/* Phase 3 — case studies, solutions bridge, contact form */

.rf-case-cover {
	overflow: hidden;
	border-radius: var(--rf-radius-card);
	border: 1px solid var(--rf-border);
	background: var(--rf-navy-800);
}

.rf-case-cover img {
	display: block;
	width: 100%;
	height: auto;
	aspect-ratio: 3 / 2;
	object-fit: cover;
	object-position: center;
}

.rf-flow {
	margin: 0;
	padding: 1.25rem;
	border-radius: var(--rf-radius-card);
	background: var(--rf-navy-900);
	border: 1px solid rgba(143, 154, 168, 0.28);
}

.rf-flow__chain {
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rf-flow__node {
	position: relative;
	flex: 1 1 8rem;
	min-width: 7.5rem;
	padding: 0.85rem 0.75rem;
	border-radius: 8px;
	background: var(--rf-navy-800);
	border: 1px solid rgba(143, 154, 168, 0.35);
	text-align: center;
}

.rf-flow__node:not(:last-child)::after {
	content: "→";
	position: absolute;
	right: -0.85rem;
	top: 50%;
	transform: translateY(-50%);
	color: var(--rf-accent);
	font-weight: 700;
}

.rf-flow__node--accent {
	border-color: var(--rf-signal);
}

.rf-flow__title {
	display: block;
	font-family: var(--rf-font-heading);
	font-size: 0.9rem;
	font-weight: 600;
	color: var(--rf-white);
	line-height: 1.35;
}

.rf-flow__note {
	margin: 1rem 0 0;
	font-family: var(--rf-font-mono);
	font-size: 0.75rem;
	color: #b7c0cb;
}

.rf-tech-tags--lg {
	gap: 0.55rem;
}

.rf-tech-tags--lg li {
	font-size: 0.82rem;
	padding: 0.35rem 0.65rem;
}

.rf-related-links {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem 1.25rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rf-related-links a {
	font-weight: 600;
	color: var(--rf-accent);
	text-decoration: none;
}

.rf-related-links a:hover,
.rf-related-links a:focus-visible {
	color: var(--rf-accent-hover);
}

.rf-solution-item__caps {
	margin-top: 0.85rem !important;
	font-family: var(--rf-font-mono);
	font-size: 0.72rem !important;
	color: var(--rf-metal) !important;
	line-height: 1.45 !important;
}

.rf-bridge__formula {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.55rem 0.65rem;
	margin: 0 0 1.75rem;
	font-family: var(--rf-font-heading);
	font-weight: 600;
	color: var(--rf-white);
}

.rf-bridge__formula > span:not(.rf-bridge__plus):not(.rf-bridge__eq):not(.rf-bridge__result) {
	padding: 0.45rem 0.7rem;
	border-radius: 6px;
	background: var(--rf-navy-800);
	border: 1px solid rgba(143, 154, 168, 0.35);
}

.rf-bridge__plus,
.rf-bridge__eq {
	color: var(--rf-accent);
}

.rf-bridge__result {
	padding: 0.45rem 0.7rem;
	border-radius: 6px;
	border: 1px solid var(--rf-signal);
	color: var(--rf-white);
}

.rf-contact-layout {
	display: grid;
	grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
	gap: 2.5rem;
	align-items: start;
}

.rf-contact-aside__block + .rf-contact-aside__block {
	margin-top: 1.75rem;
}

.rf-contact-aside__heading {
	margin: 0 0 0.75rem;
	font-size: 1.05rem;
}

.rf-contact-aside__list {
	margin: 0;
	padding-left: 1.1rem;
	color: var(--rf-text-muted);
	line-height: 1.6;
}

.rf-contact-aside__email a {
	font-weight: 600;
	color: var(--rf-accent);
	text-decoration: none;
}

.rf-contact-privacy {
	margin-top: 1.75rem;
	font-size: 0.9rem;
	color: var(--rf-text-muted);
	line-height: 1.55;
}

.rf-contact-privacy a {
	color: var(--rf-accent);
}

.rf-form {
	position: relative;
}

.rf-form__grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 1rem 1.25rem;
}

.rf-form__field {
	margin: 0 0 1rem;
}

.rf-form__field--full {
	grid-column: 1 / -1;
}

.rf-form__field label {
	display: block;
	margin-bottom: 0.4rem;
	font-weight: 600;
	font-size: 0.95rem;
}

.rf-req {
	color: var(--rf-accent);
}

.rf-form__field input,
.rf-form__field select,
.rf-form__field textarea {
	width: 100%;
	padding: 0.7rem 0.8rem;
	border: 1px solid var(--rf-border);
	border-radius: var(--rf-radius-btn);
	background: var(--rf-white);
	color: var(--rf-text-dark);
	font: inherit;
}

