*{box-sizing:border-box}body{margin:0;font:16px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#eef1f6;color:#1c2333}
main{max-width:760px;margin:0 auto;padding:20px}h1{font-size:22px;margin:4px 0}.card{background:#fff;border-radius:16px;padding:18px;margin:14px 0;box-shadow:0 1px 3px #0001}
.muted{color:#667085;font-size:14px}iframe{width:100%;height:60vh;border:1px solid #d0d5dd;border-radius:10px;background:#fafafa}
label{display:block;font-weight:600;margin:10px 0 4px}input[type=text]{width:100%;padding:10px;border:1px solid #d0d5dd;border-radius:10px;font-size:16px}
canvas{width:100%;height:160px;border:1px dashed #98a2b3;border-radius:10px;touch-action:none;background:#fff}.tabs button{border:0;background:#eef1f6;padding:8px 14px;border-radius:999px;margin-right:6px;font-size:14px}
.tabs button.on{background:#1d4ed8;color:#fff}.btn{display:inline-block;border:0;background:#1d4ed8;color:#fff;padding:12px 20px;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;text-decoration:none}
.btn:disabled{opacity:.45}.link{background:none;border:0;color:#1d4ed8;padding:0;font-size:14px;cursor:pointer}.err{color:#b42318}.ok{color:#067647}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:500}.check input{width:20px;height:20px;margin-top:2px}
.hide{display:none}