.brem-principle {
	--brem-principle-navy: #10263f;
	--brem-principle-blue: #0879c9;
	--brem-principle-blue-light: #25a6ff;
	--brem-principle-text: #26394d;
	--brem-principle-muted: #64778c;
	--brem-principle-line: #dbe5ee;
	padding: 78px 0 92px;
	color: var(--brem-principle-text);
	background: #fff;
}

.brem-principle__header {
	display: grid;
	grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
	gap: 54px;
	align-items: end;
	margin-bottom: 36px;
}

.brem-principle__eyebrow {
	margin: 0 0 16px;
	color: var(--brem-principle-blue);
	font-size: 13px;
	font-weight: 800;
	letter-spacing: 0.18em;
	text-transform: uppercase;
}

.brem-principle__title {
	margin: 0;
	color: var(--brem-principle-navy);
	font-size: clamp(32px, 4.2vw, 56px);
	line-height: 1.03;
	letter-spacing: -0.045em;
}

.brem-principle__intro {
	margin: 0;
	color: var(--brem-principle-muted);
	font-size: 18px;
	line-height: 1.7;
	max-width: 620px;
}

.brem-principle__panel {
	display: grid;
	grid-template-columns: minmax(0, 1.9fr) minmax(330px, 0.72fr);
	border: 1px solid var(--brem-principle-line);
	background: #fff;
}

.brem-principle__visual {
	min-width: 0;
	padding: 24px;
	background: linear-gradient(180deg, #fafcfd 0%, #f3f7fa 100%);
	border-right: 1px solid var(--brem-principle-line);
}

.brem-principle__stage {
	position: relative;
	width: 100%;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	background: #edf4f8;
}

.brem-principle__image {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.brem-principle__connector,
.brem-principle__motion {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
}

.brem-principle__leader-line {
	fill: none;
	stroke: var(--brem-principle-blue);
	stroke-width: 2;
	vector-effect: non-scaling-stroke;
	stroke-linecap: round;
	stroke-linejoin: round;
	transition: stroke 0.18s ease, filter 0.18s ease, opacity 0.18s ease;
}

.brem-principle__leader-target {
	fill: #fff;
	stroke: var(--brem-principle-blue);
	stroke-width: 2;
	vector-effect: non-scaling-stroke;
	transition: stroke 0.18s ease, filter 0.18s ease, opacity 0.18s ease;
}

.brem-principle__hotspot-rail {
	position: absolute;
	left: 18px;
	top: 0;
	bottom: 0;
	width: 66px;
	z-index: 5;
}

.brem-principle__hotspot {
	position: absolute;
	left: 0;
	width: 52px;
	height: 52px;
	padding: 0;
	appearance: none;
	border: 4px solid #fff;
	border-radius: 50%;
	background: var(--brem-principle-navy);
	color: #fff;
	display: flex;
	align-items: center;
	justify-content: center;
	font: inherit;
	font-size: 16px;
	font-weight: 800;
	line-height: 1;
	box-shadow: 0 4px 14px rgba(16, 38, 63, 0.22);
	cursor: pointer;
	transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.brem-principle__hotspot:nth-child(1) { top: 13%; }
.brem-principle__hotspot:nth-child(2) { top: 33%; }
.brem-principle__hotspot:nth-child(3) { top: 53%; }
.brem-principle__hotspot:nth-child(4) { top: 73%; }

.brem-principle__hotspot:hover,
.brem-principle__hotspot:focus-visible,
.brem-principle__hotspot.is-active {
	background: var(--brem-principle-blue);
	transform: scale(1.08);
	box-shadow: 0 6px 18px rgba(8, 121, 201, 0.28);
	outline: none;
}

.brem-principle__steps {
	display: flex;
	flex-direction: column;
}

.brem-principle__step {
	display: grid;
	grid-template-columns: 50px 1fr;
	gap: 16px;
	padding: 27px 26px;
	border-bottom: 1px solid var(--brem-principle-line);
	min-height: 25%;
	align-content: center;
	cursor: pointer;
	transition: background 0.18s ease, box-shadow 0.18s ease;
}

.brem-principle__step:last-child {
	border-bottom: 0;
}

.brem-principle__step:hover,
.brem-principle__step:focus-visible,
.brem-principle__step.is-active {
	background: #f3f8fc;
	box-shadow: inset 4px 0 0 var(--brem-principle-blue);
	outline: none;
}

