/* ==========================================================================
   Learn·Index homepage — "Score First" layout
   Tokens only (see main.css :root), so dark mode follows the site toggle.
   Moss = growth (score, subject status). Slate = product (Learning Tools).
   No gradients. Every status carries a word, not just a colour.
   ========================================================================== */

:root {
	--sf-band-ink: var(--ink);
	--sf-band-soft: var(--ink-soft);
	--sf-t1: #D5E4D2;
	--sf-t2: #A5C6AB;
	--sf-t3: #5E9469;
	--sf-t4: #3C6E47;
	--sf-track: #ECEAE2;
	--sf-panel: #F3F2EC;
}

@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) {
		--sf-t1: #2C3D2F;
		--sf-t2: #3F5E45;
		--sf-t3: #5F9A6B;
		--sf-t4: #7FBF8C;
		--sf-track: #332D22;
		--sf-panel: #1D1A14;
	}
}

:root[data-theme="dark"] {
	--sf-t1: #2C3D2F;
	--sf-t2: #3F5E45;
	--sf-t3: #5F9A6B;
	--sf-t4: #7FBF8C;
	--sf-track: #332D22;
	--sf-panel: #1D1A14;
}

.sf-home {
	background: var(--paper);
	color: var(--ink);
}

.sf-home h1,
.sf-home h2,
.sf-home h3 {
	font-family: var(--font-display);
	color: var(--ink);
}

.sf-home .mono {
	font-family: var(--font-mono);
}

.sf-home li {
	max-width: none;
}

.sf-muted {
	color: var(--ink-soft);
	font-size: .9rem;
}

.sf-label {
	font-size: .72rem;
	font-weight: 600;
	letter-spacing: .16em;
	text-transform: uppercase;
	color: var(--ink-soft);
}

.sf-band .sf-eyebrow {
	color: var(--green-strong);
}

.sf-eyebrow {
	margin: 0;
	font-size: .75rem;
	font-weight: 600;
	letter-spacing: .2em;
	text-transform: uppercase;
	color: var(--sf-band-soft);
}

.sf-eyebrow-dark {
	color: var(--ink-soft);
}

/* ---------- buttons ---------- */
.sf-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 48px;
	padding: 0 24px;
	border-radius: 999px;
	border: 1.5px solid transparent;
	font-family: var(--font-body);
	font-weight: 700;
	font-size: 1rem;
	text-decoration: none;
	cursor: pointer;
	white-space: nowrap;
}

.sf-btn-primary {
	background: #3C6E47;
	color: #FFFFFF;
}

.sf-btn-primary:hover,
.sf-btn-primary:focus-visible {
	background: #2A4F33;
	color: #FFFFFF;
}

.sf-btn-quiet {
	background: transparent;
	color: var(--green-strong);
	border-color: var(--line-strong);
}

.sf-btn-quiet:hover,
.sf-btn-quiet:focus-visible {
	background: var(--green-soft);
	color: var(--green-strong);
}

.sf-btn-slate {
	background: var(--blue);
	color: #FFFFFF;
}

.sf-btn-slate:hover,
.sf-btn-slate:focus-visible {
	background: var(--blue-strong);
	color: #FFFFFF;
}

:root[data-theme="dark"] .sf-btn-slate,
:root[data-theme="dark"] .sf-btn-slate:hover {
	color: #17140F;
}

@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) .sf-btn-slate,
	:root:not([data-theme="light"]) .sf-btn-slate:hover {
		color: #17140F;
	}
}

/* ---------- hero band ---------- */
/* Soft brand wash: moss, slate and rust glows on a light paper base.
   Shared by the hero and the closing banner. Built from tokens, so it
   dims automatically in dark mode. */
.sf-wash {
	background:
		radial-gradient(620px circle at 8% 18%, color-mix(in srgb, var(--green) 26%, transparent), transparent 68%),
		radial-gradient(580px circle at 55% 0%, color-mix(in srgb, var(--blue) 22%, transparent), transparent 70%),
		radial-gradient(520px circle at 96% 38%, color-mix(in srgb, var(--rust) 20%, transparent), transparent 72%),
		linear-gradient(180deg, color-mix(in srgb, var(--paper) 78%, #fff 22%), color-mix(in srgb, var(--paper) 72%, var(--line) 28%));
}

