*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:#1f2937;background:#f8fafc;line-height:1.65}
header{background:#0f172a;color:#fff}header .w{display:flex;justify-content:space-between;align-items:center;padding:18px 24px}
header a{color:#cbd5e1;text-decoration:none;margin-left:18px}header a:hover{color:#fff}.brand{font-weight:700;font-size:1.25rem;color:#fff;margin:0}
.w{max-width:860px;margin:0 auto}main .w{padding:40px 24px}.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:32px 36px}
h1{margin-top:0;font-size:2rem}h2{font-size:1.2rem;margin-top:1.8em}a{color:#2563eb}.muted{color:#64748b}
.btn{display:inline-block;background:#2563eb;color:#fff!important;padding:10px 18px;border-radius:8px;text-decoration:none;margin:6px 8px 0 0}
footer{color:#64748b;font-size:.9rem;text-align:center;padding:24px}