.rf-form__field input:focus-visible,
.rf-form__field select:focus-visible,
.rf-form__field textarea:focus-visible {
	outline: 2px solid var(--rf-accent);
	outline-offset: 2px;
}

.rf-form__hp {
	position: absolute;
	left: -10000px;
	top: auto;
	width: 1px;
	height: 1px;
	overflow: hidden;
}

.rf-form__actions {
	margin: 0.5rem 0 0;
}

.rf-form-status:focus {
	outline: 2px solid var(--rf-accent);
	outline-offset: 2px;
}

.rf-form-status--success {
	border-color: var(--rf-signal);
	background: rgba(26, 155, 148, 0.08);
}

.rf-form-status--error {
	border-color: #c45c5c;
	background: rgba(196, 92, 92, 0.08);
}

.rf-form-status ul {
	margin: 0.5rem 0 0;
	padding-left: 1.1rem;
}

@media (max-width: 900px) {
	.rf-flow__node:not(:last-child)::after {
		content: "↓";
		right: auto;
		left: 50%;
		top: auto;
		bottom: -1.05rem;
		transform: translateX(-50%);
	}

	.rf-flow__chain {
		flex-direction: column;
	}

	.rf-flow__node {
		flex: 1 1 auto;
		min-width: 0;
	}

	.rf-contact-layout,
	.rf-form__grid {
		grid-template-columns: 1fr;
	}
}

/* Unpublished case-study skeleton structure */
.rf-case-block {
	max-width: 48rem;
}

.rf-case-media {
	margin: 0;
	overflow: hidden;
	border-radius: var(--rf-radius-card);
	border: 1px solid var(--rf-border);
	background: var(--rf-navy-800);
}

.rf-case-media img {
	display: block;
	width: 100%;
	height: auto;
	aspect-ratio: 3 / 2;
	object-fit: cover;
}

.rf-case-media--cover {
	max-width: none;
}

.rf-case-media--diagram {
	padding: 1.25rem;
	background: var(--rf-navy-900);
	border-color: rgba(143, 154, 168, 0.28);
	min-height: 10rem;
}

.rf-case-media-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 1rem;
	margin-top: 1.25rem;
}

.rf-case-callout {
	margin: 1.25rem 0 0;
	padding: 0.85rem 1rem;
	border-left: 3px solid var(--rf-accent);
	background: var(--rf-surface);
	font-family: var(--rf-font-mono);
	font-size: 0.85rem;
	line-height: 1.5;
	color: var(--rf-text-muted);
}

@media (max-width: 768px) {
	.rf-case-media-grid {
		grid-template-columns: 1fr;
	}
}

/* Premium Upgrade Phase 2 — solution and contact refinements */
.rf-solution-detail {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.82fr);
	gap: 2.5rem;
	align-items: center;
}

.rf-solution-detail--reverse {
	grid-template-columns: minmax(18rem, 0.82fr) minmax(0, 1fr);
}

.rf-solution-detail--reverse .rf-solution-detail__visual {
	order: -1;
}

.rf-solution-detail__visual {
	padding: 1rem;
	border: 1px solid rgba(143, 154, 168, 0.24);
	border-radius: var(--rf-radius-card);
	background:
		linear-gradient(rgba(143, 154, 168, 0.08) 1px, transparent 1px),
		linear-gradient(90deg, rgba(143, 154, 168, 0.08) 1px, transparent 1px),
		var(--rf-white);
	background-size: 24px 24px;
	box-shadow: var(--rf-shadow-sm);
}

.rf-section--surface .rf-solution-detail__visual {
	background:
		linear-gradient(rgba(143, 154, 168, 0.08) 1px, transparent 1px),
		linear-gradient(90deg, rgba(143, 154, 168, 0.08) 1px, transparent 1px),
		rgba(255, 255, 255, 0.82);
	background-size: 24px 24px;
}

.rf-system-flow {
	display: grid;
	gap: 0.55rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rf-system-flow li {
	position: relative;
	padding: 0.72rem 0.85rem;
	border: 1px solid rgba(143, 154, 168, 0.32);
	border-radius: 6px;
	background: rgba(255, 255, 255, 0.92);
	font-family: var(--rf-font-mono);
	font-size: 0.78rem;
	color: var(--rf-text-dark);
}

.rf-system-flow li:not(:last-child)::after {
	content: "↓";
	position: absolute;
	left: 1rem;
	bottom: -0.72rem;
	color: var(--rf-accent);
	font-weight: 700;
}

.rf-parameter-strip {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0.5rem;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rf-parameter-strip li {
	padding: 0.65rem 0.45rem;
	border: 1px solid rgba(26, 155, 148, 0.28);
	border-radius: 6px;
	background: rgba(26, 155, 148, 0.07);
	font-family: var(--rf-font-mono);
	font-size: 0.76rem;
	text-align: center;
	color: var(--rf-navy-800);
}

