:root{--gold: #D4AF37;--gold-light: #F4E4A6;--gold-dark: #8B7024;--void-darkest: #0a0e27;--void-dark: #16213e;--void-mid: #1f3a5f;--void-light: #2a4a7c;--text-primary: #FFFFFF;--text-secondary: #B0B8C1;--border: rgba(212, 175, 55, .2);--error: #FF6B6B;--success: #51CF66;--warning: #FFD43B}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--void-darkest);color:var(--text-primary);line-height:1.5;overflow:hidden}#arc-daw-app{width:100vw;height:100vh;display:flex;flex-direction:column;background:var(--void-darkest)}.arc-daw-transport{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:12px 16px;background:var(--void-dark);border-bottom:1px solid var(--border);flex-wrap:wrap}.arc-transport-controls{display:flex;align-items:center;gap:10px;flex:1;min-width:0}.arc-transport-right{display:flex;gap:10px}.backend-setup-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#0a0e27f2;display:flex;align-items:center;justify-content:center;z-index:9999;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.backend-setup-modal{background:var(--void-dark);border:2px solid var(--gold);border-radius:16px;padding:40px;max-width:600px;box-shadow:0 8px 40px #d4af374d;text-align:center}.backend-setup-modal h2{color:var(--gold);font-size:32px;margin-bottom:16px;font-weight:700}.backend-setup-modal p{color:var(--text-secondary);font-size:16px;margin-bottom:24px;line-height:1.6}.setup-info{background:var(--void-darkest);border:1px solid var(--border);border-radius:8px;padding:20px;margin:24px 0;text-align:left}.setup-info h3{color:var(--gold);font-size:18px;margin-bottom:12px}.setup-info ul{list-style:none;padding:0}.setup-info li{color:var(--text-primary);font-size:15px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.05)}.setup-info li:last-child{border-bottom:none}.setup-actions{display:flex;gap:16px;justify-content:center;margin:24px 0}.setup-button{padding:14px 28px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease;border:none;text-decoration:none;display:inline-block}.setup-button.primary{background:var(--gold);color:var(--void-darkest)}.setup-button.primary:hover{background:var(--gold-light);transform:translateY(-2px);box-shadow:0 4px 12px #d4af3766}.setup-button.secondary{background:transparent;color:var(--gold);border:1px solid var(--gold)}.setup-button.secondary:hover{background:#d4af371a;transform:translateY(-2px)}.setup-note{color:var(--text-secondary);font-size:13px;margin-top:16px;line-height:1.5}.arc-mix-chat-panel{position:fixed;bottom:28px;left:10px;width:420px;max-height:380px;background:var(--void-dark);border:1px solid var(--gold);border-radius:12px;display:flex;flex-direction:column;box-shadow:0 4px 20px #00000080;z-index:100;transition:max-height .3s ease}.arc-mix-chat-panel.minimized{max-height:44px;overflow:hidden}.arc-mix-chat-header{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:var(--void-mid);border-bottom:1px solid var(--border);border-radius:12px 12px 0 0;-webkit-user-select:none;user-select:none}.arc-panel-actions{display:flex;gap:6px}.arc-mix-chat-title{font-weight:600;color:var(--gold-light);font-size:13px}.arc-btn-icon{background:none;border:none;cursor:pointer;font-size:16px;padding:4px;opacity:.7;transition:opacity .2s}.arc-btn-icon:hover{opacity:1}.arc-mix-chat-messages{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px;min-height:200px;max-height:260px}.arc-chat-message{padding:8px 12px;border-radius:8px;font-size:13px;line-height:1.4;max-width:90%;word-wrap:break-word}.arc-chat-message.user{align-self:flex-end;background:var(--gold-dark);color:var(--text-primary)}.arc-chat-message.assistant{align-self:flex-start;background:var(--void-mid);color:var(--text-secondary);border:1px solid var(--border)}.arc-chat-message.system{align-self:center;background:var(--void-light);color:var(--warning);font-size:12px;font-style:italic}.arc-mix-chat-input-row{display:flex;gap:8px;padding:10px;border-top:1px solid var(--border);background:var(--void-darkest);border-radius:0 0 12px 12px}.arc-mix-chat-input{flex:1;resize:none;padding:8px 10px;border-radius:8px;background:var(--void-mid);color:var(--text-primary);border:1px solid var(--border);outline:none;font-size:13px;font-family:inherit}.arc-mix-chat-input:focus{border-color:var(--gold)}.arc-mix-control-panel{position:fixed;bottom:28px;right:10px;width:460px;max-width:calc(100vw - 20px);max-height:380px;background:var(--void-dark);border:1px solid