:root{--brand-primary: #3D93A3;--brand-primary-light: #5DB4C4;--brand-primary-dark: #2D7A88;--brand-primary-subtle: rgba(61,147,163,.08);--brand-primary-glow: rgba(61,147,163,.25);--brand-white: #FFFFFF;--brand-gray: #6F6F6E;--bg-main: #F4F7F9;--bg-canvas: #E8EDF1;--bg-card: #FFFFFF;--bg-sidebar: rgba(255,255,255,.92);--bg-header: rgba(255,255,255,.85);--text-primary: #1A2332;--text-secondary: #5A6B7D;--text-muted: #9AABB8;--border-light: rgba(61,147,163,.12);--border-medium: rgba(61,147,163,.2);--shadow-sm: 0 1px 3px rgba(0,0,0,.06);--shadow-md: 0 4px 16px rgba(0,0,0,.08);--shadow-lg: 0 8px 32px rgba(0,0,0,.1);--shadow-glow: 0 0 20px rgba(61,147,163,.15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--sidebar-width: 340px;--header-height: 60px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-smooth: .4s cubic-bezier(.4,0,.2,1)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-main);color:var(--text-primary);-webkit-font-smoothing:antialiased}.hidden{display:none!important}#loading-screen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f4f7f9,#e0ecf0,#d4e5ea);transition:opacity .6s ease,visibility .6s ease}#loading-screen.fade-out{opacity:0;visibility:hidden;pointer-events:none}#loading-screen.hidden{display:none!important}.loading-content{text-align:center;animation:loadFadeIn .8s ease forwards}@keyframes loadFadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.loading-brand-logo{width:120px;height:auto;margin-bottom:16px;filter:drop-shadow(0 2px 8px rgba(61,147,163,.2))}.loading-tagline{color:var(--text-secondary);font-size:.95rem;margin-bottom:32px;letter-spacing:.5px}.loading-bar-container{width:240px;height:4px;background:#3d93a31f;border-radius:4px;margin:0 auto 12px;overflow:hidden}.loading-bar{width:0%;height:100%;background:linear-gradient(90deg,var(--brand-primary),var(--brand-primary-light));border-radius:4px;transition:width .3s ease}.loading-percent{font-size:.8rem;color:var(--text-muted);font-weight:500;font-variant-numeric:tabular-nums}.loading-spinner{width:40px;height:40px;border:3px solid var(--border-light);border-top-color:var(--brand-primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}#header{position:fixed;top:0;left:0;right:var(--sidebar-width);height:var(--header-height);z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 24px;background:var(--bg-header);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-light)}.header-left{display:flex;align-items:center;gap:14px}.header-logo-img{height:36px;width:auto;object-fit:contain}.header-divider{width:1px;height:24px;background:var(--border-medium)}.header-subtitle{font-size:.85rem;color:var(--text-secondary);font-weight:500;letter-spacing:.5px}.header-right{display:flex;gap:8px}.header-btn{display:flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-secondary);font-size:.8rem;font-weight:500;font-family:inherit;cursor:pointer;transition:all var(--transition-fast)}.header-btn:hover,.header-btn.active{border-color:var(--brand-primary);color:var(--brand-primary);background:var(--brand-primary-subtle)}#canvas-container{position:fixed;top:var(--header-height);left:0;right:var(--sidebar-width);bottom:0;background:var(--bg-canvas)}#three-canvas{width:100%!important;height:100%!important;display:block}#sidebar{position:fixed;top:0;right:0;bottom:0;width:var(--sidebar-width);z-index:200;display:flex;flex-direction:column;background:var(--bg-sidebar);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-left:1px solid var(--border-light);box-shadow:-4px 0 24px #0000000a}#sidebar-tabs{display:flex;padding:12px 12px 0;gap:4px;border-bottom:1px solid var(--border-light);flex-shrink:0}.tab-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 8px;border:none;background:transparent;color:var(--text-muted);font-size:.7rem;font-weight:500;font-family:inherit;cursor:pointer;border-radius:var(--radius-sm) var(--radius-sm) 0 0;transition:all var(--transition-fast);position:relative}.tab-btn:after{content:"";position:absolute;bottom:0;left:50%;transform:translate(-50%) scaleX(0);width:80%;height:2px;background:var(--brand-primary);border-radius:2px 2px 0 0;transition:transform var(--transition-normal)}.tab-btn:hover{color:var(--text-secondary);background:var(--brand-primary-subtle)}.tab-btn.active{color:var(--brand-primary);background:var(--brand-primary-subtle)}.tab-btn.active:after{transform:translate(-50%) scaleX(1)}.tab-contents{flex:1;overflow-y:auto;overflow-x:hidden;padding:20px 20px 100px;scroll-behavior:smooth}.tab-contents::-webkit-scrollbar{width:4px}.tab-contents::-webkit-scrollbar-thumb{background:var(--border-medium);border-radius:4px}.tab-content{display:none;animation:tabFadeIn .3s ease forwards}.tab-content.active{display:block}@keyframes tabFadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.tab-title{font-size:1.1rem;font-weight:700;color:var(--text-primary);margin-bottom:20px;letter-spacing:-.3px}.config-group{margin-bottom:24px}.config-label{display:block;font-size:.78rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.8px;margin-bottom:10px}.color-grid{display:flex;flex-wrap:wrap;gap:8px}.color-swatch{width:36px;height:36px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all var(--transition-fast);outline:none;position:relative}.color-swatch:hover{transform:scale(1.15);box-shadow:var(--shadow-md)}.color-swatch.active{border-color:var(--brand-primary);box-shadow:0 0 0 3px var(--brand-primary-glow);transform:scale(1.1)}.color-swatch.active:after{content:"✓";position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.4)}.custom-color-row{display:flex;align-items:center;gap:10px;margin-top:10px}.custom-color-row input[type=color]{width:36px;height:36px;border:2px solid var(--border-light);border-radius:50%;cursor:pointer;padding:2px;background:transparent;-webkit-appearance:none}.custom-color-row input[type=color]::-webkit-color-swatch-wrapper{padding:0}.custom-color-row input[type=color]::-webkit-color-swatch{border:none;border-radius:50%}.custom-color-row span{font-size:.8rem;color:var(--text-muted);font-weight:500}.material-options,.font-options{display:flex;gap:8px}.material-btn,.font-btn{flex:1;padding:10px 12px;border:1.5px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-secondary);font-size:.82rem;font-weight:500;font-family:inherit;cursor:pointer;transition:all var(--transition-fast)}.material-btn:hover,.font-btn:hover{border-color:var(--brand-primary);color:var(--brand-primary)}.material-btn.active,.font-btn.active{border-color:var(--brand-primary);background:var(--brand-primary-subtle);color:var(--brand-primary);font-weight:600}.config-input{width:100%;padding:12px 16px;border:1.5px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-size:.9rem;font-family:inherit;outline:none;transition:all var(--transition-fast)}.config-input:focus{border-color:var(--brand-primary);box-shadow:0 0 0 3px var(--brand-primary-glow)}.config-input::placeholder{color:var(--text-muted)}.config-slider{width:100%;height:6px;border-radius:3px;background:var(--border-light);outline:none;-webkit-appearance:none;cursor:pointer}.config-slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--brand-primary);border:3px solid white;box-shadow:var(--shadow-md);cursor:pointer}.slider-labels{display:flex;justify-content:space-between;margin-top:6px;font-size:.72rem;color:var(--text-muted);font-weight:500}.wheel-size-options,.wheel-type-options{display:flex;gap:8px}.wheel-size-btn,.wheel-type-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 8px;border:1.5px solid var(--border-light);border-radius:var(--radius-md);background:var(--bg-card);color:var(--text-secondary);font-size:.78rem;font-weight:500;font-family:inherit;cursor:pointer;transition:all var(--transition-fast)}.wheel-size-btn:hover,.wheel-type-btn:hover{border-color:var(--brand-primary)}.wheel-size-btn.active,.wheel-type-btn.active{border-color:var(--brand-primary);background:var(--brand-primary-subtle);color:var(--brand-primary)}.wheel-icon{border:2px solid currentColor;border-radius:50%}.wheel-icon.small{width:28px;height:28px}.wheel-icon.medium{width:36px;height:36px}.wheel-icon.large{width:44px;height:44px}.wheel-dim{font-size:.7rem;font-weight:600;color:var(--text-muted)}.wheel-size-btn.active .wheel-dim{color:var(--brand-primary)}.summary-card{background:var(--bg-main);border-radius:var(--radius-md);padding:16px;margin-bottom:20px;border:1px solid var(--border-light)}.summary-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--border-light)}.summary-row:last-child{border-bottom:none}.summary-label{font-size:.82rem;color:var(--text-secondary);font-weight:500}.summary-value{font-size:.82rem;color:var(--text-primary);font-weight:600;display:flex;align-items:center;gap:6px}.summary-dot{width:12px;height:12px;border-radius:50%;display:inline-block;border:1px solid rgba(0,0,0,.1)}.btn-primary{width:100%;padding:14px 24px;border:none;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--brand-primary),var(--brand-primary-dark));color:#fff;font-size:.95rem;font-weight:600;font-family:inherit;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:all var(--transition-normal);box-shadow:0 4px 16px #3d93a34d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px #3d93a366}.summary-note{text-align:center;font-size:.72rem;color:var(--text-muted);margin-top:12px;font-style:italic}#part-tooltip{position:fixed;padding:8px 14px;background:var(--bg-card);border:1px solid var(--border-light);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);font-size:.8rem;font-weight:500;color:var(--text-primary);pointer-events:none;z-index:500;white-space:nowrap}@media(max-width:900px){:root{--sidebar-width:100%;--header-height:56px}#header{right:0}#canvas-container{right:0;bottom:55vh}#sidebar{top:auto;bottom:0;height:55vh;width:100%;border-left:none;border-top:1px solid var(--border-light);border-radius:var(--radius-xl) var(--radius-xl) 0 0}.header-btn span{display:none}}