:root{--ink:#14233e;--muted:#626e82;--blue:#244aeb;--blue-dark:#1734b7;--paper:#fff;--soft:#f5f7fc;--line:#e3e8f1;--green:#168260;--navy:#13243f}
.member-login{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;font-size:13px;font-weight:700;text-decoration:none;padding:9px 0}.plus-label{font-size:9px;letter-spacing:.06em;color:#244aeb;background:#edf1ff;padding:3px 6px;border-radius:4px}.plus-section{background:#f6f8ff}.plus-promo{display:grid;grid-template-columns:1.2fr 1fr;gap:70px;align-items:center}.plus-promo h2{font-size:clamp(30px,3.5vw,43px);line-height:1.15;letter-spacing:-.04em;margin:0}.plus-promo p{color:#626e82;max-width:480px}.plus-promo small{display:block;margin-top:14px;color:#626e82;font-size:11px}.plus-promo ul{list-style:none;padding:0;margin:0}.plus-promo li{padding:20px 0;border-bottom:1px solid #dfe5f4}.plus-promo li strong,.plus-promo li span{display:block}.plus-promo li span{font-size:13px;color:#626e82;margin-top:4px}@media(min-width:851px) and (max-width:1100px){.header-inner{gap:14px!important}.primary-nav{gap:14px!important}.header-cta{display:none!important}}@media(max-width:580px){.header-inner{gap:12px!important}.member-login{font-size:12px}.member-login .plus-label{display:none}.plus-promo{grid-template-columns:1fr;gap:24px}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Segoe UI",Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}
button{cursor:pointer}
a{color:inherit}
[hidden]{display:none!important}
.shell{width:min(1160px,calc(100% - 64px));margin-inline:auto}
.skip-link{position:absolute;left:16px;top:-60px;z-index:20;padding:12px;background:#fff}
.skip-link:focus{top:10px}
:focus-visible{outline:3px solid #ec9738;outline-offset:4px}
.site-header{position:sticky;top:0;z-index:10;background:#ffffffed;backdrop-filter:blur(16px);border-bottom:1px solid #e8edf5}
.header-inner{display:flex;align-items:center;gap:28px;min-height:82px}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;font-size:20px;font-weight:800;letter-spacing:-.8px;white-space:nowrap}
.brand-light{font-weight:450}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;background:var(--blue);border-radius:10px}
.brand-mark svg{width:29px;height:29px;fill:#fff}
.brand-mark svg path:last-child{fill:none;stroke:#244aeb;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.primary-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
.primary-nav a{font-size:13px;font-weight:600;text-decoration:none;color:#556177;white-space:nowrap}
.primary-nav a:hover,.footer-nav a:hover{color:var(--blue)}
.header-cta{display:inline-flex;justify-content:center;align-items:center;gap:18px;min-height:42px;padding:9px 16px;border-radius:7px;background:var(--blue);color:#fff;text-decoration:none;font-size:12px;font-weight:700;white-space:nowrap}
.header-cta:hover,.button-primary:hover{background:var(--blue-dark)}
.hero{position:relative;overflow:hidden;background:radial-gradient(ellipse at 90% 35%,#e9efff 0,transparent 55%),linear-gradient(#fff,#f8faff)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:44px;min-height:620px;padding:70px 0}
.eyebrow{display:flex;align-items:center;gap:9px;margin:0 0 20px;color:var(--blue);font-size:10px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.hero .eyebrow{display:inline-flex;padding:8px 12px;border:1px solid #dae3ff;border-radius:30px;background:#f0f4ff;font-size:9px;letter-spacing:.08em}
.eyebrow-dot{width:6px;height:6px;border-radius:50%;background:var(--blue)}
.hero h1{margin:0;font-size:clamp(48px,5.1vw,68px);font-weight:740;letter-spacing:-.055em;line-height:1.1;text-wrap:balance}
.hero h1 em{display:block;color:var(--blue);font-style:normal}
.hero-lead{max-width:480px;margin:26px 0 0;color:var(--muted);font-size:16px;line-height:1.8}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:48px;padding:12px 20px;border:1px solid transparent;border-radius:7px;font-size:13px;font-weight:700;text-decoration:none;transition:background .15s,transform .15s}
