body{
    font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    margin:40px;
    background:#f4f6fa;
    color:#222;
}

.container{
    max-width:900px;
    margin:auto;
    background:white;
    padding:30px;
    border-radius:14px;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
}

h1{
    margin-top:0;
}

.row{
    display:flex;
    gap:20px;
    align-items:center;
    margin-bottom:20px;
    flex-wrap:wrap;
}

textarea{
    width:100%;
    height:220px;
    font-family:monospace;
    font-size:15px;
    padding:12px;
    resize:vertical;
}

input{
    padding:8px;
    font-size:16px;
}

button{
    padding:12px 20px;
    font-size:16px;
    background:#1976d2;
    color:white;
    border:none;
    border-radius:8px;
    cursor:pointer;
}

button:hover{
    background:#1565c0;
}

button:disabled{
    opacity:.6;
    cursor:not-allowed;
}

#log{
    margin-top:20px;
    background:#111;
    color:#0f0;
    padding:15px;
    height:250px;
    overflow:auto;
    font-family:monospace;
    white-space:pre-wrap;
    border-radius:10px;
}

.footer{
    margin-top:20px;
    color:#666;
}
.center {
  display: flex;
  justify-content: center;
  align-items: center;
}
body {
  margin: 0;
  padding: 0;
}

h2, p {
  margin: 10px;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #38444d;
}

li {
  float: left;
}

li a, .dropbtn {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover, .dropdown:hover .dropbtn {
  background-color: red;
}

li.dropdown {
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.dropdown-content a:hover {background-color: #f1f1f1;}

.dropdown:hover .dropdown-content {
  display: block;
}