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8px;border-right:none}.tabs-container{display:flex;gap:4px;padding:16px 20px 0;border-bottom:1px solid var(--border-color,#2a2a3a);overflow-x:auto;white-space:nowrap;scrollbar-width:none}.tabs-container::-webkit-scrollbar{display:none}.tab-btn{display:flex;align-items:center;gap:8px;padding:10px 20px;background:none;border:none;color:var(--text-secondary,#aaa);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;border-radius:8px 8px 0 0}.tab-btn span{font-size:18px}.tab-btn:hover:not(:disabled){color:var(--text-primary,#fff);background:var(--bg-hover,#151522)}.tab-btn.active{color:var(--primary-color,#ffc107);border-bottom:2px solid var(--primary-color,#ffc107)}.tab-btn:disabled{opacity:.5;cursor:not-allowed}.workspace-content{flex:1;overflow-y:auto;padding:20px}.record-tab{max-width:1400px;width:100%;margin:0 auto}.recording-section h2{font-size:28px;font-weight:700;margin-bottom:12px;background:linear-gradient(135deg,var(--primary-color,#ffc107),#50c878);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.recording-subtitle{font-size:16px;color:var(--text-secondary,#aaa);margin-bottom:40px}.example-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-bottom:40px}.example-card{background:var(--bg-secondary,#151522);border:1px solid var(--border-color,#2a2a3a);border-radius:16px;padding:20px;text-align:center;transition:transform .2s}.example-card:hover{transform:translateY(-4px);border-color:var(--primary-color,#ffc107)}.example-icon{font-size:48px;margin-bottom:12px}.example-card h4{font-size:18px;margin-bottom:8px;color:var(--text-primary,#fff)}.example-card p{font-size:13px;color:var(--text-secondary,#aaa);margin-bottom:16px}.example-btn{padding:6px 12px;background:var(--bg-tertiary,#2a2a3a);border:1px solid var(--border-color,#374151);border-radius:6px;color:var(--text-primary,#fff);font-size:12px;cursor:pointer}.example-btn:hover{background:linear-gradient(135deg,#ffd43d,#ffc107 50%,#b38600)}.import-section{margin-top:40px;padding-top:20px}.import-divider{display:flex;align-items:center;text-align:center;margin-bottom:24px}.import-divider:after,.import-divider:before{content:"";flex:1;border-bottom:1px solid var(--border-color,#2a2a3a)}.import-divider span{padding:0 16px;color:var(--text-secondary,#aaa);font-size:12px;font-weight:600;letter-spacing:1px}.import-actions{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.import-btn{display:flex;align-items:center;gap:16px;padding:16px 24px;background:var(--bg-tertiary,#2a2a3a);border:1px solid var(--border-color,#374151);border-radius:16px;color:var(--text-primary,#fff);cursor:pointer;transition:all .2s;min-width:250px;text-align:left}.import-btn:hover{background:var(--bg-hover,#3a3a3a);border-color:var(--primary-color,#ffc107);transform:translateY(-2px)}.import-btn.secondary:hover{border-color:#50c878}.import-btn-text{display:flex;flex-direction:column;gap:4px}.import-btn-text span{font-size:15px;font-weight:600}.import-btn-text small{font-size:12px;color:var(--text-secondary,#aaa)}.recording-preview{margin-top:30px;padding:20px;background:var(--bg-secondary,#151522);border-radius:12px}.recording-preview h4{margin-bottom:12px;color:var(--text-primary,#fff)}.playback-panel{background:var(--bg-secondary,#151522);border-left:1px solid var(--border-color,#2a2a3a);padding:20px;overflow-y:auto;overflow-x:hidden;transition:padding .3s ease,opacity .2s ease}.instruments-sidebar.closed,.playback-panel.closed{padding:0;opacity:0;pointer-events:none}.info-section,.playback-section,.volume-section{margin-bottom:32px}.info-section h3,.playback-section h3,.volume-section h3{font-size:16px;font-weight:600;margin-bottom:16px;color:var(--text-primary,#fff)}.transport-controls{display:flex;gap:12px;margin-bottom:20px}.transport-btn{flex:1;padding:12px;background:var(--bg-tertiary,#2a2a3a);border:1px