body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;  
}
h1{
    text-align: center;
}


header {
    background-color:burlywood;
    color: white;
    padding: 10px 0;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 5px 10px;
}

nav ul li a:hover {
    background-color: rgb(228, 142, 29);
    border-radius: 5px;
}

main {
    padding: 5px;
    text-align: center;
}

footer {
    background-color: burlywood;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}

/* scenario 1 */
main.counter-page {
    text-align: center;
    margin-top: 50px;
}
#countDisplay {
    font-size: 2em;
    margin: 15px;
    display: block;
}
#clickBtn {
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
}
#message {
    font-weight: bold;
    margin-top: 10px;
}

/* scenario 2 */
.tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}
.tab {
    padding: 10px 20px;
    cursor: pointer;
    background-color: burlywood;
    color: white;
    border: none;
    outline: none;
}
.tab.active {
    background-color: rgb(228,142,29);
}
.tab-content {
    display: none;
    text-align: center;
    margin-top: 10px;
}
.tab-content.active {
    display: block;
}