/* Statistics course: scoped to this page. Reference: the live /#/math-course,
 * not the separate corporate /math-course/ template. */
:root{--sc-paper:#fafaf8;--sc-white:#fff;--sc-soft:#f2f2f0;--sc-ink:#1a1a1e;--sc-body:#5a5a5e;--sc-muted:#67676b;--sc-line:#e6e6e4;--sc-blue:#2a8fc1;--sc-action:#237ba5;--sc-action-hover:#1b6387;--sc-serif:"Noto Serif JP","Yu Mincho","Hiragino Mincho ProN",serif;--sc-sans:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Yu Gothic",sans-serif;--sc-header:65px;--sc-cta-height:58px}
*{box-sizing:border-box}
html{scroll-padding-top:89px}
body.statistics-course-v2{margin:0;background:var(--sc-paper);color:var(--sc-ink);font-family:var(--sc-sans);font-size:16px;font-weight:400;line-height:1.9;-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
.statistics-course-v2 a{color:inherit}
.statistics-course-v2 button,.statistics-course-v2 summary{font:inherit}
.statistics-course-v2 img{max-width:100%;height:auto}
.statistics-course-v2 h1,.statistics-course-v2 h2,.statistics-course-v2 h3{font-family:var(--sc-serif);font-weight:700;color:inherit;letter-spacing:.02em}
.statistics-course-v2 h1{font-size:32px;line-height:1.4;margin:16px 0 24px}
.statistics-course-v2 h2{font-size:28px;line-height:1.5;margin:0 0 24px}
.statistics-course-v2 h3{font-size:20px;line-height:1.6;margin:0 0 12px}
.statistics-course-v2 p{margin:0 0 20px}
.statistics-course-v2 a:focus-visible,.statistics-course-v2 summary:focus-visible{outline:3px solid var(--sc-action);outline-offset:5px}
.sc-container{width:100%;max-width:896px;margin-inline:auto;padding-inline:24px;min-width:0}
.sc-container--narrow{max-width:768px}
.sc-kicker{font-family:var(--sc-sans);font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--sc-action);margin-bottom:16px!important}
.sc-note{font-size:13px;line-height:1.85;color:var(--sc-muted)}
.sc-copy{color:var(--sc-body)}
.sc-copy strong{color:var(--sc-ink);font-weight:600}
.sc-section{padding-block:80px}
.sc-section--white{background:var(--sc-white)}
.sc-section--soft{background:var(--sc-soft)}
.sc-section--dark{background:var(--sc-ink);color:var(--sc-paper)}
.sc-section--dark .sc-kicker{color:#92c7e0}
.sc-section--dark .sc-copy,.sc-section--dark .sc-note{color:#dedee0}
.sc-section--dark .sc-copy strong{color:var(--sc-white)}
.sc-section-intro{max-width:720px;margin-bottom:36px}
.sc-section-intro>p:last-child{margin-bottom:0}
.sc-skip{position:fixed;top:8px;left:12px;z-index:1000;padding:10px 18px;background:white;transform:translateY(-150%)}
.sc-skip:focus{transform:none}
.sc-header{height:var(--sc-header);position:fixed;z-index:100;inset:0 0 auto;background:rgba(250,250,248,.97);border-bottom:1px solid #f0f0ee;backdrop-filter:blur(8px)}
.sc-header-inner{max-width:1152px;height:64px;margin:auto;padding-inline:24px;display:flex;align-items:center;gap:14px}
.sc-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--sc-serif);font-size:18px;font-weight:700;letter-spacing:.025em;min-height:44px}
.sc-brand img{display:block;width:32px;height:32px;object-fit:contain}
.sc-desktop-nav{display:none;margin-left:auto;align-items:center;gap:28px;font-size:13px;font-weight:500}
.sc-desktop-nav a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none}
.sc-desktop-nav a:hover{text-decoration:underline;text-underline-offset:5px}
.sc-menu{position:static}
.sc-menu>summary{display:flex;align-items:center;justify-content:center;width:44px;height:44px;margin-left:-10px;list-style:none;cursor:pointer}
