:root{--bg:#f8fafc;--surface:rgba(255,255,255,0.85);--surface-hover:rgba(255,255,255,1);--surface-solid:#ffffff;--ink:#0f172a;--muted:#64748b;--line:rgba(148,163,184,0.2);--line-strong:rgba(148,163,184,0.4);--accent:#2563eb;--accent-glow:rgba(37,99,235,0.3);--accent-2:#8b5cf6;--shadow:0 20px 40px -15px rgba(15,23,42,0.08);--glass-shadow:0 8px 32px 0 rgba(15,23,42,0.04);--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background-color:var(--bg);background-image:radial-gradient(circle at 15% 50%,rgba(37,99,235,.06),transparent 25%),radial-gradient(circle at 85% 30%,rgba(139,92,246,.06),transparent 25%),linear-gradient(to bottom right,#f8fafc,#f1f5f9);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;letter-spacing:-.01em;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a,button,input,select{transition:all .25s cubic-bezier(.4,0,.2,1)}button,input,select{font:inherit}.site-shell{min-height:100vh;display:flex;flex-direction:column}.glass{background:var(--surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--line);box-shadow:var(--glass-shadow)}.glass:hover{border-color:var(--line-strong);background:var(--surface-hover)}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:rgba(255,255,255,.75);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid var(--line)}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;width:min(1180px,calc(100% - 32px));margin:0 auto;padding:16px 0}.brand{display:inline-flex;align-items:center;gap:12px;font-weight:800;font-size:1.15rem;letter-spacing:-.03em;color:#1e293b}.brand-mark{display:grid;width:38px;height:38px;place-items:center;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:white;box-shadow:0 4px 14px var(--accent-glow)}.brand-mark svg{height:22px;width:22px}.brand-mark path{fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8}.nav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.nav a{border-radius:10px;color:var(--muted);font-size:14px;font-weight:600;padding:8px 14px}.nav a:hover{background:rgba(15,23,42,.04);color:var(--ink)}.nav a.active,.nav a[aria-current=page]{background:rgba(37,99,235,.1);color:var(--accent);box-shadow:inset 0 0 0 1px rgba(37,99,235,.18)}.hero{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:70px 0 50px;transition:all .4s cubic-bezier(.4,0,.2,1)}.hero.studio-active{width:min(1340px,calc(100% - 32px));padding-top:40px;padding-bottom:40px}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(440px,1.15fr);grid-gap:50px;gap:50px;align-items:center;transition:all .4s cubic-bezier(.4,0,.2,1)}.hero-grid.studio-active{grid-template-columns:1fr;gap:0}.hero.studio-active .hero-copy{display:none}.hero-copy{display:flex;flex-direction:column;justify-content:center;padding:20px 0}.eyebrow{align-items:center;color:var(--accent);display:inline-flex;font-size:13px;font-weight:700;gap:8px;margin-bottom:24px;text-transform:uppercase;letter-spacing:.12em;background:rgba(37,99,235,.08);padding:6px 14px;border-radius:20px;border:1px solid rgba(37,99,235,.15);width:-moz-fit-content;width:fit-content}h1{font-size:clamp(48px,6.5vw,76px);letter-spacing:-.04em;line-height:1.05;margin:0 0 24px;font-weight:900;color:#0f172a}.lead{color:var(--muted);font-size:1.25rem;line-height:1.7;margin:0;max-width:580px;font-weight:400}.quick-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:40px}.quick-links a{align-items:center;background:var(--surface-solid);border:1px solid var(--line);border-radius:24px;color:var(--ink);display:inline-flex;font-size:14px;font-weight:600;gap:8px;padding:10px 20px;box-shadow:0 2px 8px rgba(15,23,42,.02)}.quick-links a:hover{border-color:var(--accent);background:#f8fafc;color:var(--accent);transform:translateY(-2px);box-shadow:0 