:root{--t3d-bg: #090d16;--t3d-surface: #0f172a;--t3d-surface-glass: rgba(15, 23, 42, .88);--t3d-border: rgba(148, 163, 184, .15);--t3d-border-bright: rgba(6, 182, 212, .4);--t3d-cyan: #06b6d4;--t3d-cyan-hover: #22d3ee;--t3d-cyan-glow: rgba(6, 182, 212, .25);--t3d-teal: #14b8a6;--t3d-blue: #3b82f6;--t3d-amber: #f59e0b;--t3d-emerald: #10b981;--t3d-text: #f8fafc;--t3d-text-muted: #94a3b8;--t3d-text-dim: #64748b;--t3d-radius: 10px;--t3d-radius-sm: 6px}.t3d-hero{background:radial-gradient(circle at 50% -20%,rgba(6,182,212,.18),transparent 70%),linear-gradient(180deg,#090d16,#0c1220);border-bottom:1px solid var(--t3d-border);padding:40px 20px 30px;margin-top:140px;text-align:center;position:relative;overflow:hidden}.t3d-hero-badge{display:inline-flex;align-items:center;gap:8px;background:#06b6d41f;border:1px solid var(--t3d-border-bright);padding:6px 14px;border-radius:20px;font-size:.8rem;font-weight:700;color:var(--t3d-cyan);text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px}.t3d-hero-title{font-family:Oswald,Inter,sans-serif;font-size:2.4rem;font-weight:700;color:var(--t3d-text);margin:0 0 10px;letter-spacing:.02em}.t3d-hero-title span{background:linear-gradient(135deg,var(--t3d-cyan),#38bdf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.t3d-hero-desc{font-size:1.05rem;color:var(--t3d-text-muted);max-width:820px;margin:0 auto 20px;line-height:1.6}.t3d-formats-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:15px}.t3d-format-pill{background:#1e293bb3;border:1px solid var(--t3d-border);padding:4px 10px;border-radius:6px;font-size:.75rem;font-weight:600;color:#cbd5e1;font-family:JetBrains Mono,monospace}.t3d-format-pill.highlight{border-color:var(--t3d-cyan);color:var(--t3d-cyan);background:#06b6d41a}.t3d-app-layout{max-width:1540px;margin:0 auto;padding:20px;display:flex;flex-direction:column;gap:16px}.t3d-dropzone-card{background:var(--t3d-surface-glass);backdrop-filter:blur(12px);border:2px dashed var(--t3d-border);border-radius:var(--t3d-radius);padding:24px 20px;text-align:center;cursor:pointer;transition:all .25s ease;position:relative}.t3d-dropzone-card:hover,.t3d-dropzone-card.dragover{border-color:var(--t3d-cyan);background:#06b6d40d;box-shadow:0 0 25px var(--t3d-cyan-glow)}.t3d-dropzone-card.has-file{padding:14px 20px;border-style:solid;border-color:#10b98166;background:#10b9810d}.t3d-dropzone-card.has-file .t3d-drop-initial{display:none!important}.t3d-dropzone-card.has-file #t3d-file-banner{display:flex!important}.t3d-drop-icon{font-size:2.2rem;color:var(--t3d-cyan);margin-bottom:8px}.t3d-drop-text{font-size:1rem;font-weight:600;color:var(--t3d-text);margin-bottom:4px}.t3d-drop-subtext{font-size:.8rem;color:var(--t3d-text-dim);margin-bottom:14px}.t3d-samples-row{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:10px}.t3d-btn-sample{background:#1e293b;border:1px solid var(--t3d-border);color:var(--t3d-text);padding:6px 14px;border-radius:6px;font-size:.8rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .2s}.t3d-btn-sample:hover{border-color:var(--t3d-cyan);color:var(--t3d-cyan);background:#06b6d41a}#t3d-file-banner{display:none;align-items:center;justify-content:space-between;gap:15px}.t3d-file-info{display:flex;align-items:center;gap:12px;text-align:left}.t3d-file-icon{font-size:1.8rem;color:var(--t3d-emerald)}.t3d-file-name{font-size:.95rem;font-weight:700;color:var(--t3d-text)}.t3d-file-meta{font-size:.75rem;color:var(--t3d-text-muted)}.t3d-ribbon{background:var(--t3d-surface-glass);backdrop-filter:blur(12px);border:1px solid var(--t3d-border);border-radius:var(--t3d-radius);padding:10px 14px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}.t3d-ribbon-groups{display:flex;flex-wrap:wrap;align-items:center;gap:14px}.t3d-ribbon-group{display:flex;align-items:center;gap:6px;background:#1e293b80;border:1px