body {
    margin:0;
    font-family: Arial;
    background:#0b0b0f;
    color:#eaeaea;
}

.container {
    max-width:1100px;
    margin:auto;
    padding:30px 18px;
}

.header {
    text-align:center;
    padding:30px;
}

.header h1 {
    font-size:34px;
}

.header p {
    color:#aaa;
}

.layout {
    display:flex;
    gap:20px;
    margin-top:20px;
}

.panel {
    background:rgba(20,20,32,0.85);
    border:1px solid rgba(255,255,255,0.06);
    border-radius:16px;
    padding:20px;
}

.left { flex:1; }
.right { flex:1.3; }

textarea {
    width:100%;
    height:300px;
    padding:12px;
    border-radius:10px;
    border:none;
    background:#0f0f15;
    color:#fff;
    resize:none;
    margin-top:10px;
}

.output {
    width:100%;
    height:300px;
    background:#0f0f15;
    border-radius:12px;
    padding:12px;
    overflow:auto;
}

pre {
    white-space:pre-wrap;
    word-wrap:break-word;
}

button {
    padding:12px;
    border:none;
    border-radius:10px;
    cursor:pointer;
    background:linear-gradient(90deg,#ff0000,#cc0000);
    color:#fff;
}

.btn-group {
    display:flex;
    gap:10px;
    margin-top:10px;
}

.card {
    background:#141420;
    padding:20px;
    border-radius:14px;
    margin-top:20px;
}

.footer {
    text-align:center;
    margin-top:50px;
    padding:20px;
    font-size:13px;
    color:#666;
}

@media(max-width:900px){
    .layout{ flex-direction:column; }
}