@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700;800&display=swap";
:root{--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--bg-elevated:#fff;--bg-hover:#f1f5f9;--bg-active:#e2e8f0;--surface-glass:#ffffffe6;--surface-glass-hover:#f8fafc;--surface-glass-active:#f1f5f9;--text-primary:#0f172a;--text-secondary:#334155;--text-tertiary:#64748b;--text-muted:#94a3b8;--accent-primary:#3b82f6;--accent-primary-hover:#2563eb;--accent-primary-glow:#3b82f633;--accent-success:#10b981;--accent-danger:#ef4444;--border-color:#e2e8f0;--border-color-hover:#cbd5e1;--blueprint-grid:#e2e8f0;--blueprint-grid-major:#cbd5e1;--blueprint-wall:#1e293b;--space-xs:4px;--space-sm:8px;--space-md:12px;--space-lg:16px;--space-xl:20px;--space-2xl:24px;--space-3xl:32px;--sidebar-width:330px;--properties-width:320px;--toolbar-height:52px;--header-height:52px;--font-family:"Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-xs:11px;--font-sm:12px;--font-md:13px;--font-lg:14px;--font-xl:16px;--font-2xl:20px;--radius-sm:4px;--radius-md:6px;--radius-lg:8px;--radius-full:9999px;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--transition-fast:.15s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;font-family:var(--font-family);font-size:var(--font-md);color:var(--text-primary);background:var(--bg-primary)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--bg-active);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}.app-layout{background:var(--bg-primary);flex-direction:column;width:100vw;height:100vh;display:flex;overflow:hidden}body:has(.app-layout){overflow:hidden}.app-header{height:70px;padding:0 var(--space-xl);background:var(--bg-primary);border-bottom:1px solid var(--border-color);z-index:100;box-shadow:var(--shadow-sm);flex-shrink:0;justify-content:space-between;align-items:center;display:flex}.app-logo{align-items:center;gap:var(--space-sm);font-size:var(--font-xl);color:var(--text-primary);letter-spacing:-.5px;font-weight:700;display:flex}.app-logo-icon{font-size:20px}@media (prefers-color-scheme:dark){.logo-img{filter:invert()brightness(2)}}.app-header-actions{align-items:center;gap:var(--space-sm);display:flex}.app-body{flex:1;display:flex;position:relative;overflow:hidden}.toolbar{height:var(--toolbar-height);padding:0 var(--space-md);background:var(--bg-secondary);border-bottom:1px solid var(--border-color);align-items:center;gap:var(--space-xs);z-index:90;flex-shrink:0;display:flex}.toolbar-group{align-items:center;gap:var(--space-xs);padding:0 var(--space-sm);display:flex}.toolbar-group:not(:last-child){border-right:1px solid var(--border-color);padding-right:var(--space-md);margin-right:var(--space-xs)}.btn{justify-content:center;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);color:var(--text-secondary);font-size:var(--font-sm);font-weight:500;font-family:var(--font-family);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;-webkit-user-select:none;user-select:none;height:32px;line-height:1;display:inline-flex}.btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-color-hover)}.btn.active{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.btn.active:hover{background:var(--accent-primary-hover)}.btn-danger-hover:hover{color:#dc2626!important;background:#fef2f2!important;border-color:#fca5a5!important}.btn-save-primary:hover:not(:disabled){background-color:#1d4ed8!important;box-shadow:0 2px 4px #2563eb4d!important}.btn-icon{width:32px;height:32px;padding:0}.btn-primary{background:var(--accent-primary);color:#fff;border-color:#0000}.btn-primary:hover{background:var(--accent-primary-hover);color:#fff}.btn-success{background:var(--accent-success);color:#fff;border-color:#0000}.btn-success:hover{background:#059669}.view-toggle{background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-lg);align-items:center;gap:2px;padding:2px;display:flex}.view-toggle-btn{align-items:center;gap:var(--space-xs);border-radius:var(--radius-md);color:var(--text-tertiary);font-size:var(--font-sm);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;padding:4px 