*{
    box-sizing:border-box;
    font-family: 'Segoe UI', sans-serif;
}

body{
    background: linear-gradient(135deg,#4facfe,#00f2fe);
    height:100vh;
    margin:0;
    display:flex;
    align-items:center;
    justify-content:center;
}

.container{
    width:100%;
    max-width:380px;
    padding:15px;
}

.card{
    background:#fff;
    border-radius:16px;
    padding:25px;
    box-shadow:0 15px 35px rgba(0,0,0,0.2);
    text-align:center;
}

h2{
    margin:0;
    color:#333;
}

.subtitle{
    font-size:14px;
    color:#777;
    margin-bottom:20px;
}

input{
    width:100%;
    padding:14px;
    margin-bottom:15px;
    border-radius:10px;
    border:1px solid #ddd;
    font-size:16px;
}

input:focus{
    outline:none;
    border-color:#4facfe;
}

button{
    width:100%;
    padding:15px;
    background:#4facfe;
    border:none;
    border-radius:12px;
    color:#fff;
    font-size:18px;
    cursor:pointer;
}

button:active{
    transform:scale(0.98);
}

#msg{
    margin-top:15px;
    font-weight:bold;
    color:green;
}