6px 16px rgba(37,99,235,.1)}.tool-panel{background:var(--surface-solid);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:all .4s cubic-bezier(.4,0,.2,1)}.tool-panel.upload-only{max-width:480px;margin:0 auto;width:100%}.tool-toolbar{align-items:center;background:#f8fafc;border-bottom:1px solid var(--line);color:var(--ink);display:flex;justify-content:space-between;gap:16px;padding:18px 24px}.tool-toolbar strong{display:block;font-size:16px;font-weight:700}.tool-toolbar span{color:var(--muted);display:block;font-size:13px;margin-top:4px}.status-pill{align-items:center;background:rgba(37,99,235,.08);border:1px solid rgba(37,99,235,.2);border-radius:999px;color:var(--accent);display:inline-flex;font-size:12px;font-weight:700;gap:6px;padding:6px 14px;white-space:nowrap}.tool-body{display:grid;grid-template-columns:1fr 1fr;grid-gap:0;gap:0;flex:1 1}.tool-body.upload-only{grid-template-columns:1fr}.tool-panel.studio-active .tool-body{grid-template-columns:380px 1fr}.tool-panel.studio-active .stl-preview-canvas{height:540px;min-height:480px}.tool-controls{border-right:1px solid var(--line);padding:28px;background:#ffffff}.tool-controls.upload-only{border-right:none}.dropzone{align-items:center;background:#f8fafc;border:2px dashed var(--line-strong);border-radius:12px;color:var(--muted);cursor:pointer;display:flex;flex-direction:column;gap:16px;min-height:180px;justify-content:center;padding:36px 24px;text-align:center;transition:all .3s ease}.dropzone:hover{background:#f0fdf4;border-color:#22c55e;box-shadow:0 0 24px rgba(34,197,94,.1)}.dropzone input{display:none}.dropzone.has-preview{padding:16px;min-height:auto;background:#ffffff;border-style:solid;border-color:var(--line)}.dropzone-thumb{max-width:100%;max-height:160px;object-fit:contain;border-radius:8px;background:linear-gradient(45deg,#e2e8f0 25%,transparent 0),linear-gradient(-45deg,#e2e8f0 25%,transparent 0),linear-gradient(45deg,transparent 75%,#e2e8f0 0),linear-gradient(-45deg,transparent 75%,#e2e8f0 0);background-size:12px 12px;background-position:0 0,0 6px,6px -6px,-6px 0}.dropzone-name{font-size:13px;font-weight:600;color:var(--muted);margin-top:4px;overflow-wrap:anywhere;text-align:center}.drop-icon{align-items:center;background:rgba(34,197,94,.1);border-radius:50%;color:#16a34a;display:flex;height:60px;justify-content:center;width:60px;transition:transform .3s ease}.dropzone:hover .drop-icon{transform:scale(1.1) translateY(-2px);background:rgba(34,197,94,.15)}.dropzone strong{color:var(--ink);display:block;font-size:16px;font-weight:700;margin-bottom:4px;max-width:100%;overflow-wrap:anywhere}.file-note{font-size:13px}.form-stack{display:grid;grid-gap:22px;gap:22px;margin-top:28px}.control{display:grid;grid-gap:12px;gap:12px}.control label{align-items:center;color:var(--ink);display:flex;font-size:14px;font-weight:700;justify-content:space-between}.control label span{color:var(--muted);font-weight:500;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;background:#f1f5f9;padding:4px 8px;border-radius:6px;font-size:13px}.control input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;cursor:pointer;width:100%}.control input[type=range]::-webkit-slider-runnable-track{background:#e2e8f0;border-radius:6px;height:6px}.control input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;background:var(--surface-solid);border:2px solid var(--accent);border-radius:50%;box-shadow:0 2px 6px rgba(37,99,235,.2);height:20px;margin-top:-7px;width:20px;-webkit-transition:transform .15s,box-shadow .15s;transition:transform .15s,box-shadow .15s}.control input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2);box-shadow:0 4px 10px