:root{--bg-color:#0f172a;--panel-bg:#1e293bb3;--panel-border:#ffffff1a;--text-main:#f8fafc;--text-muted:#94a3b8;--accent-color:#3b82f6;--accent-hover:#2563eb;--danger-color:#ef4444;--danger-hover:#dc2626;--success-color:#10b981;--success-hover:#059669;--input-bg:#0f172a99;--card-bg:#1e293bcc}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);min-height:100vh;font-family:Inter,sans-serif}.app-view{min-height:calc(100vh - 65px);padding:20px;display:none}.app-view.active{display:block}.main-navbar{z-index:1000;-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--panel-border);background:#0f172ae6;justify-content:space-between;align-items:center;height:65px;padding:0 30px;display:flex;position:sticky;top:0}.nav-brand{color:#fff;cursor:pointer;align-items:center;gap:12px;font-size:1.2rem;font-weight:700;text-decoration:none;display:flex}.nav-brand-icon{background:linear-gradient(135deg,#3b82f6,#8b5cf6);border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;font-size:1.2rem;display:flex}.nav-menu{align-items:center;gap:8px;display:flex}.nav-item{color:var(--text-muted);cursor:pointer;border:1px solid #0000;border-radius:8px;align-items:center;gap:8px;padding:8px 16px;font-size:.9rem;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{color:#fff;background:#ffffff0d}.nav-item.active{color:#fff;background:#3b82f626;border-color:#3b82f64d}#home-view{max-width:1200px;margin:0 auto;padding:40px 20px}.hero-section{text-align:center;margin-bottom:50px}.hero-title{background:linear-gradient(135deg,#60a5fa,#c084fc);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:15px;font-size:2.8rem;font-weight:800}.hero-subtitle{color:var(--text-muted);max-width:600px;margin:0 auto;font-size:1.1rem;line-height:1.6}.cards-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:30px;display:grid}.tool-card{background:var(--card-bg);border:1px solid var(--panel-border);border-radius:16px;flex-direction:column;justify-content:space-between;padding:30px;transition:transform .3s,box-shadow .3s,border-color .3s;display:flex;position:relative;overflow:hidden}.tool-card:hover{border-color:#60a5fa66;transform:translateY(-6px);box-shadow:0 20px 40px #0006}.tool-card-header{align-items:center;gap:16px;margin-bottom:20px;display:flex}.tool-icon{border-radius:12px;justify-content:center;align-items:center;width:56px;height:56px;font-size:1.8rem;display:flex}.icon-stl{background:linear-gradient(135deg,#f59e0b,#ef4444)}.icon-watermark{background:linear-gradient(135deg,#3b82f6,#06b6d4)}.icon-compressor{background:linear-gradient(135deg,#10b981,#6366f1)}.tool-card-title{color:#fff;font-size:1.3rem;font-weight:700}.tool-card-desc{color:var(--text-muted);margin-bottom:25px;font-size:.95rem;line-height:1.5}.tool-card-footer .btn{padding:12px 20px;font-size:1rem}#stl-app-view{height:calc(100vh - 65px);padding:0;position:relative;overflow:hidden}#viewport{z-index:1;width:100%;height:100%;position:absolute;top:0;left:0}#ui-container{z-index:10;pointer-events:none;width:95%;max-width:1200px;position:absolute;bottom:20px;left:50%;transform:translate(-50%)}.glass-panel{background:var(--panel-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--panel-border);pointer-events:auto;border-radius:12px;flex-direction:row;justify-content:space-between;align-items:center;gap:20px;padding:15px 20px;display:flex;overflow-x:auto;box-shadow:0 8px 32px #0000004d}.glass-panel>div,.glass-panel>hr{flex-shrink:0}.glass-panel hr{border:none;border-left:1px solid var(--panel-border);width:1px;height:40px;margin:0}.app-container{grid-template-columns:360px 1fr;gap:24px;max-width:1200px;margin:0 auto;display:grid}@media (width<=900px){.app-container{grid-template-columns:1fr}}.sidebar-panel{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:14px;flex-direction:column;gap:20px;height:fit-content;padding:24px;display:flex}.main-stage{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:14px;flex-direction:column;gap:20px;padding:24px;display:flex}.file-dropzone{border:2px dashed var(--panel-border);text-align:center;cursor:pointer;background:#0f172a66;border-radius:12px;padding:30px 20px;transition:all .2s}.file-dropzone:hover,.file-dropzone.dragover{border-color:var(--accent-color);background:#3b82f61a}.dropzone-icon{margin-bottom:10px;font-size:2.2rem}.wm-preview-container{background:#0006;border-radius:10px;justify-content:center;align-items:center;min-height:350px;padding:15px;display:flex;overflow:hidden}#wm-preview-canvas{object-fit:contain;border-radius:6px;max-width:100%;max-height:450px;box-shadow:0 4px 12px #00000080}.wm-thumb-list{gap:12px;padding-bottom:10px;display:flex;overflow-x:auto}.wm-thumb-card{cursor:pointer;background:#000;border:2px solid #0000;border-radius:8px;flex-shrink:0;width:90px;height:80px;position:relative;overflow:hidden}.wm-thumb-card.active{border-color:var(--accent-color)}.wm-thumb-card img{object-fit:cover;width:100%;height:100%}.wm-thumb-name{white-space:nowrap;text-overflow:ellipsis;background:#000000b3;padding:2px 4px;font-size:.65rem;position:absolute;bottom:0;left:0;right:0;overflow:hidden}.wm-thumb-remove{color:#fff;cursor:pointer;background:#ef4444cc;border:none;border-radius:50%;width:18px;height:18px;font-size:12px;line-height:1;position:absolute;top:2px;right:2px}.form-group{flex-direction:column;gap:6px;display:flex}.form-row{gap:10px;display:flex}.form-row>div{flex:1}label{color:#cbd5e1;font-size:.85rem;font-weight:500}input[type=text],input[type=number],select{background:var(--input-bg);border:1px solid var(--panel-border);color:#fff;border-radius:8px;outline:none;width:100%;padding:9px 12px;font-family:Inter,sans-serif;font-size:.9rem;transition:border-color .2s}input[type=text]:focus,input[type=number]:focus,select:focus{border-color:var(--accent-color)}input[type=range]{width:100%;accent-color:var(--accent-color)}input[type=color]{border:1px solid var(--panel-border);background:var(--input-bg);cursor:pointer;border-radius:6px;height:38px;padding:2px}.btn{cursor:pointer;-webkit-user-select:none;user-select:none;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:10px 18px;font-family:Inter,sans-serif;font-size:.9rem;font-weight:600;transition:all .2s;display:inline-flex}.btn:disabled{opacity:.4;cursor:not-allowed}.primary-btn{background-color:var(--accent-color);color:#fff}.primary-btn:hover:not(:disabled){background-color:var(--accent-hover)}.secondary-btn{color:#fff;background-color:#ffffff1a}.secondary-btn:hover:not(:disabled){background-color:#fff3}.secondary-btn.active{background-color:#ffffff40;box-shadow:inset 0 2px 4px #0003}.danger-btn{background-color:var(--danger-color);color:#fff}.danger-btn:hover:not(:disabled){background-color:var(--danger-hover)}.success-btn{background-color:var(--success-color);color:#fff}.success-btn:hover:not(:disabled){background-color:var(--success-hover)}.small-btn{padding:6px 12px;font-size:.8rem}.data-table{border-collapse:collapse;width:100%;margin-top:10px}.data-table th,.data-table td{text-align:left;border-bottom:1px solid var(--panel-border);padding:12px 14px;font-size:.88rem}.data-table th{color:var(--text-muted);background:#0f172a66;font-weight:600}.badge{border-radius:6px;padding:4px 8px;font-size:.75rem;font-weight:700}.bg-success{color:#34d399;background:#10b98133}.bg-danger{color:#f87171;background:#ef444433}.tab-header{border-bottom:1px solid var(--panel-border);gap:10px;margin-bottom:15px;padding-bottom:10px;display:flex}.tab-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:8px 16px;font-size:.95rem;font-weight:600;transition:all .2s}.tab-btn:hover{color:#fff;background:#ffffff0d}.tab-btn.active{color:#fff;background:#3b82f633}.text-small{font-size:.8rem}.text-muted{color:var(--text-muted)}.mt-2{margin-top:8px}.mt-3{margin-top:14px}.mt-4{margin-top:20px}.canvas-container{background:var(--input-bg);border:1px solid var(--panel-border);border-radius:8px;flex-direction:column;align-items:center;margin-top:10px;padding:10px;display:flex}#draw-canvas{cursor:crosshair;aspect-ratio:1;background:#2a2a2a;border-radius:4px;width:100%}#status-bar{text-align:center;color:#fbbf24;background:#0000004d;border-radius:4px;padding:8px}.modal-overlay{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:9999;background:#000000b3;justify-content:center;align-items:center;width:100%;height:100%;display:none;position:fixed;top:0;left:0}.modal-overlay.show{display:flex}.modal-content{border:1px solid var(--panel-border);background:#1e293bf2;border-radius:14px;flex-direction:column;gap:15px;padding:25px;display:flex;box-shadow:0 25px 50px -12px #00000080}