.rf-contact-layout {
	grid-template-columns: minmax(0, 1.35fr) minmax(19rem, 0.85fr);
	gap: 2rem;
}

.rf-contact-layout > div,
.rf-contact-aside {
	padding: 1.35rem;
	border: 1px solid rgba(143, 154, 168, 0.24);
	border-radius: var(--rf-radius-card);
	background: var(--rf-white);
	box-shadow: var(--rf-shadow-sm);
}

.rf-contact-aside {
	position: sticky;
	top: calc(var(--rf-header-h) + 1.25rem);
	background:
		linear-gradient(180deg, rgba(47, 111, 237, 0.055), transparent),
		var(--rf-white);
}

.rf-contact-aside__block {
	padding-bottom: 1.25rem;
	border-bottom: 1px solid rgba(143, 154, 168, 0.18);
}

.rf-contact-aside__block + .rf-contact-aside__block {
	padding-top: 1.25rem;
}

.rf-contact-aside__heading {
	font-family: var(--rf-font-heading);
}

.rf-contact-aside__list {
	padding-left: 0;
	list-style: none;
}

.rf-contact-aside__list li {
	position: relative;
	padding-left: 1rem;
}

.rf-contact-aside__list li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.72rem;
	width: 0.35rem;
	height: 1px;
	background: var(--rf-accent);
}

.rf-form__field label {
	font-family: var(--rf-font-mono);
	font-size: 0.78rem;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	color: var(--rf-text-muted);
}

.rf-form__field input,
.rf-form__field select,
.rf-form__field textarea {
	min-height: 2.9rem;
	border-color: rgba(143, 154, 168, 0.34);
	background:
		linear-gradient(180deg, rgba(245, 247, 248, 0.72), rgba(255, 255, 255, 0.98));
	transition:
		border-color var(--rf-transition-fast),
		box-shadow var(--rf-transition-fast),
		background-color var(--rf-transition-fast);
}

.rf-form__field textarea {
	min-height: 12rem;
}

.rf-form__field select {
	appearance: none;
	background-image:
		linear-gradient(45deg, transparent 50%, var(--rf-accent) 50%),
		linear-gradient(135deg, var(--rf-accent) 50%, transparent 50%),
		linear-gradient(180deg, rgba(245, 247, 248, 0.72), rgba(255, 255, 255, 0.98));
	background-position:
		calc(100% - 18px) 50%,
		calc(100% - 13px) 50%,
		0 0;
	background-size: 5px 5px, 5px 5px, auto;
	background-repeat: no-repeat;
	padding-right: 2.25rem;
}

.rf-form__field input:focus-visible,
.rf-form__field select:focus-visible,
.rf-form__field textarea:focus-visible {
	border-color: var(--rf-accent);
	box-shadow: 0 0 0 4px rgba(47, 111, 237, 0.12);
}

.rf-form-status {
	margin-bottom: 1rem;
	padding: 0.9rem 1rem;
	border: 1px solid;
	border-radius: var(--rf-radius-card);
}

@media (max-width: 900px) {
	.rf-solution-detail,
	.rf-solution-detail--reverse,
	.rf-contact-layout {
		grid-template-columns: 1fr;
	}

	.rf-solution-detail--reverse .rf-solution-detail__visual {
		order: 0;
	}

	.rf-contact-aside {
		position: static;
	}
}

@media (max-width: 430px) {
	.rf-contact-layout > div,
	.rf-contact-aside {
		padding: 1rem;
	}

	.rf-parameter-strip {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

/* Premium Upgrade Phase 3 — authenticity and evidence readiness.
   These classes prepare future proof assets. They do not create fake UI,
   fake screenshots, fake badges, or new visual effects. */

[hidden].rf-evidence-badges,
[hidden].rf-verified-proof,
[hidden].rf-proof-logo-wall,
[hidden].rf-proof-certifications {
	display: none !important;
}

.rf-evidence-screenshot,
.rf-evidence-photo {
	position: relative;
	overflow: hidden;
	margin: 0;
	border: 1px solid var(--rf-border-subtle);
	border-radius: 18px;
	background: var(--rf-white);
	box-shadow: var(--rf-shadow-sm);
}

.rf-evidence-screenshot--framed {
	padding: 12px;
	background: linear-gradient(180deg, #ffffff 0%, #f6f8fb 100%);
}

.rf-evidence-screenshot img,
.rf-evidence-photo img {
	display: block;
	width: 100%;
	height: auto;
}

.rf-evidence-screenshot figcaption,
.rf-evidence-photo figcaption,
.rf-architecture-standard figcaption {
	margin-top: 10px;
	color: var(--rf-muted);
	font-size: 0.92rem;
	line-height: 1.5;
}

