*{
    box-sizing:border-box;
    margin:0;
    padding:0;
    font-family:Arial,sans-serif;
}

body{
    background:#111827;
    color:#fff;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
    padding:20px;
}

.container{
    width:100%;
    max-width:500px;
}

.card{
    background:#1f2937;
    padding:25px;
    border-radius:12px;
    box-shadow:0 0 15px rgba(0,0,0,.4);
}

h1{
    margin-bottom:20px;
    text-align:center;
}

label{
    display:block;
    margin-top:15px;
    margin-bottom:5px;
}

input{
    width:100%;
    padding:12px;
    border:none;
    border-radius:8px;
    background:#374151;
    color:#fff;
}

button{
    width:100%;
    padding:12px;
    border:none;
    border-radius:8px;
    margin-top:20px;
    background:#2563eb;
    color:#fff;
    cursor:pointer;
    font-weight:bold;
}

button:hover{
    opacity:.9;
}

button.danger{
    background:#dc2626;
}

textarea{
    width:100%;
    height:180px;
    margin-top:15px;
    border:none;
    border-radius:8px;
    background:#111827;
    color:#00ff88;
    padding:12px;
    resize:none;
}