style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

#navBar {
    background-color: #DADADB;
    height: 8vh;
    width: 100vw;
}

#titleName {
    padding: 0.6vh 0vh 0vh 1vh;
    float: left;
}

#buttonContainer {
    position: relative;
    text-align: center;
    align-items: center;
    padding-top: 1.8vh;
}

a {
    color: black;
    font-family: 'Poppins', sans-serif;
    margin-right: 5px;
    width: 60px;
    height: 30px;
    font-weight: bold;
    background-color: #b57eef;
    border-radius: 5px;
}

#buttonContainer :hover {
    background-color: #dad3e0;
}

#html {
    margin-right: -5px;
    width: 60px;
    height: 30px;
    font-weight: bold;
    background-color: #f06946;
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

#css {
    margin-right: -5px;
    width: 50px;
    height: 30px;
    font-weight: bolder;
    background-color: #0B73B8;
}

#js {
    margin-right: -5px;
    width: 90px;
    height: 30px;
    font-weight: bolder;
    background-color: #E5A228;
}

#output {
    width: 60px;
    height: 30px;
    font-weight: bolder;
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
}

.panel {
    resize: none;
}

#htmlContent {

    border-top: none;
    border-bottom: none;
    padding: 10px;
}

#cssContent {
    border-top: none;
    border-bottom: none;
    border-left: none;
}
#jsContent {
    border-top: none;
    border-bottom: none;
    border-left: none;
}

#outputContent {
    padding: 10px;
    border:none;
    
}

.panel {
    float: left;
    margin-bottom: 2px;
}

.hidden {
    display: none;
}

footer {
    text-align: center;
    background-color: #DADADB;
    height: 26px;
    clear: both;
    font-weight: normal;
}