styles.css

html, body
{
  background: #F9F7F6;
  font-family: 'Open Sans';
  font-size: 12px;
  line-height: 1.25;
}

header
{
  text-align: center;
  padding: 2em;
  color: #404D5B;
}


#content {
    display: flex;
    padding: 30px 200px;
}

#note-list {
    flex: 1;
    background: #c0dfd9;
    overflow: scroll;
    height: 100vh;
    display: flex;
    flex-direction: column;
    color: #404D5B;
    text-transform:uppercase;
    border-right: 2px solid #F9F7F6;
    min-width: 200px;
}

.note-list-item {
    cursor: pointer; 
    padding: 15px;
    border-bottom: 2px solid #F9F7F6;
    transition: all 0.25s ease;
}

.note-list-item:hover {
    background: #404D5B;
    color: #F9F7F6;
}

.note-list-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#note-detail {
    flex: 2;
    background: #c0dfd9;
    padding: 50px;
    color: #404D5B;
    text-transform:uppercase;
}

#preloader {
    margin: 0 auto;
    display: block;
    margin-top: 240px;
    box-sizing: border-box;
    
}