/* Distraction-free lesson slides. Scoped so the catalog and homepage stay intact. */
.library-app:has(.library-lesson) { background:#f8faf9; }
.library-app:has(.library-lesson) .library-topbar { min-height:60px; padding:10px max(20px,env(safe-area-inset-right)) 10px max(20px,env(safe-area-inset-left)); }
.library-app:has(.library-lesson) .library-brand-button .brand-mark { font-size:1.42rem; }
.library-app:has(.library-lesson) .library-site-footer { display:none; }
.library-lesson { width:min(100%,1000px); padding:18px clamp(18px,3.5vw,38px) 48px; }
.library-lesson-top { min-height:36px; color:#6b7778; font-size:.73rem; }
.library-lesson-top .library-back { min-height:40px; padding:6px 4px 6px 0; }
.library-lesson-title { padding:16px 0 20px; border-bottom:0; }
.library-lesson-title .library-kicker { margin-bottom:8px; font-size:.64rem; letter-spacing:.12em; }
.library-lesson-title h1 { max-width:900px; margin:0; font-size:clamp(1.65rem,3.1vw,2.85rem); line-height:1.12; letter-spacing:-.052em; }
.library-step-nav { grid-template-columns:repeat(5,minmax(0,1fr)); gap:6px; margin:0 0 14px; padding:0; overflow:visible; }
.library-step-nav button { min-width:0; min-height:46px; gap:8px; padding:7px 8px; border-radius:9px; font-size:.75rem; line-height:1.15; justify-content:center; }
.library-step-nav button > span { flex:0 0 24px; width:24px; height:24px; font-size:.64rem; background:#e8eeeb; }
.library-step-nav button.current { background:#e1f3ef; border-color:#008f92; color:var(--charcoal); box-shadow:inset 0 -3px 0 var(--teal-dark); }
.library-step-nav button.current > span { background:var(--teal-dark); color:white; }
.library-step-nav button:disabled { opacity:.48; }
.library-stage { display:block; min-height:0; padding:22px 0 24px; }
.library-stage-heading { display:flex; flex-direction:row; align-items:center; justify-content:flex-start; gap:16px; border:0; padding:0; margin:0 auto 20px; max-width:780px; }
.library-step-number { flex:0 0 auto; display:grid; place-items:center; border:1px solid #c8dad5; border-radius:100px; min-width:58px; height:33px; font-size:.69rem; letter-spacing:.06em; }
.library-stage-heading h2 { font-size:clamp(1.6rem,2.7vw,2.5rem); line-height:1.12; margin:0; }
.library-stage-content { width:min(100%,780px); margin:0 auto; }
.library-instruction { max-width:730px; font-size:.98rem; color:#526160; line-height:1.5; margin:0 0 20px; }
.library-stage[data-stage="listen"] .library-stage-content { width:min(100%,720px); }
.library-audio { grid-template-columns:auto minmax(0,1fr) auto; gap:14px; padding:20px; border-radius:13px; margin:0 0 16px; }
.library-audio-icon { width:44px; height:44px; }
.library-audio-icon svg { width:22px; height:22px; }
.library-audio-info strong { font-size:1rem; }
.library-audio-buttons { gap:6px; }
.library-audio-buttons .library-primary,.library-audio-buttons .library-icon-button { min-height:44px; height:44px; }
.library-audio .library-inline-link { font-size:.73rem; padding-top:3px; }
.library-quiet-note { display:none; }
.library-read-listen { border:1px solid #d6e1dc; border-radius:10px; background:white; margin-bottom:15px; }
.library-read-listen > summary { display:flex; align-items:center; gap:9px; padding:12px 16px; cursor:pointer; font-size:.79rem; font-weight:800; color:#356d6d; list-style:none; }
.library-read-listen > summary::-webkit-details-marker { display:none; }
.library-read-listen > summary::after { content:'+'; margin-left:auto; font-size:1.1rem; line-height:1; }
.library-read-listen[open] > summary::after { content:'−'; }
.library-read-listen .library-audio { border-radius:0 0 9px 9px; margin:0; }
.library-clues { grid-template-columns:repeat(2,minmax(0,1fr)); gap:9px; margin-bottom:14px; }
.library-clue { min-height:52px; padding:10px 14px; background:white; border-radius:9px; font-size:.92rem; }
.library-guess { margin:14px 0 0; padding:clamp(18px,3vw,28px); border-radius:12px; }
.library-guess .library-kicker { display:none; }
.library-guess h3 { margin:0 0 16px; font-size:clamp(1.38rem,2.1vw,1.9rem); }
.library-guess-options { grid-template-columns:repeat(4,minmax(0,1fr)); }
.library-guess-choice { min-height:48px; border-radius:8px; }
.library-reading { border-radius:13px; padding:clamp(17px,3vw,30px); }
.library-reading-bar { padding-bottom:12px; letter-spacing:.07em; }
.library-reading-text { font-size:clamp(1.03rem,1.55vw,1.17rem); line-height:1.92; margin:18px 0 22px; }
.activity-reading .activity-help { margin:12px 0; font-size:.78rem; line-height:1.5; }
