.rk-header {
	position: sticky;
	top: 0;
	z-index: 60;
	background: linear-gradient(
		to bottom,
		rgba(7, 8, 9, 0.98),
		rgba(7, 8, 9, 0.92),
		rgba(7, 8, 9, 0.88)
	);
	backdrop-filter: blur(14px);
	border-bottom: 1px solid var(--color-border-subtle);
	box-shadow: 0 12px 26px rgba(0, 0, 0, 0.85);
}
.rk-header-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	min-height: 64px;
	padding-top: var(--space-3);
	padding-bottom: var(--space-3);
	gap: var(--space-4);
}
.rk-logo {
	display: inline-flex;
	align-items: center;
	gap: var(--space-3);
	padding: 4px 10px;
	border-radius: 999px;
	background:
		radial-gradient(circle at 0 0, rgba(198, 255, 0, 0.16) 0, transparent 55%),
		radial-gradient(
			circle at 100% 100%,
			rgba(255, 203, 60, 0.16) 0,
			transparent 52%
		),
		#050607;
	box-shadow: var(--shadow-sm);
	border: 1px solid rgba(198, 255, 0, 0.45);
}
.rk-logo-mark {
	width: 32px;
	height: 32px;
	border-radius: 999px;
	background: radial-gradient(
		circle at 30% 20%,
		var(--color-accent-lime) 0,
		var(--color-accent-insect) 36%,
		#020203 76%
	);
	box-shadow:
		0 0 0 2px #000,
		0 0 18px rgba(198, 255, 0, 0.9);
	position: relative;
	overflow: hidden;
}
.rk-logo-mark::before,
.rk-logo-mark::after {
	content: "";
	position: absolute;
	border-radius: 999px;
	mix-blend-mode: multiply;
	opacity: 0.9;
}
.rk-logo-mark::before {
	inset: 22% 12% 40%;
	background: radial-gradient(
		circle at 50% 0,
		#000 0,
		rgba(0, 0, 0, 0.95) 32%,
		transparent 80%
	);
}
.rk-logo-mark::after {
	inset: 56% 22% 6% 40%;
	background: radial-gradient(
		circle at 40% 50%,
		#000 0,
		rgba(0, 0, 0, 0.9) 30%,
		transparent 70%
	);
}
.rk-logo-text {
	display: flex;
	flex-direction: column;
	line-height: 1;
}
.rk-logo-title {
	font-family: var(--font-display);
	font-size: 1.25rem;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--color-accent-lime);
}
.rk-logo-subtitle {
	font-family: var(--font-mono);
	font-size: 0.65rem;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--color-text-muted);
}
.rk-nav {
	display: flex;
	align-items: center;
}
.rk-nav-list {
	display: flex;
	align-items: center;
	gap: var(--space-4);
	font-family: var(--font-rounded);
	font-size: var(--font-size-sm);
	text-transform: uppercase;
	letter-spacing: 0.12em;
}
.rk-nav-link {
	position: relative;
	padding: 6px 4px;
	color: var(--color-text-muted);
}
.rk-nav-link::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -4px;
	height: 2px;
	border-radius: 999px;
	background: linear-gradient(
		90deg,
		var(--color-accent-yellow),
		var(--color-accent-lime)
	);
	transform: scaleX(0);
	transform-origin: center;
	transition: transform var(--transition-fast);
}
.rk-nav-link:focus-visible,
.rk-nav-link:hover {
	color: var(--color-accent-lime);
}
.rk-nav-link:focus-visible::after,
.rk-nav-link:hover::after {
	transform: scaleX(1);
}
.rk-nav-highlight .rk-nav-link {
	color: var(--color-accent-yellow);
}
.rk-nav-highlight .rk-nav-link::after {
	background: linear-gradient(
		90deg,
		var(--color-accent-yellow),
		var(--color-accent-warning)
	);
}
.rk-nav-toggle {
	display: none;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	border-radius: 999px;
	border: 1px solid var(--color-border-subtle);
	background: rgba(7, 8, 9, 0.92);
	box-shadow: var(--shadow-xs);
	padding: 0;
}
.rk-nav-toggle:focus-visible {
	box-shadow: var(--ring-focus);
}
.rk-nav-toggle-bar {
	display: block;
	width: 20px;
	height: 2px;
	border-radius: 999px;
	background: var(--color-text-main);
	transition:
		transform var(--transition-fast),
		opacity var(--transition-fast),
		background var(--transition-fast);
}
.rk-nav-toggle-bar + .rk-nav-toggle-bar {
	margin-top: 4px;
}
.rk-nav-toggle[aria-expanded="true"] .rk-nav-toggle-bar:nth-child(1) {
	transform: translateY(6px) rotate(45deg);
}
.rk-nav-toggle[aria-expanded="true"] .rk-nav-toggle-bar:nth-child(2) {
	opacity: 0;
}
.rk-nav-toggle[aria-expanded="true"] .rk-nav-toggle-bar:nth-child(3) {
	transform: translateY(-6px) rotate(-45deg);
}
@media (max-width: 880px) {
	.rk-nav-toggle {
		display: inline-flex;
        		flex-direction: column;

	}
	.rk-nav {
		position: fixed;
		inset: 64px 0 auto;
		z-index: 55;
		padding: var(--space-3) var(--space-4);
		pointer-events: none;
	}
	.rk-nav-list {
		flex-direction: column;
		align-items: flex-start;
		background: #07090d;
		border-radius: 24px;
		border: 1px solid var(--color-border-subtle);
		box-shadow: var(--shadow-lg);
        width: 100%;
		padding: var(--space-4);
		gap: var(--space-3);
		transform: translateY(-12px);
		opacity: 0;
		transition:
			opacity var(--transition-normal),
			transform var(--transition-normal);
	}
	.rk-nav-link {
		padding: 6px 2px;
	}
	.rk-nav-link::after {
		bottom: -6px;
	}
	.rk-nav.is-open {
		pointer-events: auto;
	}
	.rk-nav.is-open .rk-nav-list {
		opacity: 1;
		transform: translateY(0);
	}
}
@media (max-width: 520px) {
	.rk-logo-subtitle {
		display: none;
	}
	.rk-header-inner {
		gap: var(--space-3);
	}
}