*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,sans-serif;color:#1d2433;background:#f4f5f7;font-size:15px;line-height:1.55}
header{background:#14213d;color:#fff;padding:12px 16px}
header a{color:#fff;text-decoration:none;font-weight:700;font-size:18px}
main{max-width:760px;margin:0 auto;padding:16px}
h1{font-size:22px;margin:8px 0 12px}
h2{font-size:17px;margin:22px 0 8px}
.card{background:#fff;border:1px solid #e1e4ea;border-radius:10px;padding:14px;margin-bottom:12px}
.ph{background:#fff3cd;padding:0 4px;border-radius:4px}
footer{max-width:760px;margin:0 auto;padding:16px;color:#778;font-size:13px;text-align:center}
footer a{color:#556;margin:0 6px}
label{display:block;font-size:13px;color:#556;margin:10px 0 4px}
input,select,textarea{font-size:16px;padding:10px;border:1px solid #c8ccd6;border-radius:8px;width:100%;background:#fff;font-family:inherit}
.chk{display:flex;gap:8px;align-items:flex-start;margin-top:12px;font-size:14px}.chk input{width:auto;margin-top:4px}
.big{display:block;width:100%;padding:12px;border-radius:10px;border:0;background:#14213d;color:#fff;font-size:16px;margin-top:14px}
#err{width:100%;height:90px;font-family:monospace;font-size:12px;background:#fff8f7;border:1px solid #f1b5ae;border-radius:8px;padding:8px;display:none;margin-bottom:10px}
.ok{background:#e8f4ea;border:1px solid #b9dfc1;border-radius:8px;padding:12px}