solid var(--t3d-border);padding:4px 8px;border-radius:var(--t3d-radius-sm)}.t3d-group-label{font-size:.7rem;font-weight:700;color:var(--t3d-text-dim);text-transform:uppercase;margin-right:4px}.t3d-btn-tool{background:transparent;border:1px solid transparent;color:var(--t3d-text-muted);padding:6px 10px;border-radius:4px;font-size:.8rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .2s}.t3d-btn-tool:hover{background:#ffffff0f;color:var(--t3d-text)}.t3d-btn-tool.active{background:#06b6d42e;border-color:var(--t3d-cyan);color:var(--t3d-cyan)}.t3d-btn-primary{background:linear-gradient(135deg,var(--t3d-cyan),#0284c7);border:none;color:#fff;padding:8px 16px;border-radius:6px;font-size:.85rem;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:8px;box-shadow:0 4px 12px var(--t3d-cyan-glow);transition:all .2s}.t3d-btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 16px #06b6d466}.t3d-main-stage{display:grid;grid-template-columns:1fr 340px;gap:16px;min-height:640px}@media(max-width:1024px){.t3d-main-stage{grid-template-columns:1fr}}.t3d-viewport-container{background:#090d16;border:1px solid var(--t3d-border);border-radius:var(--t3d-radius);position:relative;overflow:hidden;min-height:600px}#t3d-viewport{width:100%;height:100%;position:absolute;top:0;left:0}.t3d-hud-sidebar{background:var(--t3d-surface-glass);backdrop-filter:blur(12px);border:1px solid var(--t3d-border);border-radius:var(--t3d-radius);padding:18px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;max-height:640px}.t3d-hud-block{border-bottom:1px solid var(--t3d-border);padding-bottom:14px}.t3d-hud-block:last-child{border-bottom:none;padding-bottom:0}.t3d-hud-title{font-family:Oswald,sans-serif;font-size:.95rem;font-weight:700;color:var(--t3d-text);margin-bottom:10px;display:flex;align-items:center;gap:8px}.t3d-hud-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.t3d-hud-card{background:#1e293b99;border:1px solid var(--t3d-border);border-radius:6px;padding:8px 10px}.t3d-hud-card-label{font-size:.7rem;color:var(--t3d-text-dim);text-transform:uppercase;font-weight:700}.t3d-hud-card-val{font-size:.95rem;font-weight:700;color:var(--t3d-cyan);font-family:JetBrains Mono,monospace;margin-top:2px}.t3d-measure-item{background:#1e293bb3;border-left:3px solid var(--t3d-cyan);border-radius:4px;padding:8px 10px;margin-bottom:8px}.t3d-measure-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.t3d-measure-tag{font-size:.75rem;font-weight:700;color:var(--t3d-text)}.t3d-measure-val{font-size:.85rem;font-weight:700;color:var(--t3d-cyan);font-family:JetBrains Mono,monospace}.t3d-measure-details{display:flex;gap:10px;font-size:.7rem;color:var(--t3d-text-muted);font-family:JetBrains Mono,monospace}.t3d-empty-msg{font-size:.8rem;color:var(--t3d-text-dim);text-align:center;padding:16px 0}.t3d-clip-panel{position:absolute;bottom:20px;left:20px;background:#0f172aeb;backdrop-filter:blur(14px);border:1px solid var(--t3d-border-bright);border-radius:var(--t3d-radius);padding:14px 18px;width:320px;box-shadow:0 8px 24px #00000080;display:none;z-index:20}.t3d-clip-panel.active{display:block}.t3d-clip-row{display:flex;align-items:center;gap:10px;margin-bottom:10px}.t3d-clip-row:last-child{margin-bottom:0}.t3d-clip-axis{font-weight:700;font-size:.8rem;width:50px;color:var(--t3d-cyan)}.t3d-clip-slider{flex:1;accent-color:var(--t3d-cyan);cursor:pointer}.t3d-clip-val{font-size:.75rem;width:40px;text-align:right;font-family:JetBrains Mono,monospace;color:var(--t3d-text-muted)}.t3d-loading-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#090d16d9;backdrop-filter:blur(8px);display:none;flex-direction:column;align-items:center;justify-content:center;z-index:50}.t3d-spinner{width:44px;height:44px;border:3px solid rgba(6,182,212,.2);border-top-color:var(--t3d-cyan);border-radius:50%;animation:t3d-spin .8s linear infinite;margin-bottom:12px}.t3d-progress-container{width:220px;height:6px;background:#1e293bcc;border-radius:3px;overflow:hidden;margin-top:10px}.t3d-progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--t3d-cyan),#38bdf8);transition:width .2s ease}@keyframes t3d-spin{to{transform:rotate(360deg)}}.t3d-tree-section{background:var(--t3d-surface-glass);backdrop-filter:blur(12px);border:1px solid var(--t3d-border);border-radius:var(--t3d-radius);padding:16px 20px;display:flex;flex-direction:column;gap:14px}.t3d-tree-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--t3d-border);padding-bottom:12px}.t3d-tree-title{font-family:Oswald,sans-serif;font-size:1.05rem;font-weight:700;color:var(--t3d-text);display:flex;align-items:center;gap:10px}.t3d-tree-count-badge{background:#06b6d426;border:1px solid var(--t3d-border-bright);color:var(--t3d-cyan);padding:2px 8px;border-radius:12px;font-size:.75rem;font-family:Inter,sans-serif;font-weight:600}.t3d-tree-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.t3d-btn-tree-tool{background:#1e293bb3;border:1px solid var(--t3d-border);color:var(--t3d-text-muted);padding:5px 12px;border-radius:6px;font-size:.78rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:all .2s}.t3d-btn-tree-tool:hover{border-color:var(--t3d-cyan);color:var(--t3d-cyan);background:#06b6d41a}.t3d-tree-content{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px;max-height:380px;overflow-y:auto;padding-right:4px}.t3d-tree-empty{grid-column:1 / -1;text-align:center;color:var(--t3d-text-dim);font-size:.85rem;padding:24px;font-style:italic}.t3d-tree-card{background:#0f172abf;border:1px solid var(--t3d-border);border-radius:8px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px;transition:all .2s}.t3d-tree-card:hover{border-color:var(--t3d-border-bright);background:#0f172af2;transform:translateY(-1px)}.t3d-tree-card.is-hidden{opacity:.45;border-style:dashed}.t3d-tree-card.is-selected{border-color:var(--t3d-cyan);box-shadow:0 0 10px var(--t3d-cyan-glow)}.t3d-tree-info{display:flex;align-items:center;gap:10px;flex:1;min-width:0}.t3d-tree-color-dot{width:12px;height:12px;border-radius:50%;flex-shrink:0;box-shadow:0 0 6px #00000080;border:1px solid rgba(255,255,255,.2)}.t3d-tree-details{display:flex;flex-direction:column;min-width:0}.t3d-tree-name{font-size:.85rem;font-weight:700;color:var(--t3d-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.t3d-tree-meta{font-size:.72rem;color:var(--t3d-text-dim);font-family:JetBrains Mono,monospace}.t3d-tree-card-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}.t3d-tree-action-btn{background:#1e293bcc;border:1px solid var(--t3d-border);color:var(--t3d-text-muted);width:28px;height:28px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:.75rem;cursor:pointer;transition:all .15s}.t3d-tree-action-btn:hover{color:var(--t3d-cyan);border-color:var(--t3d-cyan)}.t3d-tree-action-btn.active{color:#090d16;background:var(--t3d-cyan);border-color:var(--t3d-cyan)}.t3d-measure-item{background:#0f172ab3;border:1px solid var(--t3d-border);border-radius:6px;padding:8px 10px;margin-bottom:8px;position:relative}.t3d-measure-item:hover{border-color:var(--t3d-border-bright)}.t3d-measure-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.t3d-measure-tag{font-size:.72rem;font-weight:700;color:var(--t3d-cyan)}.t3d-measure-val{font-family:JetBrains Mono,monospace;font-weight:700;font-size:.85rem;color:#38bdf8}.t3d-measure-details{display:flex;flex-wrap:wrap;gap:8px;font-size:.7rem;color:var(--t3d-text-dim);font-family:JetBrains Mono,monospace}.t3d-measure-del-btn{background:transparent;border:none;color:var(--t3d-text-dim);cursor:pointer;padding:2px 4px;font-size:.75rem;transition:color .15s}.t3d-measure-del-btn:hover{color:#ef4444}