style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@100;400;700&display=swap');
*{
    margin:0;
    padding:0;
    box-sizing: border-box;
}
html{
    font-size: 10px;
}

.container{
    width: 100%;
    margin:0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f2f2f2;
    height: 90vh;
}
.container .baslik{
    margin-top:15px;
    font-size: 3.2rem;
    font-family: 'Roboto', sans-serif;
    color:#fff;
    text-shadow: 0px 0px 5px grey;
}
.container .button{
    margin-top:50px;
    font-size: 1.6rem;
    padding:1rem 2rem;
    border:1px solid grey;
    color:grey;
    font-family: 'Roboto', sans-serif;
    transition: all 0.5s ease;
}
.container .button:hover{
    color:white;
    background-color: black;
    cursor: pointer;
}
.container .process-screen{
    margin-top:15px;
    width: 90%;
    height: 80vh;
    background-color: white;
    margin-bottom:10px;
    overflow:scroll;
    overflow-x:hidden;
    scrollbar-color: black;
}
.process-screen::-webkit-scrollbar-track
{
	-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
	background-color: #F5F5F5;
}

.process-screen::-webkit-scrollbar
{
	width: 6px;
	background-color: #F5F5F5;
}

.process-screen::-webkit-scrollbar-thumb
{
	background-color: #000000;
}

.container .process-screen ul{
    padding: 1rem 2rem;
    list-style: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.container .process-screen ul li{
    border-bottom:1px solid black;
    width: 100%;
    padding:0.5rem;
    text-align: center;
}

.container .process-screen ul li a{
    font-size: 1.6rem;
    color:black;
    text-decoration: none;
}
.clicked{
    background-color: #70e000;
}