body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: "Poppins", sans-serif;
    background: #333;
    color: #fff;
}
#home
{
    position: fixed;
    top: 10px;
    left: 20px;
    background:url(Home.png);
}
.navigation{
    display: flex;
    position: fixed;
    background-color:black;
    text-decoration: none;
    width: 100%;
    height: 50px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 2);
}
#upload{
    position: fixed;
    background-color: #94ebef;
    border: none;
    border-radius: 4px;
    top: 10px;
    right: 20px;
    width: 100px;
    height: 35px;
    cursor: pointer;
}
#upload:hover{
    transform: scale(1.1);
    background-color: #8bdbf1;
}
header{
    display:block;
    padding: 50px;
    text-align-last: center
}
#materials{
    width: 90%;
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background: linear-gradient(to bottom,#688fe5,#95e4e5);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 3);
    border-radius: 10px;
}
#listhead{
    text-align: center;
    font-size: 30px;
    color:#fff;
    margin-bottom: 30px;
    text-transform: uppercase;
    letter-spacing: 2px;
}
#file-list{
    list-style: none;
    padding: 0;
    margin: 0;
    width: 500px auto 0;
    border-radius: 10px;
    overflow: hidden;
}
#file-list li{
    background:  rgba(255, 255, 255, 0.2);
    margin: 8px 0;
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    display: flex;
    align-items: center;
    position: relative;
    font-size: 18px;
    font-weight: 500;
    transition: background 0.3s;
}
#file-list li a{
    color: white;
    text-decoration: none;
    flex-grow: 1;
}
#file-list li a:hover{
    text-decoration: underline;
}

#file-list li:hover{
    background: rgba(255, 255, 255, 0.4);
}
#file-list li::before{
    content: counter(item)". ";
    counter-increment: item;
    margin-right: 10px;
    font-weight: bold;
}
#file-list{
    counter-reset: item;
}
@media (max-width: 600px){
    header{
        display:block;
        padding: 30px;
        text-align-last: center;
    }
    #materials{
        width: 80%;
        max-width: 500px;
    }
    #file-list{
        width: 100%;
    }
    #file-list li{
        font-size: 16px;
        padding: 12px 16px;
    }
}