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

body{

background:#f5f7fb;

display:flex;

justify-content:center;

align-items:center;

height:100vh;

}

.login-box{

width:420px;

background:#fff;

padding:40px;

border-radius:10px;

box-shadow:0 5px 20px rgba(0,0,0,.15);

}

.login-box h2{

margin-bottom:5px;

text-align:center;

color:#0b5ed7;

}

.login-box h4{

margin-bottom:25px;

text-align:center;

font-weight:normal;

color:#666;

}

input{

width:100%;

padding:12px;

margin-bottom:15px;

border:1px solid #ccc;

border-radius:5px;

font-size:15px;

}

button{

width:100%;

padding:12px;

border:none;

background:#0b5ed7;

color:white;

font-size:16px;

border-radius:5px;

cursor:pointer;

}

button:hover{

background:#084298;

}

.error{

background:#ffe2e2;

color:red;

padding:10px;

margin-bottom:15px;

border-radius:5px;

}