:root{--bg-0: #06090f;--bg-1: #0c1220;--bg-2: #111c30;--bg-3: #172240;--bg-card: rgba(17, 28, 48, .85);--accent: #00d4ff;--accent-dim: rgba(0, 212, 255, .15);--accent-glow: 0 0 20px rgba(0, 212, 255, .35);--accent-2: #ff6b2b;--accent-2-dim: rgba(255, 107, 43, .15);--success: #00e5a0;--warning: #ffd740;--danger: #ff5252;--text-1: #e8edf5;--text-2: #94a3b8;--text-3: #4a5568;--border: rgba(255, 255, 255, .07);--border-accent: rgba(0, 212, 255, .35);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .4);--shadow-md: 0 4px 24px rgba(0, 0, 0, .5);--shadow-lg: 0 8px 48px rgba(0, 0, 0, .6);--r-sm: 6px;--r-md: 10px;--r-lg: 16px;--r-xl: 24px;--font-sans: "Inter", system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--ease: cubic-bezier(.4, 0, .2, 1);--transition: .2s var(--ease)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:14px;-webkit-font-smoothing:antialiased}body{font-family:var(--font-sans);background:var(--bg-0);color:var(--text-1);min-height:100vh;overflow-x:hidden}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-1)}::-webkit-scrollbar-thumb{background:var(--bg-3);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-3)}.flex{display:flex}.flex-col{display:flex;flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-1{gap:4px}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.gap-6{gap:24px}.w-full{width:100%}.h-full{height:100%}.flex-1{flex:1}.relative{position:relative}.absolute{position:absolute}.hidden{display:none!important}.text-center{text-align:center}.font-mono{font-family:var(--font-mono)}.text-muted{color:var(--text-2)}.text-sm{font-size:.857rem}.text-xs{font-size:.75rem}.text-lg{font-size:1.143rem}.text-xl{font-size:1.286rem}.text-2xl{font-size:1.571rem}.text-3xl{font-size:2rem}.font-medium{font-weight:500}.font-semibold{font-weight:600}.font-bold{font-weight:700}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-4{margin-top:16px}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 18px;border-radius:var(--r-sm);border:none;font-size:.857rem;font-weight:500;transition:all var(--transition);white-space:nowrap;-webkit-user-select:none;user-select:none;position:relative;overflow:hidden}.btn:disabled{opacity:.45;pointer-events:none}.btn-primary{background:linear-gradient(135deg,#00b4d8,#00d4ff);color:#030a12;box-shadow:0 0 16px #00d4ff40}.btn-primary:hover{box-shadow:var(--accent-glow);transform:translateY(-1px)}.btn-secondary{background:var(--bg-3);color:var(--text-1);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--border-accent);background:var(--bg-3);color:var(--accent)}.btn-danger{background:transparent;color:var(--danger);border:1px solid rgba(255,82,82,.3)}.btn-danger:hover{background:#ff52521a;border-color:var(--danger)}.btn-ghost{background:transparent;color:var(--text-2);border:1px solid transparent}.btn-ghost:hover{background:var(--bg-3);color:var(--text-1)}.btn-icon{padding:8px;width:34px;height:34px;border-radius:var(--r-sm)}.btn-lg{padding:12px 28px;font-size:1rem;border-radius:var(--r-md)}.input-group{display:flex;flex-direction:column;gap:6px}.input-group label{font-size:.8rem;font-weight:500;color:var(--text-2);text-transform:uppercase;letter-spacing:.05em}.input{width:100%;padding:10px 14px;background:var(--bg-1);border:1px solid var(--border);border-radius:var(--r-sm);color:var(--text-1);font-size:.929rem;transition:border-color var(--transition),box-shadow var(--transition);outline:none}.input:focus{border-color:var(--border-accent);box-shadow:0 0 0 3px var(--accent-dim)}.input::placeholder{color:var(--text-3)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:#06090fe6;border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);position:sticky;top:0;z-index:100}.logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:800;letter-spacing:-.02em}.logo-icon{width:28px;height:28px;background:linear-gradient(135deg,#00b4d8,#00d4ff);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:.8rem;color:#030a12;box-shadow:var(--accent-glow)}.logo-text{color:var(--text-1)}.logo-text span{color:var(--accent)}#toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:10px;pointer-events:none}.toast{display:flex;align-items:center;gap:10px;padding:12px 18px;border-radius:var(--r-md);background:var(--bg-2);border:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);font-size:.875rem;box-shadow:var(--shadow-lg);animation:slideIn .25s var(--ease) forwards;pointer-events:all}.toast.success{border-color:#00e5a066}.toast.error{border-color:#ff525266}.toast.info{border-color:var(--border-accent)}@keyframes