.breadcrumb{max-width:1080px;margin:0 auto;padding:.75rem 1.5rem;border-bottom:1px solid var(--border-light)}.breadcrumb-list{display:flex;align-items:center;gap:.5rem;list-style:none;font-size:.8125rem;color:var(--text-muted)}.breadcrumb-item a{color:var(--text-secondary);text-decoration:none;transition:color .2s ease;white-space:nowrap}.breadcrumb-item a:hover{color:var(--text)}.breadcrumb-separator{color:var(--text-muted)}.breadcrumb-item.active{color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:calc(100vw - 200px)}.song-header{max-width:1080px;margin:0 auto;padding:2.5rem 1.5rem 1.5rem;border-bottom:1px solid var(--border-light)}.song-meta{display:flex;gap:.5rem;margin-bottom:.875rem;flex-wrap:wrap}.song-badge{font-size:.6875rem;text-transform:uppercase;letter-spacing:.05em;padding:.25rem .625rem;background:var(--bg);border:1px solid var(--border);border-radius:4px;color:var(--text-muted)}.song-badge.key{background:var(--accent-light);border-color:transparent;color:var(--accent);font-weight:500}.song-title{font-family:"Instrument Serif",Georgia,serif;font-size:clamp(2rem,5vw,2.75rem);font-weight:400;line-height:1.15;margin-bottom:.375rem;letter-spacing:-.02em}.song-artist{font-size:1.0625rem;color:var(--text-secondary)}.song-artist a{color:inherit;text-decoration:none;border-bottom:1px solid var(--border);transition:border-color .2s ease}.song-artist a:hover{border-color:var(--text-secondary)}.toolbar{max-width:1080px;margin:0 auto;padding:1.25rem 1.5rem;display:flex;gap:.625rem;flex-wrap:wrap;align-items:center;border-bottom:1px solid var(--border-light)}.tool-group{display:flex;align-items:center;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;overflow:hidden}.tool-label{font-size:.75rem;color:var(--text-muted);padding:.5rem .75rem;border-right:1px solid var(--border);background:var(--bg)}.tool-btn{background:transparent;border:none;padding:.5rem .75rem;font-size:.875rem;font-family:inherit;color:var(--text);cursor:pointer;transition:background .15s ease;display:flex;align-items:center;justify-content:center}.tool-btn:hover{background:var(--bg)}.tool-value{font-weight:600;min-width:2rem;text-align:center;padding:.5rem .25rem;font-size:.875rem}.tool-single{display:flex;align-items:center;gap:.5rem;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:.5rem .875rem;font-size:.8125rem;color:var(--text-secondary);cursor:pointer;transition:all .15s ease}.tool-single:hover{border-color:var(--text-muted);color:var(--text)}.tool-single.playing{background:var(--accent);border-color:var(--accent);color:#fff}.tool-single svg{width:16px;height:16px}.toolbar-spacer{flex:1}.chord-detail-main{max-width:1080px;margin:0 auto;padding:2rem 1.5rem 3rem;display:grid;grid-template-columns:1fr 280px;gap:2rem;align-items:start}.chord-sheet{font-family:JetBrains Mono,SF Mono,monospace;font-size:1rem;line-height:2.1;white-space:pre-wrap}.chord-line{margin-bottom:.125rem}.chord-line.section{color:var(--text-muted);font-size:.8125em;margin-top:2rem;margin-bottom:.625rem;font-weight:500;letter-spacing:.02em}.chord-line.section:first-child{margin-top:0}.lyric-line{color:var(--text);margin-bottom:.875rem}.chord{color:var(--chord-color);font-weight:500}.sidebar{position:sticky;top:1.5rem}.sidebar-card{background:var(--bg-card);border:1px solid var(--border-light);border-radius:10px;padding:1.25rem}.sidebar-title{font-size:.875rem;font-weight:600;color:var(--text);margin-bottom:1rem}.related-list{display:flex;flex-direction:column;gap:.5rem}.related-list .related-item{display:block;padding:.75rem;background:var(--bg);border:1px solid var(--border-light);border-radius:8px;text-decoration:none;transition:border-color .2s ease,transform .2s ease}.related-list .related-item:hover{border-color:var(--border);transform:translate(2px)}.related-list .related-item-title{font-size:.875rem;font-weight:500;color:var(--text);margin-bottom:.125rem;line-height:1.3}.related-list .related-item-artist{font-size:.75rem;color:var(--text-muted)}.related-section{max-width:1080px;margin:0 auto;padding:0 1.5rem 4rem}.related-header{padding-top:2.5rem;margin-bottom:1.25rem;border-top:1px solid var(--border-light)}.related-title{font-family:"Instrument Serif",Georgia,serif;font-size:1.25rem;font-weight:400}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.75rem}.related-item{display:block;padding:1rem 1.125rem;background:var(--bg-card);border:1px solid var(--border-light);border-radius:10px;text-decoration:none;transition:border-color .2s ease,transform .2s ease}.related-item:hover{border-color:var(--border);transform:translateY(-1px)}.related-item-title{font-size:.9375rem;font-weight:500;color:var(--text);margin-bottom:.25rem;line-height:1.3}.related-item-artist{font-size:.8125rem;color:var(--text-muted)}@media (max-width: 900px){.chord-detail-main{grid-template-columns:1fr;gap:1.5rem}.sidebar{position:static}}@media (max-width: 600px){.breadcrumb{padding:.625rem 1rem}.breadcrumb-list{font-size:.75rem}.song-header{padding:2rem 1rem 1.25rem}.toolbar{padding:1rem;gap:.5rem}.tool-label{display:none}.chord-detail-main{padding:1.5rem 1rem 2.5rem;grid-template-columns:1fr;gap:1.5rem}.chord-sheet{font-size:.9375rem}.related-section{padding:0 1rem 3rem}.related-grid{grid-template-columns:1fr}.sidebar{position:static;order:-1}.sidebar-card{margin-bottom:0}}@media print{header,.toolbar,.related-section,footer,.sidebar{display:none!important}.chord-detail-main{padding:0;max-width:100%;grid-template-columns:1fr}.song-header{padding:0 0 1rem;max-width:100%;border:none}.chord-sheet{font-size:11pt}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.chord-sheet{animation:fadeIn .4s ease}