var(--gold);border-radius:12px;display:flex;flex-direction:column;box-shadow:0 4px 20px #00000080;z-index:100;transition:max-height .3s ease}.arc-mix-control-panel.minimized{max-height:44px;overflow:hidden}.arc-mix-control-header{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:var(--void-mid);border-bottom:1px solid var(--border);border-radius:12px 12px 0 0;-webkit-user-select:none;user-select:none}.arc-mix-control-preferences{padding:8px 12px;border-bottom:1px solid var(--border);display:flex;gap:10px;align-items:center}.arc-pref-item{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-secondary)}.arc-pref-item input[type=checkbox]{accent-color:var(--gold)}.arc-onboarding{margin:10px 12px 0;padding:12px;border-radius:10px;background:#0a0e27b3;border:1px solid var(--border)}.arc-onboarding-title{font-size:12px;font-weight:700;color:var(--gold-light);margin-bottom:6px}.arc-onboarding-steps{margin-left:18px;color:var(--text-secondary);font-size:12px;line-height:1.5;margin-bottom:10px}.arc-onboarding-steps strong{color:var(--text-primary)}@media (max-width: 900px){body{overflow:hidden}.arc-mix-chat-panel,.arc-mix-control-panel{width:auto;left:10px;right:10px;max-height:none}.arc-mix-chat-panel{bottom:10px;height:42vh}.arc-mix-control-panel{bottom:calc(20px + 42vh);height:42vh}.arc-mix-chat-panel.minimized,.arc-mix-control-panel.minimized{height:auto}.arc-mix-output{max-height:none}}.arc-mix-control-title{font-weight:600;color:var(--gold-light);font-size:13px}.arc-mix-control-buttons{display:flex;gap:8px;padding:10px 12px;border-bottom:1px solid var(--border);flex-wrap:wrap}.arc-mix-control-buttons .arc-btn{flex:1 1 140px}.arc-mix-assistant-status{font-size:12px;color:var(--text-secondary);padding:8px 12px;min-height:24px}.arc-mix-assistant-status.status-success{color:var(--success)}.arc-mix-assistant-status.status-error{color:var(--error)}.arc-mix-output{max-height:220px;overflow-y:auto;overflow-x:hidden;padding:10px 12px;margin:0 12px 12px;border-radius:8px;background:var(--void-darkest);border:1px solid var(--border);font-size:12px;color:var(--text-secondary);white-space:pre-wrap;word-wrap:break-word;line-height:1.4}.arc-seeker{flex:1;min-width:100px;height:6px;border-radius:3px;background:var(--void-mid);border:1px solid var(--border);outline:none;cursor:pointer;-moz-appearance:none;appearance:none;-webkit-appearance:none}.arc-seeker::-webkit-slider-thumb{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--gold);cursor:pointer;box-shadow:0 2px 8px #d4af374d;transition:box-shadow .2s}.arc-seeker::-webkit-slider-thumb:hover{box-shadow:0 2px 12px #d4af3780}.arc-seeker::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--gold);cursor:pointer;border:none;box-shadow:0 2px 8px #d4af374d;transition:box-shadow .2s}.arc-time{font-family:Courier New,monospace;font-size:13px;color:var(--text-secondary);min-width:45px;text-align:right}.arc-ai-status{font-size:12px;font-weight:600;padding:6px 12px;border-radius:6px;background:var(--void-mid);border:1px solid var(--border);cursor:help;white-space:nowrap}.arc-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0e27d9;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:9999}.arc-overlay-content{background:#10152f;border:1px solid rgba(212,175,55,.4);border-radius:12px;padding:20px 28px;display:flex;align-items:center;gap:16px;box-shadow:0 10px 40px #00000073}.arc-overlay-text{color:var(--text-primary);font-weight:600}.arc-spinner{width:28px;height:28px;border:3px solid rgba(212,175,55,.25);border-top-color:var(--accent-gold);border-radius:50%;animation:arc-spin .9s linear infinite}@keyframes arc-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.arc-btn{padding:8px 14px;border:none;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:6px;white-space:nowrap;-webkit-user-select:none;user-select:none}.arc-btn:hover{transform:translateY(-1px)}.arc-btn:active{transform:translateY(0)}.arc-btn-primary{background:linear-gradient(135deg,var(--gold) 0%,var(--gold-dark) 100%);color:var(--void-darkest);font-weight:600}.arc-btn-primary:hover{box-shadow:0 4px 12px #d4af3766}.arc-btn-secondary{background:var(--void-mid);color:var(--text-primary);border:1px solid var(--border)}.arc-btn-secondary:hover{background:var(--void-light);border-color:var(--gold)}.arc-btn-success{background:var(--success);color:#000;font-weight:600}.arc-btn-success:hover{box-shadow:0 4px 12px #51cf664d}.arc-btn-ai{background:linear-gradient(135deg,#8b7fd8,#5e4fa3);color:#fff;font-weight:600}.arc-btn-ai:hover{box-shadow:0 