/* =============================================
   SECTION NAV — overlay (jediny fixed element)
   ============================================= */

.section-nav-overlay {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
	z-index: 9999;
}

/* =============================================
   SECTION NAV — dot navigace (sirka >= 1300px)
   ============================================= */

.section-nav {
	position: absolute;
	left: 24px;
	top: 50%;
	transform: translateY(-50%);
	max-height: 500px;
	overflow: hidden;
	display: none;
	flex-direction: column;
	align-items: flex-start;
	gap: 14px;
	padding: 0;
	background: none;
	border: none;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.4s ease;
}

@media (min-width: 1300px) {
	.section-nav {
		display: flex;
	}

	.section-nav.is-visible {
		opacity: 1;
		pointer-events: auto;
	}
}

.section-nav__item {
	display: flex;
	flex-direction: row;
	align-items: center;
	gap: 10px;
	background: none;
	border: none;
	cursor: pointer;
	padding: 4px 0;
	opacity: calc(1 - var(--distance, 0) * 0.12);
	transition: opacity 0.3s ease;
}

.section-nav__item:hover {
	opacity: 1;
}

.section-nav__chevron {
	display: block;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: rgba(0, 0, 0, 0.25);
	flex-shrink: 0;
	transition: background 0.3s ease, width 0.3s ease, height 0.3s ease;
}

.section-nav__item.is-active .section-nav__chevron {
	width: 11px;
	height: 11px;
	background: #c8860a;
}

.section-nav__item:not(.is-active):hover .section-nav__chevron {
	background: rgba(0, 0, 0, 0.5);
}

.section-nav__label {
	display: block;
	max-width: 300px;
	padding: 5px 10px;
	background: rgba(255, 255, 255, 0.92);
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
	border-radius: 6px;
	box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
	font-size: 13px;
	line-height: 1.4;
	color: #333;
	white-space: normal;
	word-break: break-word;
	opacity: 0;
	transform: translateX(-6px);
	transition: opacity 0.25s ease, transform 0.25s ease;
	pointer-events: none;
}

.section-nav__item.is-active .section-nav__label {
	opacity: 1;
	transform: translateX(0);
	pointer-events: auto;
	font-weight: 600;
	color: #c8860a;
}

.section-nav__item:not(.is-active):hover .section-nav__label {
	opacity: 0.75;
	transform: translateX(0);
	pointer-events: auto;
}

/* =============================================
   SECTION NAV — sipkova navigace (sirka < 1300px)
   ============================================= */

.section-nav-arrows-wrapper {
	/* position: fixed primo (ne absolute uvnitr overlay) — jinak prohlizec
	   meni vysku overlay pri scrollu (URL bar), coz zpusobi poskakivani */
	position: fixed;
	bottom: 300px;
	left: 24px;
	display: none;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.3s ease;
}

@media (max-width: 1299px) {
	.section-nav-arrows-wrapper {
		display: block;
	}

	.section-nav-arrows-wrapper.is-visible {
		opacity: 1;
		pointer-events: auto;
	}
}

/* sipka pres ::before — absolutni centrovani + translate PRED rotate
   (translate v prostoru obrazovky, ne v rotovanem) → rotace bez oblouku */
/* specificita 0,3,2 (wrapper.class + button.class) prebije bezne
   oxygen/theme selektory jako .ct-section button nebo .oxy-button */
.section-nav-arrows-wrapper button.section-nav-arrow,
.section-nav-arrows-wrapper button.section-nav-arrow:hover,
.section-nav-arrows-wrapper button.section-nav-arrow:focus,
.section-nav-arrows-wrapper button.section-nav-arrow:active {
	position: relative;
	width: 48px;
	height: 48px;
	border-radius: 50%;
	background: #fff;
	border: none;
	box-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
	outline: none;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: opacity 0.2s ease;
	/* vlastni compositing layer — pomaha s mobile renderingem */
	transform: translateZ(0);
}

.section-nav-arrow::before {
	content: '';
	position: absolute;
	inset: 0;
	margin: auto;
	width: 12px;
	height: 12px;
	border-right: 2.5px solid #222;
	border-bottom: 2.5px solid #222;
	transform: translateY(-2px) rotate(45deg); /* dolu */
	transition: transform 0.25s ease;
}

.section-nav-arrow.is-up::before {
	transform: translateY(-2px) rotate(-135deg); /* nahoru */
}