:root {
	color-scheme: light dark;
	font-family: Inter, system-ui, sans-serif;
	--bg-start: #f7f9fc;
	--bg-end: #e8eef6;
	--text: #17202a;
	--muted: #516171;
	--panel-bg: rgba(255, 255, 255, 0.9);
	--border: #bfccd9;
	--input-bg: #ffffff;
	--link: #235fc7;
	--code: #235fc7;
	--button-bg: #2f6df6;
	--button-text: #ffffff;
	--shadow: rgba(24, 39, 56, 0.14);
	--trace-bg: #ffffff;
	background: var(--bg-start);
	color: var(--text);
}

@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) {
		--bg-start: #10141a;
		--bg-end: #17212b;
		--text: #e8edf2;
		--muted: #9fb1c1;
		--panel-bg: rgba(12, 18, 24, 0.86);
		--border: #3c4d60;
		--input-bg: #0a0f14;
		--link: #9ec1ff;
		--code: #9ec1ff;
		--button-bg: #3a7afe;
		--button-text: #ffffff;
		--shadow: rgba(0, 0, 0, 0.18);
		--trace-bg: #ffffff;
	}
}

:root[data-theme="dark"] {
	--bg-start: #10141a;
	--bg-end: #17212b;
	--text: #e8edf2;
	--muted: #9fb1c1;
	--panel-bg: rgba(12, 18, 24, 0.86);
	--border: #3c4d60;
	--input-bg: #0a0f14;
	--link: #9ec1ff;
	--code: #9ec1ff;
	--button-bg: #3a7afe;
	--button-text: #ffffff;
	--shadow: rgba(0, 0, 0, 0.18);
	--trace-bg: #ffffff;
}

:root[data-theme="light"] {
	color-scheme: light;
}

:root[data-theme="dark"] {
	color-scheme: dark;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	min-height: 100vh;
	background: linear-gradient(180deg, var(--bg-start), var(--bg-end));
	color: var(--text);
}

.page {
	max-width: 1600px;
	margin: 0 auto;
	padding: 32px 20px;
	display: grid;
	gap: 20px;
}

.panel {
	background: var(--panel-bg);
	border: 1px solid var(--border);
	border-radius: 14px;
	padding: 20px;
	box-shadow: 0 16px 40px var(--shadow);
}

.header-row {
	display: flex;
	justify-content: space-between;
	gap: 24px;
	align-items: flex-start;
	flex-wrap: wrap;
}

.subtitle {
	margin-top: 0;
	color: var(--muted);
}

a {
	color: var(--link);
}

label {
	display: block;
	margin: 14px 0 8px;
	font-weight: 600;
}

.theme-toggle {
	display: inline-flex;
	gap: 6px;
	align-items: center;
	justify-content: center;
	width: auto;
	padding: 8px 10px;
	border: 1px solid var(--border);
	border-radius: 999px;
	background: var(--input-bg);
	color: var(--muted);
}

.theme-toggle:hover {
	color: var(--text);
}

.theme-icon {
	opacity: 0.38;
	transition:
		opacity 120ms ease,
		transform 120ms ease;
}

.theme-toggle[data-theme="light"] .theme-icon-light,
.theme-toggle[data-theme="dark"] .theme-icon-dark,
.theme-toggle[data-theme="system"] .theme-icon-system {
	opacity: 1;
	transform: scale(1.12);
	color: var(--button-bg);
}

textarea,
input,
select,
button,
pre {
	width: 100%;
	border-radius: 10px;
	border: 1px solid var(--border);
	background: var(--input-bg);
	color: inherit;
	font: inherit;
}

textarea,
input,
select,
pre {
	padding: 12px;
}

.sample-box {
	border: 1px solid var(--border);
	border-radius: 10px;
	background: var(--input-bg);
	padding: 12px;
}

code {
	color: var(--code);
}

button {
	width: auto;
	padding: 12px 18px;
	cursor: pointer;
	background: var(--button-bg);
	color: var(--button-text);
	border: none;
	font-weight: 700;
}

button:disabled {
	cursor: wait;
	opacity: 0.7;
}

.actions {
	margin-top: 18px;
	display: flex;
	gap: 16px;
	align-items: center;
	flex-wrap: wrap;
}

#status {
	color: var(--muted);
}

pre {
	min-height: 320px;
	overflow: auto;
	white-space: pre-wrap;
}

.result-header {
	display: flex;
	justify-content: space-between;
	gap: 16px;
	align-items: center;
	flex-wrap: wrap;
}

.tabs {
	display: flex;
	gap: 8px;
}

.tab {
	border: 1px solid var(--border);
	background: var(--input-bg);
	color: var(--text);
}

.tab.active {
	background: var(--button-bg);
	color: var(--button-text);
}

.tab-panel[hidden] {
	display: none;
}

#trace-frame {
	width: 100%;
	min-height: 1600px;
	border: 1px solid var(--border);
	border-radius: 10px;
	background: var(--trace-bg);
}