:root {
	--border: #d7dce3;
	--text: #1f2733;
	--muted: #5f6b7a;
	--background: #f4f6f9;
	--card: #ffffff;
	--accent: #1f5fbf;
	--match: #1c7c43;
	--match-bg: #e2f4e8;
	--unmatch: #b3261e;
	--unmatch-bg: #fbe7e5;
	--error: #9a6700;
	--error-bg: #fff3d6;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
	color: var(--text);
	background: var(--background);
	line-height: 1.45;
}

header {
	background: var(--card);
	border-bottom: 1px solid var(--border);
	padding: 16px 28px;
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 16px;
}

.page-link {
	color: var(--accent);
	text-decoration: none;
	font-size: 14px;
	font-weight: 600;
	white-space: nowrap;
	padding-top: 4px;
}

.page-link:hover {
	text-decoration: underline;
}

.header-actions {
	display: flex;
	align-items: center;
	gap: 12px;
}

.lang-select {
	font: inherit;
	font-size: 13px;
	color: var(--text);
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 6px;
	padding: 5px 8px;
	cursor: pointer;
}

.lang-select:focus {
	outline: 2px solid var(--accent);
	outline-offset: 1px;
}

.sample-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: 16px;
}

.sample-card {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 14px 16px;
}

.sample-card .sample-name {
	font-weight: 600;
	font-family: Consolas, monospace;
	margin-bottom: 4px;
}

.sample-card .sample-desc {
	color: var(--muted);
	font-size: 13px;
	margin-bottom: 10px;
}

.sample-download {
	color: var(--accent);
	font-size: 14px;
	font-weight: 600;
	text-decoration: none;
}

.sample-download:hover {
	text-decoration: underline;
}

.upload-row {
	display: flex;
	align-items: center;
	gap: 12px;
	flex-wrap: wrap;
}

.table-scroll {
	overflow-x: auto;
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 10px 12px;
}

.issue-line {
	background: var(--error-bg);
	border: 1px solid var(--error);
	color: var(--error);
	border-radius: 6px;
	padding: 6px 12px;
	font-size: 13px;
	margin-bottom: 6px;
	max-width: 720px;
}

header h1 {
	margin: 0 0 4px 0;
	font-size: 22px;
}

header p {
	margin: 0;
	color: var(--muted);
	font-size: 14px;
}

main {
	max-width: 1180px;
	margin: 0 auto;
	padding: 20px 28px 60px 28px;
}

section {
	margin-bottom: 32px;
}

.section-header {
	display: flex;
	align-items: center;
	gap: 12px;
	flex-wrap: wrap;
	margin-bottom: 12px;
}

.section-header h2 {
	margin: 0;
	font-size: 18px;
	margin-right: auto;
}

h3 {
	font-size: 15px;
	margin: 20px 0 10px 0;
}

.hint {
	color: var(--muted);
	font-size: 13px;
	margin: 4px 0 10px 0;
}

.inline-label {
	font-size: 14px;
	color: var(--muted);
}

button {
	font: inherit;
	padding: 6px 14px;
	border: 1px solid var(--border);
	border-radius: 6px;
	background: var(--card);
	cursor: pointer;
}

button:hover {
	border-color: var(--accent);
}

button.primary {
	background: var(--accent);
	border-color: var(--accent);
	color: #ffffff;
	font-weight: 600;
	padding: 9px 22px;
}

button:disabled,
button:disabled:hover {
	border-color: var(--border);
	cursor: not-allowed;
	opacity: 0.55;
}

button.danger {
	padding: 2px 9px;
	font-size: 13px;
}

select,
input {
	font: inherit;
	padding: 5px 8px;
	border: 1px solid var(--border);
	border-radius: 6px;
	background: #ffffff;
}

input.readonly {
	background: #eef1f5;
	color: var(--muted);
}

.tables-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 16px;
}

.table-card {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 12px 14px;
}

.table-card h4 {
	margin: 0 0 10px 0;
	font-size: 14px;
	letter-spacing: 0.4px;
}

table {
	border-collapse: collapse;
	width: 100%;
	font-size: 13px;
}

th,
td {
	border: 1px solid var(--border);
	padding: 4px 6px;
	text-align: left;
	vertical-align: middle;
}

th {
	background: #eef1f5;
	font-weight: 600;
}

td input {
	width: 100%;
	border: 1px solid transparent;
	border-radius: 4px;
	padding: 3px 4px;
}

td input:focus {
	border-color: var(--accent);
	outline: none;
}

.rule-description {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 14px 16px;
}

