/* Sitewide signal-waveform navigation. */
body.dsrt-signal-header-page {
	--dsrt-signal-header-height: 92px;
	padding-top: var(--dsrt-signal-header-height);
}

.dsrt-signal-header {
	--dsrt-signal-current: #7597aa;
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 50;
	height: var(--dsrt-signal-header-height, 92px);
	display: grid;
	grid-template-columns: minmax(190px, 236px) minmax(0, 1fr);
	align-items: center;
	gap: clamp(8px, 1.8vw, 24px);
	padding: 0 clamp(14px, 3vw, 34px);
	background:
		repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 4px),
		linear-gradient(180deg, rgba(41, 44, 47, 0.985), rgba(24, 26, 28, 0.99));
	border-top: 1px solid rgba(218, 218, 211, 0.18);
	border-bottom: 1px solid rgba(145, 164, 152, 0.5);
	box-shadow: 0 12px 30px rgba(0, 0, 0, 0.58);
}

body.admin-bar .dsrt-signal-header { top: 32px; }

.dsrt-signal-header__brand {
	position: relative;
	z-index: 3;
	display: inline-flex;
	align-items: center;
	width: max-content;
	max-width: 100%;
	color: #1f2021;
	text-decoration: none;
}

.dsrt-signal-header__brand::after {
	content: "";
	position: absolute;
	left: calc(100% - 6px);
	top: 50%;
	width: clamp(32px, 4vw, 62px);
	border-top: 2px solid #b89ca6;
	transform: rotate(4deg);
	transform-origin: left center;
	z-index: -1;
}

.dsrt-signal-header__tape {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 44px;
	padding: 9px clamp(18px, 2vw, 28px);
	background: linear-gradient(100deg, #929694, #d1d3d0 17%, #c0c3c0 82%, #898d8b);
	clip-path: polygon(1% 7%, 98% 0, 100% 91%, 2% 100%, 0 55%);
	box-shadow: 0 3px 7px rgba(0, 0, 0, 0.55);
	transform: rotate(-1deg);
}

.dsrt-signal-header__wordmark {
	font-family: var(--ad-font-display, Georgia, serif);
	font-size: clamp(1rem, 1.45vw, 1.18rem);
	font-weight: 700;
	letter-spacing: 0.025em;
	white-space: nowrap;
	text-shadow: 0 1px rgba(255, 255, 255, 0.45);
}

.dsrt-signal-header__wordmark em {
	font-style: italic;
	font-weight: 700;
	color: #3c4140;
}

.dsrt-signal-header__field {
	position: relative;
	min-width: 0;
	height: 78px;
}

.dsrt-signal-wave {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	overflow: visible;
	pointer-events: none;
}

.dsrt-signal-wave__baseline {
	fill: none;
	stroke: rgba(145, 164, 152, 0.42);
	stroke-width: 0.7;
}

.dsrt-signal-wave__trace {
	fill: none;
	stroke: #b89ca6;
	stroke-width: 1.8;
	vector-effect: non-scaling-stroke;
	filter: drop-shadow(0 0 4px rgba(184, 156, 166, 0.34));
}

.dsrt-signal-nav { position: absolute; inset: 0; }

.dsrt-signal-nav__list {
	list-style: none;
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	align-items: center;
	height: 100%;
	margin: 0;
	padding: 0;
}

.dsrt-signal-nav__item {
	min-width: 0;
	display: flex;
	justify-content: center;
}

.dsrt-signal-nav__item:nth-child(1) { transform: translateY(13px); }
.dsrt-signal-nav__item:nth-child(2) { transform: translateY(-10px); }
.dsrt-signal-nav__item:nth-child(3) { transform: translateY(17px); }
.dsrt-signal-nav__item:nth-child(4) { transform: translateY(-2px); }

.dsrt-signal-nav__link {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	min-width: 0;
	padding: 6px 8px;
	border: 1px solid rgba(145, 164, 152, 0.52);
	background: rgba(32, 35, 38, 0.94);
	color: #eeeae2;
	font-family: var(--ad-font-body, sans-serif);
	font-size: clamp(0.68rem, 0.9vw, 0.84rem);
	font-weight: 700;
	letter-spacing: 0.055em;
	line-height: 1;
	text-decoration: none;
	text-transform: uppercase;
	box-shadow: 0 0 0 3px rgba(32, 35, 38, 0.9);
	transition: color 180ms ease, background 180ms ease, border-color 180ms ease, padding 180ms ease;
}

.dsrt-signal-nav__link:hover,
.dsrt-signal-nav__link:focus-visible,
.dsrt-signal-nav__link[aria-current="page"] {
	padding-inline: 12px;
	border-color: #deded9;
	background: #deded9;
	color: #202326;
}

