:root{--card:#fdfdfd;--ring:#000;--input:#ebebeb;--muted:#f5f5f5;--accent:#e2ebff;--border:#e7e7ee;--radius:1.4rem;--primary:#7033ff;--sidebar:#f5f8fb;--secondary:#edf0f4;--background:#fdfdfd;--foreground:#000;--destructive:#e54b4f;--muted-foreground:#525252;--accent-foreground:#1e69dc;--primary-foreground:#fff;--popover:#fcfcfc;--popover-foreground:#000;--card-foreground:#000;--secondary-foreground:#080808;--destructive-foreground:#fff;--font-sans:"Heebo", sans-serif;--font-serif:"Bellefair", serif;--font-mono:"IBM Plex Mono", monospace;--letter-spacing:-.025em;--shadow-color:#000;--shadow-opacity:.16;--shadow-offset-y:2px;--shadow-blur:3px;--purple:var(--primary);--violet:#a855f7;--purple-lt:var(--accent);--purple-bd:#7033ff40;--pink:var(--destructive);--bg:var(--background);--surface:var(--card);--surface2:var(--secondary);--text:var(--foreground);--grad:linear-gradient(135deg, var(--primary) 0%, var(--destructive) 100%);--sidebar-w:272px;--nav-h:64px}.dark{--card:#222327;--ring:#8c5cff;--input:#33353a;--muted:#2a2c33;--accent:#1e293b;--border:#33353a;--primary:#8c5cff;--sidebar:#161618;--secondary:#2a2c33;--background:#1a1b1e;--foreground:#f0f0f0;--destructive:#f87171;--muted-foreground:#a0a0a0;--accent-foreground:#79c0ff;--primary-foreground:#fff;--popover:#222327;--popover-foreground:#f0f0f0;--card-foreground:#f0f0f0;--secondary-foreground:#f0f0f0;--destructive-foreground:#fff}*{box-sizing:border-box;letter-spacing:var(--letter-spacing);margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);direction:rtl;flex-direction:column;height:100vh;display:flex}nav{height:var(--nav-h);background:var(--surface);border-bottom:1px solid var(--border);z-index:200;flex-shrink:0;justify-content:space-between;align-items:center;padding:0 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a{color:var(--muted-foreground);white-space:nowrap;-webkit-user-select:none;user-select:none;border-radius:8px;padding:6px 16px;font-size:.83rem;font-weight:500;text-decoration:none;transition:color .18s;display:block}.nav-tabs a.active{color:var(--text);font-weight:700}.nav-right{align-items:center;gap:12px;display:flex}.neon-btn{cursor:pointer;font-size:.83rem;font-weight:600;font-family:var(--font-sans);white-space:nowrap;border:1px solid;border-radius:9999px;align-items:center;gap:6px;text-decoration:none;transition:background .2s,border-color .2s,opacity .2s;display:inline-flex;position:relative;overflow:visible}.neon-btn:before{content:"";background:linear-gradient(90deg, transparent, var(--neon-color,#7033ff), transparent);opacity:0;height:1px;transition:opacity .4s;position:absolute;top:0;left:12.5%;right:12.5%}.neon-btn:after{content:"";background:linear-gradient(90deg, transparent, var(--neon-color,#7033ff), transparent);opacity:.2;height:1px;transition:opacity 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var(--border);background:linear-gradient(135deg,#4f8ef7,#7c3aed);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:.7rem;font-weight:700;display:flex}.user-chevron{color:var(--muted-foreground);flex-shrink:0;transition:transform .18s}.user-btn.open .user-chevron{transform:rotate(180deg)}.ud-dropdown{z-index:500;direction:rtl;background:#f5f5f5;border-radius:18px;width:300px;padding:5px;animation:.16s cubic-bezier(.4,0,.2,1) dropIn;display:none;position:absolute;top:calc(100% + 10px);left:0;box-shadow:0 10px 44px #00000024}.ud-dropdown.open{display:block}@keyframes dropIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.ud-card{background:#fff;border:1px solid #ebebeb;border-radius:14px;padding:4px;box-shadow:0 1px 4px #0000000d}.ud-header{align-items:center;gap:10px;padding:10px;display:flex}.ud-avatar-lg{color:#fff;background:linear-gradient(135deg,#4f8ef7,#7c3aed);border:2px solid #e7e7ee;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:.85rem;font-weight:700;display:flex}.ud-header-info{flex:1;min-width:0}.ud-name{color:var(--foreground);font-size:.85rem;font-weight:600}.ud-username{color:var(--muted-foreground);margin-top:1px;font-size:.72rem}.ud-status-pill{text-transform:capitalize;border:1px