:root{--bg:#f4f4f4;--paper:#fff;--soft:#f7f7f7;--line:#d8d8d8;--text:#111;--muted:#686868;--black:#050505;--shadow:0 18px 55px rgba(0,0,0,.08);--r:20px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Arial,sans-serif}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.layout{display:grid;grid-template-columns:280px 1fr;min-height:100vh}.side{position:sticky;top:0;height:100vh;background:white;border-right:1px solid var(--line);padding:22px;overflow:auto}.brand{display:flex;align-items:center;gap:12px;font-weight:900;font-size:20px;margin-bottom:24px}.cube{width:36px;height:36px;border:2px solid #111;border-radius:10px;display:grid;place-items:center;font-size:14px}.nav{display:grid;gap:7px}.nav a{padding:11px 12px;border-radius:12px;color:#333}.nav a:hover{background:#f1f1f1}.nav .strong{background:#111;color:white}.main{padding:28px;max-width:1500px;width:100%;margin:0 auto}.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:24px}h1,h2,h3,p{margin-top:0}.muted{color:var(--muted)}.frame{background:white;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--r);padding:24px;margin-bottom:24px}.title{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:20px}.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{border:1px solid var(--line);background:white;border-radius:17px;padding:16px}.btn{border:0;background:#111;color:white;border-radius:12px;padding:11px 16px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn:hover{background:#333}.btn.secondary{background:white;color:#111;border:1px solid var(--line)}.btn.secondary:hover{background:#f1f1f1}.input{width:100%;border:1px solid var(--line);border-radius:12px;padding:11px 12px;background:white;outline:none}.input:focus{border-color:#111}label{font-size:13px;font-weight:800;margin:12px 0 7px;display:block}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.chip{display:inline-flex;align-items:center;border-radius:999px;background:#eee;padding:7px 11px;font-size:12px;font-weight:900}.chip.dark{background:#111;color:white}.flash{border:1px solid #ddd;background:#f4f4f4;border-radius:12px;padding:12px;margin:12px 0}.flash.error{background:#fff;border-color:#aaa}.flash.success{background:#f1f1f1}.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:center;background:linear-gradient(135deg,#fff,#f0f0f0);border:1px solid var(--line);border-radius:26px;padding:34px;margin-bottom:24px}.hero h1{font-size:42px;line-height:1.05}.printer-card{height:260px;border-radius:22px;background:radial-gradient(circle at 50% 35%,#fff,#e8e8e8);border:1px solid #ddd;display:grid;place-items:center}.printer-icon{width:210px;height:150px;position:relative}.printer-icon:before{content:"";position:absolute;left:20px;right:20px;top:10px;height:16px;background:#111;border-radius:10px;box-shadow:0 105px 0 0 #333}.printer-icon .l,.printer-icon .r{position:absolute;top:20px;width:16px;height:120px;background:#222;border-radius:10px}.printer-icon .l{left:25px}.printer-icon .r{right:25px}.printer-icon .head{position:absolute;top:48px;left:78px;width:56px;height:38px;background:#222;border-radius:12px}.printer-icon .object{position:absolute;bottom:34px;left:70px;width:72px;height:42px;background:repeating-linear-gradient(0deg,#777 0 4px,#aaa 4px 8px);border-radius:12px 12px 4px 4px}.spool{height:140px;border-radius:15px;background:radial-gradient(circle,#f8f8f8 0 17%,#cfcfcf 18% 29%,#eee 30% 43%,#c8c8c8 44% 53%,#f7f7f7 54%);border:1px solid #ddd}.model-preview{height:150px;border-radius:15px;background:#f1f1f1;border:1px solid #ddd;display:grid;place-items:center;color:#777}.model-shape{width:96px;height:58px;border:15px solid #777;border-right-color:transparent;border-radius:20px;transform:rotate(-18deg);box-shadow:8px 12px 22px rgba(0,0,0,.16)}table{width:100%;border-collapse:collapse;font-size:14px}th,td{border-bottom:1px solid #eee;padding:12px;text-align:left}th{background:#f3f3f3;color:#555;font-size:12px}.summary{display:flex;justify-content:space-between;gap:14px;border-bottom:1px solid #eee;padding:10px 0}.auth{max-width:560px;margin:auto}.code{display:block;background:#f3f3f3;border-radius:12px;padding:12px;overflow:auto}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:18px}.step{border:1px solid #ddd;border-radius:14px;padding:12px;background:#fafafa}.step b{display:block}footer{color:#777;font-size:12px;margin-top:30px}@media(max-width:1000px){.layout{grid-template-columns:1fr}.side{position:relative;height:auto}.g2,.g3,.g4,.hero{grid-template-columns:1fr}.steps{grid-template-columns:1fr}.main{padding:18px}}