slideIn{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:translate(0)}}@keyframes slideOut{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(24px)}}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#06090fbf;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:200;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s var(--ease)}.modal{background:var(--bg-2);border:1px solid var(--border);border-radius:var(--r-xl);padding:32px;width:100%;max-width:480px;box-shadow:var(--shadow-lg);animation:scaleIn .2s var(--ease)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.badge-cyan{background:var(--accent-dim);color:var(--accent)}.badge-orange{background:var(--accent-2-dim);color:var(--accent-2)}.badge-green{background:#00e5a01f;color:var(--success)}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.divider{height:1px;background:var(--border);margin:16px 0}.auth-page{min-height:100vh;display:grid;grid-template-columns:1fr 480px}.auth-left{background:var(--bg-1);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px;position:relative;overflow:hidden}.auth-left:before{content:"";position:absolute;width:500px;height:500px;background:radial-gradient(circle,rgba(0,212,255,.08) 0%,transparent 70%);top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none}.auth-brand-title{font-size:3.5rem;font-weight:800;letter-spacing:-.03em;line-height:1.1}.auth-brand-title span{color:var(--accent)}.auth-brand-sub{margin-top:16px;color:var(--text-2);font-size:1rem;max-width:320px;line-height:1.6;text-align:center}.auth-features{margin-top:40px;display:flex;flex-direction:column;gap:14px}.auth-feature{display:flex;align-items:center;gap:12px;color:var(--text-2);font-size:.875rem}.auth-feature-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0;box-shadow:0 0 8px var(--accent)}.auth-right{background:var(--bg-0);display:flex;align-items:center;justify-content:center;padding:48px 40px;border-left:1px solid var(--border)}.auth-form-box{width:100%;max-width:360px}.auth-form-box h2{font-size:1.5rem;font-weight:700;margin-bottom:8px}.auth-form-box .auth-sub{color:var(--text-2);font-size:.875rem;margin-bottom:32px}.auth-switch{margin-top:24px;text-align:center;color:var(--text-2);font-size:.85rem}.auth-switch a{color:var(--accent);font-weight:500;cursor:pointer}.auth-switch a:hover{text-decoration:underline}.auth-error{background:#ff52521a;border:1px solid rgba(255,82,82,.3);border-radius:var(--r-sm);padding:10px 14px;font-size:.85rem;color:var(--danger);margin-bottom:16px}.library-layout{display:flex;flex-direction:column;height:100vh;overflow:hidden}.library-body{display:flex;flex:1;overflow:hidden}.library-sidebar{width:220px;flex-shrink:0;background:var(--bg-1);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 0;overflow-y:auto}.sidebar-section{padding:0 12px;margin-bottom:8px}.sidebar-label{font-size:.7rem;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.06em;padding:8px 8px 6px}.sidebar-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--r-sm);color:var(--text-2);font-size:.857rem;cursor:pointer;transition:all var(--transition);-webkit-user-select:none;user-select:none}.sidebar-item:hover{background:var(--bg-2);color:var(--text-1)}.sidebar-item.active{background:var(--accent-dim);color:var(--accent)}.sidebar-icon{font-size:1rem}.library-main{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:20px}.library-toolbar{display:flex;align-items:center;gap:12px}.library-search{flex:1;max-width:360px}.library-count{color:var(--text-2);font-size:.857rem;margin-left:auto}.parts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.part-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;cursor:pointer;transition:all .25s var(--ease);position:relative;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.part-card:hover{border-color:var(--border-accent);transform:translateY(-3px);box-shadow:var(--shadow-md),0 0 20px #00d4ff14}.folder-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;cursor:pointer;transition:all .25s var(--ease);display:flex;flex-direction:column;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.folder-card:hover{border-color:var(--border-accent);transform:translateY(-3px);background:var(--accent-dim)}.folder-card.drag-over{border-color:var(--accent);background:#00d4ff33;transform:scale(1.02)}.breadcrumb{display:flex;align-items:center;gap:8px;font-size:.9rem;color:var(--text-2)}.breadcrumb-item{cursor:pointer;transition:color