solid;border-radius:5px;flex-shrink:0;padding:2px 8px;font-size:.62rem;font-weight:600}.ud-status-pill.online{color:#16a34a;background:#dcfce7;border-color:#86efac}.ud-status-pill.offline{color:#525252;background:#f5f5f5;border-color:#d4d4d4}.ud-sep{background:#f0f0f0;height:1px;margin:2px 0}.ud-item{cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:8px;justify-content:space-between;align-items:center;padding:8px 10px;transition:background 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iconify-icon{color:var(--muted-foreground);font-size:1.1rem}.ud-bottom{margin-top:4px}.ud-item.ud-danger .ud-item-left,.ud-item.ud-danger .ud-item-label{color:#e54b4f}.ud-item.ud-danger:hover{background:#fef2f2}.app{flex:1;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-w);background:var(--surface);border-left:1px solid var(--border);flex-direction:column;flex-shrink:0;transition:width .22s cubic-bezier(.4,0,.2,1);display:flex;position:relative;overflow:hidden}.sidebar.collapsed{width:52px}.sidebar-header{border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;height:52px;padding:0 10px 0 14px;display:flex}.sidebar-header-title{color:var(--muted-foreground);letter-spacing:.07em;text-transform:uppercase;white-space:nowrap;opacity:1;align-items:center;gap:7px;font-size:.78rem;font-weight:700;transition:opacity .15s;display:flex;overflow:hidden}.sidebar.collapsed 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.nav-group-body{display:block}.family-sep{letter-spacing:.08em;text-transform:uppercase;color:#c4b5f4;padding:8px 2px 4px;font-size:.62rem;font-weight:700}.family-sep:first-child{padding-top:0}.family-sep-toggle{cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--muted-foreground);letter-spacing:.04em;text-transform:none;border-radius:6px;align-items:center;gap:4px;padding:6px 8px 4px;font-size:.65rem;font-weight:600;transition:color .13s;display:inline-flex}.family-sep-toggle:hover{color:var(--purple)}.family-chevron{transition:transform .18s}.family-sep-toggle.open .family-chevron{transform:rotate(180deg)}.instr-list{flex-direction:column;gap:1px;display:flex}.instr-item{color:var(--text);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:8px;align-items:center;gap:9px;padding:6px 8px;font-size:.76rem;font-weight:500;transition:background 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.fcount{display:none}.filter-more-btn{color:var(--purple);cursor:pointer;font-size:.72rem;font-weight:600;font-family:var(--font-sans);background:0 0;border:none;align-items:center;gap:4px;padding:5px 8px;transition:opacity .13s;display:flex}.filter-more-btn:hover{opacity:.75}.filter-more-btn svg{transition:transform .18s}.filter-more-btn.expanded svg{transform:rotate(180deg)}.filter-extra{display:none}.filter-extra.open{display:block}.load-more-btn{border:1px dashed var(--border);width:100%;color:var(--purple);cursor:pointer;font-size:.74rem;font-weight:600;font-family:var(--font-sans);background:0 0;border-radius:9px;justify-content:center;align-items:center;gap:5px;margin-top:4px;padding:10px;transition:all .15s;display:flex}.load-more-btn:hover{background:var(--purple-lt);border-color:var(--purple-bd)}.sidebar-bottom{scrollbar-width:thin;scrollbar-color:#6b6b8a47 transparent;flex:1;min-height:114px;overflow-y:auto}.sidebar.collapsed .sidebar-bottom{display:none}.sidebar-bottom::-webkit-scrollbar{width:5px}.sidebar-bottom::-webkit-scrollbar-track{background:0 0}.sidebar-bottom::-webkit-scrollbar-thumb{background:#6b6b8a47;border-radius:10px}.sidebar-bottom::-webkit-scrollbar-thumb:hover{background:#6b6b8a80}.sidebar-rail{flex-direction:column;flex:1;align-items:center;gap:4px;padding:8px 0;display:none;overflow:hidden}.sidebar.collapsed .sidebar-rail{display:none}.rail-icon{cursor:pointer;border:1px solid #0000;border-radius:9px;justify-content:center;align-items:center;width:36px;height:36px;font-size:1rem;transition:background .13s;display:flex}.rail-icon:hover{background:var(--surface2)}.rail-icon.active{background:var(--purple-lt);border-color:var(--purple-bd)}.grid-header{background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;padding:14px 