*{margin:0;padding:0;box-sizing:border-box}
body{font-family:Arial;background:#0b1220;color:#e5e7eb}
header{background:#0f172a;padding:20px 40px;display:flex;justify-content:space-between}
header h1{color:#38bdf8}
nav a{color:#cbd5e1;margin-left:20px;text-decoration:none}
.section{padding:60px 40px}
input,textarea{width:100%;padding:12px;margin:10px 0;border-radius:6px;border:none}
button{padding:12px 25px;background:#38bdf8;border:none;border-radius:6px;font-weight:bold;cursor:pointer}
#result{margin-top:15px;color:#38bdf8}
footer{background:#0f172a;padding:30px 40px;margin-top:60px;color:#94a3b8}