*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Arial, sans-serif;
    background:#f5f5f5;
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
}

.login-box{
    width:100%;
    max-width:400px;
    background:#ffffff;
    padding:30px;
    border-radius:10px;
    box-shadow:0 0 15px rgba(0,0,0,0.1);
}

.login-box h1{
    text-align:center;
    margin-bottom:25px;
    font-size:28px;
}

.login-box input{
    width:100%;
    padding:12px;
    margin-bottom:15px;
    border:1px solid #ddd;
    border-radius:5px;
    font-size:15px;
}

.login-box input:focus{
    outline:none;
    border-color:#333;
}

.login-box button{
    width:100%;
    padding:12px;
    border:none;
    border-radius:5px;
    background:#111;
    color:#fff;
    font-size:16px;
    cursor:pointer;
    transition:.3s;
}

.login-box button:hover{
    background:#333;
}

.error{
    color:#d60000;
    text-align:center;
    margin-bottom:15px;
    font-size:14px;
}