24px;display:flex}.grid-heading{letter-spacing:.01em;font-size:1.25rem;font-weight:400;font-family:var(--font-serif)}.grid-sub{color:var(--muted-foreground);margin-top:2px;font-size:.72rem}.filter-chips-bar{background:var(--surface);border-bottom:1px solid var(--border);flex-wrap:wrap;flex-shrink:0;align-items:center;gap:6px;padding:8px 22px;display:flex}.filter-chips-bar:empty{display:none}.filter-chip{background:var(--accent);color:var(--accent-foreground);border:1px solid var(--purple-bd);border-radius:20px;align-items:center;gap:5px;padding:4px 10px;font-size:.72rem;font-weight:600;display:inline-flex}.filter-chip-remove{cursor:pointer;color:var(--accent-foreground);opacity:.6;font-size:.9rem;line-height:1;font-family:var(--font-sans);background:0 0;border:none;padding:0}.filter-chip-remove:hover{opacity:1}.sort-row{align-items:center;gap:8px;display:flex}.sort-select{appearance:none;border:1px solid var(--border);font-size:.75rem;font-family:var(--font-sans);color:var(--text);background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%236b6b8a' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat left 8px center;cursor:pointer;border-radius:8px;outline:none;padding:5px 28px 5px 10px}.piece-grid{scrollbar-width:thin;scrollbar-color:#6b6b8a33 transparent;flex:1;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));align-content:start;gap:14px;padding:20px 22px;display:grid;overflow-y:auto}.piece-card{color:var(--text);border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);cursor:pointer;flex-direction:column;text-decoration:none;transition:box-shadow .18s,transform .18s,border-color .18s;display:flex;overflow:hidden}.piece-card:hover{border-color:var(--purple-bd);transform:translateY(-2px);box-shadow:0 6px 20px #7c3aed21}.card-thumb{aspect-ratio:4/3;border-bottom:1px solid var(--border);background:#fff;flex-shrink:0;width:100%;position:relative;overflow:hidden}.card-thumb svg{width:100%;height:100%;display:block;position:absolute;top:0;left:0}.card-body{padding:10px 12px 12px}.card-title{color:var(--text);white-space:nowrap;text-overflow:ellipsis;margin-bottom:3px;font-size:.76rem;font-weight:700;overflow:hidden}.card-composer{color:var(--muted-foreground);white-space:nowrap;text-overflow:ellipsis;margin-bottom:2px;font-size:.67rem;overflow:hidden}.card-instr{color:var(--muted-foreground);margin-bottom:8px;font-size:.63rem}.card-price{color:var(--purple);font-size:.78rem;font-weight:800}.version-bar{background:var(--surface2);border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:5px;padding:8px 14px;display:flex;overflow:visible}.ver-btn{border:1px solid var(--border);background:var(--surface);color:var(--muted-foreground);cursor:pointer;font-size:.76rem;font-weight:600;font-family:var(--font-sans);white-space:nowrap;border-radius:8px;flex-shrink:0;align-items:center;gap:6px;padding:6px 13px;transition:all .15s;display:flex}.ver-btn:hover{border-color:var(--purple);color:var(--purple)}.ver-btn.active{background:var(--purple-lt);color:var(--purple);border-color:var(--purple-bd);font-weight:700}.ver-sep{background:var(--border);flex-shrink:0;width:1px;height:20px;margin:0 3px}.key-picker{flex-shrink:0;position:relative}.key-picker-btn{border:1px solid var(--border);background:var(--surface);color:var(--muted-foreground);cursor:pointer;font-size:.76rem;font-weight:600;font-family:var(--font-sans);white-space:nowrap;direction:ltr;border-radius:8px;align-items:center;gap:6px;padding:6px 13px;transition:all .15s;display:flex}.key-picker-btn:hover{border-color:var(--purple);color:var(--purple)}.key-picker-btn.has-key{color:var(--purple);border-color:var(--purple-bd);background:var(--purple-lt);font-weight:700}.key-picker-btn .chevron{transition:transform .18s}.key-picker-btn.open .chevron{transform:rotate(180deg)}.key-dropdown{background:var(--surface);border:1px solid var(--border);z-index:300;border-radius:12px;min-width:200px;padding:10px;display:none;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 8px 28px #0000001a}.key-dropdown.open{display:block}.key-dropdown-label{letter-spacing:.1em;text-transform:uppercase;color:#c4b5f4;margin-bottom:8px;font-size:.6rem;font-weight:700;display:block}.key-grid-pop{grid-template-columns:repeat(3,1fr);gap:5px;display:grid}.key-pop-btn{border:1px solid var(--border);color:var(--muted-foreground);cursor:pointer;font-size:.64rem;font-weight:700;font-family:var(--font-sans);text-align:center;white-space:nowrap;direction:ltr;background:0 0;border-radius:7px;padding:8px 4px;transition:all .13s}.key-pop-btn:hover{border-color:var(--purple);color:var(--purple);background:var(--purple-lt)}.key-pop-btn.active{background:var(--purple);color:#fff;border-color:var(--purple)}.main{background:var(--bg);flex-direction:column;flex:1;display:flex;overflow:hidden}.main-header{background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;padding:12px 22px;display:flex}.header-info{flex-direction:column;gap:3px;display:flex}.piece-title{font-size:1.35rem;font-weight:400;font-family:var(--font-serif);color:var(--text);letter-spacing:.01em}.piece-sub{color:var(--muted-foreground);align-items:center;gap:7px;font-size:.76rem;display:flex}.dot{background:var(--muted);border-radius:50%;width:3px;height:3px}.header-actions{align-items:center;gap:7px;display:flex}.tag{letter-spacing:.04em;border-radius:20px;padding:3px 9px;font-size:.62rem;font-weight:700;display:inline-block}.tag-purple{background:var(--purple-lt);color:var(--purple);border:1px solid var(--purple-bd)}.tag-gray{color:var(--muted);background:#6b6b8a14;border:1px solid #6b6b8a24}.btn-ghost{color:var(--muted-foreground);border:1px solid var(--border);cursor:pointer;font-size:.8rem;font-weight:600;font-family:var(--font-sans);background:0 0;border-radius:8px;padding:7px 14px;transition:all .15s}.btn-ghost:hover{border-color:var(--purple);color:var(--purple)}.btn-buy{background:var(--grad);color:#fff;cursor:pointer;font-size:.83rem;font-weight:700;font-family:var(--font-sans);border:none;border-radius:8px;align-items:center;gap:8px;padding:8px 18px;transition:opacity .18s,transform .18s;display:flex;box-shadow:0 3px 14px #7c3aed47}.btn-buy:hover{opacity:.9;transform:translateY(-1px)}.btn-price{opacity:.85;background:#ffffff2e;border-radius:20px;padding:2px 7px;font-size:.7rem;font-weight:500}.sheet-viewer{border:1px solid var(--border);scrollbar-width:thin;scrollbar-color:var(--border) transparent;background:#fff;border-bottom:none;border-radius:14px 14px 0 0;flex:1;margin:10px 10px 0;padding:24px 32px;position:relative;overflow-y:auto}#osmd-container{direction:ltr;max-width:820px;margin:0 auto}.loading-sheet{height:360px;color:var(--muted-foreground);flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:.83rem;display:flex}.spinner{border:2px solid var(--border);border-top-color:var(--purple);border-radius:50%;width:26px;height:26px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.preview-overlay{background:linear-gradient(#0000,#fffffffa 55%);flex-direction:column;justify-content:flex-end;align-items:center;gap:10px;height:200px;padding-bottom:28px;display:flex;position:absolute;bottom:0;left:0;right:0}.overlay-msg{color:var(--muted);font-size:.83rem;font-weight:500}.overlay-btn{background:var(--grad);color:#fff;cursor:pointer;font-size:.86rem;font-weight:700;font-family:var(--font-sans);border:none;border-radius:9px;padding:10px 24px;box-shadow:0 4px 18px #7c3aed4d}.viewer-toolbar{background:var(--surface2);border:1px solid var(--border);border-top:none;border-radius:0 0 14px 14px;flex-shrink:0;align-items:center;gap:5px;margin:0 10px 10px;padding:7px 22px;display:flex}.tb-btn{border:1px solid var(--border);background:var(--surface);color:var(--muted-foreground);cursor:pointer;font-size:.7rem;font-weight:500;font-family:var(--font-sans);border-radius:7px;align-items:center;gap:5px;padding:5px 10px;transition:all .13s;display:flex}.tb-btn:hover{border-color:var(--purple);color:var(--purple)}.tb-sep{background:var(--border);width:1px;height:16px;margin:0 2px}.zoom-lbl{color:var(--muted);text-align:center;min-width:34px;font-size:.68rem}