.button:hover{transform:translateY(-1px)}
.button-primary{background:var(--blue);color:#fff;box-shadow:0 4px 8px #244aeb15}
.button-quiet{color:var(--ink);background:#fff;border-color:#dde4ef;gap:9px}
.button-quiet:hover{background:#f4f6fb}
.play-icon{font-size:9px;border:1px solid #ccd6e8;border-radius:50%;width:20px;height:20px;display:grid;place-items:center;padding-left:1px}
.hero-note{display:flex;gap:22px;margin:22px 0 0;color:#758093;font-size:11px}
.hero-art{position:relative;padding:35px 0 20px}
.hero-art::before{content:"";position:absolute;width:340px;height:340px;right:-45px;top:0;border:1px solid #dce4ff;border-radius:50%;box-shadow:0 0 0 35px #e9efff66,0 0 0 70px #f0f4ff66}
.preview-window{position:relative;border:1px solid #dce3f0;border-radius:16px;background:#fff;box-shadow:0 30px 70px -20px #25487633,0 4px 12px #25487608;overflow:hidden}
.preview-top{display:flex;align-items:center;gap:13px;padding:15px 17px;border-bottom:1px solid #e8ecf4;font-size:8px;font-weight:700;letter-spacing:.07em;color:#768094}
.window-dots{color:#d4daea;font-size:10px;letter-spacing:1px}
.preview-tag{margin-left:auto;padding:2px 6px;border:1px solid #dfe6f3;border-radius:4px;font-size:8px;color:#6c7d99}
.preview-body{display:grid;grid-template-columns:103px 1fr;min-height:356px}
.preview-sidebar{position:relative;padding:22px 9px;background:#f7f9fd;border-right:1px solid #e8ecf4}
.preview-section{display:flex;align-items:center;gap:7px;padding:8px 6px;margin-bottom:6px;border-radius:5px;color:#7b879b;font-size:10px;white-space:nowrap}
.preview-section.active{background:#e8edff;color:var(--blue);font-weight:700}
.sidebar-bottom{position:absolute;bottom:23px;left:17px;font-size:8px;font-weight:800;line-height:1.7;letter-spacing:.11em;color:#a3aec3}
.preview-question{padding:22px 24px}
.preview-breadcrumb{font-size:9px;color:#8b96a9;margin-bottom:20px}
.preview-breadcrumb span{margin:0 6px;color:#c8cfde}
.preview-question-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.preview-pill{padding:4px 7px;background:#eef2ff;color:var(--blue);border-radius:4px;font-size:8px;font-weight:700}
.preview-question-head small{font-size:8px;color:#8995aa}
.preview-question h2{font-size:21px;line-height:1.3;letter-spacing:-.6px;margin:13px 0 8px}
.preview-question>p{font-size:12px;line-height:1.65;margin:0 0 16px;color:#657189}
.preview-answers{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.preview-answers>span{display:flex;align-items:center;gap:8px;border:1px solid #e0e6f0;border-radius:5px;padding:8px 9px;font-size:11px}
.preview-answers i{font-size:8px;font-style:normal;color:#8995aa}
.preview-answers .preview-correct{border-color:#8cc9b3;background:#f1faf6;color:#1d7759}
.preview-correct b{margin-left:auto;font-size:9px}
.preview-explanation{display:flex;gap:9px;align-items:start;margin-top:14px;padding:10px;background:#f1f8f5;border-radius:5px}
.preview-explanation>span{display:grid;place-items:center;width:16px;height:16px;border-radius:50%;background:#d6eee3;color:#1b7c59;font-size:9px}
.preview-explanation p{margin:0;font-size:9px;line-height:1.6;color:#5d7d70}
.preview-explanation strong{display:block;color:#286a53}
.preview-caption{display:flex;align-items:center;justify-content:end;gap:11px;margin-top:24px;color:#7b88a0;font-size:10px}
.caption-line{width:27px;height:1px;background:#a7b7de}
.hero-bottom{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:82px;border-top:1px solid #e0e7f4;font-size:12px;color:#52617c}
.hero-bottom>span{font-size:10px;color:#8b95a7}
.hero-bottom strong{font-weight:600}
.hero-bottom strong::before{content:"✓";margin-right:8px;color:#278769}
.section-pad{padding:94px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:70px;margin-bottom:38px}
