/* Layout global y cabecera fija */

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	background: #f4f5f7;
	color: #222;
}

.site-header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	height: 64px;
	background: #111827;
	color: #fff;
	z-index: 1000;
	box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18);
}

.site-header-inner {
	max-width: 1100px;
	margin: 0 auto;
	height: 64px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0 1.5rem;
}

.site-logo a {
	color: #f9fafb;
	text-decoration: none;
	font-weight: 700;
	font-size: 1.25rem;
	letter-spacing: 0.03em;
}

.site-nav ul {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	gap: 1.25rem;
}

.site-nav a {
	color: #e5e7eb;
	text-decoration: none;
	font-size: 0.95rem;
	padding-bottom: 2px;
	border-bottom: 2px solid transparent;
	transition: color 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover {
	color: #fff;
	border-bottom-color: #3b82f6;
}

.site-main {
	padding-top: 80px;
}

@media (max-width: 768px) {
	.site-header-inner {
		padding: 0 1rem;
	}

	.site-nav ul {
		gap: 0.75rem;
		font-size: 0.9rem;
	}
}