var(--transition)}.breadcrumb-item:hover{color:var(--text-1)}.breadcrumb-separator{opacity:.5;font-size:.8rem}.part-thumb{width:100%;height:160px;background:var(--bg-1);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}.part-thumb img{width:100%;height:100%;object-fit:contain;padding:16px}.part-thumb-placeholder{color:var(--text-3);font-size:2.5rem;display:flex;flex-direction:column;align-items:center;gap:8px}.part-thumb-placeholder span{font-size:.75rem;font-weight:500;color:var(--text-3)}.part-card-body{padding:14px 16px}.part-name{font-weight:600;font-size:.929rem;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.part-meta{font-size:.75rem;color:var(--text-2);display:flex;gap:8px}.part-card-actions{display:flex;align-items:center;gap:6px;padding:10px 12px;border-top:1px solid var(--border)}.upload-zone{border:2px dashed var(--border);border-radius:var(--r-lg);padding:40px 24px;text-align:center;cursor:pointer;transition:all var(--transition);background:var(--bg-1)}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--border-accent);background:var(--accent-dim)}.upload-zone-icon{font-size:2.5rem;margin-bottom:12px}.upload-zone h3{font-size:1rem;font-weight:600;margin-bottom:6px}.upload-zone p{color:var(--text-2);font-size:.857rem}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:80px 24px;color:var(--text-2);text-align:center}.empty-state-icon{font-size:4rem;opacity:.3}.empty-state h3{font-size:1.1rem;font-weight:600;color:var(--text-1)}.empty-state p{font-size:.875rem;max-width:300px}.editor-layout{display:flex;flex-direction:column;height:100vh;overflow:hidden}.editor-body{display:flex;flex:1;overflow:hidden}.editor-left{width:280px;flex-shrink:0;background:var(--bg-1);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.editor-left-header{padding:16px;border-bottom:1px solid var(--border);font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-2);display:flex;align-items:center;justify-content:space-between}.editor-center{flex:1;position:relative;background:var(--bg-0);overflow:hidden}.editor-right{width:320px;flex-shrink:0;background:var(--bg-1);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.editor-right-tabs{display:flex;border-bottom:1px solid var(--border)}.editor-tab{flex:1;padding:12px;text-align:center;font-size:.8rem;font-weight:500;color:var(--text-2);cursor:pointer;border-bottom:2px solid transparent;transition:all var(--transition)}.editor-tab.active{color:var(--accent);border-bottom-color:var(--accent);background:var(--accent-dim)}.editor-tab-content{flex:1;overflow-y:auto;padding:16px}#viewer-canvas{width:100%;height:100%;display:block}.viewer-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:var(--bg-0);flex-direction:column;gap:16px;color:var(--text-2)}.viewer-controls{position:absolute;bottom:16px;right:16px;display:flex;flex-direction:column;gap:6px}.op-item{padding:10px 12px;border-radius:var(--r-sm);border:1px solid var(--border);margin-bottom:6px;cursor:pointer;transition:all var(--transition);display:flex;align-items:flex-start;gap:10px}.op-item:hover{border-color:var(--border-accent)}.op-item.selected{border-color:var(--accent);background:var(--accent-dim)}.op-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0;margin-top:3px}.op-info{flex:1;min-width:0}.op-type{font-size:.8rem;font-weight:600}.op-detail{font-size:.75rem;color:var(--text-2);margin-top:2px}.status-bar{height:28px;background:var(--bg-1);border-top:1px solid var(--border);display:flex;align-items:center;padding:0 16px;gap:24px;font-size:.75rem;color:var(--text-2);flex-shrink:0}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--success)}.breadcrumb{display:flex;align-items:center;gap:6px;font-size:.857rem;color:var(--text-2)}.breadcrumb a{cursor:pointer}.breadcrumb a:hover{color:var(--accent)}.breadcrumb-sep{color:var(--text-3)}.breadcrumb-current{color:var(--text-1);font-weight:500}.fade-in{animation:fadeIn .3s var(--ease)}.slide-up{animation:slideUp .3s var(--ease)}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.accent-line{height:2px;background:linear-gradient(90deg,var(--accent),transparent);border-radius:1px}.progress-bar{width:100%;height:3px;background:var(--bg-3);border-radius:2px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#00b4d8,#00d4ff);border-radius:2px;transition:width .3s var(--ease)}.shimmer{background:linear-gradient(90deg,var(--bg-2) 25%,var(--bg-3) 50%,var(--bg-2) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--r-sm)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}body{position:relative}