.section-head h2,.practice-intro h2,.faq-layout h2{font-size:clamp(33px,3.7vw,46px);line-height:1.15;letter-spacing:-.05em;font-weight:720;margin:0}
.section-head>p{max-width:350px;margin:0 0 3px;color:var(--muted);font-size:14px;line-height:1.8}
.method-section{border-bottom:1px solid #edf0f6}
.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:38px}
.method-grid article{position:relative;padding:26px;border:1px solid #e3e9f4;border-radius:14px;background:linear-gradient(150deg,#fff,#f8faff)}
.method-number{display:grid;place-items:center;width:37px;height:37px;background:#eef2ff;color:var(--blue);border-radius:9px;font-size:12px;font-weight:750}
.method-grid h3{margin:22px 0 10px;font-size:17px;letter-spacing:-.4px}
.method-grid p{margin:0;color:var(--muted);font-size:13px;line-height:1.8}
.method-grid a{display:inline-flex;gap:18px;margin-top:20px;color:var(--blue);font-size:12px;font-weight:700;text-decoration:none}
.method-grid a:hover{text-decoration:underline;text-underline-offset:4px}
.format-section{background:#fafbfe}
.format-grid{display:grid;grid-template-columns:1fr 1fr .9fr;gap:18px}
.format-card,.format-aside{border-radius:12px;padding:27px;min-height:305px}
.format-card{border:1px solid var(--line);background:#fff}
.card-top{display:flex;align-items:center;justify-content:space-between}
.card-icon{display:grid;place-items:center;width:44px;height:44px;background:#edf1ff;border-radius:9px;color:#3454c8;font:600 20px Georgia,serif}
.format-math .card-icon{background:#e9f5ef;color:#318461}
.card-index{font-size:9px;font-weight:750;color:#8892a5;letter-spacing:.13em}
.format-card h3,.format-aside h3{font-size:21px;letter-spacing:-.65px;line-height:1.3;margin:25px 0 12px}
.format-card p,.format-aside p{font-size:13px;color:var(--muted);margin:0;line-height:1.8}
.card-metrics{display:flex;gap:25px;margin-top:24px;padding-top:20px;border-top:1px solid #ebeff6}
.card-metrics span{font-size:10px;color:#7b879d}
.card-metrics strong{color:var(--ink);font-size:26px;font-weight:650;margin-right:5px;letter-spacing:-1px}
.format-aside{background:var(--navy);display:flex;flex-direction:column;color:#fff}
.aside-symbol{font-size:28px;color:#a2b7ff;line-height:1}
.format-aside h3{margin-top:31px}
.format-aside p{color:#b4c0d8}
.format-aside a{display:flex;justify-content:space-between;gap:8px;margin-top:auto;padding-top:24px;font-size:11px;font-weight:600;color:#d1ddff;text-decoration:none}
.source-note{font-size:10px;color:#8791a3;margin:18px 0 0}
.source-note a{text-underline-offset:3px}
.practice-section{background:#f0f4ff}
.practice-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:90px;align-items:center}
.practice-intro h2{font-size:clamp(36px,4vw,50px)}
.practice-intro h2 em{font-style:normal;color:var(--blue)}
.practice-intro>p:not(.eyebrow){max-width:380px;margin:24px 0;color:var(--muted);font-size:14px;line-height:1.85}
.practice-points{display:grid;gap:12px;margin-top:27px}
.practice-points span{display:flex;align-items:center;gap:10px;font-size:12px;font-weight:600}
.practice-points i{display:grid;place-items:center;width:19px;height:19px;background:#dce6ff;color:var(--blue);border-radius:50%;font-size:10px;font-style:normal}
.quiz-card{padding:28px;background:#fff;border:1px solid #dee5f4;border-radius:18px;box-shadow:0 22px 50px -20px #29467538}
.quiz-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:20px;border-bottom:1px solid #e9edf4}
.quiz-toolbar label{font-size:13px;font-weight:700}
.quiz-toolbar select{max-width:205px;padding:8px 30px 8px 10px;border:1px solid #dce3ef;border-radius:6px;color:#46566e;background:#fafbfe;font-size:11px}
.quiz-meta{display:flex;justify-content:space-between;gap:12px;margin:20px 0 0;font-size:9px;letter-spacing:.07em;font-weight:700;color:#8792a7;text-transform:uppercase}
.quiz-progress,.plan-progress{height:4px;border-radius:5px;background:#e9eef7;margin:12px 0 23px;overflow:hidden}
