main-style.css

*{
    /* Include content, padding and border in elements total width and height */
    box-sizing: border-box; 
}

body{
    background-color: teal;
}

.container{
    display: flex;
    flex-direction: column;
    font-size: medium;
}

header{
    text-align: center;
}

h1{
    font: 300% 'Righteous', cursive;
    margin-bottom: 1%;
}

h2{
    margin-top: 0%;
    font: bold 150% 'Bubbler One', sans-serif;
}

form{
    text-align: center;
}

#notetxt{
    width: 62%;
    padding: 10px;
    font-size: 100%;
    border: 2px solid black;
    border-radius: 20px;
}

#addButton{
    width: 120px;
    padding: 10px 5px;
    font: bold 100% 'Arial', sans-serif;
    border: 2px solid black;
    border-radius: 10px;
    background: rgb(80, 150, 86);
}

#notetxt:focus , #notetxt:hover, #addButton:hover{
    box-shadow: 0px 0px 10px 2px rgb(75, 69, 69);
}  

@media screen and (max-width: 350px){
    h1{
        font-size: 250%;
    }

    h2{
        font-size: 125%;
    }

    #notetxt{
        width: 90%;
    }

    #addButton{
        margin-top: 5%;
    }
}

#stickers{
    display: flex;
    flex-wrap: wrap;
    margin: 2% 0% 0% 0%;
    padding: 0%;
    justify-content: center;
    list-style-type: none;
}

#stickers li{
    width: 220px;
    height: 320px;
    margin: 10px;
    text-align: center;
    padding: 10px 10px; /* top-bottom left-right */
    font: 200% 'Nanum Pen Script', cursive;
    background: #fff740;
    box-shadow: 5px 5px 2px rgb(75, 69, 69);
}

.sticky{
    word-wrap: break-word;
}