.esfv-wrap {
	--esfv-navy: #1F3864;
	--esfv-navy-deep: #14243F;
	--esfv-amber: #C9A21A;
	--esfv-amber-soft: #F2E9C6;
	--esfv-free: #2F7D5C;
	--esfv-free-bg: #EAF5EF;
	--esfv-elite-deep: #5C1A3D;
	--esfv-paper: #FBFAF6;
	--esfv-grid-line: rgba(31, 56, 100, 0.07);
	--esfv-ink: #24303F;
	--esfv-ink-soft: #5B6B7F;
	--esfv-sans: 'IBM Plex Sans', sans-serif;
	--esfv-mono: 'JetBrains Mono', monospace;

	font-family: var(--esfv-sans);
	color: var(--esfv-ink);
	max-width: 880px;
	margin: 0 auto;
}

/* ---------- Header ---------- */

.esfv-header {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 16px;
	flex-wrap: wrap;
	padding-bottom: 14px;
	border-bottom: 2px solid var(--esfv-navy);
}

.esfv-eyebrow {
	display: block;
	font-family: var(--esfv-mono);
	font-size: 0.7rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--esfv-amber);
	margin-bottom: 2px;
}

.esfv-title {
	margin: 0;
	color: var(--esfv-navy);
	font-size: 1.5rem;
	font-weight: 600;
	letter-spacing: -0.01em;
}

.esfv-access-badge {
	font-family: var(--esfv-mono);
	font-size: 0.72rem;
	font-weight: 600;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	padding: 6px 12px;
	border-radius: 3px;
	white-space: nowrap;
	border: 1px solid transparent;
}

.esfv-access-tier-1 {
	background: var(--esfv-free-bg);
	color: var(--esfv-free);
	border-color: var(--esfv-free);
}

.esfv-access-tier-2 {
	background: var(--esfv-amber-soft);
	color: var(--esfv-navy);
	border-color: var(--esfv-amber);
}

.esfv-access-tier-3 {
	background: var(--esfv-navy);
	color: var(--esfv-amber-soft);
	border-color: var(--esfv-amber);
}

.esfv-upsell-hint {
	margin: 10px 0 0;
	font-size: 0.85rem;
	color: var(--esfv-ink-soft);
}

.esfv-upsell-hint a {
	color: var(--esfv-navy);
	font-weight: 600;
	text-decoration: underline;
	text-decoration-color: var(--esfv-amber);
	text-underline-offset: 2px;
}

/* ---------- Search ---------- */

.esfv-search-bar {
	margin: 20px 0 18px;
	display: flex;
	align-items: center;
	gap: 10px;
	flex-wrap: wrap;
}

.esfv-search-input {
	flex: 1 1 auto;
	width: 100%;
	max-width: 420px;
	padding: 9px 14px;
	background: var(--esfv-paper);
	border: 1px solid rgba(31, 56, 100, 0.25);
	border-radius: 4px;
	font-family: var(--esfv-sans);
	font-size: 0.92rem;
	color: var(--esfv-ink);
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.esfv-toggle-all-btn {
	flex: 0 0 auto;
	background: #fff;
	color: var(--esfv-navy);
	border: 1px solid rgba(31, 56, 100, 0.25);
	white-space: nowrap;
}

.esfv-toggle-all-btn:hover {
	background: var(--esfv-paper);
	border-color: var(--esfv-navy);
}

.esfv-search-input::placeholder {
	color: var(--esfv-ink-soft);
}

.esfv-search-input:focus-visible {
	outline: none;
	border-color: var(--esfv-amber);
	box-shadow: 0 0 0 3px rgba(201, 162, 26, 0.18);
}

/* ---------- Blueprint frame ---------- */

.esfv-tree-frame {
	position: relative;
	background:
		repeating-linear-gradient(0deg, transparent 0 23px, var(--esfv-grid-line) 23px 24px),
		repeating-linear-gradient(90deg, transparent 0 23px, var(--esfv-grid-line) 23px 24px),
		var(--esfv-paper);
	border: 1px solid rgba(31, 56, 100, 0.18);
	border-radius: 6px;
	padding: 24px 22px;
}

.esfv-corner {
	position: absolute;
	width: 16px;
	height: 16px;
	pointer-events: none;
}