.rule-description .expectation {
	margin: 0 0 10px 0;
	font-weight: 600;
}

.rule-description .step {
	margin-bottom: 10px;
}

.rule-description .step-title {
	font-weight: 600;
}

.rule-description .transitions {
	color: var(--muted);
	font-size: 13px;
}

.rule-description .condition-row {
	font-size: 13px;
	margin-left: 14px;
}

.built-in-step {
	margin-top: 14px;
}

.read-only-source-pair {
	display: grid;
	grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
	align-items: stretch;
	gap: 10px;
}

.read-only-source {
	display: flex;
	flex-direction: column;
	gap: 4px;
	background: var(--background);
	border: 1px solid var(--border);
	border-radius: 6px;
	padding: 9px 12px;
}

.read-only-label {
	color: var(--muted);
	font-size: 12px;
}

.source-pair-connector {
	align-self: center;
	color: var(--accent);
	font-size: 22px;
	font-weight: 700;
}

.built-in-description {
	color: var(--muted);
	font-size: 13px;
	margin: 10px 0;
}

.read-only-conditions {
	display: grid;
	gap: 7px;
}

.read-only-condition {
	display: grid;
	grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
	align-items: center;
	gap: 10px;
	border: 1px dashed var(--border);
	border-radius: 6px;
	padding: 8px 10px;
}

.read-only-operand {
	font-family: monospace;
	font-size: 13px;
	overflow-wrap: anywhere;
}

.read-only-operand:last-child {
	text-align: right;
}

.read-only-operator {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 4px;
}

.operator-chip,
.candidate-key-chip {
	border-radius: 999px;
	font-size: 11px;
	padding: 2px 8px;
	white-space: nowrap;
}

.operator-chip {
	background: var(--background);
	color: var(--accent);
}

.candidate-key-chip {
	background: var(--card);
	border: 1px solid var(--border);
	color: var(--muted);
}

.read-only-transitions {
	display: grid;
	gap: 6px;
	margin-top: 10px;
}

.read-only-transition {
	display: flex;
	align-items: center;
	gap: 8px;
	color: var(--muted);
	font-size: 13px;
}

.rule-step-connector {
	color: var(--unmatch);
	font-size: 13px;
	font-weight: 600;
	margin: -7px 0 -7px 22px;
}

.custom-rule-panel {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 14px 16px;
}

.custom-rule-panel .panel-row {
	display: flex;
	align-items: center;
	gap: 10px;
	flex-wrap: wrap;
	margin-bottom: 12px;
}

.ai-rule-panel {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 10px;
	overflow: hidden;
}

.ai-panel-header {
	display: flex;
	align-items: center;
	gap: 10px;
	border-bottom: 1px solid var(--border);
	padding: 12px 16px;
}

.ai-panel-header h3 {
	margin: 0;
	font-size: 15px;
}

.ai-panel-header p {
	margin: 1px 0 0 0;
	color: var(--muted);
	font-size: 12px;
}

.ai-avatar {
	display: grid;
	place-items: center;
	width: 36px;
	height: 36px;
	border-radius: 50%;
	background: var(--accent);
	color: #ffffff;
	font-size: 12px;
	font-weight: 700;
}

.ai-chat-messages {
	display: flex;
	flex-direction: column;
	gap: 10px;
	min-height: 210px;
	max-height: 360px;
	overflow-y: auto;
	padding: 16px;
	background: #f8fafd;
}

.ai-message {
	display: flex;
}

.ai-message-user {
	justify-content: flex-end;
}

.ai-message-bubble {
	max-width: min(76%, 680px);
	border: 1px solid var(--border);
	border-radius: 12px 12px 12px 3px;
	background: var(--card);
	padding: 9px 12px;
	font-size: 14px;
	white-space: pre-wrap;
}

.ai-message-user .ai-message-bubble {
	border-color: var(--accent);
	border-radius: 12px 12px 3px 12px;
	background: var(--accent);
	color: #ffffff;
}

.ai-thinking {
	display: flex;
	align-items: center;
	gap: 5px;
	border-top: 1px solid var(--border);
	padding: 8px 16px 0 16px;
	color: var(--muted);
	font-size: 12px;
}

.ai-thinking-label {
	margin-right: 2px;
}

.ai-thinking-dot {
	width: 5px;
	height: 5px;
	border-radius: 50%;
	background: var(--accent);
	animation: ai-thinking-dot 1s infinite ease-in-out;
}

