body, h1 {
    margin: 0;
    padding: 0;
}
header { 
    width:100%;
    max-width:1000px;
    margin:auto;
    background-color: lightblue;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding:15px;
}
main { 
    width:100%;
    max-width:1000px;
    margin:auto;
    padding-top:20px;
}
button{
    border:none;
    width:100px;
    height:30px;
    background:lightblue;
    transition:all 0.5s;
    cursor:pointer;
}
button:hover {
    background:rgb(184, 187, 187);
}
input {
    width:300px;
    height:30px;
    border:2px solid lightblue;
    box-sizing: border-box;
    outline: none;
    padding:5px;
}
.nav {
    display:flex;
    list-style-type:none;
    gap:10px;
}
.list {
    padding-left:0; 
}
.list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding:10px 0px;
    border-bottom: 1px solid gray;
}