.quiz-progress span,.plan-progress span{display:block;height:100%;background:var(--blue);transition:width .2s}
.quiz-skill{margin:0 0 12px;color:var(--blue);font-size:9px;font-weight:750;text-transform:uppercase;letter-spacing:.12em}
.quiz-context{font:15px/1.75 Georgia,serif;color:#43516b;padding:14px 16px;background:#f6f8fc;border-left:2px solid #c6d4fa;margin:0 0 16px}
#quiz-prompt{font-size:20px;font-weight:650;letter-spacing:-.5px;line-height:1.5;margin:0 0 20px}
.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.quiz-option{display:flex;align-items:center;gap:11px;min-height:52px;border:1px solid #dfe5ef;border-radius:7px;background:#fff;color:var(--ink);padding:10px 12px;text-align:left;font-size:12px;line-height:1.5}
.quiz-option:hover:not(:disabled){border-color:var(--blue);background:#f8faff}
.quiz-option:disabled{cursor:default}
.option-letter{flex:none;display:grid;place-items:center;width:23px;height:23px;border-radius:5px;background:#f1f4f9;font-size:10px;font-weight:700;color:#7a879c}
.quiz-option.correct{border-color:#75b99c;background:#f0faf5}
.quiz-option.incorrect{border-color:#d39a8c;background:#fff6f2}
.quiz-feedback{padding:17px 19px;margin-top:18px;border:1px solid #d0e8db;border-radius:10px;background:#edf8f1;color:#256c4d;font-size:13px;line-height:1.75}
.quiz-feedback.is-incorrect{background:#fff4ee;color:#87513e}
.quiz-next{margin-top:19px;min-height:42px;padding:10px 16px;font-size:12px}
.quiz-next:disabled{opacity:.4;cursor:not-allowed;transform:none}
.quiz-footnote{margin:20px 0 0;color:#909bad;font-size:10px}
.quiz-summary{text-align:center;padding:26px 0}
.summary-icon{font-size:36px;color:var(--blue)}
.quiz-summary h3{font-size:29px;letter-spacing:-1px;margin:8px 0}
.quiz-summary p{font-size:13px;color:var(--muted);margin:0 auto 25px;max-width:330px}
.plan-layout{display:grid;grid-template-columns:1.5fr .7fr;gap:32px;align-items:start}
.plan-list{display:grid;gap:8px}
.plan-task{display:grid;grid-template-columns:24px 1fr auto;gap:17px;align-items:center;padding:18px 20px;border:1px solid #e4e9f1;border-radius:9px;cursor:pointer}
.plan-task:hover{background:#fafbff;border-color:#cbd6f3}
.plan-task input{position:absolute;opacity:0;width:1px;height:1px}
.task-check{width:21px;height:21px;border:1.5px solid #cbd4e2;border-radius:6px;display:grid;place-items:center}
.plan-task input:focus-visible+.task-check{outline:3px solid #ec9738;outline-offset:4px}
.plan-task input:checked+.task-check{background:var(--blue);border-color:var(--blue);color:#fff}
.plan-task input:checked+.task-check::after{content:"✓";font-size:12px}
.plan-task input:checked~span strong{color:#7b879a;text-decoration:line-through}
.plan-task strong,.plan-task small{display:block}
.plan-task strong{font-size:13px;font-weight:650}
.plan-task small{margin-top:4px;font-size:11px;color:#7d889b;line-height:1.55}
.task-day{font-size:9px;font-weight:700;letter-spacing:.1em;color:#9aa4b6;white-space:nowrap}
.plan-card{padding:29px;background:#f6f8fd;border:1px solid #e5eaf4;border-radius:12px}
.plan-card-icon{display:grid;place-items:center;width:43px;height:43px;background:#e8edff;color:var(--blue);border-radius:10px;font-size:27px}
.plan-card-label{margin:29px 0 10px;font-size:9px;font-weight:750;letter-spacing:.13em;color:#8290a7}
.plan-card>strong{font-size:42px;line-height:1.2;letter-spacing:-2px;font-weight:650}
.plan-card .plan-progress{margin:18px 0 22px;height:6px}
.plan-card>p:not(.plan-card-label){font-size:13px;line-height:1.8;color:var(--muted)}
.plan-card button{padding:0;margin-top:10px;background:none;border:0;color:var(--blue);font-size:11px;font-weight:700}
.plan-card small{display:block;margin-top:28px;padding-top:20px;border-top:1px solid #e3e9f4;color:#8e99ab;font-size:10px}
.resources-section{background:var(--navy);color:#fff}
.resources-section .eyebrow{color:#96aefa}