.sc-menu>summary::-webkit-details-marker{display:none}
.sc-menu>summary svg{width:22px;height:22px;stroke:var(--sc-ink)}
.sc-menu nav{position:absolute;top:64px;left:0;right:0;padding:16px 24px 24px;background:var(--sc-paper);border-bottom:1px solid var(--sc-line);box-shadow:0 12px 20px rgba(26,26,30,.05)}
.sc-menu nav a{display:block;padding:12px 0;text-decoration:none;border-bottom:1px solid var(--sc-line)}
.sc-header-course{margin-left:auto;font-size:12px;color:var(--sc-body);white-space:nowrap}
.sc-main{padding-top:var(--sc-header)}
.sc-hero{padding-block:72px 64px;text-align:center;background:var(--sc-paper)}
.sc-hero .sc-kicker{letter-spacing:.08em}
.sc-hero-lead{font-size:20px;font-weight:500;line-height:1.8;margin-bottom:24px!important}
.sc-hero-copy{max-width:680px;margin-inline:auto;color:var(--sc-body);text-align:left}
.sc-course-facts{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;padding:0;margin:26px 0 0;list-style:none;font-size:13px;color:var(--sc-body)}
.sc-course-facts li{border-bottom:1px solid var(--sc-line);padding-bottom:6px}
.sc-actions{display:flex;flex-direction:column;gap:14px;align-items:stretch;margin-top:32px;margin-bottom:28px}
.sc-button{display:inline-flex;align-items:center;justify-content:center;min-height:var(--sc-cta-height);padding:14px 28px;border:1px solid var(--sc-action);border-radius:0;background:var(--sc-action);color:#fff!important;text-align:center;text-decoration:none;font-family:var(--sc-sans);font-size:15px;font-weight:600;letter-spacing:.03em;line-height:1.8;cursor:pointer}
.sc-button:hover{background:var(--sc-action-hover);border-color:var(--sc-action-hover)}
.sc-button--secondary{background:transparent;border-color:#b7b7ba;color:var(--sc-ink)!important}
.sc-button--secondary:hover{background:#f0f2f3;border-color:var(--sc-action)}
.sc-text-link{display:inline-block;color:var(--sc-action)!important;font-weight:600;text-decoration:underline;text-underline-offset:5px;padding-block:8px}
.sc-section--dark .sc-text-link{color:#a6d1e5!important}
.sc-demo{border:1px solid var(--sc-line);padding:28px 22px;background:var(--sc-paper)}
.sc-demo-head{font-size:13px;color:var(--sc-action);letter-spacing:.08em;font-weight:600}
.sc-demo h3{font-size:22px;line-height:1.65}
.sc-means{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:24px 0}
.sc-mean{border:1px solid var(--sc-line);background:white;padding:20px 12px;text-align:center}
.sc-mean>span{display:block;font-size:14px;color:var(--sc-body)}
.sc-mean strong{display:block;font-family:var(--sc-serif);font-size:40px;line-height:1.3;margin-top:8px}
.sc-mean small{font-size:15px;margin-left:4px;font-weight:400}
.sc-demo-details>summary{min-height:52px;padding:15px 18px;background:var(--sc-action);color:white;cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:15px;font-weight:600;line-height:1.65}
.sc-demo-details>summary::-webkit-details-marker{display:none}
.sc-demo-details>summary::after{content:'＋';font-size:22px;flex:none}
.sc-demo-details[open]>summary::after{content:'−'}
.sc-demo-reveal{padding-top:24px}
.sc-sample-row{margin:0 0 20px}
.sc-sample-row p{font-size:14px;font-weight:600;margin-bottom:10px}
.sc-values{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;padding:0;list-style:none;margin:0}
