:root{font-family:system-ui,sans-serif;color:#253c59;background:#eef4fa;color-scheme:light}*{box-sizing:border-box}body{margin:0}header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 24px;background:white;border-bottom:1px solid #dbe6f2}h1{font-size:20px;margin:0}header p{font-size:12px;color:#64829e;margin:5px 0 0}nav{display:flex;gap:8px;flex-wrap:wrap}a{color:#1267b5;text-decoration:none}nav a,.standalone{border:1px solid #ccdded;padding:9px 13px;border-radius:10px;background:#f0f7ff;font-size:13px}nav a[aria-current=page]{background:#086cdd;color:white;border-color:#086cdd}.frame-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 24px;font-size:12px;color:#64829e}.standalone{white-space:nowrap}iframe{display:block;width:calc(100% - 32px);height:calc(100dvh - 154px);min-height:480px;margin:0 16px 16px;border:1px solid #dbe6f2;border-radius:14px;background:white}.landing{max-width:1100px;margin:40px auto;padding:0 20px}.landing h2{margin:0 0 8px}.landing p{color:#64829e;line-height:1.7}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:24px}.card{background:white;border:1px solid #dbe6f2;border-radius:16px;padding:24px;box-shadow:0 5px 20px #183b6410}.card strong{display:block;font-size:18px;margin-bottom:12px}.card span{display:inline-block;background:#086cdd;color:white;padding:10px 16px;border-radius:10px;font-size:13px}@media(max-width:720px){header{align-items:flex-start;flex-direction:column;padding:14px 16px;gap:12px}nav{width:100%}nav a{flex:1;text-align:center;padding:8px;font-size:12px}.frame-tools{padding:10px 16px;align-items:flex-start}iframe{width:calc(100% - 16px);margin:0 8px 8px;height:calc(100dvh - 195px);min-height:480px}.cards{grid-template-columns:1fr}.landing{margin-top:24px}}