.sf-band {
	color: var(--sf-band-ink);
	border-bottom: 1px solid var(--line);
}

.sf-hero {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 420px;
	gap: 56px;
	align-items: center;
	padding-top: 64px;
	padding-bottom: 120px;
}

.sf-hero-copy {
	display: flex;
	flex-direction: column;
	gap: 20px;
	min-width: 0;
}

.sf-home .sf-hero h1 {
	margin: 0;
	font-size: clamp(2.2rem, 5vw, 4rem);
	line-height: 1.06;
	font-weight: 800;
	letter-spacing: -.02em;
	color: var(--sf-band-ink);
}

.sf-dek {
	margin: 0;
	max-width: 36em;
	font-size: clamp(1.05rem, 1.6vw, 1.25rem);
	line-height: 1.55;
	color: var(--sf-band-soft);
}

.sf-form {
	margin-top: 6px;
	max-width: 640px;
	display: flex;
	align-items: flex-end;
	gap: 12px;
	padding: 18px;
	border-radius: 20px;
	background: var(--card);
	color: var(--ink);
	border: 1px solid var(--line);
	box-shadow: var(--shadow);
}

.sf-field {
	display: flex;
	flex-direction: column;
	gap: 6px;
	font-size: .88rem;
	font-weight: 600;
	color: var(--ink);
}

.sf-field-name {
	flex: 1 1 auto;
	min-width: 0;
}

.sf-field-grade {
	flex: 0 0 150px;
}

.sf-field input,
.sf-field select {
	height: 48px;
	width: 100%;
	box-sizing: border-box;
	border: 1.5px solid var(--line-strong);
	border-radius: 14px;
	padding: 0 14px;
	font: 400 1rem/1 var(--font-body);
	background: var(--card);
	color: var(--ink);
}

.sf-field input:focus-visible,
.sf-field select:focus-visible {
	outline: 2px solid var(--blue);
	outline-offset: 1px;
}

.sf-form-member {
	flex-direction: column;
	align-items: flex-start;
}

.sf-form-member p {
	margin: 0;
	font-weight: 600;
}

.sf-form-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.sf-note {
	margin: 0;
	font-size: .88rem;
	color: var(--sf-band-soft);
}

/* ---------- score card ---------- */
.sf-score-card {
	margin: 0;
	background: var(--card);
	color: var(--ink);
	border-radius: 20px;
	border: 1px solid var(--line);
	box-shadow: 0 6px 24px rgba(33, 30, 24, .10);
	padding: 28px;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 14px;
}

.sf-score-top {
	align-self: stretch;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 10px;
}

.sf-gauge {
	position: relative;
	width: 280px;
	max-width: 100%;
	aspect-ratio: 1 / 1;
	margin-bottom: -26px;
}

.sf-gauge svg {
	width: 100%;
	height: 100%;
	display: block;
}

.sf-gauge circle {
	fill: none;
	stroke-width: 18;
	stroke-linecap: round;
}

.sf-gauge-track {
	stroke: var(--sf-track);
}

.sf-gauge-fill {
	stroke: var(--green);
}

.sf-gauge-text {
	position: absolute;
	inset: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
}

.sf-gauge-label {
	font-size: .85rem;
	color: var(--ink-soft);
}

.sf-gauge-value {
	font-size: clamp(3.4rem, 9vw, 4.8rem);
	font-weight: 600;
	line-height: 1;
	letter-spacing: -.03em;
	color: var(--ink);
}

.sf-gauge-max {
	font-size: .8rem;
	color: var(--ink-faint);
	margin-top: 2px;
}

.sf-gauge-band {
	margin-top: 6px;
	font-weight: 700;
	color: var(--green-strong);
}

.sf-scale {
	list-style: none;
	margin: 0;
	padding: 0;
	align-self: stretch;
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	gap: 4px;
	text-align: center;
}