12px;font-weight:500;display:flex}.view-toggle-btn.active{background:var(--bg-primary);color:var(--text-primary);box-shadow:var(--shadow-sm)}.sidebar{background:var(--bg-primary);border-right:1px solid var(--border-color);height:100%;transition:all var(--transition-fast);z-index:80;flex-direction:row;flex-shrink:0;display:flex;overflow:hidden}.sidebar.collapsed{opacity:0;pointer-events:none;width:0!important}.sidebar-rail{background:var(--bg-secondary);border-right:1px solid var(--border-color);box-sizing:border-box;z-index:2;flex-direction:column;flex-shrink:0;justify-content:space-between;align-items:center;width:52px;height:100%;padding:10px 0;display:flex}.sidebar-rail-group{flex-direction:column;align-items:center;gap:6px;width:100%;display:flex}.sidebar-rail-btn{border-radius:var(--radius-md);width:38px;height:38px;color:var(--text-tertiary);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;justify-content:center;align-items:center;display:flex;position:relative}.sidebar-rail-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-rail-btn.active{background:var(--accent-primary-glow,#3b82f626);color:var(--accent-primary)}.sidebar-rail-btn.active:before{content:"";background:var(--accent-primary);border-radius:0 3px 3px 0;width:3px;position:absolute;top:6px;bottom:6px;left:0}.sidebar-drawer{background:var(--bg-primary);width:310px;height:100%;transition:width var(--transition-fast);flex-direction:column;flex-shrink:0;display:flex;overflow:hidden}.sidebar-drawer.closed{width:0;overflow:hidden}.sidebar-header{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color);background:var(--bg-secondary);justify-content:space-between;align-items:center;display:flex}.sidebar-title{font-size:var(--font-md);color:var(--text-primary);font-weight:600}.sidebar-content{flex:1;overflow-y:auto}.sidebar-tabs{background:var(--bg-tertiary);border-bottom:1px solid var(--border-color);gap:4px;padding:4px 6px;display:flex}.sidebar-tab{text-align:center;color:var(--text-tertiary);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;background:0 0;border:none;flex:1;justify-content:center;align-items:center;gap:6px;padding:8px 6px;font-size:12px;font-weight:500;display:inline-flex}.sidebar-tab:hover{color:var(--text-primary);background:#00000008}.sidebar-tab.active{background:var(--bg-primary);color:var(--accent-primary);font-weight:600;box-shadow:0 1px 3px #00000014}.tool-list{padding:var(--space-md);gap:var(--space-sm);flex-direction:column;display:flex}.tool-btn{align-items:center;gap:var(--space-md);padding:var(--space-sm) var(--space-md);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-secondary);font-size:var(--font-sm);text-align:left;cursor:pointer;transition:all var(--transition-fast);display:flex}.tool-btn:hover{background:var(--bg-hover);border-color:var(--border-color-hover)}.tool-btn.active{border-color:var(--accent-primary);background:var(--bg-hover)}.canvas-area{background:var(--bg-primary);flex:1;position:relative;overflow:hidden}.canvas-container{width:100%;height:100%;position:relative}.canvas-3d-container{width:100%;height:100%;position:absolute;top:0;left:0}.properties-panel{width:var(--properties-width);background:var(--bg-primary);border-left:1px solid var(--border-color);height:100%;transition:width var(--transition-fast);z-index:80;flex-direction:column;flex-shrink:0;display:flex;overflow:hidden}.properties-panel.collapsed{opacity:0;pointer-events:none;width:0}.properties-header{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border-color);background:var(--bg-secondary);font-size:var(--font-md);font-weight:600}.properties-content{padding:var(--space-lg);flex:1;overflow-y:auto}.property-group{margin-bottom:var(--space-lg)}.property-group-title{color:var(--text-tertiary);text-transform:uppercase;margin-bottom:var(--space-sm);font-size:11px;font-weight:600}.property-row{align-items:center;gap:var(--space-sm);margin-bottom:var(--space-sm);display:flex}.property-label{font-size:var(--font-sm);color:var(--text-secondary);width:70px}.property-input{height:28px;padding:0 