*{
    box-sizing:border-box;
    font-family:Arial;
}

body{
    margin:0;
    background:#f5f5f5;
    display:flex;
    justify-content:center;
    align-items:center;
    height:100vh;
}

#login,#register,#dashboard{
    background:#fff;
    padding:25px;
    border-radius:10px;
    width:320px;
    text-align:center;
    box-shadow:0 4px 10px rgba(0,0,0,.1);
}

input{
    width:100%;
    padding:10px;
    margin:6px 0;
    border:1px solid #ccc;
    border-radius:6px;
}

button{
    width:100%;
    padding:10px;
    margin-top:8px;
    border:none;
    border-radius:6px;
    background:#4f46e5;
    color:#fff;
    cursor:pointer;
}

button:hover{opacity:.9}

p{
    margin-top:10px;
    color:#4f46e5;
    cursor:pointer;
}

ul{
    list-style:none;
    padding:0;
    margin-top:10px;
}

li{
    background:#eee;
    margin:5px 0;
    padding:8px;
    border-radius:6px;
}

#total{
    margin-top:10px;
    font-weight:bold;
}