.brem-principle__step-number {
	width: 40px;
	height: 40px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	background: #eef4f8;
	color: var(--brem-principle-navy);
	font-size: 14px;
	font-weight: 800;
	transition: background 0.18s ease, color 0.18s ease;
}

.brem-principle__step:hover .brem-principle__step-number,
.brem-principle__step:focus-visible .brem-principle__step-number,
.brem-principle__step.is-active .brem-principle__step-number {
	background: var(--brem-principle-blue);
	color: #fff;
}

.brem-principle__step-title {
	margin: 1px 0 7px;
	color: var(--brem-principle-navy);
	font-size: 20px;
	line-height: 1.2;
}

.brem-principle__step-description {
	margin: 0;
	color: var(--brem-principle-muted);
	font-size: 15px;
	line-height: 1.58;
}

.brem-principle__features {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
	border: 1px solid var(--brem-principle-line);
	border-top: 0;
}

.brem-principle__feature {
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 10px;
	padding: 18px 20px;
	border-right: 1px solid var(--brem-principle-line);
	color: #3c5670;
	font-size: 12px;
	font-weight: 800;
	letter-spacing: 0.07em;
	text-transform: uppercase;
}

.brem-principle__feature:last-child {
	border-right: 0;
}

.brem-principle__feature-dot {
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: var(--brem-principle-blue);
}

.brem-principle__leader-line.is-active {
	stroke: var(--brem-principle-blue-light);
	animation: brem-principle-leader-glow 1.15s ease-in-out infinite;
}

.brem-principle__leader-target.is-active {
	stroke: var(--brem-principle-blue-light);
	animation: brem-principle-target-pulse 1.15s ease-in-out infinite;
}

.brem-principle__motion-arrow {
	opacity: 0;
	fill: none;
	stroke: var(--brem-principle-blue-light);
	stroke-width: 3.2;
	stroke-linecap: round;
	stroke-linejoin: round;
	filter: drop-shadow(0 0 2px rgba(37, 166, 255, 0.55));
	transition: opacity 0.18s ease;
	vector-effect: non-scaling-stroke;
}

.brem-principle__motion-arrow.is-active {
	opacity: 1;
	stroke-dasharray: 8 7;
	animation-duration: 1s;
}

.brem-principle__motion-arrow--down.is-active,
.brem-principle__motion-arrow--discharge.is-active {
	animation: brem-principle-flow-down 1s ease-in-out infinite;
}

.brem-principle__motion-arrow--up.is-active {
	animation: brem-principle-flow-up 1s ease-in-out infinite;
}

.brem-principle__motion-arrow--across.is-active {
	animation: brem-principle-flow-across 1s ease-in-out infinite;
}

.brem-principle__motion-arrow--rotate-left.is-active {
	animation: brem-principle-rotate-left 1.05s ease-in-out infinite;
}

.brem-principle__motion-arrow--rotate-right.is-active {
	animation: brem-principle-rotate-right 1.05s ease-in-out infinite;
}

.brem-principle__motion-arrow--grip-left,
.brem-principle__motion-arrow--grip-right {
	stroke-width: 2.6;
	stroke-dasharray: 5 6;
}

.brem-principle__motion-arrow--grip-left.is-active,
.brem-principle__motion-arrow--grip-right.is-active {
	animation: brem-principle-grip-pulse 1.2s ease-in-out infinite;
}

.brem-principle__motion-arrow--delay-1.is-active {
	animation-delay: 0.16s;
}

.brem-principle__motion-arrow--delay-2.is-active {
	animation-delay: 0.32s;
}

.brem-principle__motion-arrow--vibrate.is-active {
	animation: brem-principle-vibrate 0.7s ease-in-out infinite;
}

.brem-principle__motion-arrow--impact.is-active {
	animation: brem-principle-impact 0.55s ease-out infinite;
}

@keyframes brem-principle-leader-glow {
	0%, 100% { opacity: 0.72; filter: drop-shadow(0 0 2px rgba(37, 166, 255, 0.5)); }
	50% { opacity: 1; filter: drop-shadow(0 0 8px rgba(37, 166, 255, 0.95)); }
}

@keyframes brem-principle-target-pulse {
	0%, 100% { stroke-width: 2; opacity: 0.82; }
	50% { stroke-width: 3.2; opacity: 1; }
}

