.reader-static main.reader-main{max-width:1280px;padding:28px 42px 36px}.reader-static article.reader-card[hidden]{display:none}.reader-static .sidebar.reader-sidebar{width:260px;padding:30px 22px}.reader-static .brand{font-size:27px}.reader-static .edition{font-size:12px;margin:18px 0}.reader-static .nav-item.reader-nav-item{width:100%;margin:4px 0}.reader-static .nav-item.reader-nav-item b{font-size:14px}.reader-static .reader-toolbar{display:flex}.reader-static .reader-disclosure>summary{display:flex;font-size:15px;background:#f7faf9;color:#275e67;padding:14px 18px;list-style:none}.reader-static .reader-disclosure>summary::after{content:'＋';margin-left:auto}.reader-static .reader-disclosure[open]>summary::after{content:'−'}.reader-static .reader-disclosure-body{padding:12px 20px 20px}.reader-static .reader-disclosure-body[data-animate=true]{animation:reader-reveal .6s both}.reader-static .reader-disclosure .pre,.reader-static .reader-disclosure .strategy,.reader-static .reader-disclosure .transfer{margin:0;border:0}.reader-static .reader-disclosure .strategy h2{font-size:19px}.reader-static .reader-disclosure .mark-group{margin:15px 0}.reader-static .reader-heading h1{font-size:27px;line-height:1.5}.reader-static .reader-heading .eyebrow{display:none}.reader-static .reader-heading .source{margin-top:18px}.reader-static .side-foot{font-size:12px}.reader-static .reader-static-backdrop:not([hidden]){display:block;position:fixed;inset:0;z-index:29;background:#102d3655;border:0}.reader-static figure{max-width:100%}.reader-static .math{max-width:100%}.reader-static .reader-card .question{margin:24px 0}.reader-static .reader-toolbar a{font-size:13px}.reader-static .reader-close{margin-bottom:20px}
@media(max-width:1100px) and (min-width:761px){.reader-static .sidebar.reader-sidebar{width:220px}.reader-static main.reader-main{margin-left:220px;padding:22px}.reader-static article.reader-card{padding:28px}.reader-static .reader-heading h1{font-size:24px}}
@media(max-width:760px){.reader-static .sidebar.reader-sidebar{position:fixed;inset:0 auto 0 0;width:min(310px,85vw);padding:24px 20px}.reader-static .sidebar nav{display:block;overflow:visible;margin-top:15px}.reader-static .nav-item.reader-nav-item{min-width:0;display:flex}.reader-static .nav-item small,.reader-static .edition,.reader-static .side-foot{display:block}.reader-static main.reader-main{margin:0;padding:15px 12px 28px}.reader-static article.reader-card{padding:23px 17px}.reader-static .reader-heading h1{font-size:21px}.reader-static .reader-disclosure-body{padding:10px 13px 16px}.reader-static .reader-toolbar a{font-size:12px}.reader-static .reader-toolbar{display:flex}.reader-static .reader-toolbar span{display:inline}.reader-static .reader-disclosure>summary{font-size:14px;padding:13px}.reader-static .reader-close{display:flex}.reader-static .sidebar .brand span{display:block;margin:6px 0 0}}
.reader-static .sidebar .brand{color:#fff}.reader-static .nav-item .num{flex:0 0 23px;white-space:nowrap}.reader-static .nav-item b{display:block}
@media(prefers-reduced-motion:reduce){.reader-static .reader-disclosure-body[data-animate=true]{animation:none}}

.reader-static .solution-body>h3{margin:30px 0 16px;padding-top:20px;border-top:1px solid #e3ece7;font-size:19px;color:#164d49}
.reader-static .solution-body>h3:first-of-type{margin-top:6px;border-top:0}.reader-static .solution-body{line-height:1.9}
.reader-static .strategy h2{font-size:18px;line-height:1.6}.reader-static .solution-body[data-animate=true]{animation:none}
.reader-static .solution-body[data-animate=true]>.reader-reveal-block{animation-duration:.4s}
.reader-static .nav-item b{overflow-wrap:anywhere;white-space:normal}.reader-static .hints,.reader-static .transfer{margin-top:24px}