style.css

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

body {
	padding: 2rem;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica", "Arial", sans-serif;
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	min-height: 100vh;
}

.container {
	max-width: 900px;
	margin: 0 auto;
	background: white;
	padding: 2rem;
	border-radius: 12px;
	box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

h1 {
	font-size: 2rem;
	margin-bottom: 0.5rem;
	color: #1a202c;
}

.subtitle {
	color: #718096;
	font-size: 1rem;
	margin-bottom: 2rem;
}

h2 {
	font-size: 1.5rem;
	margin-bottom: 1rem;
	color: #2d3748;
}

.form-group {
	margin-bottom: 1.5rem;
}

label {
	display: block;
	font-weight: 600;
	margin-bottom: 0.5rem;
	color: #2d3748;
	font-size: 0.95rem;
}

select,
input[type="text"],
textarea {
	width: 100%;
	padding: 0.75rem;
	border: 2px solid #e2e8f0;
	border-radius: 8px;
	font-size: 0.95rem;
	transition: border-color 0.2s, box-shadow 0.2s;
}

select {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica", "Arial", sans-serif;
	background: white;
	cursor: pointer;
}

input[type="text"],
textarea {
	font-family: 'Monaco', 'Courier New', monospace;
}

select:focus,
input[type="text"]:focus,
textarea:focus {
	outline: none;
	border-color: #667eea;
	box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
	resize: vertical;
	min-height: 100px;
}

button[type="submit"],
button[type="button"] {
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
	border: none;
	padding: 0.875rem 2rem;
	font-size: 1rem;
	font-weight: 600;
	border-radius: 8px;
	cursor: pointer;
	transition: transform 0.2s, box-shadow 0.2s;
	width: 100%;
}

button[type="submit"]:hover:not(:disabled),
button[type="button"]:hover:not(:disabled) {
	transform: translateY(-2px);
	box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

button[type="submit"]:active:not(:disabled),
button[type="button"]:active:not(:disabled) {
	transform: translateY(0);
}

button[type="submit"]:disabled,
button[type="button"]:disabled {
	opacity: 0.6;
	cursor: not-allowed;
}

.status {
	margin: 1.5rem 0;
	padding: 1rem;
	border-radius: 8px;
	font-size: 0.95rem;
	display: none;
}

.status-info {
	background: #ebf8ff;
	color: #2c5282;
	border-left: 4px solid #4299e1;
}

.status-success {
	background: #f0fff4;
	color: #22543d;
	border-left: 4px solid #48bb78;
}

.status-error {
	background: #fff5f5;
	color: #742a2a;
	border-left: 4px solid #f56565;
}

.visualization-section {
	margin-top: 2rem;
	padding-top: 2rem;
	border-top: 2px solid #e2e8f0;
}

.viz-container {
	margin-top: 1.5rem;
	padding: 1rem;
	background: #f7fafc;
	border-radius: 8px;
	min-height: 200px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.viz-container:empty::after {
	content: 'Visualization will appear here';
	color: #a0aec0;
	font-style: italic;
}

.results-container {
	margin-top: 2rem;
	padding-top: 2rem;
	border-top: 2px solid #e2e8f0;
}

.results {
	margin-top: 1rem;
}

.table-wrapper {
	overflow-x: auto;
	border-radius: 8px;
	border: 1px solid #e2e8f0;
}

table {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.9rem;
}

th {
	background: #f7fafc;
	padding: 0.75rem;
	text-align: left;
	font-weight: 600;
	color: #2d3748;
	border-bottom: 2px solid #e2e8f0;
	white-space: nowrap;
}

td {
	padding: 0.75rem;
	border-bottom: 1px solid #e2e8f0;
	color: #4a5568;
}

tr:last-child td {
	border-bottom: none;
}

tr:hover {
	background: #f7fafc;
}

.row-count {
	margin-top: 1rem;
	color: #718096;
	font-size: 0.9rem;
	font-style: italic;
}

.no-results {
	color: #718096;
	font-style: italic;
	padding: 2rem;
	text-align: center;
}

@media (max-width: 768px) {
	body {
		padding: 1rem;
	}

	.container {
		padding: 1.5rem;
	}

	h1 {
		font-size: 1.5rem;
	}

	button[type="submit"],
	button[type="button"] {
		padding: 0.75rem 1.5rem;
	}

	table {
		font-size: 0.8rem;
	}

	th, td {
		padding: 0.5rem;
	}
}