style.css

*{
    margin: 0;
    padding: 0;
}

body, html{
    height: 100%;
    margin: 0;
    padding: 0;
}

.bg{
    position: fixed;
    z-index: -1;
}

.bg img{
    opacity: 0.5;
    filter: brightness(50%);
}

section{
    position: relative;
    z-index: 1;
}

.Note{
    font-family: "Lobster", sans-serif;
    font-weight: 5500;
    font-style: normal;
    font-size: 50px;
    padding: 40px;
    margin-left: 20px;
}

.bulb{
    border: 5px solid black;
    border-radius: 50%;
    padding: 3px;
    background-color: purple;
}

.gap{
    height: 5px;
    background-color: rgb(33, 32, 32);
}

.plus{
    display: inline-block;
    position: fixed;
    font-family: Arial, sans-serif; 
    font-size: 60px;
    border: 4px solid black;
    padding: 1px 16px 1px 16px;
    border-radius: 50%;
    color: rgb(234, 255, 0);
    background-color: navy;
    font-weight: 400;
    margin-top: 29%;
    left: 93%;
    bottom: 5%;
    cursor: pointer;
}

.second{
    margin-top: -29%;
}

.text {
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    margin: 20px 20px 5px 40%;
    font-style: italic;
    font-size: 20px;
    display: block;
}

.boxes{
    background-image: url("assets/note.webp");
    height: 230px;
    width: 350px;
    border: 2px solid black;
    background-size: cover;
    background-repeat: no-repeat;
    margin: 2%;
}

textarea{
    margin-left: 10%;
    background: transparent;
    border: 2px solid;
    width: 250px;
    height: 90px;
    resize: none; 
    overflow: none;
}

.save{
    border: 2px solid black;
    background-color: rgb(68, 68, 244);
    color: white;
    border-radius: 5px;
    margin-left: 3%;
    padding: 4px;
    cursor: pointer;
}

.save:hover{
    background-color: rgb(147, 147, 245);
}

.material-symbols-outlined {
    cursor: pointer;
    margin: 6%;
}

.options{
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 1200px) {
    .plus{
        left: 92%;
    }
}
@media (max-width: 992px) {
    .plus{
        left: 88%;
    }
}
@media (max-width: 768px) {
    .plus{
        left: 83%;
    }
}
@media (max-width: 576px) {
    .plus{
        left: 76%;
        font-size: 45px;
    }
    .boxes{
        height: 200px;
        width: 300px;
    }
    .save{
        margin-top: -7%;
    }
    .material-symbols-outlined {
        margin-top: 3%;
    }
}
@media (max-width: 336px) {
    .plus{
        left:83%;
        bottom: 1%;
        font-size: 40px;
        padding: 0.5px 11px 0.5px 11px;
    }
    .Note{
        font-size: 40px;
    }
    .gap{
        width: 110%;
    }
    .boxes{
        height: 185px;
        width: 285px;
    }
    textarea{
        margin-top: -5%;
        width: 230px;
        height: 85px;
    }
}
@media (max-width: 269px) {
    .plus{
        left: 77%;
        bottom: 2%;
        position: relative;
    }
}