body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;background-color:#f4f7f6;color:#333;margin:0;padding:20px;display:flex;justify-content:center;align-items:center;min-height:100vh}.container{background-color:#fff;padding:30px 40px;border-radius:8px;box-shadow:0 4px 12px #0000001a;max-width:600px;width:100%;text-align:center}h1{display:flex;align-items:center;justify-content:center;color:#e62117;margin-bottom:20px}.header-icon{width:40px;height:auto;margin-right:10px}p{color:#555;margin-bottom:25px}#channel-form{display:flex;flex-direction:column;gap:15px;margin-bottom:25px}input[type=url]{padding:12px 15px;border:1px solid #ccc;border-radius:4px;font-size:1rem}button{padding:12px 20px;background-color:#e62117;color:#fff;border:none;border-radius:4px;font-size:1rem;cursor:pointer;transition:background-color .3s ease}button:hover{background-color:#c41610}#result-area{margin-top:20px;font-size:1.1rem;word-wrap:break-word}#result{color:#28a745;font-weight:700}#error{color:#dc3545;font-weight:700}