:root {
	color-scheme: dark;
	--bg: #0d1117;
	--bg-raised: #161b22;
	--border: #30363d;
	--text: #e6edf3;
	--muted: #8b949e;
	--accent: #58a6ff;
	--accent-strong: #1f6feb;
	--error: #ff7b72;
}

* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	height: 100%;
}

body {
	background: var(--bg);
	color: var(--text);
	font-family:
		system-ui,
		-apple-system,
		"Segoe UI",
		Roboto,
		Helvetica,
		Arial,
		sans-serif;
}

/* ---------- landing page ---------- */

body.home {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 24px;
	background:
		radial-gradient(1000px 500px at 50% -10%, #16305a 0%, transparent 60%),
		var(--bg);
}

.hero {
	width: min(680px, 100%);
	text-align: center;
}

.hero h1 {
	margin: 0 0 8px;
	font-size: clamp(2rem, 6vw, 3rem);
	letter-spacing: -0.02em;
}

.accent {
	color: var(--accent);
}

.tagline {
	margin: 0 0 28px;
	color: var(--muted);
	line-height: 1.5;
}

#sj-form {
	display: flex;
	gap: 8px;
}

#sj-address {
	flex: 1;
	min-width: 0;
	padding: 13px 16px;
	font-size: 16px;
	color: var(--text);
	background: var(--bg-raised);
	border: 1px solid var(--border);
	border-radius: 10px;
	outline: none;
	transition: border-color 0.15s;
}

#sj-address:focus {
	border-color: var(--accent);
}

#sj-form button {
	padding: 0 22px;
	font-size: 16px;
	font-weight: 600;
	color: #fff;
	background: var(--accent-strong);
	border: 1px solid var(--accent-strong);
	border-radius: 10px;
	cursor: pointer;
}

#sj-form button:hover {
	background: #388bfd;
	border-color: #388bfd;
}

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

code {
	padding: 1px 5px;
	font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	font-size: 0.92em;
	color: var(--accent);
	background: rgba(110, 118, 129, 0.2);
	border-radius: 6px;
}

.features {
	margin: 32px auto 0;
	padding: 0;
	list-style: none;
	text-align: left;
	color: var(--muted);
	font-size: 14px;
	line-height: 2;
	max-width: 460px;
}

.features li::before {
	content: "\2713\00a0";
	color: #3fb950;
}

.status {
	margin-top: 26px;
	font-size: 14px;
	color: var(--muted);
}

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

/* ---------- proxy page ---------- */

body.proxy {
	display: flex;
	flex-direction: column;
	overflow: hidden;
}

.error {
	margin: 0;
	padding: 12px 16px;
	font-size: 14px;
	color: var(--error);
	background: rgba(255, 123, 114, 0.1);
	border-bottom: 1px solid var(--border);
	flex: none;
}

.error.sj-status {
	color: var(--muted);
	background: transparent;
}

.frame-container {
	position: relative;
	flex: 1;
	min-height: 0;
}

#sj-frame {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	border: 0;
	background: #fff;
}