body{font-family:Arial,Helvetica,sans-serif;margin:0;background:#f5f7fa;color:#333;line-height:1.6;}
header{background:#2c3e50;color:#fff;padding:20px;text-align:center;position:sticky;top:0;z-index:1000;}
nav{background:#34495e;display:flex;flex-wrap:wrap;justify-content:center;gap:20px;padding:10px;position:sticky;top:60px;z-index:999;}
nav a{color:#ecf0f1;text-decoration:none;font-weight:bold;}
section{padding:40px 20px;max-width:1000px;margin:auto;}
.card{background:#fff;border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,.1);padding:20px;margin-bottom:20px;}
label{font-weight:bold;display:block;margin-top:15px;}
textarea{width:100%;min-height:110px;border:1px solid #ccc;border-radius:4px;padding:8px;}
button.primary{background:#2980b9;color:#fff;border:none;border-radius:4px;padding:10px 16px;margin-right:10px;margin-top:10px;cursor:pointer;}
details summary{cursor:pointer;font-weight:bold;}
input[type=email]{padding:8px;border:1px solid #ccc;border-radius:4px;width:230px;margin-right:8px;}