.activity-bank { border-radius:10px; background:#f6f8f6; padding:16px; margin:16px 0; }
.activity-tiles { gap:7px; }
.activity-tile { min-height:43px; border-radius:8px; }
.library-repairs { gap:12px; }
.library-repair-card { border-radius:13px; padding:clamp(19px,3vw,28px); }
.library-repair-card h3 { margin:10px 0 18px; }
.library-correction { border-radius:0 7px 7px 0; }
.activity-rule { border-left:4px solid var(--teal-dark); border-radius:0 11px 11px 0; padding:19px 22px; margin-bottom:15px; }
.activity-rule > p:not(.activity-rule-note) { font-size:1.03rem; font-weight:650; margin:9px 0 0; }
.activity-examples { border:1px solid #d4e1db; border-radius:10px; background:white; margin-bottom:24px; }
.activity-examples > summary { display:flex; align-items:center; gap:10px; padding:14px 16px; cursor:pointer; font-weight:800; font-size:.83rem; list-style:none; }
.activity-examples > summary::-webkit-details-marker { display:none; }
.activity-examples > summary::after { content:'+'; margin-left:auto; font-size:1.15rem; color:var(--teal-dark); }
.activity-examples[open] > summary::after { content:'−'; }
.activity-examples .library-grammar-grid { padding:0 15px 14px; }
.activity-examples .library-grammar-grid > div { padding:15px; border-radius:8px; }
.activity-examples .library-grammar-grid p { margin:9px 0 0; font-size:1.08rem; }
.activity-examples .library-grammar-note { margin:0 15px 15px; padding:12px; font-size:.83rem; border-radius:7px; }
.activity-examples .activity-rule-note { margin:0 15px 15px; }
.activity-quiz-heading { margin:24px 0 15px; }
.activity-quiz-heading h3 { font-size:clamp(1.4rem,2.2vw,2rem); margin:0; }
.activity-quiz-heading > span,.activity-quiz-heading > p { display:none; }
.activity-quiz-list { gap:14px; }
.activity-question { border-radius:12px; padding:clamp(16px,3vw,26px); }
.activity-question legend { font-size:1.04rem; margin-bottom:14px; }
.activity-question legend span { margin-bottom:5px; }
.activity-choice { border-radius:8px; min-height:48px; }
.library-source-details { width:min(100%,780px); margin:0 auto; padding:10px 0 16px; border:0; }
.library-source-details summary { color:#687775; font-weight:650; font-size:.73rem; }
.library-lesson-footer { position:sticky; z-index:12; bottom:0; width:min(100%,850px); margin:0 auto; padding:13px 0 max(13px,env(safe-area-inset-bottom)); background:rgba(248,250,249,.97); border-top:1px solid #dce7e1; backdrop-filter:blur(12px); box-shadow:0 -9px 20px rgba(24,40,36,.035); }
.library-lesson-footer > span { letter-spacing:.07em; }
.library-lesson-footer button { min-height:44px; border-radius:8px; }
@media (max-width:760px) {
  .library-lesson { padding:10px 18px 28px; }
  .library-lesson-title { padding:12px 0 16px; }
  .library-lesson-title h1 { font-size:clamp(1.5rem,5.7vw,2.35rem); }
  .library-step-nav { grid-template-columns:repeat(5,minmax(0,1fr)); gap:4px; margin:0 0 9px; padding:0; }
  .library-step-nav button { flex-direction:column; gap:4px; min-height:58px; padding:7px 2px; font-size:.63rem; text-align:center; }
  .library-step-nav button > span { flex:0 0 23px; width:23px; height:23px; }
  .library-stage { padding:14px 0 22px; }
  .library-stage-heading { flex-direction:row; gap:10px; margin-bottom:14px; border:0; padding:0; }
  .library-stage-heading h2 { font-size:clamp(1.48rem,5.3vw,2rem); }
  .library-step-number { min-width:51px; height:29px; }
  .library-instruction { font-size:.91rem; margin-bottom:14px; }
  .library-audio { grid-template-columns:44px minmax(0,1fr); padding:16px; gap:12px; }
  .library-audio-buttons { grid-column:1 / -1; }
  .library-audio-play { flex:1; }
  .library-clues { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .library-guess-options { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .library-lesson-footer { margin-inline:-18px; width:calc(100% + 36px); padding-inline:18px; }
}
@media (max-width:410px) {
  .library-lesson { padding-inline:14px; }
  .library-lesson-top > span { display:none; }
  .library-lesson-title h1 { font-size:1.52rem; }
  .library-step-nav button { font-size:.57rem; }
  .library-clues { grid-template-columns:1fr 1fr; gap:6px; }
  .library-clue { min-height:48px; padding:9px; gap:7px; font-size:.79rem; }
  .library-repair-card { padding:17px; }
  .library-lesson-footer { margin-inline:-14px; width:calc(100% + 28px); padding-inline:14px; }
}
@media (prefers-reduced-motion:reduce) { .library-app:has(.library-lesson) * { scroll-behavior:auto; } }