/* ── Use-Cases / Branchen — Navy-Band mit horizontaler Rail ──────────────────
   Full-Bleed: das Navy-Band läuft edge-to-edge, die Karten-Schiene startet am
   Raster und läuft rechts über den Rand hinaus (Produktionslinie-Metapher).
   Steuerung (Pfeile + Fortschritt) via usecases-rail.js. Nur auf produktseite/cd.html. */

.usecases {
	background: var(--c-navy);
	padding-block: 3.5rem;
	overflow: hidden; /* schützt den Body vor horizontalem Overflow der Rail */
}

/* Header & Controls am 75rem-Raster ausgerichtet (wie .container) */
.usecases__header {
	max-width: var(--maxw);
	margin-inline: auto;
	padding-inline: 1.5rem;
	margin-bottom: 1.75rem;
}

.usecases__eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--c-blue-bright);
	margin-bottom: 0.75rem;
}

.usecases__eyebrow::before {
	content: "";
	width: 2rem;
	height: 0.125rem;
	background: var(--c-blue-bright);
}

.usecases__lead {
	color: rgba(var(--c-white-rgb) / 0.72);
	margin: 0;
	max-width: 38rem;
}

/* Die Schiene: bricht aus, Inhalt startet exakt an der Container-Kante */
.usecases__rail {
	/* linkes Padding = Abstand Viewport-Rand → Container-Inhalt, damit die erste
	   Karte unter dem Header sitzt. scroll-padding-left spiegelt das, sonst würde
	   der Snap die erste Karte an den Viewport-Rand ziehen (Padding „verschluckt"). */
	--rail-pad: max(1.5rem, calc((100% - var(--maxw)) / 2 + 1.5rem));
	display: flex;
	gap: 1.25rem;
	overflow-x: auto;
	scroll-snap-type: x proximity;
	scroll-padding-left: var(--rail-pad);
	scroll-behavior: smooth;
	padding-block: 0.25rem 1.5rem;
	padding-left: var(--rail-pad);
	padding-right: 1.5rem;
	scrollbar-width: none; /* eigene Steuerung darunter */
}

.usecases__rail::-webkit-scrollbar {
	display: none;
}

.usecases__rail:focus-visible {
	outline: 0.1875rem solid var(--c-blue-bright);
	outline-offset: 0.25rem;
}

.usecase-card {
	flex: 0 0 21rem;
	scroll-snap-align: start;
	display: flex;
	flex-direction: column;
	background: var(--c-surface);
	overflow: hidden;
	box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.25);
}

.usecase-card__img {
	width: 100%;
	aspect-ratio: 4 / 3;
	object-fit: cover;
	display: block;
}

.usecase-card__body {
	padding: 1.25rem;
	flex: 1;
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
}

.usecase-card__label {
	display: inline-block;
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--c-primary);
}

.usecase-card__title {
	font-size: var(--fs-h3);
	color: var(--c-text);
	margin: 0;
}

.usecase-card__problem {
	font-size: 0.875rem;
	color: var(--c-text);
	opacity: 0.8;
	margin: 0;
	flex: 1;
}

.usecase-card__solution {
	font-size: 0.8125rem;
	font-weight: 600;
	color: var(--c-primary);
	margin: 0;
	padding-top: 0.5rem;
	border-top: 0.0625rem solid var(--c-divider);
}

/* Steuerung — Pfeile + Fortschrittsleiste, am Raster */
.usecases__controls {
	max-width: var(--maxw);
	margin-inline: auto;
	padding-inline: 1.5rem;
	margin-top: 1.25rem;
	display: flex;
	align-items: center;
	gap: 1rem;
}

.usecases__progress {
	flex: 1;
	height: 0.1875rem;
	background: rgba(var(--c-white-rgb) / 0.18);
	border-radius: 1rem;
	overflow: hidden;
}

.usecases__progress-bar {
	height: 100%;
	width: 35%;
	background: var(--c-blue-bright);
	border-radius: 1rem;
	transition: width 0.15s ease, margin-left 0.15s ease;
}

.rail-btn {
	flex-shrink: 0;
	width: 2.75rem;
	height: 2.75rem;
	border-radius: 50%;
	border: 0.0625rem solid rgba(var(--c-white-rgb) / 0.35);
	background: transparent;
	color: var(--c-white);
	font-size: 1.25rem;
	line-height: 1;
	cursor: pointer;
	display: grid;
	place-items: center;
	transition: background-color 0.15s ease, border-color 0.15s ease;
}

.rail-btn:hover {
	background: rgba(var(--c-white-rgb) / 0.12);
}

.rail-btn:focus-visible {
	outline: 0.1875rem solid var(--c-blue-bright);
	outline-offset: 0.125rem;
}

.rail-btn[disabled] {
	opacity: 0.3;
	cursor: default;
}

@media (prefers-reduced-motion: reduce) {
	.usecases__rail {
		scroll-behavior: auto;
	}
}