/* Gramer konuları. Level tabs (ba-level-tabs), the topic list (ba-toc) and search (ba-search) come from base.css. */
.grammar-hub{--gh-ink:var(--ba-ink);--gh-muted:var(--ba-muted);--gh-card:var(--ba-paper);--gh-line:var(--ba-line)}
.grammar-hub .grammar-hero-copy{width:100%;max-width:none}
.grammar-browser{padding:clamp(8px,2vw,24px) 0 0}
.grammar-browser-inner{width:100%;margin:0}

/* Toolbar: heading and search */
.grammar-toolbar{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,400px);align-items:end;gap:20px 32px;margin-bottom:24px}
.grammar-toolbar-copy h2{margin:0 0 8px}
.grammar-toolbar-copy p{margin:0;color:var(--ba-ink)}
.grammar-search-note{display:none;margin:0 0 20px;color:var(--ba-muted);font-size:var(--ba-small)}
.grammar-search-note.visible{display:block}

/* Topic list heading */
.grammar-section-heading{display:flex;justify-content:space-between;align-items:end;gap:16px;margin:0 0 18px}
.grammar-section-heading h3{margin:0 0 4px;font-family:var(--ba-serif);font-weight:400;font-size:clamp(1.75rem,1.3rem + 1.4vw,2.5rem);letter-spacing:-.02em}
.grammar-section-heading p{margin:0;color:var(--ba-ink)}
.grammar-result-count{flex:none;font-size:var(--ba-small);color:var(--ba-muted);font-variant-numeric:tabular-nums}
/* Topics without a full lesson yet (B2) */
.grammar-detail{display:none}
.grammar-detail.active{display:block}
.grammar-list-view.hidden{display:none}
.grammar-detail-card{max-width:860px;padding:clamp(24px,4vw,56px);background:var(--ba-paper);border:0;border-radius:var(--ba-radius);box-shadow:none}
.grammar-detail-breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:20px;font-size:var(--ba-small);color:var(--ba-muted)}
.grammar-detail-breadcrumb button{min-height:44px;border:0;padding:0;background:none;color:var(--ba-ink);font:inherit;font-weight:600;text-decoration:underline;text-underline-offset:4px;cursor:pointer}
.grammar-detail-title{margin:8px 0 12px}
.grammar-detail-intro{max-width:60ch;margin:0;color:var(--ba-ink);font-size:var(--ba-lead);line-height:1.5}
.grammar-coming-soon{margin-top:28px;padding:24px;border-radius:var(--ba-radius-small);background:var(--ba-paper-2);color:var(--ba-ink)}
.grammar-coming-soon small{display:block;margin-bottom:6px;color:var(--ba-muted);font-weight:600;font-size:var(--ba-small)}
.grammar-coming-soon h4{margin:0 0 6px;font-family:var(--ba-serif);font-size:var(--ba-lead)}
.grammar-coming-soon p{margin:0;color:var(--ba-ink)}
.grammar-detail-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.grammar-detail-actions button{min-height:52px;padding:0 22px;border:0;border-radius:0;font:600 var(--ba-body) var(--ba-sans);cursor:pointer;transition:background-color .2s}
.grammar-back-btn{background:var(--ba-paper-2);color:var(--ba-ink)}
.grammar-back-btn:hover{background:var(--ba-line)}
.grammar-exercises-btn{background:var(--ba-accent);color:var(--ba-accent-ink)}
.grammar-exercises-btn:hover{background:var(--ba-accent-hover)}

@media(max-width:900px){
  .grammar-toolbar{grid-template-columns:1fr;align-items:stretch}
}
@media(max-width:620px){
  .grammar-section-heading{flex-direction:column;align-items:flex-start}
  .grammar-detail-actions button{flex:1 1 100%}
}
.grammar-hub:has(.grammar-detail.active) .page-hero{display:none}