:root{color-scheme:light;--background: #ffffff;--surface: #f8f9fa;--surface-strong: #f1f3f5;--text-primary: #1a1a1a;--text-secondary: #6b7280;--border: #e5e7eb;--shadow-soft: 0 14px 40px rgba(15, 23, 42, .06);--shadow-hover: 0 18px 48px rgba(15, 23, 42, .1);--radius-lg: 24px;--radius-md: 18px;--radius-sm: 12px;--content-width: 1280px}*{box-sizing:border-box}body{margin:0;font-family:DM Sans,Noto Sans TC,sans-serif;background:linear-gradient(180deg,#fff,#fcfcfd);color:var(--text-primary)}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}#root{min-height:100vh}.page-shell{width:min(calc(100% - 64px),var(--content-width));margin:0 auto;padding:32px 0 64px}.page-header{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:32px}.headline{margin:0 0 10px;font-size:40px;line-height:1.08;letter-spacing:-.04em}.subtle{margin:0;max-width:700px;color:var(--text-secondary);line-height:1.7}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card,.panel{background:#f8f9fad6;border:1px solid rgba(229,231,235,.9);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.card{padding:24px;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);background:#fff}.panel{padding:24px}.section-stack{display:grid;gap:24px}.toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.button{border:0;border-radius:999px;background:var(--text-primary);color:#fff;padding:12px 18px;min-height:44px;transition:opacity .16s ease,transform .16s ease}.button:hover{opacity:.92;transform:translateY(-1px)}.button.secondary{background:#fff;color:var(--text-primary);border:1px solid var(--border)}.button.ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.input,.textarea,.select{width:100%;border-radius:var(--radius-sm);border:1px solid var(--border);background:#fff;color:var(--text-primary);padding:14px 16px}.textarea{min-height:280px;resize:vertical;line-height:1.8}.meta-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;color:var(--text-secondary);font-size:14px}.list{display:grid;gap:16px}.badge{display:inline-flex;align-items:center;border-radius:999px;padding:6px 12px;background:#fff;border:1px solid var(--border);color:var(--text-secondary);font-size:13px}.split-layout{display:grid;grid-template-columns:380px minmax(0,1fr);gap:24px}.compact-table{width:100%;border-collapse:collapse;table-layout:fixed;background:#fff;border:1px solid var(--border);border-radius:18px;overflow:hidden}.compact-table th,.compact-table td{padding:14px 16px;border-bottom:1px solid var(--border);border-right:1px solid var(--border);vertical-align:top;text-align:left}.compact-table th:last-child,.compact-table td:last-child{border-right:0}.compact-table tr:last-child td{border-bottom:0}.compact-table th{font-size:13px;color:var(--text-secondary);font-weight:500;background:var(--surface)}.line-clamp-2,.line-clamp-3{display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}.line-clamp-2{-webkit-line-clamp:2}.line-clamp-3{-webkit-line-clamp:3}.icon-toggle{width:42px;height:42px;border-radius:999px;border:1px solid var(--border);background:#fff;color:var(--text-primary)}.workshop-shell{background:#fff;border:1px solid var(--border);border-radius:28px;padding:28px;box-shadow:var(--shadow-soft)}.workshop-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}.workshop-tab{border:1px solid var(--border);background:#fff;color:var(--text-secondary);border-radius:999px;padding:10px 16px}.workshop-tab.active{background:#1a1a1a;color:#fff;border-color:#1a1a1a}.note-chip{border:1px solid var(--border);background:#fff;border-radius:12px;padding:8px 12px;min-width:48px}.note-chip.active{background:#fef2f2;border-color:#f43f5e;color:#be123c}.guitar-workshop{background:#050608;color:#f6f7fb;border-radius:28px;padding:28px;box-shadow:0 24px 60px #0f172a2e}.guitar-workshop .subtle{color:#8b93a7}.guitar-workshop .badge{background:#ffffff0a;border-color:#ffffff14;color:#f43f7a}.guitar-tab{border:0;border-bottom:2px solid transparent;background:transparent;color:#71798f;padding:12px 0}.guitar-tab.active{color:#ff4f87;border-bottom-color:#ff4f87}.guitar-filter{border:1px solid #232936;background:#0d1015;color:#dde4f2;border-radius:10px;padding:10px 14px}.guitar-filter.active{border-color:#ff4f87;background:#ff4f8729;color:#fff}.guitar-toggle{display:inline-flex;align-items:center;gap:8px;color:#cfd5e3}.guitar-grid{position:relative;border-radius:20px;background:linear-gradient(180deg,#ffffff0a,#ffffff03),#0b0e14;border:1px solid #1c2230;padding:18px 20px 22px 38px}.guitar-fretboard{position:relative;height:340px}.guitar-string-line{position:absolute;left:0;right:0;height:1px;background:#e0c18480}.guitar-fret-line{position:absolute;top:0;bottom:0;width:1px;background:#ffffff14}.guitar-fret-line.nut{width:3px;background:#ffffffd1}.guitar-note{position:absolute;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:999px;display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff;border:2px solid currentColor;background:#00000061}.guitar-note.root{background:currentColor;color:#050608;border-color:currentColor}.guitar-legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:14px;color:#98a1b3;font-size:13px}.guitar-legend-chip{display:inline-flex;align-items:center;gap:8px}.guitar-legend-dot{width:10px;height:10px;border-radius:999px}.guitar-card{background:#0d1015;border:1px solid #1d2532;border-radius:18px;padding:18px}.guitar-card h3{margin-top:0}.source-chip-grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px}.source-chip{min-height:44px;border-radius:10px;border:1px solid #bfd5ec;background:#b9d3ec;color:#0f172a;padding:8px 10px;text-align:left;overflow:hidden;font-size:14px}.source-chip.hidden{opacity:.35;background:#dbe8f5}.source-overview{display:grid;gap:10px}.loading-inline{display:inline-flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:14px}.loading-dot{width:8px;height:8px;border-radius:999px;background:currentColor;animation:pulse-dot .9s ease-in-out infinite}@keyframes pulse-dot{0%,to{opacity:.35;transform:scale(.8)}50%{opacity:1;transform:scale(1)}}.empty-state,.error-state{padding:24px;border-radius:var(--radius-md);background:#fff;border:1px dashed var(--border);color:var(--text-secondary)}.error-state{color:#b42318;background:#fef3f2;border-style:solid;border-color:#fecdca}