.resources-head>p{color:#a8b8d1}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.resource-card{display:flex;flex-direction:column;padding:27px;min-height:231px;background:#1c2e4a;border:1px solid #33435e;border-radius:10px;text-decoration:none;transition:background .15s,transform .15s}
.resource-card:hover{background:#253b60;transform:translateY(-3px)}
.resource-number{font-size:10px;letter-spacing:.12em;color:#91a9da}
.resource-card>span:nth-child(2){margin-top:24px}
.resource-card strong{display:block;font-size:18px;font-weight:600;line-height:1.4;letter-spacing:-.3px}
.resource-card small{display:block;margin-top:10px;font-size:12px;line-height:1.7;color:#9eafcb}
.resource-arrow{font-size:22px;color:#91aafd;align-self:end;margin-top:auto;padding-top:14px}
.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:100px}
.faq-layout>div>p:not(.eyebrow){color:var(--muted);font-size:14px;max-width:260px}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list details:first-child{border-top:1px solid var(--line)}
.faq-list summary{position:relative;padding:21px 32px 21px 0;font-size:14px;font-weight:650;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";position:absolute;right:3px;top:17px;color:#7484a5;font-size:22px;font-weight:400}
.faq-list details[open] summary::after{content:"−"}
.faq-list details p{margin:0;padding:0 25px 24px 0;color:var(--muted);font-size:13px;line-height:1.8}
.closing-section{background:#f0f4ff;border-top:1px solid #e5ebf8}
.closing-inner{display:flex;justify-content:space-between;align-items:center;gap:32px;padding-top:56px;padding-bottom:56px}
.closing-inner .eyebrow{margin-bottom:10px}
.closing-inner h2{margin:0;font-size:36px;line-height:1.25;letter-spacing:-1.4px}
.closing-inner p:not(.eyebrow){font-size:13px;color:var(--muted);margin:12px 0 0}
.closing-inner .button{white-space:nowrap}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px;padding:62px 0 45px}
.footer-about p{font-size:13px;line-height:1.8;color:#8792a6;margin:20px 0 0}
.footer-nav{display:flex;flex-direction:column;gap:10px}
.footer-nav h3{font-size:12px;margin:0 0 6px;font-weight:750}
.footer-nav a{font-size:12px;color:#7b879c;text-decoration:none}
.footer-bottom{border-top:1px solid #e8edf5;display:flex;justify-content:space-between;gap:50px;padding-top:23px;padding-bottom:28px}
.footer-bottom p{font-size:10px;line-height:1.7;color:#98a1b2;max-width:670px;margin:0}
.footer-bottom a{font-size:10px;color:#748098;text-decoration:none;white-space:nowrap}
@media(min-width:1500px){.hero-grid{min-height:700px}}
@media(max-width:1050px){.primary-nav{gap:17px}.header-inner{gap:18px}.brand{font-size:18px}.header-cta{font-size:11px;padding:9px 12px}.hero-grid{gap:28px}.preview-body{grid-template-columns:80px 1fr}.preview-question{padding:19px}.preview-sidebar{padding:20px 4px}.preview-section{gap:5px;font-size:9px}.sidebar-bottom{left:10px}.practice-grid{gap:45px}.faq-layout{gap:50px}.format-card,.format-aside{padding:22px}.card-metrics{gap:15px}}
@media(max-width:850px){.shell{width:calc(100% - 48px)}.header-inner{flex-wrap:wrap;min-height:80px;padding:16px 0;gap:12px}.header-cta{margin-left:auto}.primary-nav{order:3;justify-content:space-between;width:100%;margin:4px 0 0;gap:12px}.primary-nav a{font-size:12px}.hero-grid{grid-template-columns:1fr;gap:30px;padding:58px 0 35px}.hero-copy{max-width:600px}.hero h1{font-size:64px;max-width:600px}.hero h1 br:first-of-type{display:none}.hero-lead{max-width:570px}.hero-art{max-width:560px;width:100%;margin:auto;padding-top:10px}.preview-body{grid-template-columns:110px 1fr}.preview-question{padding:25px}.preview-section{font-size:10px;padding:9px}.preview-sidebar{padding:24px 8px}.sidebar-bottom{left:17px}.preview-question h2{font-size:24px}.preview-question>p{font-size:13px}.preview-answers>span{font-size:13px}.preview-explanation