.reference-library-section{max-width:980px;margin:28px auto 0;padding:0 0 4px}
.reference-library-card{background:#fff;border:1px solid var(--line,#ded8ce);border-radius:24px;padding:28px;box-shadow:0 10px 30px rgba(23,33,43,.08)}
.reference-library-card h2{font-size:clamp(1.65rem,4vw,2.6rem);line-height:1.08;letter-spacing:-.03em;margin:8px 0 10px}
.reference-library-card>p{max-width:820px;line-height:1.65;color:var(--muted,#68727d)}
.reference-library-toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:20px 0 16px}
.reference-library-search{flex:1 1 320px;border:1px solid var(--line,#ded8ce);border-radius:14px;background:#fff;padding:12px 14px;font:inherit;color:inherit}
.reference-library-count{font-size:.9rem;font-weight:850;color:var(--muted,#68727d)}
.reference-library-list{display:grid;gap:12px}
.reference-module{border:1px solid var(--line,#ded8ce);border-radius:16px;background:#fbfaf7;overflow:hidden}
.reference-module summary{cursor:pointer;display:flex;align-items:center;gap:10px;justify-content:space-between;padding:15px 16px;font-weight:900;list-style:none}
.reference-module summary::-webkit-details-marker{display:none}
.reference-module summary::after{content:'＋';font-size:1.15rem;line-height:1}
.reference-module[open] summary::after{content:'−'}
.reference-module-body{padding:0 16px 16px;border-top:1px solid var(--line,#ded8ce)}
.reference-learning-group{margin-top:14px}
.reference-learning-group h3{font-size:.78rem;letter-spacing:.09em;text-transform:uppercase;margin:0 0 7px;color:var(--accent,#b43b2f)}
.reference-learning-group ul{margin:0;padding-left:20px;line-height:1.55}
.reference-module-link{display:inline-flex;margin-top:14px;border:1px solid var(--line,#ded8ce);border-radius:999px;padding:8px 12px;text-decoration:none;font-weight:900;color:inherit;background:#fff}
.reference-module-link:hover{border-color:var(--accent2,#174f4b)}
.reference-library-empty{padding:18px;border-radius:14px;background:#edf4f3;border:1px solid #cfe0dd;line-height:1.55}
.reference-library-open{display:inline-flex;margin-top:18px;text-decoration:none;font-weight:950;color:var(--accent2,#174f4b)}
.reference-library-note{font-size:.92rem;color:var(--muted,#68727d);margin-top:10px}
@media(max-width:620px){.reference-library-card{padding:20px}.reference-module summary{align-items:flex-start}.reference-library-toolbar{display:block}.reference-library-search{width:100%;margin-bottom:8px}}