.sf-scale li {
	display: flex;
	flex-direction: column;
	gap: 4px;
	font-size: .74rem;
	color: var(--ink-soft);
	min-width: 0;
}

.sf-scale-bar {
	display: block;
	height: 8px;
	border-radius: 999px;
}

.sf-scale-1 .sf-scale-bar { background: var(--sf-t1); }
.sf-scale-2 .sf-scale-bar { background: var(--sf-t2); }
.sf-scale-3 .sf-scale-bar { background: var(--sf-t3); }
.sf-scale-4 .sf-scale-bar { background: var(--sf-t4); }

.sf-scale li.is-current {
	color: var(--ink);
	font-weight: 700;
}

.sf-scale li.is-current .sf-scale-bar {
	outline: 2px solid var(--ink);
	outline-offset: 2px;
}

.sf-scale-range {
	font-size: .7rem;
}

.sf-caption {
	font-size: .78rem;
	color: var(--ink-faint);
	text-align: center;
}

/* ---------- pills (moss family, always labelled) ---------- */
.sf-pill {
	display: inline-flex;
	align-items: center;
	padding: 5px 12px;
	border-radius: 999px;
	font-size: .8rem;
	font-weight: 700;
	white-space: nowrap;
	background: var(--green-soft);
	color: var(--green-strong);
}

.sf-pill.is-focus {
	background: transparent;
	border: 1.5px solid var(--green);
}

.sf-pill.is-strength {
	background: var(--green);
	color: var(--paper);
}

/* ---------- overlap row ---------- */
.sf-card {
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 20px;
	box-shadow: var(--shadow);
}

.sf-overlap {
	position: relative;
	margin-top: -64px;
	display: grid;
	grid-template-columns: minmax(0, 1fr) 460px;
	gap: 24px;
	align-items: stretch;
}

.sf-shapes,
.sf-history {
	padding: 28px;
	min-width: 0;
}

.sf-card-head {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 12px;
	flex-wrap: wrap;
	margin-bottom: 6px;
}

.sf-home .sf-card h2 {
	margin: 0;
	font-size: 1.55rem;
	font-weight: 700;
	letter-spacing: -.01em;
}

.sf-card-head a {
	font-weight: 600;
	font-size: .92rem;
	color: var(--blue);
}

.sf-subjects {
	list-style: none;
	margin: 0;
	padding: 0;
}

.sf-subjects li {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 14px 0;
	border-bottom: 1px solid var(--line);
}

.sf-subjects li:last-child {
	border-bottom: 0;
}

.sf-subject {
	flex: 1 1 auto;
	display: flex;
	flex-direction: column;
	min-width: 0;
}

.sf-subject strong {
	font-size: 1.05rem;
	font-weight: 700;
}

.sf-subject span {
	font-size: .88rem;
	color: var(--ink-soft);
}

.sf-impact {
	flex: 0 0 104px;
	text-align: right;
	font-size: .8rem;
	color: var(--ink-soft);
}

.sf-history {
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.sf-history .sf-muted {
	margin: 0 0 8px;
}

.sf-chart {
	width: 100%;
	height: auto;
	display: block;
}

.sf-chart line {
	stroke: var(--line);
}

.sf-chart polyline {
	fill: none;
	stroke: var(--green);
	stroke-width: 3;
	stroke-linecap: round;
	stroke-linejoin: round;
}

.sf-chart circle {
	fill: var(--green);
	stroke: var(--card);
	stroke-width: 3;
}

.sf-chart circle.is-latest {
	fill: var(--green-strong);
}

.sf-chart text {
	text-anchor: middle;
	fill: var(--ink-soft);
}

.sf-chart-val {
	font-family: var(--font-mono);
	font-size: 14px;
	font-weight: 600;
}

.sf-chart-val.is-latest {
	font-size: 16px;
	fill: var(--ink);
}

.sf-chart-axis {
	font-family: var(--font-body);
	font-size: 13px;
}

/* ---------- recommended tools ---------- */
.sf-recs {
	padding-top: 80px;
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.sf-home .sf-recs > h2 {
	margin: 0 0 12px;
	font-size: clamp(1.7rem, 3.4vw, 2.5rem);
	line-height: 1.12;
	font-weight: 800;
	letter-spacing: -.02em;
}

