.problem-question{color:#153d7c;margin-top:12px;font-size:19px;font-weight:900}.problem-guide{margin-top:20px}.problem-guide details{background:#f4f8ff;border:1px solid #dce7f6;border-radius:10px;margin-top:8px;padding:0 12px}.problem-guide summary{cursor:pointer;align-items:center;min-height:46px;font-size:12px;font-weight:800;display:flex}.problem-guide details p,.problem-guide li{color:#3d5d83;font-size:12px}.problem-guide ul{margin:5px 0 10px;padding-left:20px;list-style:outside}.problem-guide details>p{padding-bottom:12px}.strategy-options{grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:10px;display:grid}.strategy-options button{background:#fff;border:1px solid #b8cee9;border-radius:9px;min-height:44px;padding:10px;font-size:11px}.strategy-options button.selected{background:#dfecff;border-color:#1c6dce}.reason-check{color:#536d88;margin-top:12px;font-size:11px}.answer-unit{text-align:center;color:#55718f;margin-top:10px;font-size:11px}.retry-button{min-height:44px;margin:4px 0 10px;font-size:12px}.learning-result{text-align:left;background:#f1f8ff;border:1px solid #d9e8fa;border-radius:15px;margin:22px 0;padding:20px}.learning-result h3{margin-bottom:14px;font-size:19px}.learning-result>div{color:#436587;grid-template-columns:repeat(3,1fr);gap:15px;font-size:11px;display:grid}.learning-result strong{color:#205c9b;font-size:24px;display:block}.learning-result>p{color:#4a6889;margin-top:15px;font-size:11px}.practiced-skills{flex-wrap:wrap;gap:7px;display:flex}.learning-summary{grid-template-columns:repeat(3,1fr);gap:15px;margin-bottom:20px;display:grid}.learning-summary>div{background:#f2f8ff;border:1px solid #d7e6f9;border-radius:15px;padding:19px}.learning-summary strong{color:#1b5d9d;font-size:29px;display:block}.learning-summary span{color:#4d6889;font-size:11px}.family-insight{color:#3f5d7f;margin:15px 0 23px;font-size:13px;line-height:1.8}.review-callout{background:#fff8e5;border:1px solid #efdda9;border-radius:16px;flex-wrap:wrap;align-items:center;gap:15px;margin-bottom:20px;padding:22px;display:flex}.review-callout>div{flex:1;min-width:230px}.review-callout h3{margin-bottom:7px;font-size:20px}.review-callout p{color:#685b3e;font-size:12px}.review-callout .button{font-size:12px}.show-new-skills{align-items:center;gap:10px;min-height:48px;margin-bottom:12px;font-size:12px;font-weight:800;display:flex}.show-new-skills input{accent-color:#1263dc;width:19px;height:19px}.skill-progress-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.skill-progress-card{background:#fff;border:1px solid #dae5f3;border-radius:17px;padding:21px}.skill-progress-card h3{margin:13px 0 12px;font-size:19px;line-height:1.3}.skill-progress-card p{color:#526d89;font-size:12px}.skill-progress-card .skill-review-date{margin-top:12px;font-size:10px}.skill-progress-card .text-link{margin-top:8px;font-size:11px}.skill-status{color:#4b6483;background:#edf2f8;border-radius:20px;padding:4px 9px;font-size:9px;font-weight:850;display:inline-block}.skill-status.secure{color:#246746;background:#e1f3e8}.skill-status.review{color:#785614;background:#fff0cb}.skill-status.guided{color:#5a4192;background:#eee9ff}.skill-status.practicing{color:#255994;background:#e3efff}.mastery-method{background:#f6f9fe;border:1px solid #dce7f6;border-radius:14px;margin-top:22px;padding:17px 20px}.mastery-method summary{cursor:pointer;min-height:44px;font-size:13px;font-weight:850}.mastery-method p{color:#4d6685;margin:10px 0;font-size:12px;line-height:1.8}.learning-empty{color:#546e8b;background:#f9fbff;border:1px dashed #c1d4ee;border-radius:14px;padding:22px;font-size:13px}@media (max-width:850px){.today-practice{gap:16px;padding:22px}.today-copy