/* =====================================================================
   ECS -- Biochar ROI Calculator (three modes) styling.

   Layered on top of epr-calculator.css: it reuses the .ecs-calculator
   hero / step / metric / result / breakdown / footer-note design system
   and only adds the ROI-specific pieces -- the mode tablist, the input
   field grid, the illustrative banner, and the plain-language formula
   boxes. Token fallbacks match the EPR sheet so the calculator renders
   correctly even if a token is absent. ASCII-only. WCAG 2.2 AA.
   ===================================================================== */

.ecs-roi .roi-intro {
	max-width: 72ch;
	color: var(--color-fg-muted, #6A7570);
	font-size: var(--fs-16, 1rem);
	line-height: 1.6;
	margin: 0 0 24px;
}

/* ---- mode tablist ---- */
.ecs-roi .roi-tabs {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin: 0 0 24px;
	border: 0;
	padding: 0;
}

.ecs-roi .roi-tab {
	appearance: none;
	cursor: pointer;
	font-family: var(--font-sans);
	font-size: 15px;
	font-weight: 700;
	line-height: 1.2;
	padding: 13px 20px;
	border-radius: var(--radius-pill, 999px);
	border: 1.5px solid var(--epr-border, #D6DBD7);
	background: var(--epr-cream-50, #FFFBF1);
	color: var(--epr-forest-900, #0B4E3D);
	transition: border-color 140ms ease, background-color 140ms ease, box-shadow 220ms ease, transform 140ms ease;
}

.ecs-roi .roi-tab:hover {
	border-color: var(--epr-leaf-400, #A3CB6B);
	background: var(--epr-leaf-100, #EBF3D9);
	transform: translateY(-1px);
}

.ecs-roi .roi-tab[aria-selected="true"] {
	background: var(--epr-forest-900, #0B4E3D);
	border-color: var(--epr-forest-900, #0B4E3D);
	color: var(--epr-cream-100, #FEF5E7);
	box-shadow: 0 10px 24px -12px rgba(11, 78, 61, 0.55);
}

.ecs-roi .roi-tab:focus-visible {
	outline: none;
	box-shadow: var(--focus-ring, 0 0 0 3px rgba(134, 182, 71, 0.55));
}

.ecs-roi .roi-tab .roi-tab-sub {
	display: block;
	font-weight: 500;
	font-size: 12px;
	margin-top: 3px;
	opacity: 0.8;
}

/* ---- panels ---- */
.ecs-roi .roi-panel[hidden] {
	display: none;
}

/* ---- illustrative / pre-launch banner (Mode C) ---- */
.ecs-roi .roi-banner {
	display: flex;
	gap: 12px;
	align-items: flex-start;
	padding: 14px 18px;
	margin: 0 0 20px;
	border-radius: var(--radius-md, 8px);
	background: var(--epr-cream-100, #FEF5E7);
	border: 1px solid var(--epr-border, #D6DBD7);
	border-left: 4px solid var(--color-warning, #C4892F);
	color: var(--epr-ink-900, #14201B);
	font-size: 14px;
	line-height: 1.55;
}

.ecs-roi .roi-banner strong {
	color: var(--epr-forest-900, #0B4E3D);
}

/* ---- input field grid ---- */
.ecs-roi .roi-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
	gap: 16px;
	margin-top: 18px;
}

.ecs-roi .roi-field {
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.ecs-roi .roi-field label {
	font-size: 14px;
	font-weight: 600;
	color: var(--color-fg, #14201B);
	line-height: 1.35;
}

.ecs-roi .roi-input-wrap {
	position: relative;
	display: flex;
	align-items: center;
}

.ecs-roi .roi-field input[type="number"] {
	width: 100%;
	padding: 12px 14px;
	border: 1.5px solid var(--epr-border, #D6DBD7);
	border-radius: var(--radius-sm, 6px);
	font-family: var(--font-mono);
	font-size: 15px;
	background: var(--epr-surface, #FFFFFF);
	color: var(--color-fg, #14201B);
	transition: border-color 140ms ease, box-shadow 140ms ease;
}

.ecs-roi .roi-field input[type="number"]:hover {
	border-color: var(--epr-leaf-400, #A3CB6B);
}