.esfv-corner-tl {
	top: -1px;
	left: -1px;
	border-top: 2px solid var(--esfv-amber);
	border-left: 2px solid var(--esfv-amber);
}

.esfv-corner-br {
	bottom: -1px;
	right: -1px;
	border-bottom: 2px solid var(--esfv-amber);
	border-right: 2px solid var(--esfv-amber);
}

/* ---------- Folder tree ---------- */

.esfv-topic {
	position: relative;
}

.esfv-depth-0 + .esfv-depth-0 {
	margin-top: 22px;
	padding-top: 18px;
	border-top: 1px dashed rgba(31, 56, 100, 0.15);
}

.esfv-topic-title {
	font-family: var(--esfv-mono);
	font-size: 0.78rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--esfv-navy);
	margin: 0 0 10px;
	padding-left: 12px;
	border-left: 3px solid var(--esfv-amber);
	display: flex;
	align-items: center;
	gap: 6px;
}

.esfv-subtopic-title {
	font-family: var(--esfv-mono);
	font-size: 0.7rem;
	font-weight: 600;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--esfv-ink-soft);
	margin: 14px 0 6px;
	padding-left: 10px;
	border-left: 2px solid rgba(31, 56, 100, 0.25);
	display: flex;
	align-items: center;
	gap: 6px;
}

/* ---------- Collapsible toggle ---------- */

.esfv-toggle {
	background: none;
	border: none;
	padding: 0;
	margin: 0;
	cursor: pointer;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 16px;
	height: 16px;
	flex-shrink: 0;
}

.esfv-toggle-arrow {
	display: inline-block;
	color: var(--esfv-amber);
	font-size: 0.7em;
	transition: transform 0.15s ease;
	transform: rotate(90deg);
}

.esfv-topic.esfv-collapsed > .esfv-topic-title .esfv-toggle-arrow,
.esfv-topic.esfv-collapsed > .esfv-subtopic-title .esfv-toggle-arrow {
	transform: rotate(0deg);
}

.esfv-topic.esfv-collapsed > .esfv-folder-body {
	display: none;
}

@media (prefers-reduced-motion: reduce) {
	.esfv-toggle-arrow {
		transition: none;
	}
}

.esfv-file-list {
	list-style: none;
	margin: 0;
	padding: 0;
}

/* ---------- File row: parts-list / spec-sheet line ---------- */

.esfv-file {
	display: flex;
	align-items: baseline;
	gap: 10px;
	padding: 6px 0;
	border-bottom: 1px solid rgba(31, 56, 100, 0.08);
}

.esfv-file-name {
	flex: 0 1 auto;
	color: var(--esfv-ink);
	font-family: var(--esfv-sans);
	font-size: 0.84rem;
	font-weight: 400;
	line-height: 1.4;
	letter-spacing: 0.005em;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.esfv-leader {
	flex: 1 1 auto;
	min-width: 12px;
	border-bottom: 1px dotted rgba(31, 56, 100, 0.3);
	height: 0;
	align-self: center;
	margin-bottom: 3px;
}

/* ---------- Tier tags ---------- */

.esfv-tag {
	flex: 0 0 auto;
	font-family: var(--esfv-mono);
	font-size: 0.66rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	padding: 3px 9px;
	border-radius: 3px;
	white-space: nowrap;
	text-decoration: none;
	border: 1px solid transparent;
}

.esfv-tag-tier-1 {
	background: var(--esfv-free-bg);
	color: var(--esfv-free);
	border-color: rgba(47, 125, 92, 0.4);
}

.esfv-tag-tier-2 {
	background: #fff;
	color: var(--esfv-navy);
	border-color: var(--esfv-amber);
}

.esfv-tag-tier-3 {
	background: var(--esfv-navy);
	color: var(--esfv-amber-soft);
	border-color: var(--esfv-navy);
}

/* Locked tags become clickable CTAs — a touch more presence than the plain informational tags above */

.esfv-tag-locked {
	cursor: pointer;
	transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.esfv-tag-lock {
	margin-right: 3px;
}

.esfv-tag-locked.esfv-tag-tier-2 {
	background: var(--esfv-amber-soft);
	border-color: var(--esfv-amber);
	color: var(--esfv-navy-deep);
}

