:root{--bg: #0f172a;--bg-elevated: #1e293b;--fg: #e2e8f0;--fg-muted: #94a3b8;--primary: #38bdf8;--secondary: #a78bfa;--accent: #f472b6;--code-bg: #1e293b;--border: rgba(255, 255, 255, .08);--border-hover: rgba(255, 255, 255, .16);--font-heading: "Inter", system-ui, sans-serif;--font-body: "Inter", system-ui, sans-serif;--font-code: "JetBrains Mono", "Fira Code", monospace;--max-width: 1200px;--radius: 12px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{height:100%;scroll-behavior:smooth}body{min-height:100%;background:var(--bg);color:var(--fg);font-family:var(--font-body);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}code{font-family:var(--font-code);font-size:.9em;background:var(--code-bg);padding:.15em .4em;border-radius:4px}img{max-width:100%;height:auto}.mobile-gate{display:none;position:fixed;inset:0;z-index:9999;background:var(--bg, #0f172a);color:var(--fg, #e2e8f0);font-family:var(--font-body, system-ui, sans-serif);align-items:center;justify-content:center;text-align:center;padding:2rem}.mobile-gate-content{max-width:320px;display:flex;flex-direction:column;align-items:center;gap:1rem}.mobile-gate-icon{width:64px;height:64px;color:var(--primary, #fbbf24);opacity:.8}.mobile-gate-title{font-size:1.4rem;font-weight:700;color:var(--primary, #fbbf24);margin:0}.mobile-gate-desc{font-size:.9rem;line-height:1.5;opacity:.7;margin:0}.mobile-gate-link{display:inline-block;margin-top:.5rem;padding:10px 24px;background:var(--primary, #fbbf24);color:#0f172a;border-radius:8px;font-weight:600;font-size:.9rem;text-decoration:none;transition:opacity .15s}.mobile-gate-link:hover{opacity:.85}@media(max-width:768px){.mobile-gate{display:flex}.playground{display:none!important}}.playground{position:fixed;inset:64px 0 0;display:flex;flex-direction:column;overflow:hidden}.playground-toolbar{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;background:var(--bg-elevated);border-bottom:1px solid var(--border);flex-shrink:0;height:44px;gap:8px}.toolbar-left{display:flex;align-items:center;gap:8px;min-width:0}.toolbar-right{display:flex;align-items:center;gap:8px;flex-shrink:0}.toolbar-project-title{font-size:.85rem;font-weight:600;color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px;cursor:pointer;padding:4px 8px;border-radius:6px;transition:background .15s}.toolbar-project-title:hover{background:#ffffff0f}.toolbar-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:8px;font-size:.8rem;font-weight:500;border:1px solid var(--border);background:transparent;color:var(--fg-muted);cursor:pointer;transition:all .15s;font-family:var(--font-body)}.toolbar-btn:hover{background:#ffffff0f;color:var(--fg);border-color:var(--border-hover)}.toolbar-select{padding:6px 24px 6px 10px;border-radius:8px;font-size:.8rem;border:1px solid var(--border);background:var(--bg);color:var(--fg-muted);cursor:pointer;font-family:var(--font-body);-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2394a3b8'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center}.playground-main{display:flex;flex:1;min-height:0;position:relative;overflow:hidden}.playground-editor{flex:1 1 50%;display:flex;flex-direction:column;min-width:120px}.resize-handle{width:1px;cursor:col-resize;background:var(--border);flex-shrink:0;transition:background .2s,width .15s;position:relative}.resize-handle:hover,.resize-handle--active{width:3px;background:var(--primary)}.resize-handle:before{content:"";position:absolute;inset:0 -6px}.playground-preview{flex:1 1 50%;display:flex;flex-direction:column;min-width:0;overflow:hidden}.preview-aspect-wrapper{flex:1;display:flex;align-items:center;justify-content:center;background:#0b1120;overflow:hidden;position:relative;padding:8px;min-height:0;container-type:size}.preview-frame{height:100cqh;width:calc(100cqh * 16 / 9);max-width:100cqw;max-height:56.25cqw;aspect-ratio:16 / 9;border:none;background:#0f172a;border-radius:4px;box-shadow:0 2px 16px #0000004d}.scene-strip{flex-shrink:0;border-top:1px solid var(--border);background:var(--bg-elevated);overflow-x:auto;overflow-y:hidden;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.15) transparent}.scene-strip::-webkit-scrollbar{height:4px}.scene-strip::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:2px}.scene-strip-list{display:flex;gap:2px;padding:6px 