body {
    font-family: system-ui, 'Segoe UI', sans-serif;
    background: #f5f7fb;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
h1, h2 { color: #1e293b; }
table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}
th, td {
    border: 1px solid #e2e8f0;
    padding: 10px;
    text-align: center;
}
th {
    background: #f1f5f9;
}
input, button {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
}
button {
    background: #3b82f6;
    color: white;
    cursor: pointer;
    border: none;
    margin-left: 8px;
}
button:hover {
    background: #2563eb;
}
.output-box {
    background: #f8fafc;
    margin-top: 16px;
    padding: 16px;
    border-radius: 12px;
    border-left: 6px solid #3b82f6;
    font-family: monospace;
}
.settings {
    margin-bottom: 20px;
    display: flex;
    gap: 16px;
    align-items: center;
}