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

body{

background:linear-gradient(135deg,#0b63d8,#39a8ff);

min-height:100vh;

display:flex;

justify-content:center;

align-items:center;

padding:20px;

}

.login-box{

width:100%;

max-width:430px;

background:#ffffff;

border-radius:15px;

padding:30px;

box-shadow:0 10px 30px rgba(0,0,0,.25);

text-align:center;

}

.logo{

    width:100%;

    max-width:300px;

    display:block;

    margin:0 auto 15px;

    height:auto;

}

h2{

    font-size:26px;

    margin-bottom:20px;

    color:#222;

}

input{

width:100%;

height:50px;

padding:0 15px;

margin-bottom:18px;

border:1px solid #ccc;

border-radius:8px;

font-size:16px;

outline:none;

transition:.3s;

}

input:focus{

border-color:#0b63d8;

box-shadow:0 0 5px rgba(11,99,216,.4);

}

button{

width:100%;

height:50px;

border:none;

border-radius:8px;

background:#f5a000;

color:#fff;

font-size:18px;

font-weight:bold;

cursor:pointer;

transition:.3s;

}

button:hover{

background:#df8f00;

}

.error{

margin-top:18px;

color:red;

font-weight:bold;

min-height:22px;

}

@media(max-width:480px){

.login-box{

padding:22px;

}

.logo{

width:180px;

}

h2{

font-size:22px;

}

}