body{
    margin:0;
    background:#111;
    color:#fff;
    font-family:Arial,sans-serif;
}

.pdf-header{
    position:sticky;
    top:0;
    z-index:1000;
    background:#000;
    padding:15px;
}

.pdf-header a{
    color:#fff;
    text-decoration:none;
    font-weight:bold;
}

#pdf-container{
    width:100%;
    margin:0;
    padding:10px;
    box-sizing:border-box;
}

.pdf-page{
    margin-bottom:20px;
}

canvas{
    display:block;
    width:100%;
    height:auto;
    box-shadow:0 0 10px rgba(0,0,0,.5);
}

.reader-controls{
    position:sticky;
    top:0;
    z-index:999;
    background:#fff;
    padding:15px;
    display:flex;
    justify-content:center;
    align-items:center;
    gap:20px;
    border-bottom:1px solid #ddd;
}

.reader-controls button{
    padding:10px 18px;
    cursor:pointer;
    border:none;
    background:#111;
    color:#fff;
}

#page-holder{
    width:100%;
    max-width:none;
    margin:30px auto;
    overflow:auto;
}

#page-holder canvas{
    width:100%;
    height:auto;
    display:block;
}

.icon-btn{
    width:40px;
    height:40px;

    display:flex;
    align-items:center;
    justify-content:center;

    background:#111;
    color:#fff;

    border:none;
    border-radius:8px;

    font-size:22px;
    font-weight:300;

    cursor:pointer;
}

#zoomInput{
    width:70px;
    text-align:center;
}