h2{font-size:21px}.today-grades{min-width:165px}.today-grades>a{padding:8px;font-size:10px}.today-icon{width:50px;height:50px;font-size:28px}.today-action .button{padding:10px 13px;font-size:12px}.skill-progress-grid{grid-template-columns:repeat(2,1fr)}.current-skill{font-size:10px}.plan-stages{gap:10px}.plan-stages>div{padding:17px 13px}.plan-stages h3{font-size:15px}}@media (max-width:600px){.nav-wrap nav{gap:7px;font-size:10px}.today-practice{flex-wrap:wrap;gap:13px;min-height:228px;padding:21px 18px}.today-icon{width:43px;height:43px;font-size:26px}.today-copy{flex-basis:calc(100% - 60px)}.today-copy h2{margin:6px 0 8px;font-size:20px}.today-copy p{font-size:11px}.today-grades{grid-template-columns:repeat(4,1fr);width:100%;min-width:0}.today-grades>a{padding:7px 5px;font-size:12px}.today-grades>a>span{display:none}.today-action{align-items:stretch;gap:5px;width:100%}.today-action .text-link{justify-content:center}.personal-plan{padding:20px}.plan-top{flex-direction:column;align-items:flex-start;gap:17px}.plan-top h2{font-size:24px}.plan-top label{width:100%}.plan-stages{grid-template-columns:1fr;gap:10px;margin:22px 0}.plan-stages>div{grid-template-columns:35px 1fr;align-items:center;column-gap:13px;padding:16px 17px;display:grid}.plan-stages>div>span{grid-row:span 2;margin:0}.plan-stages h3{margin-bottom:4px;font-size:16px}.plan-stages p{font-size:11px}.plan-skills>span{font-size:10px}.personal-plan>.button-row>.button{width:100%;font-size:12px}.personal-session-heading{gap:10px;font-size:10px}.skill-picker{gap:8px;padding:14px}.skill-picker label{font-size:12px}.skill-picker select{width:100%;font-size:12px}.skill-picker p{font-size:11px}.current-skill{flex-direction:column;align-items:flex-start;gap:4px;margin-bottom:10px;font-size:11px}.current-skill small{text-align:left;font-size:10px}.topic-page .operation{margin:12px 0 15px}.topic-page .feedback:empty{min-height:12px;margin-top:8px}.word-problem{margin:15px 0}.problem-story,.problem-question{font-size:17px}.problem-guide summary{font-size:10px}.problem-guide details p,.problem-guide li{font-size:11px}.strategy-options button{padding:8px;font-size:10px}.visual-help{padding:13px}.visual-help h3{font-size:16px}.visual-help p{font-size:12px}.visual-help-heading,.visual-help .eyebrow{font-size:8px}.place-value-grid>div{width:43px}.visual-navigation{align-items:stretch}.visual-navigation .button{padding:8px 10px;font-size:10px}.visual-navigation>strong{align-items:center;font-size:11px;display:flex}.hint{padding:12px}.learning-result{padding:16px}.learning-result>div{grid-template-columns:1fr;gap:10px}.learning-result>div>span{align-items:center;gap:8px;display:flex}.learning-result strong{font-size:20px}.learning-summary{gap:9px}.learning-summary>div{padding:14px 10px}.learning-summary strong{font-size:25px}.learning-summary span{font-size:9px;line-height:1.5;display:block}.learning-overview .section-heading{align-items:flex-start;gap:15px;display:flex}.learning-overview .section-heading h2{font-size:23px}.grade-filter{min-width:100px;font-size:10px}.grade-filter select{padding:9px;font-size:11px}.family-insight{font-size:12px}.review-callout{padding:19px}.review-callout>div{flex-basis:100%;min-width:0}.review-callout h3{font-size:19px}.review-callout .button{width:100%;font-size:12px}.show-new-skills{font-size:11px}.skill-progress-grid{grid-template-columns:1fr;gap:12px}.skill-progress-card{padding:20px}.skill-progress-card h3{font-size:20px}.mastery-method{padding:13px 16px}.mastery-method summary{font-size:12px}}.worksheet-presets{background:#f1f7ff;border:1px solid #dce8fa;border-radius:17px;justify-content:space-between;align-items:center;gap:25px;margin:25px 0 20px;padding:22px 25px;display:flex}.worksheet-presets h2{margin-bottom:8px;font-size:22px}.worksheet-presets