/* Header specific styles for OSK SIGMA ANDRZEJ SZCZECIŃSKI */

.site-header {
	position: sticky;
	top: 0;
	z-index: 40;
	backdrop-filter: blur(18px);
	background: linear-gradient(
		to bottom,
		rgba(5, 5, 9, 0.96),
		rgba(5, 5, 9, 0.86)
	);
	border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-block: var(--space-3);
	gap: var(--space-4);
}

.site-header__brand {
	display: flex;
	align-items: center;
	min-width: 0;
}

.site-header__logo-link {
	display: inline-flex;
	align-items: center;
	gap: var(--space-3);
	color: var(--color-text);
}

.site-header__logo-mark {
	width: 34px;
	height: 34px;
	border-radius: 12px;
	background: conic-gradient(
		from 210deg,
		var(--color-primary),
		var(--color-accent-purple),
		var(--color-accent-red),
		var(--color-primary)
	);
	box-shadow: var(--shadow-glow-purple);
	position: relative;
}

.site-header__logo-mark::after {
	content: "";
	position: absolute;
	inset: 4px;
	border-radius: 9px;
	background:
		radial-gradient(
			circle at 30% 20%,
			rgba(255, 255, 255, 0.2),
			transparent 55%
		),
		radial-gradient(circle at 70% 80%, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.98));
}

.site-header__logo-text {
	display: inline-flex;
	flex-direction: column;
	gap: 2px;
}

.site-header__logo-main {
	font-family: var(--font-display);
	font-size: var(--font-size-lg);
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.site-header__logo-sub {
	font-size: var(--font-size-xs);
	text-transform: uppercase;
	letter-spacing: 0.16em;
	color: var(--color-text-soft);
}

.site-header__nav {
	display: flex;
	align-items: center;
	gap: var(--space-5);
}

.site-header__nav-list {
	display: flex;
	align-items: center;
	gap: var(--space-4);
	list-style: none;
}

.site-header__nav-link {
	position: relative;
	font-size: var(--font-size-sm);
	text-transform: uppercase;
	letter-spacing: 0.14em;
	color: var(--color-text-muted);
	padding-block: 0.25rem;
}

.site-header__nav-link::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -0.3rem;
	height: 2px;
	border-radius: 999px;
	background: linear-gradient(
		90deg,
		var(--color-primary),
		var(--color-accent-purple)
	);
	transform: scaleX(0);
	transform-origin: center;
	transition: transform var(--transition-normal);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
	color: var(--color-text);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
	transform: scaleX(1);
}

.site-header__cta-group {
	display: flex;
	align-items: center;
	gap: var(--space-3);
}

/* Mobile toggle button */

.site-header__toggle {
	display: none;
	position: relative;
	width: 42px;
	height: 32px;
	border-radius: var(--radius-pill);
	border: 1px solid var(--color-border-subtle);
	background: rgba(8, 8, 18, 0.94);
	align-items: center;
	justify-content: center;
	flex-direction: column;
	gap: 4px;
	padding: 4px 8px;
	color: var(--color-text);
}

.site-header__toggle-bar {
	width: 100%;
	height: 2px;
	border-radius: 999px;
	background: linear-gradient(
		90deg,
		var(--color-primary),
		var(--color-accent-purple)
	);
	transition:
		transform var(--transition-fast),
		opacity var(--transition-fast),
		translate var(--transition-fast);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(1) {
	transform: translateY(4px) rotate(45deg);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(2) {
	opacity: 0;
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(3) {
	transform: translateY(-4px) rotate(-45deg);
}

/* Responsive */

@media (max-width: 960px) {
	.site-header__inner {
		padding-block: var(--space-2);
	}

	.site-header__toggle {
		display: inline-flex;
	}

	.site-header__nav {
		position: fixed;
		inset-inline: 0;
		top: 60px;
		background:
			radial-gradient(circle at top, rgba(76, 111, 255, 0.12), transparent 55%),
			radial-gradient(
				circle at bottom,
				rgba(255, 20, 81, 0.1),
				transparent 55%
			),
			rgba(5, 5, 12, 0.98);
		border-top: 1px solid var(--color-border-subtle);
		flex-direction: column;
		align-items: stretch;
		padding: var(--space-4) var(--space-4) var(--space-6);
		gap: var(--space-4);
		max-height: 0;
		overflow: hidden;
		opacity: 0;
		transform: translateY(-6px);
		transition:
			max-height var(--transition-slow),
			opacity var(--transition-normal),
			transform var(--transition-normal);
	}

	.site-header__nav-list {
		flex-direction: column;
		align-items: flex-start;
		gap: var(--space-3);
	}

	.site-header__nav-link {
		font-size: var(--font-size-md);
	}

	.site-header__cta-group {
		justify-content: flex-start;
	}

	.site-header__nav.is-open {
		max-height: 420px;
		opacity: 1;
		transform: translateY(0);
	}
}

@media (max-width: 520px) {
	.site-header__logo-sub {
		display: none;
	}
}

/* Utility state for locking scroll when nav is open on mobile */

body.nav-open {
	overflow: hidden;
}