.esfv-tag-locked.esfv-tag-tier-2:hover {
	background: var(--esfv-amber);
	color: #fff;
}

/* Elite lock: the one signature moment — a rotated ink-stamp treatment */

.esfv-tag-locked.esfv-tag-tier-3 {
	background: var(--esfv-navy-deep);
	color: var(--esfv-amber-soft);
	border: 1.5px solid var(--esfv-amber);
	box-shadow: 0 0 0 2px var(--esfv-navy-deep), 0 0 0 3px rgba(201, 162, 26, 0.35);
	transform: rotate(-2deg);
	padding: 4px 11px;
}

.esfv-tag-locked.esfv-tag-tier-3:hover {
	transform: rotate(-2deg) scale(1.04);
	background: var(--esfv-elite-deep);
}

@media (prefers-reduced-motion: reduce) {
	.esfv-tag-locked {
		transition: none;
	}
	.esfv-tag-locked.esfv-tag-tier-3:hover {
		transform: rotate(-2deg);
	}
}

.esfv-tag-locked:focus-visible {
	outline: 2px solid var(--esfv-amber);
	outline-offset: 2px;
}

/* ---------- Action buttons ---------- */

.esfv-btn {
	flex: 0 0 auto;
	font-family: var(--esfv-mono);
	font-size: 0.72rem;
	font-weight: 600;
	letter-spacing: 0.03em;
	border: none;
	border-radius: 3px;
	padding: 5px 12px;
	cursor: pointer;
	transition: background 0.12s ease;
}

.esfv-btn.esfv-download {
	background: var(--esfv-navy);
	color: #fff;
}

.esfv-btn.esfv-download:hover {
	background: var(--esfv-navy-deep);
}

.esfv-btn.esfv-preview {
	background: transparent;
	color: var(--esfv-navy);
	border: 1px solid var(--esfv-navy);
}

.esfv-download-form {
	display: inline-flex;
	margin: 0;
}

.esfv-btn:focus-visible {
	outline: 2px solid var(--esfv-amber);
	outline-offset: 2px;
}

.esfv-loading,
.esfv-empty {
	color: var(--esfv-ink-soft);
	font-style: italic;
	font-size: 0.9rem;
}

/* ---------- Upgrade / login modal ---------- */

.esfv-modal-overlay {
	position: fixed;
	inset: 0;
	background: rgba(20, 36, 63, 0.6);
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 9999;
	padding: 16px;
}

.esfv-modal {
	background: #fff;
	border-radius: 8px;
	max-width: 380px;
	width: 100%;
	padding: 26px;
	box-shadow: 0 12px 40px rgba(20, 36, 63, 0.3);
	font-family: 'IBM Plex Sans', sans-serif;
}

.esfv-modal-title {
	color: #1F3864;
	margin: 0 0 10px;
	font-size: 1.1rem;
	border-bottom: 2px solid #C9A21A;
	padding-bottom: 10px;
}

.esfv-modal-body {
	color: #333;
	margin: 0 0 22px;
	line-height: 1.55;
	font-size: 0.92rem;
}

.esfv-modal-actions {
	display: flex;
	justify-content: flex-end;
	gap: 10px;
}

.esfv-modal-actions .esfv-modal-close {
	background: #eee;
	color: #333;
	border: none;
	border-radius: 3px;
	padding: 6px 13px;
	font-family: 'JetBrains Mono', monospace;
	font-size: 0.72rem;
	cursor: pointer;
}

.esfv-modal-actions .esfv-modal-upgrade {
	background: #1F3864;
	color: #fff;
	text-decoration: none;
	display: inline-block;
	font-family: 'JetBrains Mono', monospace;
	font-size: 0.72rem;
	font-weight: 600;
	border-radius: 3px;
	padding: 6px 13px;
}

/* ---------- Responsive ---------- */

@media (max-width: 520px) {
	.esfv-tree-frame {
		padding: 18px 14px;
	}
	.esfv-file {
		flex-wrap: wrap;
	}
	.esfv-file-name {
		white-space: normal;
		flex: 1 1 100%;
	}
	.esfv-leader {
		display: none;
	}
	.esfv-header {
		align-items: flex-start;
	}
}