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

#html-btn {
    background-color: #ff9900;
}

#css-btn {
    background-color: #2196f3;
}

#javascript-btn {
    background-color: #f7dc6f;
}

#prev-btn {
    background-color: #808080;
}

#next-btn {
    background-color: #007bff;
}

#submit-btn {
    background-color: #2ecc71;
}

#reset-btn {
    background-color: #e74c3c;
}
.index-head{
    font-size: 40px;
    text-align: center;
}
.btns1, .btns2{
    display: flex;
    justify-content: center;
    align-items: center;
}
.gk-btn button{
    text-decoration: none;
    border-style: none;
    padding: 10px;
    margin:20px;
    border-radius: 5px;
    font-size: 20px;
    background-color: #f7dc6f;
}
.gk-btn button:hover{
    background-color: #fae8a1;
}
.c-btn button{
    text-decoration: none;
    border-style: none;
    padding: 10px;
    margin:20px;
    border-radius: 5px;
    font-size: 20px;
    background-color: #ff9900;
}
.c-btn button:hover{
    background-color: #fad49b;
}
.java-btn button{
    text-decoration: none;
    border-style: none;
    padding: 10px;
    margin:20px;
    border-radius: 5px;
    font-size: 20px;
    background-color: #2ecc71;
}
.java-btn button:hover{
    background-color: #95ffc1;
}
.python-btn button{
    text-decoration: none;
    border-style: none;
    padding: 10px;
    margin:20px;
    border-radius: 5px;
    font-size: 20px;
    background-color: #2196f3;
}
.python-btn button:hover{
    background-color: #9ac8f9;
}
.html-btn button{
    text-decoration: none;
    border-style: none;
    padding: 10px;
    margin:20px;
    border-radius: 5px;
    font-size: 20px;
    background-color: #e74c3c;
}
.html-btn button:hover{
    background-color: #f99c91;
}