p{color:#526c8b;font-size:12px}.worksheet-presets .button{white-space:nowrap;font-size:12px}.worksheet-skills{border:1px solid #d9e5f5;border-radius:15px;margin:20px 0;padding:14px 20px}.worksheet-skills summary{cursor:pointer;min-height:44px;font-size:14px;font-weight:850}.worksheet-skills>p{color:#526b89;margin:8px 0 17px;font-size:12px}.worksheet-skills fieldset{border:0;grid-template-columns:repeat(3,1fr);gap:9px;margin:0;padding:0;display:grid}.worksheet-skills fieldset>label{border:1px solid #dce6f4;border-radius:9px;align-items:center;gap:9px;min-height:44px;padding:9px 11px;font-size:12px;display:flex}.worksheet-skills input{accent-color:#1263dc;flex-shrink:0;width:18px;height:18px}.clear-skills{background:0 0;margin-top:12px}.saved-worksheets{border:1px solid #dce7f6;border-radius:15px;margin:20px 0;padding:21px}.save-worksheet{align-items:flex-end;gap:15px;display:flex}.save-worksheet label{flex-direction:column;flex:1;gap:7px;font-size:12px;font-weight:800;display:flex}.save-worksheet input,.share-worksheet input{background:#fff;border:1px solid #c8d8ee;border-radius:10px;width:100%;min-height:44px;padding:11px 13px;font-size:13px}.saved-worksheets>p{color:#526b89;margin-top:12px;font-size:11px}.preset-list{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.preset-list>div{background:#f5f9ff;border:1px solid #d2e1f4;border-radius:10px;align-items:center;gap:4px;max-width:100%;padding-left:13px;display:flex}.preset-list .text-link{text-align:left;overflow-wrap:anywhere;background:0 0;font-size:12px}.remove-preset{color:#6c5264;background:0 0;flex-shrink:0;width:44px;height:44px;font-size:21px}.share-worksheet{flex-direction:column;gap:7px;margin:15px 0;font-size:12px;font-weight:800;display:flex}.sheet-controls select:disabled{color:#53677f;background:#f3f6fb}.paper-header>div>p{color:#526c8c;max-width:540px;margin-top:7px;font-size:10px;line-height:1.6}.sheet-exercises.has-problems{grid-template-columns:1fr;gap:25px}.sheet-exercise>p.sheet-story{white-space:normal;margin:6px 0;font-size:15px;font-weight:650;line-height:1.6}.sheet-exercise>p.sheet-question{white-space:normal;font-size:15px;font-weight:850;line-height:1.6}.print-column{letter-spacing:4px;flex-direction:column;align-items:flex-end;max-width:140px;margin:8px 0 12px;font-size:25px;font-weight:800;line-height:1.4;display:flex}.sheet-exercise>.print-column{border:0;width:100%;height:auto}.print-column>span{text-align:right;width:100%;display:block;position:relative}.print-column i{font-style:normal;position:absolute;left:0}.print-column hr{background:#496484;border:0;width:100%;height:2px;margin-top:5px}.sheet-exercise>.writing-space{border-bottom:1px dashed #b6c8df}.workspace-roomy .writing-space{height:75px}.worksheet-large .print-operation{font-size:30px}.worksheet-large .print-column{max-width:170px;font-size:31px}.worksheet-large .sheet-story,.worksheet-large .sheet-question{font-size:20px}.worksheet-large .sheet-exercises:not(.has-problems){grid-template-columns:repeat(2,1fr)}.solution-unit{color:#526986;margin-top:5px;font-size:10px;display:block}.sheet-preview .paper:not(:last-child){margin-bottom:25px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (max-width:850px){.worksheet-skills fieldset{grid-template-columns:repeat(2,1fr)}.worksheet-presets{align-items:flex-start}.worksheet-presets h2{font-size:20px}.save-worksheet .button{font-size:12px}}@media (max-width:600px){.worksheet-presets{padding:19px;display:block}.worksheet-presets h2{font-size:20px}.worksheet-presets p{font-size:12px}.worksheet-presets .button{width:100%;margin-top:17px}.worksheet-skills{padding:13px 15px}.worksheet-skills summary{font-size:12px}.worksheet-skills