var(--space-sm);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:var(--font-sm);outline:none;flex:1}.property-input:focus{border-color:var(--accent-primary)}.zoom-controls{bottom:var(--space-md);right:var(--space-md);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);z-index:10;display:flex;position:absolute}.view-3d-hint{top:var(--space-md);background:var(--bg-elevated);border:1px solid var(--border-color);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-full);font-size:var(--font-xs);color:var(--text-secondary);box-shadow:var(--shadow-md);pointer-events:none;position:absolute;left:50%;transform:translate(-50%)}.dashboard{background:var(--bg-secondary);flex-direction:column;min-height:100vh;display:flex}.dashboard-header{background:var(--bg-primary);border-bottom:1px solid var(--border-color);z-index:50;box-shadow:var(--shadow-sm);justify-content:space-between;align-items:center;padding:6px 32px;display:flex;position:sticky;top:0}.dashboard-logo{color:var(--text-primary);letter-spacing:-.5px;align-items:center;gap:10px;font-size:18px;font-weight:700;display:flex}.dashboard-header-actions{align-items:center;gap:12px;display:flex}.dashboard-header-actions .btn{height:40px;padding:8px 18px;font-size:15px}.dashboard-header-actions .btn.active{background:var(--bg-active);color:var(--accent-primary);border-color:var(--border-color-hover);font-weight:600}.feedback-btn{color:var(--accent-primary)!important;background:#3b82f614!important;border:1px solid #3b82f640!important;transition:all .2s!important}.feedback-btn:hover{transform:translateY(-1px);border-color:var(--accent-primary)!important;background:#3b82f62e!important;box-shadow:0 0 12px #3b82f633!important}.dashboard-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:32px}.dashboard-section-title{color:var(--text-primary);margin-bottom:20px;font-size:20px;font-weight:700}.dashboard-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;display:grid}.project-card{background:var(--bg-primary);border:1px solid var(--border-color);cursor:pointer;box-shadow:var(--shadow-sm);border-radius:12px;transition:all .2s;position:relative;overflow:visible}.project-card:hover{border-color:var(--accent-primary);z-index:10;transform:translateY(-2px);box-shadow:0 4px 20px #3b82f61f}.project-card-thumbnail{background:#fff;border-radius:12px 12px 0 0;width:100%;height:160px;position:relative;overflow:hidden}.project-card-empty{width:100%;height:100%;color:var(--text-muted);justify-content:center;align-items:center;display:flex}.project-card-new-inner{color:var(--accent-primary);flex-direction:column;gap:8px;font-size:13px;font-weight:500}.project-card-new:hover .project-card-new-inner{color:var(--accent-primary-hover)}.project-card-info{flex-direction:column;gap:4px;padding:12px 14px;display:flex}.project-card-name-row{justify-content:space-between;align-items:center;gap:8px;display:flex}.project-card-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:13px;font-weight:600;overflow:hidden}.project-card-name-input{color:var(--text-primary);background:var(--bg-secondary);border:1px solid var(--accent-primary);border-radius:4px;outline:none;flex:1;padding:2px 6px;font-size:13px;font-weight:600}.project-card-date{color:var(--text-muted);font-size:11px}.project-card-menu-btn{width:24px;height:24px;color:var(--text-tertiary);cursor:pointer;background:0 0;border:none;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;transition:all .15s;display:flex}.project-card-menu-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.project-card-menu{background:var(--bg-primary);border:1px solid var(--border-color);z-index:1000;border-radius:8px;min-width:140px;margin-top:4px;padding:4px;animation:.12s menuFadeIn;position:absolute;top:100%;right:0;box-shadow:0 10px 25px -5px #0003,0 8px 10px -6px #0000001a}@keyframes menuFadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.project-card-menu button{width:100%;color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:5px;align-items:center;gap:8px;padding:7px 10px;font-size:12px;transition:background .1s;display:flex}.project-card-menu