solid var(--border-color,#374151);border-radius:8px;color:var(--text-primary,#fff);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.transport-btn:hover:not(:disabled){background:linear-gradient(135deg,#ffd43d,#ffc107 50%,#b38600);transform:translateY(-1px)}.transport-btn.playing{background:#e74c3c;animation:pulse 1s infinite}.transport-btn:disabled{opacity:.5;cursor:not-allowed}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.waveform-preview{margin-top:16px}.volume-controls{display:flex;flex-direction:column;gap:16px}.volume-channel{display:grid;grid-template-columns:80px 1fr 50px;align-items:center;gap:12px}.volume-channel label{font-size:13px;color:var(--text-secondary,#aaa)}.volume-channel input{width:100%;height:4px;-webkit-appearance:none;background:var(--border-color,#374151);border-radius:2px;outline:none}.volume-channel input::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;background:linear-gradient(135deg,#ffd43d,#ffc107 50%,#b38600);border-radius:50%;cursor:pointer}.volume-channel span{font-size:12px;color:var(--text-primary,#fff);text-align:right}.volume-channel.master{margin-top:8px;padding-top:8px;border-top:1px solid var(--border-color,#2a2a3a)}.volume-channel.master label{font-weight:600;color:var(--primary-color,#ffc107)}.info-stats{display:flex;flex-direction:column;gap:12px}.stat{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border-color,#2a2a3a)}.stat-label{font-size:13px;color:var(--text-secondary,#aaa)}.stat-value{font-size:14px;font-weight:600;color:var(--text-primary,#fff)}.processing-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.9);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000}.processing-card{background:var(--bg-secondary,#151522);border-radius:24px;padding:48px;text-align:center;min-width:400px;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.spinner{width:60px;height:60px;border:4px solid var(--border-color,#374151);border-top-color:var(--primary-color,#ffc107);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 24px}@keyframes spin{to{transform:rotate(1turn)}}.processing-card h3{font-size:24px;margin-bottom:12px;color:var(--text-primary,#fff)}.processing-card p{color:var(--text-secondary,#aaa);margin-bottom:24px}.processing-progress{display:flex;align-items:center;gap:12px}.progress-bar{flex:1;height:6px;background:var(--border-color,#374151);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-color,#ffc107),#50c878);transition:width .3s ease}.progress-text{font-size:14px;font-weight:600;color:var(--primary-color,#ffc107)}@media (max-width:1200px){.beat-main-grid{grid-template-columns:260px 1fr 280px}}@media (max-width:992px){.beat-main-grid{grid-template-columns:1fr!important}.instruments-sidebar,.playback-panel,.toggle-panel-btn{display:none}.workspace-area{min-height:calc(100vh - 73px)}}@media (max-width:768px){.beat-header{flex-direction:column;align-items:flex-start;gap:16px;padding:16px}.header-left{width:100%}.project-name-input{max-width:100%}.header-right{width:100%;justify-content:flex-start}.example-grid{grid-template-columns:1fr}.processing-card{min-width:90%;padding:32px}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary,#151522)}::-webkit-scrollbar-thumb{background:var(--border-color,#374151);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:linear-gradient(135deg,#ffd43d,#ffc107 50%,#b38600)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;min-height:400px;text-align:center;background:var(--bg-secondary,#151522);border-radius:16px;border:1px dashed var(--border-color,#2a2a3a);padding:40px}.empty-icon{color:var(--border-color,#374151);margin-bottom:16px}.empty-state h3{font-size:20px;color:var(--text-primary,#fff);margin-bottom:8px}.empty-state p{font-size:14px;color:var(--text-secondary,#aaa);max-width:300px}