body{
    font-family: Arial, Helvetica, sans-serif;
    margin:0;
    background:#0f1115;
    color:#e6e6e6;
}

header{
    background:#161a22;
    padding:18px 40px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

header h1{
    font-size:20px;
    margin:0;
}

nav{
    display:flex;
    gap:20px;
}

.container{
    max-width:900px;
    margin:auto;
    padding:40px;
}

a{
    color:#4ea1ff;
    text-decoration:none;
}

button{
    padding:10px 18px;
    border:none;
    background:#4ea1ff;
    color:white;
    border-radius:6px;
    cursor:pointer;
}

button:hover{
    background:#3b82d6;
}

footer{
    margin-top:60px;
    padding:20px;
    text-align:center;
    background:#161a22;
}

.modal{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.7);
    display:flex;
    justify-content:center;
    align-items:center;
}

.modal-content{
    background:#1b1f29;
    padding:30px;
    max-width:700px;
    max-height:80vh;
    overflow:auto;
    border-radius:10px;
}

.hidden{
    display:none;
}

.checkbox{
    margin-top:15px;
}