.sc-values li{display:flex;justify-content:center;align-items:center;min-height:46px;background:#fff;border:1px solid #b4cbd6;font-size:18px;font-variant-numeric:tabular-nums;color:var(--sc-ink)}
.sc-demo-answer{font-weight:600;border-left:3px solid var(--sc-blue);padding-left:16px;margin-top:24px!important}
.sc-demo .sc-note{margin-top:20px;margin-bottom:0}
.sc-situations{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--sc-line)}
.sc-situation{padding:28px 0;border-bottom:1px solid var(--sc-line)}
.sc-situation h3{font-size:20px;margin-bottom:12px}
.sc-situation p{margin-bottom:0;color:var(--sc-body)}
.sc-situation .sc-question{margin-top:14px;color:var(--sc-ink);font-weight:600}
.sc-principles{display:grid;grid-template-columns:1fr;gap:18px;margin-top:32px}
.sc-principle{border:1px solid #55555b;padding:26px 24px}
.sc-principle>span{display:block;color:#92c7e0;font-size:13px;margin-bottom:12px}
.sc-principle h3{font-size:20px}
.sc-principle p{color:#dedee0;margin:0;font-size:15px}
.sc-learning-summary{padding-left:20px;margin:0;color:var(--sc-body)}
.sc-learning-summary li{margin-block:8px}
.sc-curriculum-group{margin-top:40px;border-top:2px solid var(--sc-ink)}
.sc-curriculum-heading{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:baseline;padding-block:24px 16px}
.sc-curriculum-heading h3{margin:0;font-size:22px}
.sc-curriculum-heading span{font-size:14px;color:var(--sc-body)}
.sc-lessons{list-style:none;padding:0;margin:0}
.sc-lesson{display:grid;grid-template-columns:32px minmax(0,1fr);gap:14px;padding-block:20px;border-bottom:1px solid var(--sc-line)}
.sc-lesson-no{font-size:13px;font-variant-numeric:tabular-nums;color:var(--sc-action);padding-top:3px}
.sc-lesson h4{margin:0 0 7px;font-family:var(--sc-sans);font-size:16px;line-height:1.7;font-weight:600}
.sc-lesson p{margin:0;font-size:14px;line-height:1.9;color:var(--sc-body)}
.sc-boundary{margin-top:36px;padding:26px 24px;background:white;border:1px solid var(--sc-line)}
.sc-boundary h3{font-size:19px}
.sc-boundary p:last-child{margin:0;font-size:14px;color:var(--sc-body)}
.sc-instructor{display:flex;flex-direction:column;gap:22px;padding:30px 26px;border:1px solid var(--sc-line)}
.sc-initial{width:56px;height:56px;background:var(--sc-ink);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--sc-serif);font-size:24px;flex:none}
.sc-instructor h3{font-size:22px;margin-bottom:4px}
.sc-instructor-role{font-size:13px;color:var(--sc-action)}
.sc-instructor .sc-copy{font-size:15px}
.sc-instructor .sc-copy:last-child{margin-bottom:0}
.sc-price{text-align:center}
.sc-price-label{display:inline-block;font-size:14px;font-weight:600;color:var(--sc-action);margin-bottom:12px!important}
.sc-price-number{font-family:var(--sc-serif);font-size:44px;line-height:1.35;letter-spacing:0;margin:0!important;font-variant-numeric:tabular-nums}
.sc-price-number small{font-family:var(--sc-sans);font-size:14px;font-weight:400;white-space:nowrap}
.sc-price-regular{font-size:14px;color:var(--sc-body);margin:12px 0 24px!important}
.sc-price-includes{max-width:600px;margin:0 auto!important;color:var(--sc-body);font-size:15px}
.sc-purchase-block{margin-top:36px;margin-bottom:28px;display:flex;justify-content:center}
.sc-purchase-block .sc-button{width:100%;max-width:390px}
.sc-faq{border-top:1px solid var(--sc-line)}
.sc-faq details{border-bottom:1px solid var(--sc-line);padding:0}
.sc-faq summary{position:relative;min-height:60px;padding:22px 36px 22px 0;list-style:none;cursor:pointer;font-size:16px;line-height:1.8;font-weight:600}
