style.css

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@200;400;600&display=swap");

* {
    box-sizing: border-box;
}

body {
    background-color: #7bdaf3;
    display: flex;
    flex-wrap: wrap;
    font-family: "Poppins", sans-serif;
    margin: 0;
    padding-top: 3rem;

    min-height: 100%;
 
}

.add {
    background-color: #9ec862;
    border-radius: 3px;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.5rem 1rem;
    position: fixed;
    top: 1rem;
    right: 1rem;
    overflow: hidden;
    transition: 0.3s;
    
}

.add:hover
{
    color: #9ec862;
    background: #008000;
    box-shadow: 0 0 10px #008000, 0 0 20px #008000, 0 0 30px #008000,
}

.note {
    background-color: #fff;
    box-shadow: 0 0 10px 4px rgba(0, 0, 0, 0.1);
    margin: 20px;
    height: 400px;
    width: 400px;
      
}

.note .tools {
    background-color: #9ec862;
    display: flex;
    justify-content: flex-end;
    padding: 0.5rem;
}

.note .tools button {
    background-color: transparent;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    margin-left: 0.5rem;
}

.note .main {
    background-color: #eee;
    overflow: hidden;
    height: 400px;
    width: 100%;

}

.note textarea {
    outline: none;
    font-family: inherit;
    font-size: 1.2rem;
    border: none;
    height: 400px;
    width: 100%;
    background-color:bisque;
  
    
}

.note .hidden {
    display: none;

}

/* Add a black background color to the top navigation */
.topnav {
    background-color: #333;
    overflow: hidden;
    position: fixed; /* Set the navbar to fixed position */
  top: 0; /* Position the navbar at the top of the page */
  width: 100%; /* Full width */

  }
  
  /* Style the links inside the navigation bar */
  .topnav a {
    float: left;
    color: #f2f2f2;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  }
  
  /* Change the color of links on hover */
  .topnav a:hover {
    background-color: #ddd;
    color: black;
  }
  
  /* Add a color to the active/current link */
  .topnav a.active {
    background-color: #04AA6D;
    color: white;
  }