style.css

* {
  box-sizing: border-box; 
}

body {
  font-family: sans-serif;
  font-size: 16px;
  padding: 0;
  margin: 0;
}

/* Make mobile responsive */
.container{
  width: 80%;
  margin: auto;
  overflow: hidden;
}

/* Remove margin and padding from the note */
ul {
  margin: 0;
  padding: 0;
}

h1, h3, p {
  color: #330033;
  text-align: center;
}

textarea {
  margin: 0;
  border-radius: 0;
  width: 100%;
  height: 75px;
  padding: 10px;
  float: left;
  font-size: 16px;
  resize: none;
}

.notespace {
  margin-top: 20vh;
}

/* Style the button*/
.delete-button, .save-button{
  padding: 10px;
  background: #660066;
  color: #ffffff;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
  border-radius: 10px;
  border: none;
  margin-bottom: 10px;
  width: 70px;
}

/* Move the buttons to center*/
.buttons {
  text-align: center;
}

/* Style the notes */
ul li {
  cursor: pointer;
  position: relative;
  padding: 12px 8px 12px 40px;
  background: #eee;
  font-size: 18px;
  transition: 0.2s;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Set all odd notes to a different color */
ul li:nth-child(odd){
  background-color: #f9f9f9;
}

/* Style the close button */
.close {
  position: absolute;
  right: 0;
  top: 0;
  padding: 12px 16px 12px 16px;
}

/* Style the edit button */
.edit {
  position: absolute;
  right: 0;
  top: 0;
  padding: 12px 46px 12px 16px;
}

/* Style the changes saved message*/
#update {
  margin-bottom: 10px;
  color: green;
  text-align: center;
  padding: 12px;
  border-color: green;
}

/* Style the changes saved message*/
#emptytext {
  margin-bottom: 10px;
  color: red;
  text-align: center;
  padding: 12px;
  border-color: red;
}

@media(max-width: 768px){
  textarea {
    width: 100%;
  }
}