rgba(37,99,235,.3)}.segmented{background:#f1f5f9;border:1px solid var(--line);border-radius:10px;display:grid;grid-template-columns:repeat(3,1fr);padding:4px}.segmented-four{grid-template-columns:repeat(4,1fr)}.segmented button{background:transparent;border:0;border-radius:8px;color:var(--muted);cursor:pointer;font-weight:600;font-size:13px;min-height:38px}.segmented button.active{background:var(--surface-solid);border:1px solid rgba(15,23,42,.05);box-shadow:0 2px 8px rgba(15,23,42,.06);color:var(--accent)}.toggle-row{align-items:center;display:flex;justify-content:space-between;gap:12px;cursor:pointer;padding:6px 0}.toggle-row span{color:var(--ink);font-size:14px;font-weight:600}.toggle-row input{accent-color:var(--accent);height:20px;width:20px;cursor:pointer}.action-row{display:grid;grid-gap:12px;gap:12px;grid-template-columns:1fr 54px;margin-top:28px}.icon-btn,.primary-btn{align-items:center;border:0;border-radius:12px;cursor:pointer;display:inline-flex;font-weight:700;gap:10px;justify-content:center;min-height:54px;font-size:15px}.primary-btn{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(37,99,235,.25)}.primary-btn:hover:not(:disabled){background:#1d4ed8;box-shadow:0 10px 24px rgba(37,99,235,.35);transform:translateY(-1px)}.primary-btn:disabled{background:#cbd5e1;color:#64748b;box-shadow:none;cursor:not-allowed}.icon-btn{background:#f1f5f9;border:1px solid transparent;color:var(--ink)}.icon-btn:hover{background:#e2e8f0;color:var(--accent)}.preview{background:#d7efff;display:flex;flex-direction:column;position:relative;overflow:hidden}.preview:before{content:none}.preview-stage{align-items:center;display:flex;flex:1 1;justify-content:center;padding:32px;position:relative;z-index:1}.stl-preview-canvas{height:min(400px,100%);min-height:320px;width:100%}.stl-preview-canvas canvas{border-radius:var(--radius);cursor:-webkit-grab;cursor:grab;display:block;height:100%!important;width:100%!important;outline:none}.stl-preview-canvas canvas:active{cursor:-webkit-grabbing;cursor:grabbing}.model-mock{aspect-ratio:1.35;background:linear-gradient(135deg,rgba(37,99,235,.08),rgba(139,92,246,.08));border:1px solid rgba(255,255,255,.8);border-radius:16px;box-shadow:0 30px 60px rgba(15,23,42,.1);position:relative;transform:perspective(1000px) rotateX(60deg) rotate(-40deg);width:min(320px,80%);transition:transform 1s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.model-mock:hover{transform:perspective(1000px) rotateX(55deg) rotate(-35deg) translateY(-10px)}.model-mock:after,.model-mock:before{content:"";position:absolute}.model-mock:before{background:rgba(255,255,255,.6);border:1px solid rgba(255,255,255,1);border-radius:10px;height:45%;left:20%;top:20%;transform:translateZ(24px);width:60%;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 10px 20px rgba(15,23,42,.05)}.model-mock:after{border-bottom:40px solid rgba(139,92,246,.5);border-left:30px solid transparent;border-right:30px solid transparent;height:0;left:40%;top:30%;transform:translateZ(40px) rotateX(90deg);transform-origin:bottom;width:0;filter:drop-shadow(0 10px 10px rgba(139,92,246,.2))}.preview-footer{align-items:center;background:rgba(255,255,255,.6);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--line);color:var(--muted);display:flex;font-size:13px;justify-content:space-between;gap:16px;padding:16px 24px;z-index:1}.preview-footer strong{color:var(--ink)}.download-link{align-items:center;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;color:#16a34a;display:inline-flex;font-weight:700;gap:8px;padding:10px 18px;max-width:100%;overflow-wrap:anywhere}.download-link:hover{background:#16a34a;color:#fff;border-color:#16a34a;box-shadow:0 4px 12px