styles.css

body {
    font-family: Arial, Helvetica, sans-serif;
}

#headerTop {
    display: flex;
    flex-direction: row;
    color: white;
    padding: 1rem;
    
    background-color: rgb(86, 88, 228);
}


#headerBottom {
    display: flex;
    flex-direction: row;
    margin: 5px;
}
#headerBottom div:nth-child(2) {
    display: flex;
    justify-content: center;
    margin: 8px;
}

#headerTop>div>span {
    margin-right: 1.5rem;
}

span:nth-of-type(1) {
    font-weight: bold;
    text-transform: uppercase;
    margin-left: -10px;
}

#headerBottom {
    border-bottom: 1px solid gray;
    padding: 5px;
}

#headerBottom>div:nth-of-type(1) {
    color: white;
    background-color: rgb(86, 88, 228);
    font-weight: bold;
    padding: 0.4rem;
    border-radius: 5px;
    margin-right: 15px;
    cursor: pointer;
}

button{
    margin-right: 10px;
    cursor: pointer;
}

.active {
    font-weight: bolder;
    border-bottom: 2px solid rgb(86, 88, 228);;
}

.email>div {
    display: inline-block;
    padding-left: 20px;
    padding-top: 2px;
    padding-bottom: 2px;
    border-bottom: 0.5px solid lightgray;
}

.email-name,
.email-subject{
    width: 35%;
}

.email-check, 
.email-date, 
.email-size {
    width: 8%;
}

.email:nth-of-type(1) {
    font-weight: bold;
}