8px;min-width:min-content}.scene-strip-item{display:flex;align-items:center;gap:5px;padding:4px 10px;font-size:.7rem;color:var(--fg-muted);cursor:pointer;border-radius:5px;border:1px solid transparent;white-space:nowrap;transition:background .1s,color .1s,border-color .1s;user-select:none}.scene-strip-item:hover{background:#ffffff0d;color:var(--fg)}.scene-strip-item--active{color:var(--fg);border-color:var(--primary);background:#38bdf814}.scene-strip-num{font-size:.6rem;opacity:.5;flex-shrink:0}.scene-strip-item--active .scene-strip-num{color:var(--primary);opacity:.9}.scene-strip-item[draggable=true]{cursor:grab}.scene-strip-item[draggable=true]:active{cursor:grabbing}.scene-strip-item--drag-over{border-left:2px solid var(--primary)}.scene-strip-item--dragging{opacity:.4}.editor-container{flex:1;overflow:hidden}.editor-container .cm-editor{height:100%}.editor-container .cm-scroller{overflow:auto;font-family:var(--font-code);font-size:14px;line-height:1.6}.playground-status{display:flex;align-items:center;gap:16px;padding:0 16px;background:var(--bg-elevated);border-top:1px solid var(--border);font-size:.72rem;color:var(--fg-muted);flex-shrink:0;height:28px}.status-error{color:#ef4444}.theme-picker{display:flex;align-items:center;gap:8px}.theme-picker-label{font-size:.75rem;color:var(--fg-muted);font-weight:500;white-space:nowrap}.theme-swatches{display:flex;gap:3px;align-items:center}.theme-swatch{width:10px;height:10px;border-radius:50%;border:1px solid rgba(255,255,255,.15)}.export-dropdown{position:relative}.export-menu{display:none;position:absolute;top:100%;right:0;margin-top:4px;min-width:180px;background:var(--bg-elevated);border:1px solid var(--border-hover);border-radius:8px;padding:4px;box-shadow:0 8px 24px #0006;z-index:20}.export-menu--open{display:flex;flex-direction:column}.export-menu-item{padding:8px 12px;border:none;background:none;color:var(--fg-muted);font-size:.8rem;font-family:var(--font-body);text-align:left;border-radius:6px;cursor:pointer;transition:background .1s,color .1s}.export-menu-item:hover{background:#ffffff0f;color:var(--fg)}.toolbar-btn--ai{border-color:#38bdf84d;color:var(--fg-muted)}.toolbar-btn--ai:hover,.toolbar-btn--active{background:#38bdf81a;border-color:#38bdf880;color:var(--fg)}.toolbar-btn--present{background:var(--primary);color:#0f172a;border-color:var(--primary);font-weight:600}.toolbar-btn--present:hover{opacity:.9;background:var(--primary);color:#0f172a}.ai-drawer{position:absolute;top:0;right:0;bottom:0;width:320px;background:var(--bg-elevated);border-left:1px solid var(--border);display:flex;flex-direction:column;transform:translate(100%);transition:transform .2s ease;z-index:10;overflow:hidden}.ai-drawer--open{transform:translate(0)}.ai-drawer-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);flex-shrink:0}.ai-drawer-title{font-family:var(--font-heading);font-weight:600;font-size:.9rem;color:var(--fg)}.ai-drawer-close{background:none;border:none;color:var(--fg-muted);font-size:1.2rem;cursor:pointer;padding:2px 6px;border-radius:4px;line-height:1}.ai-drawer-close:hover{color:var(--fg);background:#ffffff0f}.ai-tabs{display:flex;border-bottom:1px solid var(--border);flex-shrink:0}.ai-tab{flex:1;padding:8px 0;font-size:.8rem;font-weight:500;font-family:var(--font-body);background:none;border:none;border-bottom:2px solid transparent;color:var(--fg-muted);cursor:pointer;transition:color .15s,border-color .15s}.ai-tab:hover{color:var(--fg)}.ai-tab--active{color:var(--fg);border-bottom-color:var(--primary)}.ai-tab-content{padding:16px;display:flex;flex-direction:column;gap:12px;overflow-y:auto;flex:1;min-height:0}.ai-tab-content--hidden{display:none}.ai-textarea{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--fg);font-family:var(--font-body);font-size:.8rem;line-height:1.5;resize:vertical;box-sizing:border-box}.ai-textarea::placeholder{color:var(--fg-muted);opacity:.6}.ai-textarea:focus{outline:none;border-color:var(--primary)}.ai-textarea--small{resize:none}.ai-action-btn{padding:8px 16px;border-radius:8px;font-size:.8rem;font-weight:600;font-family:var(--font-body);border:none;cursor:pointer;transition:background .15s,opacity .15s;background:var(--primary);color:#0f172a}.ai-action-btn:hover{opacity:.9}.ai-action-btn:disabled{opacity:.5;cursor:not-allowed}.ai-action-btn--secondary{background:#38bdf826;color:var(--primary)}.ai-divider{height:1px;background:var(--border);margin:0 16px;flex-shrink:0}.ai-refine-section{padding:16px;display:flex;flex-direction:column;gap:8px;flex-shrink:0}.ai-refine-label{font-size:.75rem;font-weight:600;color:var(--fg-muted);text-transform:uppercase;letter-spacing:.05em}.ai-template-grid{display:flex;flex-direction:column;gap:8px}.ai-template-card{display:flex;flex-direction:column;gap:4px;padding:12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);cursor:pointer;text-align:left;transition:border-color .15s,background .15s}.ai-template-card:hover{border-color:var(--border-hover);background:#ffffff08}.ai-template-name{font-size:.85rem;font-weight:600;color:var(--fg)}.ai-template-desc{font-size:.75rem;color:var(--fg-muted);line-height:1.4}.ai-status{padding:0 16px 12px;font-size:.75rem;min-height:1.5em;flex-shrink:0}.ai-status--success{color:#22c55e}.ai-status--error{color:#ef4444}.ai-status--loading{color:var(--primary)}.ai-mode-badge{font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;padding:2px 8px;border-radius:4px;background:#38bdf826;color:var(--primary);margin-left:auto;margin-right:8px}.ai-mode-badge--byok{background:#4ade8026;color:#4ade80}.ai-usage-bar{font-size:.72rem;color:var(--fg-muted);padding:6px 0}.ai-usage-bar:empty{display:none}.ai-usage-bar--warn{color:#fbbf24}.ai-usage-bar--exhausted{color:#ef4444}.ai-settings-section{display:flex;flex-direction:column;gap:8px}.ai-settings-section+.ai-settings-section{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}.ai-settings-label{font-size:.75rem;font-weight:600;color:var(--fg-muted);text-transform:uppercase;letter-spacing:.05em}.ai-settings-hint{font-size:.72rem;color:var(--fg-muted);line-height:1.5;opacity:.7}.ai-mode-toggle{display:flex;gap:6px}.ai-mode-option{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 8px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--fg-muted);font-size:.8rem;font-weight:600;font-family:var(--font-body);cursor:pointer;transition:all .15s}.ai-mode-option:hover{border-color:var(--border-hover);color:var(--fg)}.ai-mode-option--active{border-color:var(--primary);background:#38bdf814;color:var(--fg)}.ai-mode-desc{font-size:.65rem;font-weight:400;color:var(--fg-muted)}.ai-key-input{width:100%;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--fg);font-family:var(--font-code);font-size:.78rem;box-sizing:border-box}.ai-key-input:focus{outline:none;border-color:var(--primary)}.ai-key-input::placeholder{color:var(--fg-muted);opacity:.5}.ai-key-actions{display:flex;gap:6px}.ai-action-btn--small{padding:6px 12px;font-size:.72rem}.ai-drawer--loading .ai-action-btn{position:relative}.ai-drawer--loading .ai-action-btn:after{content:"";position:absolute;inset:0;border-radius:inherit;background:repeating-linear-gradient(-45deg,transparent,transparent 4px,rgba(255,255,255,.1) 4px,rgba(255,255,255,.1) 8px);animation:ai-loading .5s linear infinite}@keyframes ai-loading{0%{background-position:0 0}to{background-position:11px 0}}.drop-overlay{position:fixed;inset:0;z-index:200;background:#0f172ae6;display:flex;align-items:center;justify-content:center;pointer-events:none}.drop-overlay-content{display:flex;flex-direction:column;align-items:center;gap:16px;padding:48px;border-radius:16px;border:2px dashed var(--primary);color:var(--primary);font-size:1.1rem;font-weight:600;font-family:var(--font-body)}.toolbar-separator{width:1px;height:20px;background:var(--border);flex-shrink:0}.project-overlay{position:fixed;inset:0;z-index:100;background:var(--bg);display:none;flex-direction:column;overflow:hidden}.project-overlay--open{display:flex}.project-overlay-content{max-width:800px;width:100%;margin:0 auto;padding:80px 24px 40px;display:flex;flex-direction:column;gap:24px;flex:1;overflow:hidden}.project-overlay-header{display:flex;align-items:center;justify-content:space-between}.project-overlay-title{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--fg)}.project-overlay-close{background:none;border:none;color:var(--fg-muted);font-size:1.5rem;cursor:pointer;padding:4px 