.sc-faq summary::-webkit-details-marker{display:none}
.sc-faq summary::after{content:'＋';position:absolute;right:2px;top:22px;color:var(--sc-action);font-size:18px}
.sc-faq details[open] summary::after{content:'−'}
.sc-faq-answer{padding:0 0 24px;color:var(--sc-body);font-size:15px}
.sc-faq-answer p:last-child{margin-bottom:0}
.sc-related{border:1px solid var(--sc-line);padding:28px 24px;margin-top:30px;background:white}
.sc-related p:last-child{margin-bottom:0}
.sc-final{text-align:center}
.sc-final .sc-price-regular{color:#dedee0}
.sc-final .sc-button{background:var(--sc-action);border-color:var(--sc-action)}
.sc-final .sc-button:hover{background:var(--sc-action-hover)}
.sc-footer{background:var(--sc-paper);padding-block:46px 30px;border-top:1px solid var(--sc-line);font-size:13px;color:var(--sc-body)}
.sc-footer-grid{display:flex;flex-direction:column;gap:26px}
.sc-footer .sc-brand{color:var(--sc-ink);font-size:20px}
.sc-footer p{margin:12px 0 0}
.sc-footer-nav{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:start}
.sc-footer-nav a{min-height:44px;display:inline-flex;align-items:center;text-underline-offset:4px}
.sc-footer-note{border-top:1px solid var(--sc-line);padding-top:24px;margin-top:26px}
.sc-footer small{display:block;margin-top:20px;font-size:12px}
@media(min-width:640px){.statistics-course-v2 h1{font-size:44px;line-height:1.3}.statistics-course-v2 h2{font-size:32px}.sc-actions{flex-direction:row;justify-content:center;align-items:center}.sc-actions .sc-button{min-width:220px}.sc-hero-copy{text-align:center}.sc-means{gap:20px}.sc-demo{padding:36px}.sc-principles{grid-template-columns:repeat(2,minmax(0,1fr))}.sc-instructor{flex-direction:row;gap:28px;padding:36px}.sc-price-number{font-size:56px}.sc-footer-grid{flex-direction:row;justify-content:space-between}.sc-footer-nav{max-width:340px}}
@media(min-width:900px){.sc-desktop-nav{display:flex}.sc-menu,.sc-header-course{display:none}.sc-header-inner{padding-inline:32px}.sc-container{padding-inline:32px}.sc-footer-nav{max-width:400px}}
@media(min-width:1024px){.statistics-course-v2 h1{font-size:52px;line-height:1.3}.statistics-course-v2 h2{font-size:36px;line-height:1.4}.sc-section{padding-block:112px}.sc-hero{padding-block:100px 80px}.sc-hero-lead{font-size:23px}.sc-demo h3{font-size:26px}.sc-situations{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:32px}.sc-situation h3{font-size:20px}.sc-section-intro{margin-bottom:42px}}
@media(max-width:359px){.sc-container{padding-inline:20px}.statistics-course-v2 h1{font-size:28px}.statistics-course-v2 h2{font-size:26px}.sc-demo{padding:24px 16px}.sc-price-number{font-size:38px}.sc-course-facts{font-size:12px}.sc-header-inner{padding-inline:20px}}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}.sc-button{transition:background-color .18s,border-color .18s}.sc-demo-details[open] .sc-demo-reveal{animation:sc-open .2s ease-out}@keyframes sc-open{from{opacity:.6;transform:translateY(4px)}to{opacity:1;transform:none}}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.sc-header,.sc-menu,.sc-skip{display:none}.sc-main{padding-top:0}.sc-section,.sc-hero{padding-block:28px}.sc-section--dark{background:white;color:var(--sc-ink)}.sc-section--dark .sc-copy,.sc-section--dark .sc-note{color:var(--sc-body)}.sc-button{border-color:var(--sc-ink);background:white;color:var(--sc-ink)!important}}