.sf-rec-list {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 14px;
}

.sf-rec {
	display: grid;
	grid-template-columns: 80px minmax(0, 1fr) minmax(0, 300px) 140px auto;
	align-items: center;
	gap: 24px;
	padding: 22px 24px;
}

.sf-rec-icon {
	width: 80px;
	height: 80px;
	border-radius: 16px;
	background: var(--blue-soft);
	color: var(--blue-strong);
	display: grid;
	place-items: center;
	font-size: 2.1rem;
	line-height: 1;
	overflow: hidden;
}

.sf-rec-main {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 4px;
	min-width: 0;
}

.sf-home .sf-rec-main h3 {
	margin: 0;
	font-size: 1.2rem;
	font-weight: 700;
	line-height: 1.25;
}

.sf-access {
	margin-top: 4px;
	display: inline-flex;
	padding: 3px 10px;
	border-radius: 999px;
	font-size: .74rem;
	font-weight: 700;
}

.sf-access.is-free {
	background: var(--blue-soft);
	color: var(--blue-strong);
}

.sf-access.is-premium {
	border: 1.5px solid var(--blue);
	color: var(--blue-strong);
}

.sf-rec-why {
	display: flex;
	flex-direction: column;
	gap: 4px;
	font-size: .94rem;
	min-width: 0;
}

.sf-fit {
	display: flex;
	flex-direction: column;
	gap: 6px;
	font-size: .88rem;
}

.sf-fit strong {
	color: var(--blue-strong);
	font-weight: 700;
}

.sf-fit-track {
	display: block;
	height: 8px;
	border-radius: 999px;
	background: var(--sf-track);
	overflow: hidden;
}

.sf-fit-track span {
	display: block;
	height: 100%;
	border-radius: 999px;
	background: var(--blue);
}

.sf-recs-note {
	margin: 6px 0 0;
}

/* ---------- how it works ---------- */
.sf-how {
	padding-top: 80px;
}

.sf-home .sf-how h2 {
	margin: 0 0 20px;
	font-size: clamp(1.7rem, 3.4vw, 2.5rem);
	font-weight: 800;
	letter-spacing: -.02em;
}

.sf-steps {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 24px;
}

.sf-steps li {
	border-top: 3px solid var(--green);
	padding-top: 16px;
}

.sf-step-num {
	font-size: .9rem;
	font-weight: 600;
	color: var(--green-strong);
}

.sf-home .sf-steps h3 {
	margin: 6px 0 6px;
	font-size: 1.2rem;
	font-weight: 700;
}

.sf-steps p {
	margin: 0;
	color: var(--ink-soft);
	line-height: 1.6;
}

/* ---------- trust cards ---------- */
.sf-trust {
	padding: 96px 0 104px;
}

.sf-home .sf-trust h2 {
	margin: 0 0 32px;
	text-align: center;
	font-size: clamp(1.7rem, 3.4vw, 2.5rem);
	line-height: 1.15;
	font-weight: 800;
	letter-spacing: -.02em;
}

.sf-trust-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 24px;
}

/* One brand hue per card: moss, slate, rust. Each card's title carries
   the meaning, so the colour is never the only signal. */
.sf-trust-card {
	--tone: var(--green);
	--tone-soft: var(--green-soft);
	--tone-strong: var(--green-strong);
	background: var(--tone-soft);
	border: 1px solid color-mix(in srgb, var(--tone) 30%, var(--line));
	border-top: 5px solid var(--tone);
	border-radius: 20px;
	padding: 28px;
}

.sf-trust-card.is-blue {
	--tone: var(--blue);
	--tone-soft: var(--blue-soft);
	--tone-strong: var(--blue-strong);
}

.sf-trust-card.is-rust {
	--tone: var(--rust);
	--tone-soft: var(--rust-soft);
	--tone-strong: var(--rust-strong);
}

