*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:'Inter',sans-serif;
}

body{
  height:100vh;
  display:flex;
  justify-content:center;
  align-items:center;
  background:linear-gradient(135deg,#0f172a,#1e293b);
  overflow:hidden;
  position:relative;
}

body::before{
  content:"";
  position:absolute;
  width:150%;
  height:150%;
  top:-25%;
  left:-25%;
  background:radial-gradient(circle at 30% 30%, rgba(37,99,235,0.25), transparent 40%),
             radial-gradient(circle at 70% 70%, rgba(59,130,246,0.25), transparent 40%);
  animation:rotateGradient 20s linear infinite;
}

@keyframes rotateGradient{
  from{transform:rotate(0);}
  to{transform:rotate(360deg);}
}

.wrapper{
  position:relative;
  z-index:2;
  width:100%;
  max-width:420px;
  padding:20px;
}

.card{
  backdrop-filter:blur(20px);
  background:rgba(255,255,255,.9);
  padding:40px;
  border-radius:16px;
  box-shadow:0 25px 60px rgba(0,0,0,.3);
}

.header{
  text-align:center;
  margin-bottom:25px;
}

.header h2{
  margin-bottom:10px;
}

.header p{
  font-size:14px;
  color:#475569;
}

.input-group{
  margin-bottom:20px;
}

.input-group label{
  font-size:14px;
  display:block;
  margin-bottom:6px;
  font-weight:500;
}

.input-group input{
  width:100%;
  padding:10px;
  border-radius:8px;
  border:1px solid #cbd5e1;
  outline:none;
}

.input-group input:focus{
  border-color:#2563eb;
  box-shadow:0 0 0 3px rgba(37,99,235,.2);
}

.btn{
  width:100%;
  padding:12px;
  border:none;
  border-radius:8px;
  background:#2563eb;
  color:#fff;
  font-weight:600;
  cursor:pointer;
  transition:.3s ease;
}

.btn:hover{
  transform:translateY(-3px);
  box-shadow:0 0 20px rgba(37,99,235,.6);
}

.result{
  margin-top:20px;
  text-align:center;
}