.rf-evidence-screenshot__note,
.rf-evidence-photo__note {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	margin-top: 10px;
	color: var(--rf-muted);
	font-size: 0.78rem;
	font-family: var(--rf-font-mono);
	text-transform: uppercase;
	letter-spacing: 0.08em;
}

.rf-redaction {
	position: absolute;
	border-radius: 7px;
	background: rgba(7, 17, 31, 0.78);
	backdrop-filter: blur(8px);
}

.rf-photo-annotations {
	position: absolute;
	inset: 0;
	pointer-events: none;
}

.rf-photo-annotation {
	position: absolute;
	max-width: 150px;
	padding: 6px 9px;
	border: 1px solid rgba(255, 255, 255, 0.44);
	border-radius: 999px;
	background: rgba(7, 17, 31, 0.78);
	color: var(--rf-white);
	font-size: 0.76rem;
	font-family: var(--rf-font-mono);
	line-height: 1.2;
	box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

.rf-photo-annotation::before {
	content: "";
	position: absolute;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--rf-accent);
	box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.18);
}

.rf-photo-annotation[data-pin="left"]::before {
	left: -14px;
	top: 50%;
	transform: translateY(-50%);
}

.rf-photo-annotation[data-pin="right"]::before {
	right: -14px;
	top: 50%;
	transform: translateY(-50%);
}

.rf-architecture-standard {
	margin: 0;
	padding: clamp(22px, 4vw, 34px);
	border: 1px solid var(--rf-border-subtle);
	border-radius: 22px;
	background: var(--rf-surface-raised);
	box-shadow: var(--rf-shadow-sm);
}

.rf-architecture-standard__chain {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 14px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rf-architecture-standard__node {
	position: relative;
	min-height: 88px;
	display: grid;
	align-content: center;
	gap: 8px;
	padding: 16px;
	border: 1px solid var(--rf-border-subtle);
	border-radius: 16px;
	background: var(--rf-white);
	color: var(--rf-ink);
	font-weight: 700;
}

.rf-architecture-standard__node:not(:last-child)::after {
	content: "→";
	position: absolute;
	right: -15px;
	top: 50%;
	z-index: 1;
	transform: translateY(-50%);
	color: var(--rf-accent);
	font-family: var(--rf-font-mono);
}

.rf-architecture-standard__node--physical {
	border-color: rgba(105, 122, 138, 0.24);
}

.rf-architecture-standard__node--connectivity {
	border-color: rgba(47, 111, 237, 0.28);
	background: rgba(47, 111, 237, 0.05);
}

.rf-architecture-standard__node--edge {
	border-color: rgba(231, 111, 81, 0.36);
	background: rgba(231, 111, 81, 0.06);
}

.rf-architecture-standard__node--platform {
	border-color: rgba(7, 17, 31, 0.28);
	background: var(--rf-navy-900);
	color: var(--rf-white);
}

.rf-architecture-standard__node--analytics {
	border-color: rgba(42, 157, 143, 0.34);
	background: rgba(42, 157, 143, 0.07);
}

.rf-tech-label {
	display: inline-flex;
	width: fit-content;
	padding: 4px 8px;
	border-radius: 999px;
	background: rgba(7, 17, 31, 0.06);
	color: var(--rf-muted);
	font-family: var(--rf-font-mono);
	font-size: 0.7rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
}

.rf-evidence-badges {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin: 0 0 12px;
	padding: 0;
	list-style: none;
}

.rf-evidence-badges li {
	padding: 5px 9px;
	border: 1px solid rgba(47, 111, 237, 0.22);
	border-radius: 999px;
	background: rgba(47, 111, 237, 0.07);
	color: var(--rf-accent);
	font-family: var(--rf-font-mono);
	font-size: 0.72rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.08em;
}

.rf-proof-logo-wall,
.rf-proof-certifications {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 16px;
	align-items: center;
}

.rf-proof-logo {
	display: grid;
	place-items: center;
	min-height: 76px;
	padding: 18px;
	border: 1px solid var(--rf-border-subtle);
	border-radius: 14px;
	background: var(--rf-white);
	filter: grayscale(1);
	opacity: 0.74;
}

.rf-confidentiality-note {
	margin-top: 18px;
	padding: 14px 16px;
	border-left: 3px solid var(--rf-accent);
	border-radius: 12px;
	background: rgba(47, 111, 237, 0.06);
	color: var(--rf-muted);
}

@media (max-width: 760px) {
	.rf-architecture-standard__chain {
		grid-template-columns: 1fr;
	}

	.rf-architecture-standard__node:not(:last-child)::after {
		right: auto;
		left: 18px;
		top: auto;
		bottom: -20px;
		transform: rotate(90deg);
	}

	.rf-photo-annotation {
		max-width: 128px;
		font-size: 0.7rem;
	}
}