4px 12px #8b7fd866}.arc-btn-ai:disabled{opacity:.5;cursor:not-allowed}.arc-btn-small{padding:6px 10px;font-size:12px}.arc-daw-main{display:flex;flex-direction:column;flex:1;min-height:0}.arc-daw-workspace{display:grid;grid-template-columns:280px 1fr 320px;gap:0;flex:1;min-height:0;border-bottom:1px solid var(--border)}.arc-daw-track-list-panel{display:flex;flex-direction:column;background:var(--void-dark);border-right:1px solid var(--border);min-height:0}.arc-daw-track-list-panel>h3{padding:12px 16px;font-size:13px;font-weight:600;color:var(--gold);border-bottom:1px solid 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#d4af3726}.arc-track-header{display:flex;flex-direction:column;gap:4px}.arc-track-name{font-size:12px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.arc-track-instrument{font-size:11px;color:var(--text-secondary)}.arc-waveform{display:block;width:100%;height:50px;border-radius:3px}.arc-daw-timeline-container{display:flex;flex-direction:column;background:var(--void-darkest);overflow:hidden}.arc-daw-timeline{flex:1;display:block;width:100%;cursor:crosshair}.arc-daw-inspector{display:flex;flex-direction:column;background:var(--void-dark);border-left:1px solid var(--border);overflow-y:auto;padding:0}.arc-inspector-header{padding:16px;border-bottom:1px solid var(--border);border-left:4px solid var(--gold)}.arc-inspector-header h3{font-size:14px;margin-bottom:4px}.arc-inspector-header p{font-size:12px}.arc-inspector-section{padding:16px;border-bottom:1px solid var(--border)}.arc-inspector-section:last-child{border-bottom:none}.arc-inspector-section h4{font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--gold);margin-bottom:12px;font-weight:600}.arc-inspector-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;font-size:12px}.arc-inspector-grid>div{color:var(--text-secondary)}.arc-inspector-grid strong{color:var(--text-primary)}.arc-inspector-control{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}.arc-inspector-control label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.3px;color:var(--text-secondary)}.arc-inspector-control span{font-size:12px;color:var(--gold);font-family:Courier New,monospace}.arc-inspector-fader{width:100%;height:5px;border-radius:2px;background:var(--void-mid);border:1px solid 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transparent;border-top:3px solid var(--gold);border-radius:4px;min-width:120px;cursor:pointer;transition:all .2s}.arc-mixer-channel:hover{background:var(--void-light);border-color:var(--border)}.arc-mixer-channel.selected{background:var(--void-light);box-shadow:0 0 12px #d4af3733}.arc-channel-header{display:flex;flex-direction:column;gap:4px;padding-bottom:8px;border-bottom:1px solid var(--border)}.arc-channel-name{font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.arc-channel-group{font-size:10px}.arc-channel-fader-group,.arc-channel-pan-group{display:flex;flex-direction:column;gap:4px}.arc-channel-fader-group label,.arc-channel-pan-group label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.2px;color:var(--text-secondary)}.arc-channel-fader-group input,.arc-channel-pan-group input{width:100%;height:4px;border-radius:2px;background:var(--void-dark);border:1px solid 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top,var(--gold),var(--gold-light));border-radius:2px;min-height:2px;transition:height .05s linear}.arc-meter-peak{flex:1;background:var(--error);border-radius:2px;min-height:1px;transition:height .05s linear}.arc-daw-status{padding:10px 16px;background:var(--void-dark);border-top:1px solid var(--border);font-size:13px;color:var(--text-secondary);transition:all .3s}.arc-daw-status.status-success{background:#51cf661a;color:var(--success);border-top-color:var(--success)}.arc-daw-status.status-error{background:#ff6b6b1a;color:var(--error);border-top-color:var(--error)}.arc-daw-status.status-info{background:#d4af371a;color:var(--gold);border-top-color:var(--gold)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--void-mid)}::-webkit-scrollbar-thumb{background:var(--gold);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--gold-light)}@media (max-width: 1200px){.arc-daw-workspace{grid-template-columns:1fr}.arc-daw-track-list-panel,.arc-daw-inspector{display:none}}@media (max-width: 768px){.arc-daw-mixer{max-height:200px}.arc-transport-controls{gap:6px}.arc-btn{padding:6px 10px;font-size:11px}}