*{margin:0;padding:0;box-sizing:border-box;}
body{background:#0a0a0f;color:#e2e8f0;font-family:'Segoe UI',sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;}
.card{background:#0f172a;border:1px solid #334155;border-radius:20px;padding:48px 44px;width:100%;max-width:460px;box-shadow:0 30px 80px rgba(0,0,0,.6);}
.logo{text-align:center;margin-bottom:32px;}
.logo i{font-size:48px;color:#38bdf8;filter:drop-shadow(0 0 16px #38bdf840);}
.logo h1{color:#38bdf8;font-size:22px;margin-top:10px;font-weight:800;}
.logo p{color:#64748b;font-size:14px;margin-top:6px;}
.features{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:28px;}
.feat{background:#1e293b;border-radius:10px;padding:10px 14px;font-size:13px;display:flex;align-items:center;gap:8px;color:#94a3b8;}
.feat i{color:#38bdf8;}
label{color:#64748b;font-size:11px;font-weight:700;display:block;margin-bottom:5px;text-transform:uppercase;margin-top:14px;}
input{width:100%;background:#1e293b;border:1px solid #334155;color:#e2e8f0;padding:11px 14px;border-radius:10px;font-size:14px;outline:none;transition:border .2s;}
input:focus{border-color:#38bdf8;}
.btn{width:100%;background:#38bdf8;color:#0a0a0f;border:none;border-radius:12px;padding:14px;font-weight:800;font-size:15px;cursor:pointer;margin-top:20px;transition:opacity .15s;display:flex;align-items:center;justify-content:center;gap:8px;}
.btn:hover{opacity:.9;}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.result{display:none;background:#1e293b;border:1px solid #334155;border-radius:14px;padding:20px;margin-top:20px;text-align:center;}
.key-box{background:#0a0a0f;border:1px solid #38bdf840;border-radius:10px;padding:14px;font-family:monospace;font-size:15px;color:#38bdf8;letter-spacing:1px;margin:12px 0;word-break:break-all;}
.copy-btn{background:#38bdf820;border:1px solid #38bdf840;color:#38bdf8;border-radius:8px;padding:8px 16px;cursor:pointer;font-weight:700;font-size:13px;}
.note{font-size:12px;color:#64748b;margin-top:10px;line-height:1.6;}