#page-fretboard .fb-topbar{background:radial-gradient(circle at 0 0,#00d4b414,#0000 42%),linear-gradient(#12121aeb,#0c0c12d1);border:1px solid #ffffff0d;border-radius:16px;justify-content:space-between;align-items:center;gap:1rem;height:48px;margin-bottom:1.25rem;padding:0 1rem;display:flex;box-shadow:0 18px 50px #00000061,inset 0 1px #ffffff0a}#page-fretboard .fb-topbar__brand{align-items:center;gap:10px;min-width:0;display:flex}#page-fretboard .fb-topbar__copy{flex-direction:column;min-width:0;display:flex}#page-fretboard .fb-topbar__label{letter-spacing:.12em;text-transform:uppercase;color:var(--teal);white-space:nowrap;font-size:11px;font-weight:700}#page-fretboard .fb-topbar__sub{color:var(--muted);white-space:nowrap;font-size:10px}#page-fretboard .fb-topbar__center{justify-content:center;align-items:center;display:flex}#page-fretboard .fb-hero-metrics{align-items:center;gap:.6rem;display:flex}#page-fretboard 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.btn-title{letter-spacing:.5px;color:var(--text);font-size:.78rem;font-weight:800;line-height:1.2}.btn-library-premium .btn-subtitle{color:#f5c518bf;letter-spacing:.5px;margin-top:2px;font-size:.62rem;font-weight:500}.fret-action-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1.5rem;padding-top:.25rem;display:flex}@media (width<=992px){.fret-action-bar{flex-direction:column;align-items:stretch;gap:1.25rem}}.btn-play-premium{color:#050508;font-family:var(--font-body);letter-spacing:2px;cursor:pointer;background:linear-gradient(135deg,#00e0c0 0%,#00b09b 100%);border:none;border-radius:12px;justify-content:center;align-items:center;gap:.6rem;padding:.85rem 1.6rem;font-size:.78rem;font-weight:850;transition:all .25s cubic-bezier(.4,0,.2,1);display:inline-flex;box-shadow:0 12px 28px #00e0c040,inset 0 1px #ffffff3d}.btn-play-premium:hover{transform:translateY(-2px);box-shadow:0 16px 36px #00e0c061,inset 0 1px 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center no-repeat;border:none;outline:none;padding:.2rem 1.6rem .2rem .2rem;font-family:DM Mono,monospace;font-size:.72rem}.btn-toggle-premium{color:var(--text-muted);letter-spacing:1px;cursor:pointer;background:#ffffff05;border:1px solid #ffffff12;border-radius:12px;justify-content:center;align-items:center;height:38px;padding:.72rem 1.15rem .72rem 2rem;font-family:DM Mono,monospace;font-size:.7rem;transition:all .2s;display:inline-flex;position:relative}.btn-toggle-premium:before{content:"";background:#ffffff26;border-radius:50%;width:6px;height:6px;transition:all .2s;position:absolute;top:50%;left:.85rem;transform:translateY(-50%)}.btn-toggle-premium:hover{color:var(--text);background:#ffffff0f;transform:translateY(-1px)}.btn-toggle-premium.active{color:var(--text);background:linear-gradient(135deg,#00e0c012 0%,#00e0c003 100%);border-color:#00e0c047;box-shadow:0 4px 18px #00e0c014}.btn-toggle-premium.active:before{background:#00e0c0;box-shadow:0 0 7px #00e0c0,0 0 14px 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