p{font-size:10px}.hero-bottom{flex-wrap:wrap;gap:12px 24px;padding:23px 0;justify-content:start}.hero-bottom>span{width:100%}.section-pad{padding:68px 0}.section-head{gap:30px}.section-head>p{max-width:260px;font-size:13px}.method-grid{gap:23px}.method-grid h3{font-size:15px}.method-grid p{font-size:12px}.format-grid{grid-template-columns:1fr 1fr}.format-aside{grid-column:1/-1;min-height:200px}.format-aside h3{margin-top:20px}.format-aside a{margin-top:5px}.practice-grid{grid-template-columns:1fr;gap:32px}.practice-intro{max-width:560px}.practice-intro h2{font-size:43px}.practice-intro h2 br:first-of-type{display:none}.practice-intro>p:not(.eyebrow){max-width:540px}.practice-points{display:flex;flex-wrap:wrap;gap:14px 20px}.quiz-card{max-width:620px;width:100%;margin:auto}.plan-layout{grid-template-columns:1.3fr .8fr;gap:16px}.plan-card{padding:22px}.plan-task{grid-template-columns:21px 1fr;padding:16px;gap:12px}.task-day{display:none}.resource-grid{gap:12px}.resource-card{padding:21px}.resource-card strong{font-size:16px}.faq-layout{gap:35px}.closing-inner h2{font-size:29px}.footer-inner{gap:35px}}
@media(max-width:580px){.shell{width:calc(100% - 36px)}html{scroll-padding-top:120px}.brand{font-size:17px}.brand-mark{width:33px;height:33px}.header-cta{font-size:10px;gap:8px;min-height:36px;padding:7px 11px}.primary-nav a{font-size:11px}.hero-grid{padding-top:40px}.hero .eyebrow{font-size:8px}.hero h1{font-size:clamp(42px,11vw,62px)}.hero h1 br:first-of-type{display:block}.hero-lead{font-size:14px;margin-top:20px}.hero-actions{gap:9px}.button{font-size:12px;gap:15px;padding:11px 15px;min-height:44px}.hero-note{font-size:10px;gap:17px}.hero-art{padding-top:4px}.hero-art::before{width:240px;height:240px;right:-40px;top:50px}.preview-window{transform:none}.preview-body{grid-template-columns:62px 1fr;min-height:340px}.preview-top{padding:13px;font-size:7px;gap:9px}.preview-tag{font-size:7px}.preview-sidebar{padding:18px 5px}.preview-section{justify-content:center;font-size:17px;padding:8px 2px}.preview-section span,.sidebar-bottom{display:none}.preview-question{padding:18px 16px}.preview-question h2{font-size:21px}.preview-question>p{font-size:12px}.preview-answers>span{padding:7px;font-size:11px}.preview-explanation p{font-size:9px}.preview-caption{font-size:9px}.hero-bottom{gap:10px 17px;font-size:10px}.hero-bottom strong::before{margin-right:5px}.section-pad{padding:55px 0}.section-head{display:block;margin-bottom:26px}.section-head h2,.faq-layout h2{font-size:32px}.section-head>p{max-width:none;margin-top:18px}.eyebrow{font-size:9px;margin-bottom:15px}.method-grid{grid-template-columns:1fr;gap:25px}.method-grid article{padding-top:20px}.method-grid h3{font-size:18px;margin-top:15px}.method-grid p{font-size:13px}.method-grid a{margin-top:12px}.format-grid{grid-template-columns:1fr}.format-aside{grid-column:auto}.format-card{min-height:265px;padding:25px}.format-card h3{margin-top:23px}.practice-intro h2{font-size:35px}.practice-intro h2 br:first-of-type{display:block}.practice-points{display:grid}.quiz-card{padding:21px 18px}.quiz-toolbar{gap:10px}.quiz-toolbar select{max-width:175px}.quiz-options{grid-template-columns:1fr}.quiz-option{min-height:46px}#quiz-prompt{font-size:19px}.plan-layout{grid-template-columns:1fr}.plan-card{padding:25px}.plan-card-label{margin-top:20px}.plan-card small{margin-top:20px}.resource-grid{grid-template-columns:1fr}.resource-card{min-height:186px;padding:24px}.resource-card>span:nth-child(2){margin-top:18px}.resource-card strong{font-size:20px}.faq-layout{grid-template-columns:1fr;gap:25px}.faq-layout h2 br{display:none}.faq-layout>div>p:not(.eyebrow){max-width:none}.closing-inner{align-items:start;flex-direction:column;padding:40px 0;gap:23px}.closing-inner h2{font-size:30px}.footer-inner{grid-template-columns:1fr 1fr;gap:33px;padding:45px 0}.footer-about{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom a{display:inline-block;margin-top:17px}}
