*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f4f7fb;color:#1f2937}
.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:#fff;border:1px solid #dfe6ee;border-radius:16px;padding:24px;box-shadow:0 12px 36px rgba(31,41,55,.08);max-width:980px;width:100%}.narrow{max-width:520px}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;color:#64748b}h1{margin:8px 0 10px}h2{margin-top:0}
label{display:block;font-weight:700;margin:14px 0 6px}input,select,textarea{width:100%;padding:11px 12px;border:1px solid #cbd5e1;border-radius:10px;background:#fff}
.btn{display:inline-block;border:0;border-radius:10px;padding:11px 16px;background:#1e3a5f;color:#fff;text-decoration:none;font-weight:700;cursor:pointer;margin-top:16px}.btn.secondary{background:#e8eef5;color:#1e3a5f}
.alert{padding:12px 14px;border-radius:10px;margin:14px 0}.alert.ok{background:#e9f8ef;border:1px solid #b9e3c8}.alert.error{background:#fff0f0;border:1px solid #efc1c1}
.check{padding:12px;border-radius:10px;margin:8px 0}.check.good{background:#ecfdf3}.check.bad{background:#fff1f2}
.muted{color:#64748b}.small{font-size:13px}.shell{min-height:100vh}.header{display:flex;justify-content:space-between;padding:16px 24px;background:#fff;border-bottom:1px solid #e2e8f0}.content{max-width:1000px;margin:0 auto;padding:24px}
code{background:#eef2f7;padding:2px 5px;border-radius:5px}
@media(max-width:640px){.header{display:block}.header>div+div{margin-top:8px}.content{padding:16px}.card{padding:18px}}