.lesson-library{--lesson-muted:#526b83;--lesson-success:#216b44;--lesson-success-bg:#edf8f1;max-width:960px;padding-bottom:40px}
.lesson-heading{margin:28px 0 22px}
.lesson-heading h1{font-size:clamp(1.8rem,3vw,2.3rem);line-height:1.2;margin:0 0 6px}
.lesson-heading p{margin:0;color:var(--lesson-muted)}
.lesson-next{display:flex;align-items:center;gap:24px;padding:26px 30px;border:1px solid var(--line);border-radius:22px;background:var(--card);box-shadow:0 8px 24px rgba(16,49,91,.05)}
.lesson-next>img{object-fit:contain;flex:0 0 90px}
.lesson-next>div{min-width:0;flex:1}
.lesson-kicker{color:var(--lesson-muted);font-size:.8rem;font-weight:700;margin:0 0 5px}
.lesson-next h2{font-size:1.65rem;line-height:1.2;margin:0 0 8px;color:var(--text)}
#lessonNextNote{color:var(--lesson-muted);margin:0 0 18px;line-height:1.5}
.lesson-next__button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;text-decoration:none;border-radius:12px;background:var(--apc-blue);color:#fff;font-weight:700}
.lesson-next__button:hover{background:var(--apc-blue-strong);color:#fff}
.lesson-program-heading{display:flex;gap:12px;align-items:center;justify-content:space-between;margin:28px 0 14px}
.lesson-program-heading h2{margin:0;font-size:1.15rem}
#lmapDone{color:var(--lesson-muted);font-size:.85rem}
.lesson-chapter,.lesson-coming{border:1px solid var(--line);background:var(--card);border-radius:16px;margin-bottom:12px;overflow:hidden}
.lesson-chapter>summary,.lesson-coming>summary{padding:18px 20px;min-height:56px;cursor:pointer;font-weight:700;color:var(--text)}
.lesson-chapter__title{margin-left:6px}
.lesson-chapter__count{float:right;margin-left:12px;color:var(--lesson-muted);font-weight:500;font-size:.85rem}
.lesson-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:4px 16px 16px;margin:0}
.lesson-item{display:flex;align-items:center;gap:12px;min-height:76px;height:100%;padding:12px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text);background:var(--card)}
a.lesson-item:hover{border-color:var(--brand);background:var(--brand-soft)}
.lesson-number{display:grid;place-items:center;width:38px;height:38px;flex:0 0 38px;border-radius:50%;background:var(--bg);color:var(--lesson-muted);font-weight:700}
.lesson-item__copy{min-width:0;display:grid;gap:3px}
.lesson-item__title{font-weight:650;line-height:1.3;overflow-wrap:anywhere}
.lesson-item__state{font-size:.78rem;line-height:1.4;color:var(--lesson-muted)}
.lesson-item.is-current{border:2px solid var(--brand);background:var(--brand-soft)}
.is-current .lesson-number{background:var(--brand);color:white}
.is-done .lesson-number{background:var(--lesson-success-bg);color:var(--lesson-success)}
.lesson-coming{margin-top:20px}
.lesson-coming p,.lesson-coming ul{margin:0 20px 18px;color:var(--lesson-muted);line-height:1.6}
.lesson-coming ul{padding-left:20px}
.lesson-library a:focus-visible,.lesson-library summary:focus-visible{outline:3px solid #187ac4;outline-offset:3px}
html[data-theme="dark"] .lesson-library{--lesson-muted:#b9cde0;--lesson-success:#aae0b8;--lesson-success-bg:#18382c}
@media(max-width:600px){
  .lesson-library{padding-left:14px;padding-right:14px}
  .lesson-heading{margin:20px 0 16px}
  .lesson-heading p{font-size:.95rem}
  .lesson-next{gap:12px;padding:20px 16px;align-items:flex-start}
  .lesson-next>img{width:54px;height:72px;flex-basis:54px}
  .lesson-next h2{font-size:1.4rem}
  #lessonNextNote{font-size:.9rem}
  .lesson-next__button{width:100%;padding:12px;font-size:.9rem}
  .lesson-list{grid-template-columns:1fr;padding:2px 12px 12px}
  .lesson-chapter>summary,.lesson-coming>summary{padding:16px 12px;font-size:.94rem}
  .lesson-chapter__count{float:none;display:block;margin:4px 0 0 20px}
}