.menu-toggle{display:none}
.brand{letter-spacing:-.65px}
.brand-mark{box-shadow:0 3px 8px #244aeb20}
.button,.header-cta{border-radius:9px}
.button-primary{box-shadow:0 3px 4px #244aeb15,inset 0 1px 0 #ffffff22}
.hero-lead{font-size:16px;line-height:1.85}
.hero-art{padding-top:15px}
.hero-art::before{opacity:.65}
.preview-ribbon{position:relative;display:flex;align-items:center;justify-content:center;gap:15px;margin:25px auto 0;color:#73819b;font-size:10px}
.preview-ribbon span{display:flex;align-items:center;gap:6px}
.preview-ribbon b{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#e8eeff;color:#526db9;font-size:8px}
.preview-ribbon i{font-style:normal;color:#a2b2d2}
.section-head h2,.practice-intro h2,.faq-layout h2{text-wrap:balance}
.method-grid{gap:20px}
.method-grid a{font-size:12px;line-height:1.6}
.format-card{box-shadow:0 4px 16px #203a7704}
.format-card p,.format-aside p{font-size:14px}
.source-note,.quiz-footnote{color:#728099}
.quiz-toolbar{padding-bottom:19px}
.quiz-toolbar>div{display:flex;align-items:center;gap:10px}
.quiz-toolbar strong{font-size:15px;letter-spacing:-.3px}
.studio-icon{width:29px;height:29px;display:grid;place-items:center;border-radius:8px;background:#eef2ff;color:var(--blue);font-size:21px}
.untimed-badge{padding:3px 9px;border:1px solid #e1e7f2;border-radius:20px;background:#f8faff;color:#7d8ba3;font-size:10px}
.subject-tabs{display:flex;padding:4px;margin-top:20px;border:1px solid #e6ebf4;border-radius:9px;background:#f4f6fb;gap:3px}
.subject-tabs button{flex:1;min-height:38px;padding:7px 9px;border:0;border-radius:6px;background:transparent;color:#73819a;font-size:11px;font-weight:650;white-space:nowrap}
.subject-tabs button[aria-pressed=true]{background:#fff;color:var(--blue);box-shadow:0 1px 5px #22376e16}
.subject-tabs button:hover{color:var(--blue)}
.quiz-option{position:relative;font-size:13px;min-height:58px;border-radius:9px;transition:background .12s,border-color .12s}
.quiz-option.selected{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue);background:#f5f7ff}
.quiz-option.selected .option-letter{background:var(--blue);color:#fff}
.quiz-option.correct{box-shadow:none;border-color:#75b99c;background:#f0faf5}
.quiz-option.incorrect{box-shadow:none;border-color:#d39a8c;background:#fff6f2}
.quiz-feedback strong{display:block;margin-bottom:5px;font-size:13px}
.quiz-feedback.is-incorrect{border-color:#efd6c9}
.quiz-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:22px;padding-top:19px;border-top:1px solid #edf0f7}
.quiz-actions>span{font-size:10px;color:#8590a5}
.quiz-actions .button{min-height:42px;padding:10px 15px;font-size:12px;white-space:nowrap}
.quiz-actions button:disabled{opacity:.4;cursor:not-allowed;transform:none}
.quiz-summary{padding-bottom:0}
.quiz-summary h3{font-size:25px;line-height:1.3;max-width:320px;margin:18px auto 12px}
.result-ring{--result:0%;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;width:108px;height:108px;margin:0 auto;background:conic-gradient(var(--blue) var(--result),#e9eef9 0);border-radius:50%;isolation:isolate}
.result-ring::before{content:"";position:absolute;inset:7px;border-radius:50%;background:#fff;z-index:-1}
.result-ring strong{font-size:25px;font-weight:700;letter-spacing:-1px;line-height:1.2}
.result-ring>span{font-size:10px;color:#8190a9}
.quiz-review{margin-top:28px;border-top:1px solid #e6ebf4;text-align:left}
.quiz-review details{border-bottom:1px solid #e6ebf4}
.quiz-review summary{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:17px 0;cursor:pointer;list-style:none;font-size:12px;font-weight:650}
.quiz-review summary::-webkit-details-marker{display:none}
.quiz-review summary::after{content:"+";color:#8392ab;font-weight:400}
.quiz-review details[open] summary::after{content:"−"}