button:hover{background:var(--bg-hover);color:var(--text-primary)}.project-card-menu button.danger{color:var(--accent-danger)}.project-card-menu button.danger:hover{background:#ef444414}.project-card-menu-divider{background:var(--border-color);height:1px;margin:4px 0}.dashboard-loading{color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:80px 0;display:flex}.dashboard-spinner{border:3px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;width:32px;height:32px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.dashboard-empty{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:80px 24px;display:flex}.dashboard-empty-icon{color:var(--text-muted);opacity:.6;margin-bottom:20px}.dashboard-empty h3{color:var(--text-primary);margin-bottom:8px;font-size:20px;font-weight:700}.dashboard-empty p{color:var(--text-secondary);max-width:400px;font-size:14px;line-height:1.5}.dashboard-empty-actions{gap:12px;margin-top:28px;display:flex}.dashboard-empty-hint{color:var(--text-muted)!important;margin-top:24px!important;font-size:12px!important}.btn-lg{height:40px;padding:0 20px;font-size:14px}.dashboard{min-height:100vh;overflow-y:auto}.hero{text-align:center;background:radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-primary-glow), transparent), var(--bg-secondary);padding:80px 32px 60px;position:relative;overflow:hidden}.hero:before{content:"";background-image:linear-gradient(var(--blueprint-grid) 1px, transparent 1px), linear-gradient(90deg, var(--blueprint-grid) 1px, transparent 1px);opacity:.45;pointer-events:none;background-size:40px 40px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#0000 0%,#000 30% 70%,#0000 100%);mask-image:linear-gradient(#0000 0%,#000 30% 70%,#0000 100%)}.hero-content{z-index:1;max-width:720px;margin:0 auto;position:relative}.hero-badge{border-radius:var(--radius-full);color:var(--accent-primary);letter-spacing:.3px;background:#3b82f614;border:1px solid #3b82f62e;align-items:center;gap:6px;margin-bottom:24px;padding:6px 16px;font-size:12px;font-weight:600;display:inline-flex}.hero h1{letter-spacing:-1.5px;color:var(--text-primary);margin-bottom:16px;font-size:44px;font-weight:800;line-height:1.15}.hero h1 .gradient-text{background:linear-gradient(135deg,#3b82f6,#8b5cf6);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-subtitle{color:var(--text-secondary);max-width:540px;margin:0 auto 32px;font-size:17px;line-height:1.6}.hero-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.hero-btn{border-radius:var(--radius-lg);cursor:pointer;font-size:15px;font-weight:600;font-family:var(--font-family);border:none;align-items:center;gap:8px;padding:14px 28px;transition:all .25s;display:inline-flex}.hero-btn-primary{color:#fff;background:linear-gradient(135deg,#3b82f6,#6366f1);box-shadow:0 4px 20px #3b82f64d}.hero-btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px #3b82f666}.hero-btn-secondary{background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.hero-btn-secondary:hover{background:var(--bg-hover);border-color:var(--border-color-hover);transform:translateY(-1px)}.hero-stats{border-top:1px solid var(--border-color);justify-content:center;gap:48px;margin-top:40px;padding-top:32px;display:flex}.hero-stat{text-align:center}.hero-stat-value{color:var(--text-primary);letter-spacing:-.5px;font-size:28px;font-weight:800}.hero-stat-label{color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;margin-top:4px;font-size:12px;font-weight:500}.features-section{max-width:1100px;margin:0 auto;padding:64px 32px}.section-header{text-align:center;margin-bottom:48px}.section-overline{color:var(--accent-primary);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:12px;font-size:12px;font-weight:700;display:inline-block}.section-title{color:var(--text-primary);letter-spacing:-1px;margin-bottom:12px;font-size:32px;font-weight:800}.section-subtitle{color:var(--text-secondary);max-width:480px;margin:0 auto;font-size:15px;line-height:1.5}.features-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}@media (max-width:800px){.features-grid{grid-template-columns:1fr}.hero