#explain [hidden]{display:none!important}
#explain .learn-search{margin:26px 0 20px;max-width:640px}
#explain .learn-search label{display:block;font-size:15px;font-weight:750;margin-bottom:8px}
#explain .learn-search input{width:100%;border:1px solid #cdd8d3;border-radius:12px;background:#fff;padding:14px 16px;font:inherit;color:#142b4b}
#learn-search-count{font-size:14px;color:#596b65;margin:8px 0;min-height:20px}
#explain .learn-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}
#explain .learn-chapter{margin:0;border:1px solid #dce3df;border-radius:18px;overflow:hidden;background:#fff}
#explain button.learn-chapter-head{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:22px;margin:0;background:#fff;color:#142b4b;border:0;border-radius:0;box-shadow:none;white-space:normal}
.learn-topic-icon{flex:0 0 46px;height:46px;display:grid;place-items:center;border-radius:14px;background:#fff}
.learn-topic-copy{flex:1;min-width:0}.learn-topic-copy strong{display:block;font-size:18px;line-height:1.35}.learn-topic-copy>span{display:block;font-size:14px;font-weight:400;color:#586d65;margin-top:5px}.learn-chevron{font-size:24px;color:#226b60}
#explain .learn-goals{padding:0 20px 8px}
#explain button.learn-goal{display:flex;justify-content:space-between;align-items:center;gap:15px;width:100%;padding:17px 0;border:0;border-top:1px solid #e6ebe7;border-radius:0;background:#fff;text-align:left;color:#142b4b;white-space:normal;box-shadow:none;margin:0}
#explain .learn-goal strong{font-size:16px;line-height:1.45;display:block}.learn-goal-status{display:block;font-size:13px;font-weight:400;color:#64736c;margin-top:5px}
#explain button.learn-goal:hover,#explain button.learn-chapter-head:hover{background:#f6faf7}
#explain .learn-advice{margin-top:24px;padding-top:18px;border-top:1px solid #e1e7e3;font-size:14px;color:#5e7168}
#explain .learn-advice button{background:none;box-shadow:none;border:0;color:#21594d;padding:6px;text-decoration:underline;font-size:14px;white-space:normal;text-align:left}
#explain .learn-back{background:#fff;color:#21594d;border:1px solid #dce3df;padding:12px 18px;border-radius:12px;margin:0 0 18px;box-shadow:none}
#explain .learn-detail{max-width:860px;margin:0 auto}
#explain .lesson-reader .lesson-objective{background:#eaf6f0;border-color:#78b7a0}
#explain .lesson-reader .lesson-objective h3{color:#21594d}
#explain button:focus-visible,#explain input:focus-visible{outline:3px solid #287664;outline-offset:3px}
@media(max-width:800px){#explain .learn-list{grid-template-columns:1fr}#explain button.learn-chapter-head{padding:18px}}