.review-badge{margin-left:auto;padding:2px 7px;border-radius:5px;background:#fff1e5;color:#8b5f35;font-size:9px;font-weight:600}
.review-badge.correct{background:#eaf6ef;color:#317951}
.quiz-review p{max-width:none;margin:0 0 14px;padding:0;color:#687892;font-size:12px;line-height:1.8}
.quiz-review .review-prompt{font-weight:650;color:#283c60}
.quiz-review .review-answer{color:#277653}
.plan-task{transition:background .12s,border-color .12s}
.plan-task:has(input:checked){background:#f6f9ff;border-color:#cfdbfb}
.plan-card{background:linear-gradient(155deg,#f4f7ff,#eef3ff);border-color:#dce5fc}
.plan-card-icon{background:#fff;box-shadow:0 2px 6px #2946750b;color:var(--blue);font-size:19px}
.plan-card small{color:#728199}
.footer-nav a{padding:2px 0}
@media(max-width:1050px){.method-grid article{padding:22px}.subject-tabs button{font-size:10px;padding-inline:5px}}
@media(max-width:850px){
  html{scroll-padding-top:90px}
  .header-inner{position:relative;min-height:76px;flex-wrap:nowrap;padding:14px 0;gap:14px}
  .menu-toggle{display:flex;align-items:center;justify-content:center;gap:8px;margin-left:auto;border:1px solid #dfe6f1;border-radius:8px;min-height:40px;padding:8px 11px;background:#fff;color:#4d5e7a;font-size:11px;font-weight:650}
  .menu-lines{width:12px;height:9px;border-top:1.5px solid currentColor;border-bottom:1.5px solid currentColor}
  .header-cta{margin-left:0;min-height:40px}
  .primary-nav{display:none;position:absolute;top:calc(100% - 4px);left:0;right:0;width:auto;flex-direction:column;align-items:stretch;gap:3px;margin:0;padding:10px;background:#fff;border:1px solid #e2e8f3;border-radius:11px;box-shadow:0 15px 30px #243a651a}
  .primary-nav.is-open{display:flex}
  .primary-nav a{padding:12px 14px;border-radius:6px;font-size:13px}
  .primary-nav a:hover{background:#f2f5ff}
  .hero-grid{padding:48px 0 30px;gap:34px}
  .hero h1{font-size:58px;max-width:650px}
  .hero-copy{max-width:650px}
  .hero-art{max-width:620px}
  .preview-body{min-height:375px;grid-template-columns:115px 1fr}
  .preview-question{padding:26px 30px}
  .preview-top{font-size:9px}
  .preview-breadcrumb{font-size:10px}
  .preview-question h2{font-size:27px}
  .preview-explanation p{font-size:11px}
  .preview-answers>span{padding:10px 12px}
  .method-grid{gap:14px}
  .method-grid article{padding:20px}
  .quiz-card{max-width:650px}
  .quiz-toolbar strong{font-size:16px}
  .subject-tabs button{font-size:12px}
}
@media(max-width:580px){
  .header-inner{min-height:70px}
  .header-cta{display:none}
  .hero h1{font-size:clamp(39px,10vw,54px)}
  .hero .eyebrow{font-size:8px;padding:7px 9px;letter-spacing:.05em}
  .hero-grid{padding-top:37px;gap:29px}
  .hero-lead{font-size:15px;line-height:1.75}
  .hero-actions{display:grid;grid-template-columns:1fr;gap:10px}
  .hero-actions .button{min-height:48px;justify-content:space-between}
  .hero-note{font-size:10px;gap:16px}
  .preview-body{grid-template-columns:48px 1fr;min-height:340px}
  .preview-sidebar{padding:17px 3px}
  .preview-question{padding:20px 14px}
  .preview-question h2{font-size:22px}
  .preview-top{font-size:7px;gap:7px}
  .preview-breadcrumb{font-size:9px}
  .preview-explanation p{font-size:9px}
  .preview-answers>span{padding:8px}
  .preview-ribbon{gap:10px;font-size:9px}
  .preview-ribbon b{width:19px;height:19px;font-size:7px}
  .hero-bottom{display:grid;grid-template-columns:1fr;gap:13px;padding:25px 0;font-size:12px}
  .method-grid article{padding:24px}
  .subject-tabs button{font-size:10px;padding:7px 4px;min-height:42px}
  .quiz-card{padding:23px 18px}
  .quiz-actions{flex-direction:column;align-items:stretch;gap:12px}
  .quiz-actions .button{width:100%;min-height:46px}
  .quiz-actions>span{text-align:center}
  .quiz-option{min-height:52px}
  .quiz-review summary{font-size:11px;gap:7px}
  .review-badge{font-size:8px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}