.sf-trust-icon {
	width: 48px;
	height: 48px;
	border-radius: 14px;
	display: grid;
	place-items: center;
	margin-bottom: 16px;
	background: var(--card);
	color: var(--tone-strong);
	border: 1.5px solid color-mix(in srgb, var(--tone) 40%, transparent);
}

.sf-home .sf-trust-card h3 {
	margin: 0 0 8px;
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--tone-strong);
}

.sf-trust-card p {
	margin: 0;
	line-height: 1.6;
	color: var(--ink);
}

.sf-home .sf-trust-note {
	margin: 32px auto 0;
	max-width: 56ch;
	text-align: center;
	color: var(--ink-soft);
	font-size: 1.05rem;
	line-height: 1.6;
}

/* ---------- closing banner ---------- */
.sf-cta {
	border-top: 1px solid var(--line);
	border-bottom: 1px solid var(--line);
	padding: 72px 0;
	margin-top: 0;
}

.sf-cta-inner {
	max-width: 680px;
	margin: 0 auto;
	text-align: center;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 14px;
}

.sf-home .sf-cta h2 {
	margin: 0;
	font-size: clamp(1.7rem, 3.4vw, 2.5rem);
	line-height: 1.15;
	font-weight: 800;
	letter-spacing: -.02em;
	text-align: center;
}

.sf-cta p {
	margin: 0 0 8px;
	max-width: 52ch;
	color: var(--ink-soft);
	font-size: 1.05rem;
	line-height: 1.6;
	text-align: center;
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
	.sf-rec {
		grid-template-columns: 72px minmax(0, 1fr) 150px;
		grid-template-areas:
			"icon main fit"
			"icon why  btn";
		row-gap: 12px;
	}
	.sf-rec-icon { grid-area: icon; width: 72px; height: 72px; align-self: start; }
	.sf-rec-main { grid-area: main; }
	.sf-rec-why { grid-area: why; }
	.sf-fit { grid-area: fit; }
	.sf-rec .sf-btn { grid-area: btn; justify-self: start; }
}

@media (max-width: 960px) {
	.sf-hero {
		grid-template-columns: minmax(0, 1fr);
		gap: 36px;
		padding-top: 44px;
		padding-bottom: 104px;
	}
	.sf-score-card {
		max-width: 440px;
		width: 100%;
		box-sizing: border-box;
		justify-self: center;
	}
	.sf-overlap {
		grid-template-columns: minmax(0, 1fr);
	}
}

@media (max-width: 720px) {
	.sf-steps,
	.sf-trust-grid {
		grid-template-columns: minmax(0, 1fr);
		gap: 16px;
	}
	.sf-rec {
		grid-template-columns: 56px minmax(0, 1fr);
		grid-template-areas:
			"icon main"
			"why  why"
			"fit  fit"
			"btn  btn";
		gap: 14px;
		padding: 18px;
	}
	.sf-rec-icon { width: 56px; height: 56px; font-size: 1.6rem; border-radius: 12px; }
	.sf-rec .sf-btn { justify-self: stretch; }
	.sf-recs,
	.sf-how { padding-top: 56px; }
}

@media (max-width: 600px) {
	.sf-form {
		flex-direction: column;
		align-items: stretch;
		padding: 16px;
	}
	.sf-field-grade {
		flex: 0 0 auto;
	}
	.sf-form .sf-btn,
	.sf-cta .sf-btn {
		width: 100%;
		white-space: normal;
	}
	.sf-cta {
		padding: 48px 0;
	}
	.sf-trust {
		padding: 64px 0 72px;
	}
	.sf-shapes,
	.sf-history,
	.sf-score-card {
		padding: 20px;
	}
	.sf-subjects li {
		flex-wrap: wrap;
		gap: 6px 12px;
	}
	.sf-subject {
		flex-basis: 100%;
	}
	.sf-impact {
		flex: 1 1 auto;
		text-align: left;
	}
	.sf-home .sf-card h2 {
		font-size: 1.3rem;
	}
}

@media (prefers-reduced-motion: no-preference) {
	.sf-btn {
		transition: background-color .15s ease, color .15s ease;
	}
}