body{
    margin:0;
    background:#0f0f0f;
    color:white;
    font-family:Arial, sans-serif;
    display:flex;
    justify-content:center;
    align-items:center;
    height:100vh;
}

.container{
    width:350px;
    background:#1b1b1b;
    padding:30px;
    border-radius:12px;
    text-align:center;
    box-shadow:0 0 20px rgba(0,0,0,0.4);
}

h1{
    margin-bottom:20px;
}

select, button{
    width:100%;
    padding:12px;
    margin-top:12px;
    border:none;
    border-radius:6px;
    font-size:16px;
}

button{
    background:#00aa55;
    color:white;
    cursor:pointer;
}

button:hover{
    opacity:0.9;
}

#result{
    margin-top:20px;
    font-size:18px;
}

.available{
    color:#00ff88;
}

.taken{
    color:#ff5555;
}