.dsrt-signal-nav__link:focus-visible {
	outline: 2px solid #b89ca6;
	outline-offset: 4px;
}

/* Current is a persistent cool-blue signal; hover remains neutral paper gray. */
body .dsrt-signal-nav__link[aria-current="page"] {
	border-color: #c6dbe5;
	background: var(--dsrt-signal-current);
	color: #11171b;
	box-shadow:
		0 0 0 3px rgba(32, 35, 38, 0.9),
		0 0 15px rgba(117, 151, 170, 0.34);
}

.dsrt-signal-meter {
	display: inline-flex;
	align-items: flex-end;
	justify-content: center;
	gap: 2px;
	width: 15px;
	height: 17px;
	flex: 0 0 15px;
}

.dsrt-signal-meter__bar {
	display: block;
	width: 3px;
	background: #91a498;
	transition: height 180ms ease, background 180ms ease;
}

.dsrt-signal-meter__bar:nth-child(1) { height: 6px; }
.dsrt-signal-meter__bar:nth-child(2) { height: 13px; }
.dsrt-signal-meter__bar:nth-child(3) { height: 9px; }

.dsrt-signal-nav__link:hover .dsrt-signal-meter__bar,
.dsrt-signal-nav__link:focus-visible .dsrt-signal-meter__bar,
.dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar { background: #8b6574; }

body .dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar {
	background: #21333d;
	transform-origin: center bottom;
	animation: dsrt-current-level 1.8s ease-in-out infinite alternate;
}

body .dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar:nth-child(2) { animation-delay: -0.55s; }
body .dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar:nth-child(3) { animation-delay: -1.1s; }

@keyframes dsrt-current-level {
	from { transform: scaleY(0.82); }
	to { transform: scaleY(1); }
}

.dsrt-signal-nav__link:hover .dsrt-signal-meter__bar:nth-child(1),
.dsrt-signal-nav__link:focus-visible .dsrt-signal-meter__bar:nth-child(1),
.dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar:nth-child(1) { height: 13px; }

.dsrt-signal-nav__link:hover .dsrt-signal-meter__bar:nth-child(2),
.dsrt-signal-nav__link:focus-visible .dsrt-signal-meter__bar:nth-child(2),
.dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar:nth-child(2) { height: 8px; }

.dsrt-signal-nav__link:hover .dsrt-signal-meter__bar:nth-child(3),
.dsrt-signal-nav__link:focus-visible .dsrt-signal-meter__bar:nth-child(3),
.dsrt-signal-nav__link[aria-current="page"] .dsrt-signal-meter__bar:nth-child(3) { height: 16px; }

@media (max-width: 700px) {
	body.dsrt-signal-header-page { --dsrt-signal-header-height: 126px; }
	body.admin-bar .dsrt-signal-header { top: 46px; }

	.dsrt-signal-header {
		grid-template-columns: 1fr;
		grid-template-rows: 48px 67px;
		gap: 0;
		padding: 6px 8px;
	}

	.dsrt-signal-header__brand { align-self: start; }
	.dsrt-signal-header__brand::after { width: 44px; }
	.dsrt-signal-header__tape { min-height: 38px; padding: 7px 18px; }
	.dsrt-signal-header__wordmark { font-size: 0.92rem; }
	.dsrt-signal-header__field { height: 67px; }
	.dsrt-signal-nav__item:nth-child(1) { transform: translateY(8px); }
	.dsrt-signal-nav__item:nth-child(2) { transform: translateY(-5px); }
	.dsrt-signal-nav__item:nth-child(3) { transform: translateY(10px); }
	.dsrt-signal-nav__item:nth-child(4) { transform: translateY(-1px); }

	body .dsrt-signal-nav__link {
		gap: 4px;
		padding: 5px 4px;
		font-size: clamp(0.64rem, 2.9vw, 0.76rem);
		letter-spacing: 0.025em;
		box-shadow: 0 0 0 2px rgba(32, 35, 38, 0.9);
	}

	.dsrt-signal-nav__link:hover,
	.dsrt-signal-nav__link:focus-visible,
	.dsrt-signal-nav__link[aria-current="page"] { padding-inline: 5px; }

	.dsrt-signal-meter { width: 11px; height: 15px; flex-basis: 11px; gap: 1px; }
	.dsrt-signal-meter__bar { width: 3px; }
}

@media (prefers-reduced-motion: reduce) {
	.dsrt-signal-header__brand,
	.dsrt-signal-nav__link,
	.dsrt-signal-meter__bar {
		animation: none !important;
		transition: none !important;
	}
}