/* Scoped styles for the course-first/reference-library pilot. */
.ref-course-routes{display:flex;gap:8px;flex-wrap:wrap;align-items:center;padding:14px 0 20px}
.ref-course-routes a,.ref-lesson-help a,.ref-related a,.ref-lessons a{display:inline-block;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);font-weight:600}
.ref-course-routes span{font-size:.8rem;color:var(--ink-soft);margin-left:auto}
.ref-lesson-help{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:18px;font-size:.9rem}
.ref-lesson-help strong{flex-basis:100%}
.ref-dialog{color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:0 24px 24px;width:min(760px,calc(100% - 28px));max-height:85vh;max-height:85dvh;box-shadow:var(--shadow-lg);line-height:1.65;overscroll-behavior:contain}
.ref-dialog::backdrop{background:rgba(12,25,43,.6)}
.ref-dialog-bar{display:flex;align-items:center;gap:16px;justify-content:space-between;background:var(--paper);position:sticky;top:0;padding:18px 0;z-index:1;border-bottom:1px solid var(--line);margin-bottom:20px}
.ref-dialog-bar h2{font-size:1.25rem;margin:0}
.ref-dialog-bar button{flex-shrink:0}
.ref-dialog .ref-entry{padding:0;border:0;box-shadow:none}
.ref-dialog-index{padding:0;list-style:none}
.ref-dialog-index li{padding:12px 0;border-bottom:1px solid var(--line)}
.ref-dialog-index a{font-weight:700;display:inline-block;padding:5px 0}
.ref-dialog-index span{display:block;color:var(--ink-soft)}
.ref-library{max-width:1180px;margin:auto;padding:28px 22px 60px}
.ref-header{max-width:790px;margin:22px 0 30px}
.ref-header h1{font-size:clamp(2rem,4vw,3rem)}
.ref-kicker{color:var(--brand-dark);font-size:.8rem;font-weight:750;text-transform:uppercase;letter-spacing:.1em}
.ref-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:32px;align-items:start}
.ref-directory{position:sticky;top:24px;padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:12px}
.ref-directory h2{font-size:1.2rem}
.ref-directory ol{padding-left:22px;margin:12px 0 0}
.ref-directory li{margin:6px 0}
.ref-directory a{display:inline-block;padding:5px 0}
.ref-search label{display:block;font-weight:700;margin-bottom:5px}
.ref-search input{width:100%;min-width:0;border:1px solid var(--muted);border-radius:7px;padding:10px;font:inherit;background:var(--paper);color:var(--ink)}
.ref-search button{margin:10px 0}
.ref-search p{font-size:.9rem;margin-bottom:0}
.ref-entry{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:28px;margin-bottom:24px;scroll-margin-top:24px;overflow-wrap:anywhere;max-width:100%}
.ref-entry h2{font-size:1.8rem}
.ref-entry h3{font-family:var(--serif);font-size:1.7rem}
.ref-entry h4{font-size:1rem;margin:0 0 10px}
.ref-summary{font-size:1.12rem;color:var(--ink-soft)}
.ref-example,.ref-practice{padding:18px;border-left:3px solid var(--brand);background:var(--bg-tint);border-radius:0 8px 8px 0;margin:18px 0}
.ref-practice{border-left-color:var(--green)}
.ref-entry summary{cursor:pointer;font-weight:650;padding:8px 0;min-height:40px}
.ref-entry details p{margin-top:10px}
.ref-sources{border-top:1px solid var(--line);padding-top:6px;margin-top:18px;font-size:.9rem}
.ref-sources li{margin:14px 0}
.ref-new-tab{font-size:.85em}
.ref-related,.ref-lessons{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:18px;font-size:.9rem}
.ref-related strong,.ref-lessons strong{flex-basis:100%}
.ref-footer{border-top:1px solid var(--line);padding-top:24px;margin-top:30px;color:var(--ink-soft)}
.ref-library [hidden],.ref-dialog [hidden]{display:none!important}
@media(max-width:740px){
  .ref-layout{grid-template-columns:minmax(0,1fr);gap:20px}
  .ref-directory{position:static}
  .ref-directory ol{columns:2;column-gap:24px}
  .ref-entry{padding:20px}
  .ref-dialog{padding:0 16px 18px}
  .ref-dialog-bar{gap:8px}
  .ref-dialog-bar h2{font-size:1rem}
  .ref-dialog-bar button{font-size:.85rem;padding:9px}
  .ref-course-routes span{margin-left:0;flex-basis:100%}
}
@media print{
  .ref-directory,.ref-course-routes,.ref-lesson-help{display:none}
  .ref-layout{display:block}
  .ref-library .ref-entry[hidden]{display:block!important}
  .ref-entry{break-inside:avoid;border-color:#bbb}
}