8px;border-radius:6px;line-height:1}.project-overlay-close:hover{color:var(--fg);background:#ffffff0f}.project-actions-bar{display:flex;align-items:center;gap:8px}.project-actions-spacer{flex:1}.project-action-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:8px;font-size:.8rem;font-weight:600;font-family:var(--font-body);border:1px solid var(--border);background:transparent;color:var(--fg-muted);cursor:pointer;transition:all .15s}.project-action-btn:hover{background:#ffffff0f;color:var(--fg);border-color:var(--border-hover)}.project-action-btn--primary{background:var(--primary);color:#0f172a;border-color:var(--primary)}.project-action-btn--primary:hover{opacity:.9;background:var(--primary);color:#0f172a}.project-list{display:flex;flex-direction:column;gap:8px;overflow-y:auto;flex:1;min-height:0}.project-list-empty{text-align:center;padding:48px 16px;color:var(--fg-muted);font-size:.9rem}.welcome-icon{margin-bottom:12px;opacity:.4}.welcome-title{font-family:var(--font-heading);font-size:1.2rem;font-weight:700;color:var(--fg);margin:0 0 8px}.welcome-desc{font-size:.85rem;line-height:1.6;color:var(--fg-muted);margin:0 0 20px}.welcome-shortcuts{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;font-size:.75rem;color:var(--fg-muted)}.welcome-shortcuts kbd{font-family:var(--font-code);font-size:.7rem;padding:2px 6px;border-radius:4px;border:1px solid var(--border);background:var(--bg);color:var(--fg-muted);margin-right:4px}.project-card{display:flex;align-items:center;gap:16px;padding:16px;border-radius:10px;border:1px solid var(--border);background:var(--bg-elevated);cursor:pointer;transition:border-color .15s,background .15s}.project-card:hover{border-color:var(--border-hover);background:#1e293bcc}.project-card--active{border-color:#38bdf84d}.project-card-info{flex:1;min-width:0}.project-card-title{font-size:.9rem;font-weight:600;color:var(--fg);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.project-card-meta{font-size:.75rem;color:var(--fg-muted);margin-top:2px}.project-card-actions{display:flex;gap:4px;flex-shrink:0;opacity:0;transition:opacity .15s}.project-card:hover .project-card-actions{opacity:1}.project-card-action{padding:4px 8px;border-radius:6px;font-size:.7rem;font-family:var(--font-body);border:1px solid var(--border);background:transparent;color:var(--fg-muted);cursor:pointer;transition:all .15s}.project-card-action:hover{background:#ffffff0f;color:var(--fg);border-color:var(--border-hover)}.project-card-action--danger:hover{background:#ef44441a;color:#ef4444;border-color:#ef44444d}.shortcuts-overlay{position:fixed;inset:0;z-index:300;background:#0009;display:none;align-items:center;justify-content:center}.shortcuts-overlay--open{display:flex}.shortcuts-panel{background:var(--bg-elevated);border:1px solid var(--border-hover);border-radius:12px;padding:24px;min-width:320px;max-width:400px;box-shadow:0 16px 48px #00000080}.shortcuts-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.shortcuts-header h3{font-family:var(--font-heading);font-size:1rem;font-weight:600;color:var(--fg);margin:0}.shortcuts-close{background:none;border:none;color:var(--fg-muted);font-size:1.3rem;cursor:pointer;padding:2px 6px;border-radius:4px;line-height:1}.shortcuts-close:hover{color:var(--fg);background:#ffffff0f}.shortcuts-list{display:flex;flex-direction:column;gap:8px}.shortcut-row{display:flex;align-items:center;justify-content:space-between;gap:16px}.shortcut-row kbd{font-family:var(--font-code);font-size:.75rem;padding:3px 8px;border-radius:5px;border:1px solid var(--border);background:var(--bg);color:var(--fg-muted);white-space:nowrap}.shortcut-row span{font-size:.82rem;color:var(--fg)}@media(max-width:768px){.playground-toolbar{gap:6px;padding:6px 8px;height:auto;flex-wrap:wrap}.toolbar-left{flex:1 1 100%}.toolbar-right{flex-wrap:wrap;gap:6px}.toolbar-btn{padding:4px 8px;font-size:.7rem;white-space:nowrap}.toolbar-select{font-size:.75rem}.toolbar-project-title{max-width:140px;font-size:.8rem}.theme-picker-label{display:none}.playground-main{flex-direction:column}.playground-editor{flex:1 1 50%!important;width:100%;border-right:none;border-bottom:1px solid var(--border)}.playground-preview{flex:1 1 50%!important;width:100%}.resize-handle{display:none}.ai-drawer{width:100%}.project-overlay-content{padding:24px 16px}.project-actions-bar{flex-wrap:wrap}.project-card-actions{opacity:1}.scene-strip{display:none}}