.ecs-roi .roi-field input[type="number"]:focus {
	outline: none;
	border-color: var(--epr-leaf-500, #86B647);
	box-shadow: 0 0 0 3px rgba(134, 182, 71, 0.3);
}

.ecs-roi .roi-field .roi-unit {
	font-family: var(--font-mono);
	font-size: 12px;
	color: var(--color-fg-muted, #6A7570);
}

.ecs-roi .roi-field .roi-hint {
	font-size: 11px;
	color: var(--color-fg-muted, #6A7570);
	line-height: 1.4;
}

.ecs-roi .roi-field .roi-sample {
	font-weight: 700;
	color: var(--epr-leaf-700, #6A9436);
}

/* ---- formula / assumptions box ---- */
.ecs-roi .roi-formula {
	margin-top: 22px;
	padding: 18px 20px;
	background: var(--epr-cream-50, #FFFBF1);
	border: 1px solid var(--epr-border, #D6DBD7);
	border-radius: var(--radius-md, 8px);
	font-size: 13px;
	line-height: 1.6;
	color: var(--color-fg-muted, #6A7570);
}

.ecs-roi .roi-formula h3 {
	margin: 0 0 8px;
	font-size: 13px;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--epr-forest-900, #0B4E3D);
}

.ecs-roi .roi-formula code {
	font-family: var(--font-mono);
	font-size: 12.5px;
	color: var(--epr-forest-900, #0B4E3D);
	background: var(--epr-leaf-100, #EBF3D9);
	padding: 1px 5px;
	border-radius: 4px;
}

.ecs-roi .roi-formula ul {
	margin: 8px 0 0;
	padding-left: 20px;
}

.ecs-roi .roi-formula li {
	margin: 4px 0;
}

/* The reused .result panel is shown live (no hidden->visible toggle here). */
.ecs-roi .result.live {
	display: block;
}

.ecs-roi .result h2 {
	font-size: clamp(1.3rem, 1rem + 1vw, 1.6rem);
}

/* ---- lead-capture host ---- */
.ecs-roi .roi-lead {
	margin-top: 40px;
}

.ecs-roi .roi-lead .roi-lead-head {
	max-width: 62ch;
}

/* ---- dark theme (mirror epr-calculator.css) ---- */
html[data-theme="dark"] .ecs-roi .roi-tab {
	background: rgba(246, 244, 236, 0.04);
	border-color: var(--color-border, rgba(246, 244, 236, 0.16));
	color: var(--color-fg, #F6F4EC);
}

html[data-theme="dark"] .ecs-roi .roi-tab[aria-selected="true"] {
	background: var(--epr-leaf-500, #86B647);
	border-color: var(--epr-leaf-500, #86B647);
	color: var(--epr-ink-900, #14201B);
}

html[data-theme="dark"] .ecs-roi .roi-banner {
	background: rgba(246, 244, 236, 0.04);
	border-color: var(--color-border, rgba(246, 244, 236, 0.16));
	border-left-color: var(--color-warning, #C4892F);
	color: var(--color-fg, #F6F4EC);
}

html[data-theme="dark"] .ecs-roi .roi-field label {
	color: var(--color-fg, #F6F4EC);
}

html[data-theme="dark"] .ecs-roi .roi-field input[type="number"] {
	background: rgba(10, 18, 14, 0.55);
	color: var(--color-fg, #F6F4EC);
	border-color: var(--color-border, rgba(246, 244, 236, 0.16));
}

html[data-theme="dark"] .ecs-roi .roi-formula {
	background: rgba(246, 244, 236, 0.04);
	border-color: var(--color-border, rgba(246, 244, 236, 0.16));
	color: var(--color-fg-muted, rgba(246, 244, 236, 0.62));
}

html[data-theme="dark"] .ecs-roi .roi-formula h3,
html[data-theme="dark"] .ecs-roi .roi-formula code {
	color: var(--epr-leaf-400, #A3CB6B);
}

@media (max-width: 720px) {
	.ecs-roi .roi-grid {
		grid-template-columns: 1fr;
	}
	.ecs-roi .roi-tab {
		flex: 1 1 100%;
	}
}