:root {
	/* Brand colors */
	--accent: #6cdb70;
	--accent-hover: #58c45f;
	--stop: #e74c3c;
	--stop-hover: #c0392b;

	/* UI palette */
	--bg: #f3f5f7;
	--text: #333;
	--muted: #777;
	--card-bg: #fff;
	--footer-bg: var(--accent);
	--result-bg: #fafafa;

	/* Common tokens */
	--border: #e5e5e5;
	--row-border: #eee;
	--input-bg: #fff;
	--input-border: #ccc;
	--input-focus-shadow: 0 0 4px rgba(108,219,112,0.5);
	--disabled-bg: #b2b2b2;
	--result-text: #444;
	--box-shadow: 0 4px 10px rgba(0,0,0,0.05);
	--shadow: rgba(0,0,0,0.1);
}

/* Dark theme variables only */
@media (prefers-color-scheme: dark) {
	:root {
		/* Brand colors */
		--accent: hsl(140,50%,28%);
		--accent-hover: hsl(140,50%,32%);
		--stop: hsl(6,60%,30%);
		--stop-hover: hsl(6,60%,36%);

		/* UI palette */
		--bg: #0f1416;
		--text: #d8dbdc;
		--muted: #9aa0a6;
		--card-bg: #1c2225;
		--result-bg: #101518;

		/* Common tokens */
		--border: rgba(255,255,255,0.06);
		--row-border: rgba(255,255,255,0.03);
		--input-bg: var(--card-bg);
		--input-border: var(--border);
		--input-focus-shadow: 0 0 4px rgba(79,181,98,0.4);
		--shadow: rgba(0,0,0,0.55);
		--result-text: #d8dbdc;
	}
}

/* Global resets */
* { box-sizing: border-box; }
body {
	background-color: var(--bg);
	color: var(--text);
	font-family: "Segoe UI", Arial, sans-serif;
	margin: 0;
	padding: 0;
	line-height: 1.6;
}

/* Header */
header {
	background-color: var(--card-bg);
	border-bottom: 1px solid var(--border);
	box-shadow: 0 4px 10px var(--shadow);
}
header .container {
	max-width: 600px;
	margin: 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 12px 16px;
}
header img { height: 34px; }
header nav a {
	margin-left: 20px;
	color: var(--text);
	font-weight: 600;
	text-decoration: none;
	font-size: 14px;
	transition: color 0.2s;
}
header nav a:hover { color: var(--accent); }

.banner { height: 5px; background-color: var(--accent); }

/* Layout */
main {
	max-width: 600px;
	margin: 30px auto;
	display: flex;
	flex-direction: column;
	gap: 25px;
	padding: 0 16px;
}

/* Section boxes */
.section {
	background-color: var(--card-bg);
	border-radius: 10px;
	box-shadow: var(--box-shadow);
	padding: 24px 28px;
}
.section h2 {
	margin-top: 0;
	color: var(--accent);
	font-size: 18px;
}

/* Info table */
table.info {
	width: 100%;
	border-collapse: collapse;
	margin-top: 12px;
}
table.info td {
	padding: 8px 10px;
	border-bottom: 1px solid var(--row-border);
	font-size: 14px;
}
table.info td:first-child {
	width: 35%;
	color: var(--muted);
	font-weight: 500;
}

/* Form */
input[type=text] {
	flex: 1;
	min-width: 150px;
	padding: 10px 12px;
	border: 1px solid var(--input-border);
	border-radius: 6px;
	font-size: 14px;
	background-color: var(--input-bg);
	color: var(--text);
	outline: none;
	transition: border-color 0.2s, box-shadow 0.2s;
}
input[type=text]:focus {
	border-color: var(--accent);
	box-shadow: var(--input-focus-shadow);
}
input#traceroute-host, input#ping-host {
	font-family: 'Cascadia Code', 'Cascadia Console', Consolas, monospace;
}

/* Select element */
select {
	background-color: var(--input-bg);
	color: var(--text);
	border: 1px solid var(--input-border);
	border-radius: 6px;
	padding: 10px 12px;
	font-size: 14px;
	outline: none;
	transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}
select:focus {
	border-color: var(--accent);
	box-shadow: var(--input-focus-shadow);
}
select option {
	background-color: var(--card-bg);
	color: var(--text);
	font-family: "Segoe UI", Arial, sans-serif;
}
select:disabled {
	background-color: var(--disabled-bg);
	color: #fff;
	cursor: not-allowed;
}

/* Buttons */
button {
	background-color: var(--accent);
	color: var(--white);
	border: none;
	border-radius: 6px;
	padding: 10px 16px;
	font-size: 14px;
	font-weight: 600;
	cursor: pointer;
	transition: background 0.2s;
}
button:hover:not(:disabled) { background-color: var(--accent-hover); }
button:disabled {
	background-color: var(--disabled-bg);
	cursor: not-allowed;
}
button.running {
	background-color: var(--stop);
}
button.running:hover { background-color: var(--stop-hover); }
button.copy {
	margin-left: 6px;
	padding: 2px 6px;
	font-size: 0.8em;
	cursor: pointer;
}

/* code */
code {
	font-family: 'Cascadia Code', 'Cascadia Console', Consolas, monospace;
}

/* Result box */
pre {
	background-color: var(--result-bg);
	border: 1px solid var(--row-border);
	padding: 12px;
	margin: 0;
	white-space: pre-wrap;
	word-break: break-word;
	font-family: 'Cascadia Code', 'Cascadia Console', Consolas, monospace;
	font-size: 13px;
	color: var(--result-text);
	border-radius: 6px;
}

/* Footer */
footer {
	background: var(--footer-bg);
	color: var(--white);
	text-align: center;
	padding: 12px 8px;
	font-size: 13px;
	margin-top: 30px;
}
footer a {
	color: var(--white);
	text-decoration: none;
	margin: 0 8px;
	transition: text-decoration 0.2s;
}
footer a:hover { text-decoration: underline; }

#test-results {
	margin-top: -25px;
}

details {
	margin-top: 25px;
}

details summary {
	list-style: none;
	cursor: pointer;
	font-weight: 600;
	font-size: 14px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 12px;
	color: var(--text);
}

details summary::-webkit-details-marker {
	display: none;
}

/* Custom arrow for details */
details summary::after {
	content: '▾'; /* Chevron down */
	font-size: 12px;
	transition: transform 0.2s ease;
	margin-left: 8px;
}

details[open] summary::after {
	transform: rotate(180deg);
}

/* Custom select arrow */
select {
	appearance: none;
	-webkit-appearance: none;
	-moz-appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23333'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 10px center;
	background-size: 10px 6px;
	padding-right: 30px;
}