.ai-thinking-dot:nth-child(3) {
	animation-delay: 0.15s;
}

.ai-thinking-dot:nth-child(4) {
	animation-delay: 0.3s;
}

.ai-confirm-row {
	display: flex;
	justify-content: flex-start;
	border-top: 1px solid var(--border);
	padding: 10px 16px 0 16px;
}

.ai-rule-preview {
	border-top: 1px solid var(--border);
	background: #f4f8ff;
	padding: 12px 16px;
	font-size: 13px;
}

.ai-preview-step {
	margin-top: 8px;
}

.ai-preview-step ul {
	margin: 5px 0 0 18px;
	padding: 0;
}

.ai-confirm-button {
	border-color: var(--accent);
	color: var(--accent);
	font-weight: 600;
}

.ai-chat-form {
	display: flex;
	gap: 8px;
	padding: 12px 16px 16px 16px;
}

.ai-chat-form input {
	min-width: 0;
	flex: 1;
	padding: 9px 11px;
}

@keyframes ai-thinking-dot {
	0%,
	60%,
	100% {
		transform: translateY(0);
		opacity: 0.45;
	}

	30% {
		transform: translateY(-3px);
		opacity: 1;
	}
}

.custom-step-routing {
	display: grid;
	gap: 7px;
	background: var(--background);
	border-left: 3px solid var(--accent);
	border-radius: 6px;
	margin-top: 12px;
	padding: 10px 12px;
}

.routing-selector {
	display: flex;
	align-items: center;
	gap: 10px;
	flex-wrap: wrap;
	margin-bottom: 2px;
}

.routing-selector label {
	font-weight: 600;
}

.temporal-tolerance input[type="number"] {
	width: 100px;
}

.condition-error {
	background: var(--error-bg);
	border: 1px solid var(--error);
	color: var(--error);
	border-radius: 6px;
	padding: 8px 10px;
	margin-top: 8px;
	font-size: 13px;
}

.condition-block {
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 10px 12px;
	margin-bottom: 12px;
}

.condition-block .condition-header {
	display: flex;
	align-items: center;
	gap: 10px;
	margin-bottom: 8px;
}

.condition-block .condition-header strong {
	margin-right: auto;
}

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

.operand-box {
	border: 1px dashed var(--border);
	border-radius: 6px;
	padding: 8px 10px;
}

.operand-box .operand-title {
	font-size: 13px;
	font-weight: 600;
	margin-bottom: 6px;
}

.transformation-row {
	display: flex;
	align-items: center;
	gap: 6px;
	margin-bottom: 6px;
}

.transformation-row input {
	width: 96px;
}

.error-box {
	background: var(--unmatch-bg);
	border: 1px solid var(--unmatch);
	color: var(--unmatch);
	border-radius: 8px;
	padding: 10px 14px;
	margin-top: 12px;
	max-width: 640px;
}

.execution-header {
	display: flex;
	gap: 10px;
	flex-wrap: wrap;
	margin-bottom: 14px;
}

.chip {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 999px;
	padding: 3px 12px;
	font-size: 12px;
	color: var(--muted);
}

.result-card {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 12px 14px;
	margin-bottom: 12px;
}

.result-header {
	display: flex;
	align-items: center;
	gap: 12px;
	flex-wrap: wrap;
}

.result-header strong {
	font-size: 15px;
}

.badge {
	border-radius: 999px;
	padding: 2px 12px;
	font-size: 12px;
	font-weight: 600;
}

.badge.match {
	background: var(--match-bg);
	color: var(--match);
}

.badge.unmatch {
	background: var(--unmatch-bg);
	color: var(--unmatch);
}

.badge.error {
	background: var(--error-bg);
	color: var(--error);
}

.matched-line {
	color: var(--muted);
	font-size: 13px;
	margin: 4px 0;
}

.explanation {
	margin: 6px 0 2px 0;
}

details {
	margin-top: 8px;
}

summary {
	cursor: pointer;
	color: var(--accent);
	font-size: 13px;
}

.attempt {
	border-left: 3px solid var(--border);
	padding-left: 10px;
	margin: 8px 0;
}

.attempt-line {
	font-size: 13px;
	margin: 0 0 4px 0;
}

.hidden {
	display: none;
}

@media (prefers-reduced-motion: reduce) {
	.ai-thinking-dot {
		animation: none;
	}
}

@media (max-width: 700px) {
	.read-only-source-pair,
	.read-only-condition {
		grid-template-columns: 1fr;
	}

	.source-pair-connector {
		justify-self: center;
		transform: rotate(90deg);
	}

	.read-only-operand,
	.read-only-operand:last-child {
		text-align: left;
	}

	.ai-message-bubble {
		max-width: 90%;
	}
}