rgba(22,163,74,.2)}.tool-message{background:#f0fdfa;border:1px solid #ccfbf1;border-radius:var(--radius);color:#0f766e;font-size:14px;font-weight:500;line-height:1.6;margin:20px 0 0;padding:14px 18px}.tool-message.error{background:#fef2f2;border-color:#fee2e2;color:#b91c1c}.content-band{padding:90px 0;position:relative}.content-band:nth-child(2n){background:#ffffff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.content-inner{width:min(1180px,calc(100% - 32px));margin:0 auto}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:48px}.section-head h2{font-size:40px;letter-spacing:-.03em;margin:0;font-weight:800;color:#0f172a}.section-head p{color:var(--muted);line-height:1.7;margin:0;max-width:540px;font-size:1.15rem}.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--glass-shadow);transition:all .3s cubic-bezier(.4,0,.2,1)}.card:hover{background:var(--surface-hover);border-color:var(--line-strong);transform:translateY(-6px);box-shadow:0 20px 40px -10px rgba(15,23,42,.08)}.steps{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:20px;gap:20px}.step{padding:28px}.step span{color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;margin-bottom:24px;background:rgba(37,99,235,.1);width:36px;height:36px;border-radius:50%;border:1px solid rgba(37,99,235,.2)}.step strong{display:block;font-size:17px;line-height:1.5;color:var(--ink);font-weight:700}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:24px;gap:24px}.info-card h3{font-size:19px;margin:20px 0 12px;color:var(--ink);font-weight:800}.info-card p{color:var(--muted);line-height:1.7;margin:0}.info-card svg{color:var(--accent-2)}.faq-list{display:grid;grid-gap:20px;gap:20px}.faq-item{padding:24px 28px}.faq-item strong{display:block;font-size:17px;margin-bottom:10px;color:var(--ink);font-weight:700}.faq-item p{color:var(--muted);line-height:1.7;margin:0}.converter-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:20px;gap:20px}.converter-link{align-items:center;display:flex;justify-content:space-between;min-height:70px;padding:0 24px;font-weight:600;font-size:15px}.converter-link:hover{color:var(--accent)}.converter-link:hover svg{transform:translateX(6px)}.footer{border-top:1px solid var(--line);color:var(--muted);font-size:15px;padding:48px 0;text-align:center;flex-direction:column;background:#ffffff}.footer,.footer-brand,.footer-links{display:flex;align-items:center;justify-content:center;gap:10px}.footer-brand,.footer-links{flex-wrap:wrap}.footer-links{gap:18px}.footer-links a{color:var(--ink);font-size:14px;font-weight:700}.footer-links a:hover{color:var(--accent)}.legal-main{width:min(860px,calc(100% - 32px));margin:0 auto;padding:72px 0 80px}.legal-main h1{color:var(--ink);font-size:clamp(42px,7vw,72px);letter-spacing:-.04em;line-height:.95;margin:0 0 18px}.legal-updated{color:var(--muted);font-size:15px;margin:0 0 34px}.legal-section{border-top:1px solid var(--line);padding:28px 0}.legal-section h2{color:var(--ink);font-size:24px;margin:0 0 14px}.legal-section li,.legal-section p{color:var(--muted);font-size:16px;line-height:1.75}.legal-section ul{margin:12px 0 0;padding-left:22px}.legal-section a{color:var(--accent);font-weight:700}@media (max-width:1040px){.hero-grid,.tool-body{grid-template-columns:1fr}.tool-controls{border-right:0;border-bottom:1px solid var(--line)}.converter-grid,.steps{grid-template-columns:repeat(2,1fr)}.info-grid{grid-template-columns:1fr}}@media (max-width:680px){.section-head,.topbar-inner{align-items:flex-start;flex-direction:column;gap:16px}.nav{justify-content:flex-start}h1{font-size:42px}.hero{padding-top:40px}.converter-grid,.steps{grid-template-columns:1fr}.preview-footer{align-items:flex-start;flex-direction:column}}