body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background-color: #2e2e2e;
    color: #f5f5f5;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 700px;
    background: #3a3a3a;
    padding: 20px;
    margin: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}
h1 {
    text-align: center;
    color: #ff4b4b;
}
input, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border-radius: 4px;
    border: 1px solid #ccc;
}
button {
    background: #ff4b4b;
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: bold;
}
button:hover {
    background: #cc3a3a;
}
.result {
    background: #4a4a4a;
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
    white-space: pre-line;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: #4a4a4a;
}
table th, table td {
    border: 1px solid #666;
    padding: 8px;
    text-align: center;
}
table th {
    background: #ff4b4b;
    color: #fff;
}