index.css

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Rubik', sans-serif;
    background-color: #EEF0F4;
    user-select: none; /*You cant select anything thats not a pointer*/
}

.container {
    display: flex;
    flex-direction: column;
    max-width: 320px;
    margin: 30px auto;
    

}

h1 {
    padding: 0;
    margin: 10px auto;
    text-align: center;
    
    
}

img {
    width: 150px;
    margin: 0 auto;
}

input {
    color: #432000;
    background-color: #DCE1EB;
    border: 0;
    padding: 15px;
    border-radius: 8px;
    font-size: 20px;
    text-align: center;
    font-family: 'Rubik', sans-serif;
    margin: 10px 0;
}

button {
    color: #FDFDFD;
    background-color: #AC485A;
    border: 0;
    padding: 15px;
    border-radius: 8px;
    font-size: 20px;
    text-align: center;
    font-family: 'Rubik', sans-serif;
    cursor: pointer;
     
}

button:hover {
    background: #6b0092;
}

ul{
    display:flex;
    list-style: none;
    flex-wrap:wrap;
    padding: 0; /*We dont want padding on our ul*/
    gap: 10px;
    
}

ul li {
    
    padding: 15px; /*to increase the space inside the box*/
    background-color: #FFFDF8;
    box-shadow: 0px 1px 4px rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    flex-grow: 1;/* fills in the spaces left*/
    text-align: center;
    cursor: pointer;
    
}

ul li:hover {
    background: #a7b5d2;
}