body{margin:0;font-family:Arial,sans-serif;background:#f5f5f5;color:#111}
.container{max-width:1000px;margin:0 auto;padding:20px}
.site-header{background:#0b74df;color:#fff;padding:18px;display:flex;justify-content:space-between;align-items:center}
.logo{font-weight:bold;font-size:1.5em}
.main-nav a{color:#fff;text-decoration:none;margin-right:15px;font-weight:bold}
.main-nav a:hover{text-decoration:underline}
.intro, .radio{background:#fff;padding:20px;margin:20px 0;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,0.06)}
.btn{background:#0b74df;color:#fff;padding:8px 12px;border-radius:6px;text-decoration:none}
iframe{margin-top:10px}