fieldset{grid-template-columns:1fr;gap:7px}.worksheet-skills fieldset>label{font-size:11px}.save-worksheet{display:block}.save-worksheet>.button{width:100%;margin-top:12px}.saved-worksheets{padding:17px}.paper-header>div>p{max-width:250px;font-size:8px}.paper-header{align-items:flex-start;gap:13px}.paper-header>span{white-space:nowrap}.print-column{max-width:120px;font-size:23px}.sheet-exercise>p.sheet-story,.sheet-exercise>p.sheet-question{font-size:13px}.worksheet-large .print-operation{font-size:24px}.worksheet-large .print-column{max-width:140px;font-size:27px}.worksheet-large .sheet-exercise>.sheet-story,.worksheet-large .sheet-exercise>.sheet-question{font-size:17px}}@media print{.sheet-preview .paper:not(:last-child){margin-bottom:0}.paper{break-after:page;overflow-wrap:anywhere}.paper:last-child{break-after:auto}.paper-header>div>p{max-width:145mm;font-size:8pt}.sheet-exercises.has-problems{grid-template-columns:1fr;gap:7mm}.sheet-exercise>p.sheet-story,.sheet-exercise>p.sheet-question{white-space:normal;font-size:11pt;line-height:1.6}.sheet-exercise>.print-column{max-width:38mm;margin:2mm 0 3mm;font-size:19pt;line-height:1.4}.sheet-exercise>.writing-space{height:7mm}.workspace-roomy .sheet-exercise>.writing-space{height:17mm}.worksheet-large .sheet-exercise>.print-operation{font-size:22pt;line-height:1.5}.worksheet-large .sheet-exercise>.print-column{max-width:45mm;font-size:23pt}.worksheet-large .sheet-exercise>.sheet-story,.worksheet-large .sheet-exercise>.sheet-question{font-size:15pt}.worksheet-large .sheet-exercises:not(.has-problems){grid-template-columns:repeat(2,1fr)}.solution-grid{gap:4mm 6mm}.solution-grid p{font-size:11pt}.solution-unit{font-size:8pt;line-height:1.5}.print-operation{white-space:nowrap}.no-print{display:none!important}}.practice-tools{align-items:center;gap:13px;margin-bottom:16px;display:flex}.practice-tools>.skill-picker{flex:1;min-width:0;margin:0}.print-topic-link{white-space:nowrap;flex-shrink:0;padding:10px 14px;font-size:12px}@media (max-width:600px){.practice-tools{gap:8px;margin-bottom:13px}.practice-tools>.skill-picker{flex-wrap:nowrap;align-items:center;gap:7px;min-width:0;padding:9px;display:flex}.practice-tools .skill-picker label{width:69px;min-width:69px;font-size:10px;line-height:1.5}.practice-tools .skill-picker select{flex:1;width:auto;min-width:0;padding:8px;font-size:11px}.practice-tools .skill-picker p{display:none}.print-topic-link{gap:5px;min-height:44px;padding:9px;font-size:10px}.print-topic-link>span{white-space:normal;text-align:center;max-width:43px;line-height:1.3}}.topic-page{padding-top:16px}.topic-page .breadcrumbs{margin-bottom:16px}.topic-page .topic-heading{margin-bottom:18px}.topic-page .practice-tools>.skill-picker{padding:9px 14px}.topic-page .practice-tools{margin-bottom:12px}.topic-page .session-progress{margin:14px 0 16px}.topic-page .current-skill{margin-bottom:8px}.topic-page .operation{margin:8px 0 12px;font-size:48px}.topic-page .practice-widget{padding:22px}@media (max-width:600px){.site-header{height:104px}.nav-wrap{padding-top:4px}.brand{height:52px}.topic-page{padding-top:12px}.topic-page .breadcrumbs{margin-bottom:8px}.topic-page .topic-heading{margin-bottom:15px}.topic-page .practice-tools>.skill-picker{padding:9px}.topic-page .practice-widget{padding:16px}.topic-page .operation{margin:8px 0 12px;font-size:39px}.topic-page .session-progress{margin:13px 0 14px}.topic-page .current-skill{justify-content:center;min-height:44px;padding-right:105px}.topic-page .question-heading{height:0;min-height:0;position:relative}.topic-page .question-heading>span{display:none}.topic-page .question-heading>.subtle-button{width:101px;min-height:44px;padding:5px;font-size:9px;position:absolute;top:-52px;right:3px}}
