*{
    box-sizing:border-box;
}

body{
    margin:0;
    background:#121212;
    color:#ffffff;
    font-family:Arial,Helvetica,sans-serif;
}

.container{
    max-width:1000px;
    margin:auto;
    padding:20px;
}

.header{
    text-align:center;
    margin-bottom:20px;
}

.card{
    background:#1e1e1e;
    border-radius:12px;
    padding:20px;
    margin-bottom:20px;
}

.btn{
    width:100%;
    border:none;
    border-radius:10px;
    padding:18px;
    margin-bottom:12px;
    font-size:18px;
    cursor:pointer;
}

.record{
    background:#2e7d32;
    color:white;
}

.stop{
    background:#c62828;
    color:white;
}

audio{
    width:100%;
    margin-top:10px;
}

textarea{
    width:100%;
    min-height:300px;
    background:#2a2a2a;
    color:white;
    border:none;
    border-radius:10px;
    padding:15px;
    resize:vertical;
}

@media (min-width: 900px){

    .container{
        max-width:1200px;
    }

    .card{
        padding:25px;
    }

    .btn{
        font-size:20px;
    }
}

@media (min-width: 900px){
    .card:first-of-type{
        display:grid;
        grid-template-columns:1fr 1fr;
        gap:14px;
        align-items:center;
    }

    .card:first-of-type audio{
        grid-column:1 / -1;
    }

    .btn{
        width:auto;
        margin-bottom:0;
        padding:14px 18px;
        font-size:16px;
    }
}