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

body{
    background:#0f172a;
    color:white;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
}

.panel{
    width:500px;
    background:#1e293b;
    padding:30px;
    border-radius:15px;
    box-shadow:0 0 25px rgba(0,0,0,.4);
}

h2{
    text-align:center;
    margin-bottom:25px;
    color:#4ade80;
}

select{
    width:100%;
    padding:12px;
    border:none;
    border-radius:8px;
    background:#0f172a;
    color:white;
    margin-bottom:20px;
    font-size:16px;
}

.buttons{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px;
}

button{
    padding:12px;
    border:none;
    border-radius:8px;
    color:white;
    font-weight:bold;
    cursor:pointer;
    transition:.2s;
    font-size:15px;
}

button:hover{
    transform:scale(1.03);
}

.start{
    background:#22c55e;
}

.start:hover{
    background:#16a34a;
}

.stop{
    background:#ef4444;
}

.stop:hover{
    background:#dc2626;
}

.restart{
    background:#f59e0b;
}

.restart:hover{
    background:#d97706;
}

.status{
    background:#3b82f6;
}

.status:hover{
    background:#2563eb;
}

.load-btn{
    background:#6366f1;
}

.load-btn:hover{
    background:#4f46e5;
}

#out{
    margin-top:20px;
    background:#0f172a;
    padding:15px;
    border-radius:10px;
    min-height:150px;
    overflow:auto;
    color:#4ade80;
    border:1px solid #334155;
}