:root{--gct-primary:#6D5DFB;--gct-primary-dark:#5546DF;--gct-soft:#F1EFFF;--gct-accent:#168C63;--gct-capo:#D97706;--gct-text:#172033;--gct-muted:#667085;--gct-border:#E5E7EB;--gct-bg:#fff;--gct-radius:18px;--gct-shadow:0 12px 34px rgba(23,32,51,.08)}
.gct-app{max-width:1050px;margin:0 auto;color:var(--gct-text);font-family:inherit;line-height:1.6}
.gct-app *{box-sizing:border-box}.gct-hero,.gct-card,.gct-note-card{background:var(--gct-bg);border:1px solid var(--gct-border);border-radius:var(--gct-radius);box-shadow:var(--gct-shadow)}
.gct-hero{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;padding:24px;margin-bottom:18px}.gct-hero h2,.gct-card h3{margin:0 0 8px}.gct-hero p,.gct-muted{color:var(--gct-muted);margin:0}.gct-badge{background:var(--gct-soft);color:var(--gct-primary-dark);padding:7px 10px;border-radius:999px;font-weight:700;font-size:13px;white-space:nowrap}
.gct-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:18px}.gct-card{padding:22px;margin-bottom:18px}.gct-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:16px}.gct-app label{display:block;font-weight:700;margin-bottom:6px}.gct-app textarea,.gct-app select,.gct-app input{width:100%;min-height:48px;border:1px solid var(--gct-border);border-radius:12px;padding:11px 13px;font:inherit;font-size:16px;background:#fff;color:var(--gct-text)}.gct-app textarea{resize:vertical;min-height:190px}.gct-app :focus-visible{outline:3px solid rgba(109,93,251,.24);outline-offset:2px;border-color:var(--gct-primary)}
.gct-actions,.gct-result-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.gct-btn{min-height:48px;border:1px solid var(--gct-border);border-radius:12px;background:#fff;color:var(--gct-text);padding:10px 15px;font-weight:700;cursor:pointer;transition:.18s ease}.gct-btn:hover{transform:translateY(-1px);border-color:#cdd2dc}.gct-btn:disabled{opacity:.55;cursor:not-allowed;transform:none}.gct-primary{background:var(--gct-primary);border-color:var(--gct-primary);color:#fff}.gct-primary:hover{background:var(--gct-primary-dark)}
.gct-help{font-size:14px;color:var(--gct-muted);margin:12px 0 0}.gct-result-head,.gct-section-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.gct-status{background:#ECFDF3;color:var(--gct-accent);font-weight:800;border-radius:999px;padding:6px 10px;font-size:13px}.gct-output{min-height:260px;white-space:pre-wrap;word-break:break-word;background:#F8FAFC;border:1px solid var(--gct-border);border-radius:14px;padding:16px;margin:16px 0 0;font:500 15px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace}
.gct-capo-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:15px}.gct-capo-option{border:1px solid var(--gct-border);border-radius:14px;padding:14px}.gct-capo-option strong{display:block}.gct-capo-score{color:var(--gct-capo);font-weight:800;font-size:13px}.gct-empty{color:var(--gct-muted);margin:0}.gct-mapping{overflow:auto;margin-top:14px}.gct-map-table{width:100%;border-collapse:collapse;min-width:520px}.gct-map-table th,.gct-map-table td{text-align:left;border-bottom:1px solid var(--gct-border);padding:10px}.gct-diagrams{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}.gct-diagram{border:1px solid var(--gct-border);border-radius:14px;padding:14px}.gct-fret{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;margin-top:9px}.gct-string{height:86px;border-left:1px solid #9AA4B2;position:relative}.gct-dot{position:absolute;width:13px;height:13px;border-radius:50%;background:var(--gct-primary);left:-7px;transform:translateY(-50%)}.gct-fret-pos-1{top:26px}.gct-fret-pos-2{top:38px}.gct-fret-pos-3{top:50px}.gct-fret-pos-4{top:62px}.gct-fret-pos-5{top:74px}.gct-open,.gct-mutedmark{text-align:center;font-size:12px;color:var(--gct-muted)}
.gct-history{display:grid;gap:10px;margin-top:14px}.gct-history-item{border:1px solid var(--gct-border);border-radius:12px;padding:12px}.gct-history-item button{margin-top:8px}.gct-note-card{padding:16px 20px;background:#FAFAFF}.gct-note-card p{margin:5px 0}.gct-live{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}
@media(max-width:800px){.gct-grid{grid-template-columns:1fr}.gct-capo-list,.gct-diagrams{grid-template-columns:1fr 1fr}}@media(max-width:560px){.gct-hero,.gct-result-head,.gct-section-head{flex-direction:column}.gct-fields,.gct-capo-list,.gct-diagrams{grid-template-columns:1fr}.gct-card,.gct-hero{padding:17px}.gct-btn{width:100%}}