h1{font-size:32px}.hero-stats{gap:24px}.howto-steps{grid-template-columns:1fr!important}.why-grid{grid-template-columns:1fr}}.feature-card{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:16px;padding:28px;transition:all .3s;position:relative;overflow:hidden}.feature-card:before{content:"";opacity:0;background:linear-gradient(90deg,#3b82f6,#8b5cf6);height:3px;transition:opacity .3s;position:absolute;top:0;left:0;right:0}.feature-card:hover{border-color:var(--accent-primary);transform:translateY(-4px);box-shadow:0 8px 30px #3b82f614}.feature-card:hover:before{opacity:1}.feature-icon{border-radius:12px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:16px;font-size:22px;display:flex}.feature-icon-blue{color:#3b82f6;background:#3b82f61a}.feature-icon-purple{color:#8b5cf6;background:#8b5cf61a}.feature-icon-green{color:#10b981;background:#10b9811a}.feature-icon-amber{color:#f59e0b;background:#f59e0b1a}.feature-icon-rose{color:#f43f5e;background:#f43f5e1a}.feature-icon-cyan{color:#06b6d4;background:#06b6d41a}.feature-card h3{color:var(--text-primary);margin-bottom:8px;font-size:16px;font-weight:700}.feature-card p{color:var(--text-secondary);font-size:13px;line-height:1.55}.howto-section{background:radial-gradient(ellipse 60% 40% at 50% 100%, #8b5cf60f, transparent), var(--bg-secondary);padding:64px 32px}.howto-inner{max-width:1100px;margin:0 auto}.howto-steps{counter-reset:step;grid-template-columns:repeat(4,1fr);gap:24px;display:grid}.howto-step{background:var(--bg-primary);border:1px solid var(--border-color);text-align:center;counter-increment:step;border-radius:16px;padding:28px 24px;transition:all .25s;position:relative}.howto-step:hover{transform:translateY(-4px);box-shadow:0 8px 24px #0000000f}.howto-step-number{color:#fff;background:linear-gradient(135deg,#3b82f6,#8b5cf6);border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;margin:0 auto 16px;font-size:16px;font-weight:800;display:flex}.howto-step h3{color:var(--text-primary);margin-bottom:8px;font-size:15px;font-weight:700}.howto-step p{color:var(--text-secondary);font-size:13px;line-height:1.5}.projects-section{width:100%;max-width:1200px;margin:0 auto;padding:48px 32px}.faq-section{max-width:720px;margin:0 auto;padding:64px 32px}.faq-item{border:1px solid var(--border-color);background:var(--bg-primary);border-radius:12px;margin-bottom:12px;transition:all .2s;overflow:hidden}.faq-item:hover{border-color:var(--border-color-hover)}.faq-question{width:100%;font-family:var(--font-family);color:var(--text-primary);cursor:pointer;text-align:left;background:0 0;border:none;justify-content:space-between;align-items:center;gap:12px;padding:18px 20px;font-size:15px;font-weight:600;display:flex}.faq-question:hover{color:var(--accent-primary)}.faq-chevron{color:var(--text-tertiary);flex-shrink:0;transition:transform .3s}.faq-chevron.open{transform:rotate(180deg)}.faq-answer{color:var(--text-secondary);padding:0 20px 18px;font-size:14px;line-height:1.6}.homepage-footer{text-align:center;border-top:1px solid var(--border-color);background:var(--bg-primary);padding:32px}.footer-logo{color:var(--text-primary);align-items:center;gap:8px;margin-bottom:12px;font-size:16px;font-weight:700;display:inline-flex}.footer-tagline{color:var(--text-secondary);margin-bottom:16px;font-size:13px;line-height:1.5}.footer-contact{color:var(--accent-primary);border-radius:var(--radius-full);background:#3b82f60f;border:1px solid #3b82f61f;align-items:center;gap:6px;padding:8px 16px;font-size:13px;text-decoration:none;transition:all .2s;display:inline-flex}.footer-contact:hover{background:#3b82f61f;border-color:#3b82f640}.footer-copy{color:var(--text-muted);margin-top:16px;font-size:12px}.footer-nav{flex-wrap:wrap;justify-content:center;gap:24px;margin-bottom:16px;display:flex}.footer-nav a{color:var(--text-secondary);font-size:13px;text-decoration:none;transition:color .2s}.footer-nav a:hover{color:var(--accent-primary)}.why-section{max-width:1100px;margin:0 auto;padding:64px 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