@keyframes brem-principle-flow-down {
	0% { transform: translateY(-8px); opacity: 0.35; }
	50% { transform: translateY(4px); opacity: 1; }
	100% { transform: translateY(12px); opacity: 0.35; }
}

@keyframes brem-principle-flow-up {
	0% { transform: translateY(8px); opacity: 0.35; }
	50% { transform: translateY(-4px); opacity: 1; }
	100% { transform: translateY(-12px); opacity: 0.35; }
}

@keyframes brem-principle-flow-across {
	0% { transform: translateX(-8px); opacity: 0.35; }
	50% { transform: translateX(4px); opacity: 1; }
	100% { transform: translateX(12px); opacity: 0.35; }
}

@keyframes brem-principle-rotate-left {
	0%, 100% { transform: rotate(-4deg); opacity: 0.45; }
	50% { transform: rotate(4deg); opacity: 1; }
}

@keyframes brem-principle-rotate-right {
	0%, 100% { transform: rotate(4deg); opacity: 0.45; }
	50% { transform: rotate(-4deg); opacity: 1; }
}

@keyframes brem-principle-grip-pulse {
	0%, 100% { opacity: 0.28; stroke-dashoffset: 12; filter: drop-shadow(0 0 1px rgba(37, 166, 255, 0.25)); }
	45% { opacity: 1; stroke-dashoffset: 0; filter: drop-shadow(0 0 5px rgba(37, 166, 255, 0.9)); }
	70% { opacity: 0.55; stroke-dashoffset: -8; }
}

@keyframes brem-principle-vibrate {
	0%, 100% { transform: translate(-3px, -4px); opacity: 0.55; }
	50% { transform: translate(3px, 4px); opacity: 1; }
}

@keyframes brem-principle-impact {
	0% { transform: scale(0.82); opacity: 0.35; }
	45% { transform: scale(1.08); opacity: 1; }
	100% { transform: scale(1); opacity: 0.55; }
}

@media (prefers-reduced-motion: reduce) {
	.brem-principle__leader-line.is-active,
	.brem-principle__leader-target.is-active,
	.brem-principle__motion-arrow.is-active {
		animation: none !important;
	}

	.brem-principle__motion-arrow.is-active {
		opacity: 1;
	}
}

@media (max-width: 1050px) {
	.brem-principle__header {
		grid-template-columns: 1fr;
		gap: 18px;
	}

	.brem-principle__panel {
		grid-template-columns: 1fr;
	}

	.brem-principle__visual {
		border-right: 0;
		border-bottom: 1px solid var(--brem-principle-line);
	}

	.brem-principle__steps {
		display: grid;
		grid-template-columns: 1fr 1fr;
	}

	.brem-principle__step:nth-child(odd) {
		border-right: 1px solid var(--brem-principle-line);
	}

	.brem-principle__step:nth-child(3) {
		border-bottom: 0;
	}
}

@media (max-width: 680px) {
	.brem-principle {
		padding: 52px 0 64px;
	}

	.brem-principle__intro {
		font-size: 16px;
	}

	.brem-principle__visual {
		padding: 8px;
	}

	.brem-principle__hotspot-rail {
		left: 8px;
		width: 46px;
	}

	.brem-principle__hotspot {
		width: 38px;
		height: 38px;
		border-width: 3px;
		font-size: 13px;
		box-shadow: 0 3px 10px rgba(16, 38, 63, 0.22);
	}

	.brem-principle__leader-line {
		stroke-width: 1.5;
	}

	.brem-principle__leader-target {
		stroke-width: 1.5;
	}

	.brem-principle__motion-arrow {
		stroke-width: 2.5;
	}

	.brem-principle__steps {
		grid-template-columns: 1fr;
	}

	.brem-principle__step {
		border-right: 0 !important;
		border-bottom: 1px solid var(--brem-principle-line) !important;
		padding: 22px 18px;
	}

	.brem-principle__step:last-child {
		border-bottom: 0 !important;
	}

	.brem-principle__features {
		grid-template-columns: 1fr;
	}

	.brem-principle__feature {
		border-right: 0;
		border-bottom: 1px solid var(--brem-principle-line);
	}

	.brem-principle__feature:last-child {
		border-bottom: 0;
	}
}